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US3813533A Expired / Lapsed US ⏱️ 0.0 years remaining

Clock calculator

Assignee: Garrett Comtronics Corp
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Filing: 1972-06-02
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Granted: 1974-05-28
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Expires: 1992-06-02
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Abstract

Abstract A combined clock calculator having a calculator mode to perform and/or display arithmetic functions and results and a digital clock mode to perform and/or display time related functions.

Inventors

  • 👤 G Cone
  • 👤 J Kinzie

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 02:52
CPC Classifications
G; G04; G04G; G04G9/00; G04G9/0064; G04G9/007; G06; G06F; G06F15/00; G06F15/02

Claims Analysis

Total Claims: 53
Claim 1
Independent Claim 228 words
A clock calculator comprising: a solid state calculating circuitry chip for performing arithmetic calculations in response to digital input data and for generating digital information related to said calculations; a solid state clock circuitry chip for performing time-related clock functions with reference to digital input data including the continuous accumulation of time increments to provide an indication of time of day and for generating digital information related to said time-related clock functions; a manual keyboard for manually providing digital input data; circuit means for supplying said digital input data from said manual keyboard to said calculating circuitry chip and said clock circuitry chip; an electronic digital display connected to said calculating circuitry chip and said clock circuitry chip to display said digital information therefrom; and, a power supply connected to said calculating circuitry chip, said clock circuitry chip and said display to supply electrical power thereto; said keyboard including means to select between a calculator mode of operation and a clock mode of operation, said selecting means being operable to effect the display by said digital display of said digital information from said calculating circuitry chip in said calculator mode and to effect the display by said digital display of said digital information from said clock circuitry chip in said clock mode, said manual keyboard and said digital display being common for said calculating and clock circuitry chips.
Claim 2
Dependent Claim 228 words
A clock calculator comprising: a solid state calculating circuitry chip for performing arithmetic calculations in response to digital input data and for generating digital information related to said calculations; a solid state clock circuitry chip for performing time-related clock functions with reference to digital input data including the continuous accumulation of time increments to provide an indication of time of day and for generating digital information related to said time-related clock functions; a manual keyboard for manually providing digital input data; circuit means for supplying said digital input data from said manual keyboard to said calculating circuitry chip and said clock circuitry chip; an electronic digital display connected to said calculating circuitry chip and said clock circuitry chip to display said digital information therefrom; and, a power supply connected to said calculating circuitry chip, said clock circuitry chip and said display to supply electrical power thereto; said keyboard including means to select between a calculator mode of operation and a clock mode of operation, said selecting means being operable to effect the display by said digital display of said digital information from said calculating circuitry chip in said calculator mode and to effect the display by said digital display of said digital information from said clock circuitry chip in said clock mode, said manual keyboard and said digital display being common for said calculating and clock circuitry chips.
Claim 3
Dependent Claim 152 words
In combination: a power supply for providing regulated electrical energy; at least one solid state, integrated circuit chip connected to said power supply to receive said regulated electrical energy therefrom, said at least one chip including electronic calculator circuit means for digitally performing arithmetic calculations and electronic clock circuit means for digitally performing time-related clock functions including the continuous accumulation of time increments to provide a continuously updated time of day; manual keyboard means connected to said at least one chip for selectively supplying digital data signals representative of numerical and time values to said calculator and clock circuit means on said at least one chip; and, digital display means connected to said power supply and said at least one chip for visually displaying a selected one of the results of the arithmetic calculations of said calculator circuit means and the results of the time-related clock functions of said clock circuit means.
Claim 4
Dependent Claim 152 words
In combination: a power supply for providing regulated electrical energy; at least one solid state, integrated circuit chip connected to said power supply to receive said regulated electrical energy therefrom, said at least one chip including electronic calculator circuit means for digitally performing arithmetic calculations and electronic clock circuit means for digitally performing time-related clock functions including the continuous accumulation of time increments to provide a continuously updated time of day; manual keyboard means connected to said at least one chip for selectively supplying digital data signals representative of numerical and time values to said calculator and clock circuit means on said at least one chip; and, digital display means connected to said power supply and said at least one chip for visually displaying a selected one of the results of the arithmetic calculations of said calculator circuit means and the results of the time-related clock functions of said clock circuit means.
Claim 5
Dependent Claim 70 words
The combination of claim 2 wherein said at least one chip includes: output processing means for substantially continuously receiving output signals from said calculator circuit means and said clock circuit means including the results of the arithmetic calculations and the results of the time-related clock functions and for periodically applying said results to said digital display means at a repetition rate to provide the appearance of a steady visual display.
Claim 6
Dependent Claim 63 words
The combination of claim 2 wherein said at least one chip includes: circuit means for generating timing signals and supplying said timing signals to said calculator circuit means, to said clock circuit means and to said manual keyboard means, said timing signals synchronously multiplexing the supplying of said digital data signals from said manual keyboard means to said clock and calculator circuit means.
Claim 7
Dependent Claim 21 words
The combination of claim 2 wherein both said calculator circuit means and said clock circuit means each comprise a MOS/LSI chip.
Claim 8
Dependent Claim 22 words
The combination of claim 2 wherein said calculating circuit means and said clock circuit means are integrated into a single MOS/LSI chip.
Claim 9
Dependent Claim 23 words
The combination of claim 2 wherein said digital display is a visible radiation display and includes a plurality of glow discharge indicator tubes.
Claim 10
Dependent Claim 13 words
The combination of claim 2 wherein said digital display is an electro-fluorescent display.
Claim 11
Dependent Claim 39 words
The combination of claim 2 and in addition shaping circuit means to receive a time dependent AC signal of at least 50 hertz from said power supply and to provide a conditioned timing signal to said clock circuit means.
Claim 12
Dependent Claim 49 words
The combination of claim 2 and in addition a stable oscillator to generate a time dependent AC signal of at least 50 hertz, and shaping circuit means connected to said oscillator to receive and condition the AC signal and provide the conditioned AC signal to said clock circuit means.
Claim 13
Dependent Claim 46 words
The combination of claim 2 wherein said clock circuit means includes alarm logic means to provide an alarm signal and in addition an alarm means to be activated by the alarm signal, said keyboard including means to select an alarm mode of said clock circuit means.
Claim 14
Dependent Claim 25 words
The combination of claim 11 and in addition to timed switch connected to said alarm logic means to receive and operate from a signal therefrom.
Claim 15
Dependent Claim 46 words
The combination of claim 2 wherein said clock circuit means includes a mechanical output processing section to provide a mechanical output signal representing a day and month and in addition mechanical means to receive and utilize the mechanical output signal to display said day and month.
Claim 16
Dependent Claim 13 words
The combination of claim 13 wherein said mechanical means is a drum calendar.
Claim 17
Dependent Claim 35 words
The combination of claim 2 wherein said manual input means includes numerical keys to provide numerical calculating and time values, operation keys to provide operation commands and switching keys to select the mode of operation.
Claim 18
Dependent Claim 140 words
Apparatus comprising: a manual keyboard including means for manually selecting between a calculating mode and a clock mode of operation of said apparatus and means for selectively generating digital input data; calculator means for digitally performing arithmetic calculations including addition, subtraction, multiplication and division; clock means for digitally performing time-related clock functions including the continuous accumulation of time increments to provide an indication of time of day; and, circuit means for supplying said digital input data from said manual keyboard to said calculator means and said clock means; said calculator means performing arithmetic calculations with said digital input data from said keyboard in response to the selection of said calculating mode of operation, and said clock means performing time-related functions with reference to said digital data from said keyboard in response to the selection of said clock mode of operation.
Claim 19
Dependent Claim 140 words
Apparatus comprising: a manual keyboard including means for manually selecting between a calculating mode and a clock mode of operation of said apparatus and means for selectively generating digital input data; calculator means for digitally performing arithmetic calculations including addition, subtraction, multiplication and division; clock means for digitally performing time-related clock functions including the continuous accumulation of time increments to provide an indication of time of day; and, circuit means for supplying said digital input data from said manual keyboard to said calculator means and said clock means; said calculator means performing arithmetic calculations with said digital input data from said keyboard in response to the selection of said calculating mode of operation, and said clock means performing time-related functions with reference to said digital data from said keyboard in response to the selection of said clock mode of operation.
Claim 20
Dependent Claim 96 words
The apparatus of claim 16: wherein said calculator means includes shift register means for temporarily storing said generated digital input data supplied to said calculator means from said manual keyboard; and, wherein said clock means includes storage registeR means connected to said shift register means for storing time-related digital data; said stored digital input data being retained in said shift register means to perform arithmetic calculations in response to the selection of said calculating mode and being shifted into said storage register means to perform time-related functions in response to the selection of said clock mode.
Claim 21
Dependent Claim 75 words
The apparatus of claim 17 wherein said storage register means includes a calendar storage register for storing a first digital signal representing an updated day and month, said apparatus further including mechanical output processing means for providing a mechanical output drive signal in response to said first digital signal, and mechanical means connected to said mechanical output processing means for receiving said mechanical output drive signal and providing a display of said day and month.
Claim 22
Dependent Claim 63 words
The apparatus of claim 17 wherein said storage register means includes an interval storage register for storing a first digital signal representing elapsed time relative to a predetermined reference time, said keyboard including means for selecting an interval mode, said clock means including means for incrementing said first digital signal at predetermined time intervals in response to the selection of said interval mode.
Claim 23
Dependent Claim 93 words
The apparatus of claim 17 wherein said storage register means includes a time of day storage register for storing a first digital signal representing an updated time of day and an alarm storage register for storing a second digital signal representing a predetermined, fixed time of day, said keyboard including means for selecting an alarm mode, said clock means including means for comparing said first and second digital signals and means for providing an indication of coincidence between said first and second digital signals in response to the selection of said alarm mode.
Claim 24
Dependent Claim 63 words
The apparatus of claim 20 wherein said storage register means includes an interval storage register for storing a third digital signal representing elapsed time relative to a predetermined reference time, said keyboard including means for selecting an interval mode, said clock means including means for incrementing said third digital signal at predetermined time intervals in response to the selection of said interval mode.
Claim 25
Dependent Claim 59 words
The apparatus of claim 21 including: digital display means for displaying numerical information; and, means for selecting one of said first, second and third digital signals and the results of the arithmetic calculations of said calculator means for display as numerical information by said digital display means in response to the selection of a corresponding one of said modes.
Claim 26
Dependent Claim 75 words
The apparatus of claim 21 wherein said storage register means includes a calendar storage register for storing a fourth digital signal representing an updated day and month, said apparatus further including mechanical output processing means for providing a mechanical output drive signal in response to said fourth digital signal, and mechanical means connected to said mechanical output processing means for receiving said mechanical output drive signal and providing a display of said day and month.
Claim 27
Dependent Claim 48 words
The apparatus of claim 23 including: digital display means for displaying numerical information; and, means for selecting one of said first, second and third digital signals for display as numerical information by said digital display means in response to the selection of a corresponding one of said modes.
Claim 28
Dependent Claim 46 words
The apparatus of claim 16 including oscillator means for generating a timing signal, said oscillator means, said calculator means and said clock means being formed on at least one integrated circuit chip, said calculator and clock means being synchronously clocked in response to said timing signal.
Claim 29
Dependent Claim 96 words
The apparatus of claim 25: wherein said calculator means includes shift register means for temporarily storing said digital input data supplied to said calculator means from said manual keyboard; and, wherein said clock means includes a storage register means connected to said shift register means for storing time-related digital data, said stored digital input data being retained in said shift register means to perform arithmetic calculations in response to the selection of said calculating mode and being shifted into said storage register means to perform time-related functions in response to the selection of said clock mode.
Claim 30
Dependent Claim 63 words
The apparatus of claim 26 wherein said storage register means includes an interval storage register for storing a third digital signal representing elapsed time relative to a predetermined reference time, said keyboard including means for selecting an interval mode, said clock means including means for incrementing said third digital signal at predetermined time intervals in response to the selection of said interval mode.
Claim 31
Dependent Claim 151 words
The apparatus of claim 26 wherein said storage register means includes a time of day storage register for storing a first digital signal representing an updated time of day and an alarm storage register for storing a second digital signal representing a predetermined, fixed time of day, said keyboard including means for selecting an alarm mode, said clock means including means for comparing said first and second digital signals and means for providing an indication of coincidence between said first and second digital signals in response to the selection of said alarm mode. 29 The apparatus of claim 28 including: digital display means connected to said at least one integrated circuit chip for visually displaying numerical information; and, means for selecting one of said first and second digital signals for display as numerical information by said digital display means in response to the selection of a corresponding one of said modes.
Claim 32
Dependent Claim 47 words
The apparatus of claim 16 including: display means for visually displaying numerical information; and, means for selectively supplying data from one of said calculator means and said clock means for visual display as numerical information in response to the selection of a corresponding one of said modes.
Claim 33
Dependent Claim 46 words
The apparatus of claim 30 including oscillator means for generating a timing signal, said oscillator means, said calculator means and said clock means being formed on at least one integrated circuit chip, said calculator and clock means being synchronously clocked in response to said timing signal.
Claim 34
Dependent Claim 95 words
The apparatus of claim 31: wherein said calculator means includes shift register means for temporarily storing said digital input data supplied to said calculator means from said manual keyboard; and, wherein said clock means includes storage register means connected to said shift register means for storing time-related digital data, said stored digital input data being retained in said shift register means to perform arithmetic calculations in response to the selection of said calculating mode and being shifted into said storage register means to perform time-related functions in response to the selection of said clock mode.
Claim 35
Dependent Claim 93 words
The apparatus of claim 32 wherein said storage register means includes a time of day storage register for storing a first digital signal representing an updated time of day and an alarm storage register for storing a second digital signal representing a predetermined, fixed time of day, said keyboard including means for selecting an alarm mode, said clock means including means for comparing said first and second digital signals and means for providing an indication of coincidence between said first and second digital signals in response to the selection of said alarm mode.
Claim 36
Dependent Claim 63 words
The apparatus of claim 33 wherein said storage register means includes an interval storage register for storing a third digital signal representing elapsed time relative to a predetermined reference time, said keyboard including means for selecting an interval mode, Said clock means including means for incrementing said third digital signal at predetermined time intervals in response to the selection of said interval mode.
Claim 37
Dependent Claim 34 words
The apparatus of claim 31 including a manually portable cabinet for housing said calculator means, said clock means, said clock oscillator means, said keyboard and said display means, whereby said apparatus is manually portable.
Claim 38
Dependent Claim 33 words
The apparatus of claim 35 including power supply means housed by said portable cabinet for supplying regulated electrical energy to said calculating means, said clock means, said oscillator means and said display means.
Claim 39
Dependent Claim 160 words
Apparatus comprising: calculator means for digitally performing arithmetic calculations, said calculator means including shift register means for temporarily storing digital data; clock means for digitally performing time-related clock functions, said clock means including storage register means for storing time-related digital data; mode selecting means including means for manually selecting a calculating mode and means for manually selecting a clock mode; means for selectively, manually entering digital input data into said shift register means for storage thereof; and, circuit means responsive to said mode selecting means for selectively supplying said stored digital input data from said shift register means to said storage register means, said stored digital input data being retained in said shift register means for use in performing said arithmetic calculations in response to the selection of said calculating mode and being shifted into said storage register means to provide a time reference from which to perform time-related clock functions in response to the selection of said clock mode.
Claim 40
Dependent Claim 160 words
Apparatus comprising: calculator means for digitally performing arithmetic calculations, said calculator means including shift register means for temporarily storing digital data; clock means for digitally performing time-related clock functions, said clock means including storage register means for storing time-related digital data; mode selecting means including means for manually selecting a calculating mode and means for manually selecting a clock mode; means for selectively, manually entering digital input data into said shift register means for storage thereof; and, circuit means responsive to said mode selecting means for selectively supplying said stored digital input data from said shift register means to said storage register means, said stored digital input data being retained in said shift register means for use in performing said arithmetic calculations in response to the selection of said calculating mode and being shifted into said storage register means to provide a time reference from which to perform time-related clock functions in response to the selection of said clock mode.
Claim 41
Dependent Claim 47 words
The apparatus of claim 37 including: display means for visually displaying numerical information; and, means for selectively supplying data from one of said calculator means and said clock means for visual display as numerical information in response to the selection of a corresponding one of said modes.
Claim 42
Dependent Claim 46 words
The apparatus of claim 38 including oscillator means for generating a timing signal, said oscillator means, said calculator means and said clock means being formed on at least one integrated circuit chip, said calculator and clock means being synchronously clocked in response to said timing signal.
Claim 43
Dependent Claim 95 words
The apparatus of claim 39 wherein said storage register means includes a time of day storage register for storing a first digital signal representing an updated time of day and an alarm storage register for storing a second digital signal representing a predetermined, fixed time of day, said mode selecting means including means for selecting an alarm mode, said clock means including means for comparing said first and second digital signals and means for providing an indication of coincidence between said first and second digital signals in response to the selection of said alarm mode.
Claim 44
Dependent Claim 65 words
The apparatus of claim 40 wherein said storage register means includes an interval storage register for storing a third digital signal representing elapsed time relative to a predetermined reference time, said mode selecting means including means for selecting an interval mode, said clock means including means for incrementing said third digital signal at predetermined time intervals in response to the selection of said interval mode.
Claim 45
Dependent Claim 40 words
The apparatus of claim 39 including a manually portable cabinet for housing said calculator means, said clock means, said oscillator means, said mode selecting means, said digital data entering means and said display means, whereby said apparatus is manually portable.
Claim 46
Dependent Claim 33 words
The apparatus of claim 42 including power supply means housed by said portable cabinet for supplying regulated electrical energy to said calculating means, said clock means, said oscillator means and said display means.
Claim 47
Dependent Claim 30 words
The apparatus of claim 43 wherein said clock means and said calculator means are formed on no morE than two large scale integrated insulated gate field effect transister circuit chips.
Claim 48
Dependent Claim 124 words
The apparatus of claim 38 wherein said storage register means includes an interval storage register for storing a digital signal representing elapsed time relative to a predetermined reference time, said mode selecting means including means for selecting an interval mode, said data entering means including means for entering said reference time into said interval storage register, said clock means including means for incrementing or decrementing said digital signal representing elapsed time at predetermined time intervals in response to the selection of said interval mode, said digital signal being incremented in response to the entering of a zero reference time into said interval storage register and being decremented in response to the entering of a greater than zero reference time into said interval storage register.
Claim 49
Dependent Claim 47 words
The apparatus of claim 38 wherein said storage register means includes a calendar storage register for storing a digital signal representing a day and a month, said day and month being selectively displayed by said display means in response to the selection thereof by said supplying means.
Claim 50
Independent Claim 285 words
A method for selectively providing and displaying clock and calculating functions comprising the steps of: providing circuit means including digital arithmetic calculating circuitry and digital clock circuitry each including at least one storage register and each being operatively connected to a digital display and to a manual input device, said input device including manually positionable mode select means for selecting between a plurality of modes of operation of said circuit means, and manually positionable numerical data entering means, said calculating circuitry being operable to perform arithmetic calculations with numerical data stored in said at least one storage register included in said calculating circuitry and to provide an ouptut signal representative of the results of the arithmetic calculations in a calculating mode of operation of said circuit means, and said clock circuitry being operable to perform time-related clock functions with reference to numerical data stored in said at least one storage register included in said clock circuitry and to provide an output signal representative of the results of the time-related clock functions in a clock mode of operation of said circuit means; continuously accumulating increments of time to provide an output signal representing time of day in said at least one register of said clock circuitry; selecting one of a clock mode and a calculating mode of operation of said circuit means by manually positioning said mode select means; entering numerical data into the one of said storage registers of the calculating circuitry and the clock circuitry corresponding to the selected mode by manually positioning said numerical data entering means; and, selectively displaying an output signal from one of said calculating circuitry and said clock circuitry on said digital display in response to the selected mode.
Claim 51
Independent Claim 285 words
A method for selectively providing and displaying clock and calculating functions comprising the steps of: providing circuit means including digital arithmetic calculating circuitry and digital clock circuitry each including at least one storage register and each being operatively connected to a digital display and to a manual input device, said input device including manually positionable mode select means for selecting between a plurality of modes of operation of said circuit means, and manually positionable numerical data entering means, said calculating circuitry being operable to perform arithmetic calculations with numerical data stored in said at least one storage register included in said calculating circuitry and to provide an ouptut signal representative of the results of the arithmetic calculations in a calculating mode of operation of said circuit means, and said clock circuitry being operable to perform time-related clock functions with reference to numerical data stored in said at least one storage register included in said clock circuitry and to provide an output signal representative of the results of the time-related clock functions in a clock mode of operation of said circuit means; continuously accumulating increments of time to provide an output signal representing time of day in said at least one register of said clock circuitry; selecting one of a clock mode and a calculating mode of operation of said circuit means by manually positioning said mode select means; entering numerical data into the one of said storage registers of the calculating circuitry and the clock circuitry corresponding to the selected mode by manually positioning said numerical data entering means; and, selectively displaying an output signal from one of said calculating circuitry and said clock circuitry on said digital display in response to the selected mode.
Claim 52
Dependent Claim 764 words
An electronic device comprising: a power supply for converting and regulating electrical energy; a keyboard including numerical keys for providing timed digital signals representing numerical data, operation keys for providing timed digital signals representing operation commands, and mode keys for selecting between a plurality of modes of operation; an electronic digital display connected to said power supply for visually displaying numerical data in response to the application thereto of a digital signal, said display including signal selecting means for effecting the visual display of one of a plurality of applied signals in accordance with the mode selected by said mode keys; a large scale integrated insulated gate field effect calculating device connected to said power supply and to said keyboard to respectively receive said electrical energy and said digital signals Therefrom, said calculating device being operable to electronically perform arithmetic calculations, said calculating device including: a timing oscillator for generating two-phase signals; a central timing means for generating timing and synchronizing signals in response to said two-phase signals; converter means for converting said timed digital signals from said keyboard into coded digital signals having a binary coded decimal format; a bounce eliminator means connected to said converter means for removing noise from said timed digital signals received from said keyboard and providing irredundant digital data to said converter means; arithmetic and control circuit means connected to said converter means for arithmetically processing said coded digital signals in accordance with arithmetic operations commanded by said operation keys in response to the selection of a calculating mode of operation by said mode keys, said arithmetic and control circuit means including means for storing said coded digital signals and calculator output signals representing the results of the commanded arithmetic operations; and, output processing means connected to said arithmetic and control circuit means, to said central timing means and to said digital display for supplying said calculator output signals to said selecting means of said digital display in a time-phased manner; a large scale integrated insulated gate field effect clock device connected to said power supply and to said calculating device to respectively receive said electrical energy and said coded digital signals therefrom, said clock device being operable to electronically perform timerelated clock functions, said clock device including: a central timing means for receiving said calculator timing signals from said calculating device central timing means and for deriving clock timing signals therefrom; a plurality of registers including a time of day register and an alarm register for receiving and storing said stored coded digital signals from said calculating device arithmetic and control circuit means; switch input logic means for receiving at least some of said signals provided by said keyboard, for inhibiting the operation of said calculating device output processing means and controlling the storage of said coded digital signals by said registers in response to said at least some of said signals received from said keyboard; countdown means for producing a single pulse each second; incrementer means connected to said countdown means and to said registers for incrementing the coded digital signal stored by at least one of said plurality of registers with said single pulse in response to said at least some of said signals received from said keyboard; output processing means connected to said plurality of registers, to said digital display and to said clock device central timing means for supplying said coded digital signals stored by said plurality of registers to said selecting means of said digital display in a time-phased manner; alarm logic means connected to said time of day and alarm registers for producing an alarm signal in response to coincidence between the digital signals stored by said time of day and alarm registers; and, mechanical output processing means connected to a predetermined one of said registers for producing a mechanical drum calendar drive signal in response to the digital signal stored by said one of said registers; a shaping circuit connected to said power supply and to said countdown means for receiving a time dependent AC signal from said power supply and for providing a conditioned periodic signal of at least 50 Hertz to said countdown means; a drum calendar connected to said mechanical output processing means for providing an indication of a month and a day in response to said mechanical drum calendar drive signal; alarm means connected to said alarm logic means for producing an audible alarm indicatiOn in response to said alarm signal; and, timed switch means connected to said alarm logic means for providing electrical output power to an external device in response to said alarm signal.
Claim 53
Dependent Claim 764 words
An electronic device comprising: a power supply for converting and regulating electrical energy; a keyboard including numerical keys for providing timed digital signals representing numerical data, operation keys for providing timed digital signals representing operation commands, and mode keys for selecting between a plurality of modes of operation; an electronic digital display connected to said power supply for visually displaying numerical data in response to the application thereto of a digital signal, said display including signal selecting means for effecting the visual display of one of a plurality of applied signals in accordance with the mode selected by said mode keys; a large scale integrated insulated gate field effect calculating device connected to said power supply and to said keyboard to respectively receive said electrical energy and said digital signals Therefrom, said calculating device being operable to electronically perform arithmetic calculations, said calculating device including: a timing oscillator for generating two-phase signals; a central timing means for generating timing and synchronizing signals in response to said two-phase signals; converter means for converting said timed digital signals from said keyboard into coded digital signals having a binary coded decimal format; a bounce eliminator means connected to said converter means for removing noise from said timed digital signals received from said keyboard and providing irredundant digital data to said converter means; arithmetic and control circuit means connected to said converter means for arithmetically processing said coded digital signals in accordance with arithmetic operations commanded by said operation keys in response to the selection of a calculating mode of operation by said mode keys, said arithmetic and control circuit means including means for storing said coded digital signals and calculator output signals representing the results of the commanded arithmetic operations; and, output processing means connected to said arithmetic and control circuit means, to said central timing means and to said digital display for supplying said calculator output signals to said selecting means of said digital display in a time-phased manner; a large scale integrated insulated gate field effect clock device connected to said power supply and to said calculating device to respectively receive said electrical energy and said coded digital signals therefrom, said clock device being operable to electronically perform timerelated clock functions, said clock device including: a central timing means for receiving said calculator timing signals from said calculating device central timing means and for deriving clock timing signals therefrom; a plurality of registers including a time of day register and an alarm register for receiving and storing said stored coded digital signals from said calculating device arithmetic and control circuit means; switch input logic means for receiving at least some of said signals provided by said keyboard, for inhibiting the operation of said calculating device output processing means and controlling the storage of said coded digital signals by said registers in response to said at least some of said signals received from said keyboard; countdown means for producing a single pulse each second; incrementer means connected to said countdown means and to said registers for incrementing the coded digital signal stored by at least one of said plurality of registers with said single pulse in response to said at least some of said signals received from said keyboard; output processing means connected to said plurality of registers, to said digital display and to said clock device central timing means for supplying said coded digital signals stored by said plurality of registers to said selecting means of said digital display in a time-phased manner; alarm logic means connected to said time of day and alarm registers for producing an alarm signal in response to coincidence between the digital signals stored by said time of day and alarm registers; and, mechanical output processing means connected to a predetermined one of said registers for producing a mechanical drum calendar drive signal in response to the digital signal stored by said one of said registers; a shaping circuit connected to said power supply and to said countdown means for receiving a time dependent AC signal from said power supply and for providing a conditioned periodic signal of at least 50 Hertz to said countdown means; a drum calendar connected to said mechanical output processing means for providing an indication of a month and a day in response to said mechanical drum calendar drive signal; alarm means connected to said alarm logic means for producing an audible alarm indicatiOn in response to said alarm signal; and, timed switch means connected to said alarm logic means for providing electrical output power to an external device in response to said alarm signal.

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-05-27 1977-11-26 1978-05-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-05-27 1981-11-26 1982-05-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-05-27 1985-11-26 1986-05-28 $7700.00 Window Closed / Lapsed

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