US3798428A
Expired / Lapsed
US
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Electronic time-keeping apparatus
Assignee: Seikosha KK
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Filing: 1972-03-20
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Granted: 1974-03-19
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Expires: 1992-03-20
Abstract
Abstract An electronic time-keeping apparatus generating counting pulses for a time count. The counting pulses are stored in registers connected to input gates of adders that develop, from the counting pulses stored by the registers, output signals through gates corresponding to a time count. The adders develop carry signals that are temporarily stored by a carry memory register and are applied back to the adders under control of a carry signal controller and through the latter for developing the time count output of the adders for higher order places in the time count. The time count is displayed on visual display means as a time indication corresponding to the time count. Provision is made for initial counting errors by use of an automatic initial error preventive circuit that detects errors in the counting signals stored which may result from noise or at the start of the count and signals are developed that are applied to the adders thus varying the signal content received by the adders so that the time count output thereof is free of these initial errors. Control circuitry in the form of reset circuitry is provided for resetting the time count by applying signals at will to the adders to reset the time count output and thereby the time indication of the visual display means. The control circuitry includes time advancing circuitry by which the time count output is advanced by applying signals to the adders at will so that the time count indication is advanced and an advanced time or corrected time may be displayed. The apparatus may be embodied in small clocks.
Inventors
- 👤 M Izawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:04
CPC Classifications
G; G04; G04G; G04G3/00; G04G3/02; G04G3/022; G04G3/025; G04G5/00; G04G5/04; G04G5/043
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
188 words
An electronic time-keeping apparatus comprising, means generating pulsed counting signals for a time count, register means storing the counting signals, adder means developing from the counting signals of said register means a time count output and developing carry signals corresponding to higher order places in the time count, carry signal memory register means temporarily storing said carry signals, carry signal controlled means to receive the temporarily stored carry signals and apply them to said adder means to develop output signals corresponding to said time count output and respresentative of said higher order places of said time count, clock pulse generating means generating timing clock pulses applied to said carry signal controlled means controlling application of the carry signals to said adder means, display means displaying an indication of the time corresponding to said time count, and time-advancing means developing signals under manual control applied to said adder means for varying the stored contents of said register means received by said adder means to advance the time count output of said adder means to correspond to a desired time in advance of the time indicated at said display means.
Claim 2
Dependent Claim
188 words
An electronic time-keeping apparatus comprising, means generating pulsed counting signals for a time count, register means storing the counting signals, adder means developing from the counting signals of said register means a time count output and developing carry signals corresponding to higher order places in the time count, carry signal memory register means temporarily storing said carry signals, carry signal controlled means to receive the temporarily stored carry signals and apply them to said adder means to develop output signals corresponding to said time count output and respresentative of said higher order places of said time count, clock pulse generating means generating timing clock pulses applied to said carry signal controlled means controlling application of the carry signals to said adder means, display means displaying an indication of the time corresponding to said time count, and time-advancing means developing signals under manual control applied to said adder means for varying the stored contents of said register means received by said adder means to advance the time count output of said adder means to correspond to a desired time in advance of the time indicated at said display means.
Claim 3
Dependent Claim
189 words
An electronic time-keeping apparatus comprising, means generating pulsed counting signals for a time count, register means storing the counting signals, adder means developiNg from the counting signals of said register means a time count output and developing carry signals corresponding to higher order places in the time count, carry signal memory register means temporarily storing said carry signals, carry signal controlled means to receive the temporarily stored carry signals and apply them to said adder means to develop output signals corresponding to said time count output and representative of said higher order places of said time count, clock pulse generating means generating timing clock pulses applied to said carry signal controlled means controlling application of the carry signals to said adder means, display means displaying an indication of the time corresponding to said time count, and error preventive means automatically detecting initial errors in the stored counting signal content of said register means and developing signals applied to said adder means for varying in response to the detection of said errors the stored contents of said register means received by said adder means to correctly effect said time count.
Claim 4
Dependent Claim
189 words
An electronic time-keeping apparatus comprising, means generating pulsed counting signals for a time count, register means storing the counting signals, adder means developiNg from the counting signals of said register means a time count output and developing carry signals corresponding to higher order places in the time count, carry signal memory register means temporarily storing said carry signals, carry signal controlled means to receive the temporarily stored carry signals and apply them to said adder means to develop output signals corresponding to said time count output and representative of said higher order places of said time count, clock pulse generating means generating timing clock pulses applied to said carry signal controlled means controlling application of the carry signals to said adder means, display means displaying an indication of the time corresponding to said time count, and error preventive means automatically detecting initial errors in the stored counting signal content of said register means and developing signals applied to said adder means for varying in response to the detection of said errors the stored contents of said register means received by said adder means to correctly effect said time count.
Claim 5
Dependent Claim
188 words
An electronic time-keeping apparatus comprising, means generating pulsed counting signals for a time count, register means storing the counting signals, adder means developing from the counting signals of said register means a time count output and developing carry signals corresponding to higher order places in the time count, carry signal memory register means temporarily storing said carry signals, carry signal controlled means to receive the temporarily stored carry signals and apply them to said adder means to develop output signals corresponding to said time count output and representative of said higher order places of said time count, clock pulse generating means generating timing clock pulses applied to said carry signal controlled means controlling application of the carry signals to said adder means, display means displaying an indication of the time corresponding to said time count, and start switch means for controlling the start of a time count, and error preventive means automatically detecting errors in the counting signal content of said register means developed at the start of a time count and correcting the time count output of said adder means to correctly effect said indication of time.
Claim 6
Dependent Claim
188 words
An electronic time-keeping apparatus comprising, means generating pulsed counting signals for a time count, register means storing the counting signals, adder means developing from the counting signals of said register means a time count output and developing carry signals corresponding to higher order places in the time count, carry signal memory register means temporarily storing said carry signals, carry signal controlled means to receive the temporarily stored carry signals and apply them to said adder means to develop output signals corresponding to said time count output and representative of said higher order places of said time count, clock pulse generating means generating timing clock pulses applied to said carry signal controlled means controlling application of the carry signals to said adder means, display means displaying an indication of the time corresponding to said time count, and start switch means for controlling the start of a time count, and error preventive means automatically detecting errors in the counting signal content of said register means developed at the start of a time count and correcting the time count output of said adder means to correctly effect said indication of time.
Claim 7
Dependent Claim
217 words
An electronic time-keeping apparatus comprising, means generating pulsed counting signals for a time count, register means storing the counting signals, adder means developing from the counting signals of said register means a time count output and developing carry signals corresponding to higher order places in the time count, carry signal memory register means temporarily storing said carry signals, carry signal controlled means connected to receive the temporarily stored carry signals and apply them to said adder means to develop output signals representative of said higher order places of said time count, time-advancing means for developing signals applied to said adder means varying the stored contents of said register means received by said adder means to advance the time count to correspond to an advanced time, error preventive means detecting errors in the stored counting signal content of said register means and developing signals applied to said adder means varying the stored contents of said register means received by said adder means upon detection of said error to correctly make said time count, clock pulse generating means generating clock pulses applied to said carry signal controlled means controlling application of the carry signals to said adder means, and display means receptive of the time count output and displaying an indication of the time corresponding to said time count.
Claim 8
Dependent Claim
217 words
An electronic time-keeping apparatus comprising, means generating pulsed counting signals for a time count, register means storing the counting signals, adder means developing from the counting signals of said register means a time count output and developing carry signals corresponding to higher order places in the time count, carry signal memory register means temporarily storing said carry signals, carry signal controlled means connected to receive the temporarily stored carry signals and apply them to said adder means to develop output signals representative of said higher order places of said time count, time-advancing means for developing signals applied to said adder means varying the stored contents of said register means received by said adder means to advance the time count to correspond to an advanced time, error preventive means detecting errors in the stored counting signal content of said register means and developing signals applied to said adder means varying the stored contents of said register means received by said adder means upon detection of said error to correctly make said time count, clock pulse generating means generating clock pulses applied to said carry signal controlled means controlling application of the carry signals to said adder means, and display means receptive of the time count output and displaying an indication of the time corresponding to said time count.
Claim 9
Dependent Claim
183 words
An electronic time-keeping apparatus comprising: pulse generating means for developing a plurality of timing pulses and clock pulses; register means for storing and reading out a plurality of words of time data in synchronization with the clock pulses, adder means responsive to a given timing pulse of the Timing pulses for incrementing the time data applied thereto from said register means and for applying the incremented time data to said register means; carry signal memory register means for temporarily storing a carry output from said adder means and coactive with said adder means to effect an increment in the time data of a higher order word of the time data in synchronization with the clock pulses, carry signal controlled means successively receptive of the words of time data, said timing pulses and the carry output of each word stored in said carry signal memory register, for controlling the coaction of said adder means and said carry signal memory register means to increment the time data in a higher order word of time data; and display means for displaying the words of time data.
Claim 10
Dependent Claim
183 words
An electronic time-keeping apparatus comprising: pulse generating means for developing a plurality of timing pulses and clock pulses; register means for storing and reading out a plurality of words of time data in synchronization with the clock pulses, adder means responsive to a given timing pulse of the Timing pulses for incrementing the time data applied thereto from said register means and for applying the incremented time data to said register means; carry signal memory register means for temporarily storing a carry output from said adder means and coactive with said adder means to effect an increment in the time data of a higher order word of the time data in synchronization with the clock pulses, carry signal controlled means successively receptive of the words of time data, said timing pulses and the carry output of each word stored in said carry signal memory register, for controlling the coaction of said adder means and said carry signal memory register means to increment the time data in a higher order word of time data; and display means for displaying the words of time data.
Claim 11
Dependent Claim
62 words
An electronic time-keeping apparatus according to claim 5, including time-advancing means developing signals under manual control applied to said adder means for varying the stored time data of said register means received by said adder means to advance the time data output of said adder means to correspond to a desired time in advance of the time indicated at said display means.
Claim 12
Dependent Claim
61 words
An electronic time-keeping apparatus according to claim 5, including error preventive means automatically detecting initial erroneous time data stored in said register means and developing signals applied to said adder means for varying in response to the detection of said erroneous time data the stored contents of said register means received by said adder means to correctly effect the time data.
Claim 13
Dependent Claim
42 words
An electronic time-keeping apparatus according to claim 5, including reset means to reset at will the time data of a selected word in said register means to a desired time data, thereby to indicate a reset time indication on said display means.
Claim 14
Dependent Claim
59 words
An electronic time-keeping apparatus according to claim 5, including start switch means for controlling the start of a time count, and error preventive means automatically detecting erroneous time data stored in said register means developed at the start of a time count and correcting the time data output of said adder means to correctly effect said indication of time.
Claim 15
Dependent Claim
288 words
An electronic time-keeping apparatus comprising: pulse generating means for developing a plurality of timing pulses and clock pulses; register means for storing and reading out a plurality of words of time data in synchronization with the clock pulses adder means responsive to a given timing pulse of the timing pulses for incrementing the time data applied thereto from said register means and for applying the incremented time data to said register means; carry signal memory register means temporarily storing a carry output from said adder means and coactive with said adder means to effect an increment in the time data of a higher order word of the time data in synchronization with the clock pulses; carry signal controlled means successively receptive of the words of the time data, and timing pulses and the carry output of each word of the time data stored in said carry signal memory register means for controlling the coaction of said adder means and said carry signal memory register means to increment the time data in a higher order word of time data; time advancing means for developing signals applied to said adders to vary the stored contents of said register means received by said adders to advance the time data to correspond to an advanced time; error preventive means for detecting an error in the contents of any word stored in said register means and for developing signals applied to said adders to vary stored contents of that word in said register means received by said adders upon detection of said error and to correct the contents of that word; and display means receptive of the time data output words for displaying an indication of the time corresponding to said time data.
Claim 16
Dependent Claim
288 words
An electronic time-keeping apparatus comprising: pulse generating means for developing a plurality of timing pulses and clock pulses; register means for storing and reading out a plurality of words of time data in synchronization with the clock pulses adder means responsive to a given timing pulse of the timing pulses for incrementing the time data applied thereto from said register means and for applying the incremented time data to said register means; carry signal memory register means temporarily storing a carry output from said adder means and coactive with said adder means to effect an increment in the time data of a higher order word of the time data in synchronization with the clock pulses; carry signal controlled means successively receptive of the words of the time data, and timing pulses and the carry output of each word of the time data stored in said carry signal memory register means for controlling the coaction of said adder means and said carry signal memory register means to increment the time data in a higher order word of time data; time advancing means for developing signals applied to said adders to vary the stored contents of said register means received by said adders to advance the time data to correspond to an advanced time; error preventive means for detecting an error in the contents of any word stored in said register means and for developing signals applied to said adders to vary stored contents of that word in said register means received by said adders upon detection of said error and to correct the contents of that word; and display means receptive of the time data output words for displaying an indication of the time corresponding to said time data.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |