US3725877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self contained memory keyboard
Assignee: Motors Liquidation Co
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Filing: 1972-04-27
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Granted: 1973-04-03
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Expires: 1992-04-27
Abstract
Abstract A keyboard unit is disclosed for temporarily storing information for subsequent transfer to a computer. The unit includes a plurality of pushbuttons interconnected with a two-digit display through encoding and decoding circuitry, for operator verification of data entered and further includes a shift register memory for temporarily storing the data entered. The shift register memory is programmed by a counter so that the data is sequentially stored in the individual shift registers. The shift registers are operable in either a parallel input or serial output mode under the control of a flip-flop which responds to connection and disconnection of the memory keyboard with a computer. During the temporary storing of data the shift registers operate in a parallel mode. When the keyboard memory is connected with a computer the shift registers are switched to their serial output mode and the data is transmitted to the computer under computer control. A code word is stored in one of the memory shift registers to permit identification of the keyboard memory unit from which the data is being received. In the serial transmission of data to the computer a wrap-around circuit is provided which permits redundant transmission of data for verification by the computer.
Inventors
- 👤 R Keil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:29
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/02; G06F3/023
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
259 words
A portable self-contained memory keyboard unit for temporarily storing data for subsequent transfer to a computer comprising a plurality of individual operator actuable data switch means and store switch means, display means including a tens display and a units display, display control means responsive to operation of said data switch means for displaying in said time display the data represented by actuation of the first data switch means subsequent to actuation of the store switch means and for displaying the data represented by actuation of the first and second data switch means subsequent to actuation of said store switch means in said tens display and said units display respectively, power switching means for respectively energizing and deenergizing said display means in response to respective actuation and deactuation of any of said data switch means, memory means including a plurality of shift registers, mode control means normally establishing a parallel data input mode of operation of said memory means and responsive to connection of said device with said computer for establishing a serial data output mode, memory control means responsive to each actuation of said store switch means for entering the data previously displayed on said display means into one of said plurality of shift registers upon actuation of said store switch means, said memory control means including program counter means resettable from said mode control means and responsive to actuation of said store switch means for programming entry of data into successive ones of said plurality of shift registers in response to successive actuations of said store switch means.
Claim 2
Dependent Claim
259 words
A portable self-contained memory keyboard unit for temporarily storing data for subsequent transfer to a computer comprising a plurality of individual operator actuable data switch means and store switch means, display means including a tens display and a units display, display control means responsive to operation of said data switch means for displaying in said time display the data represented by actuation of the first data switch means subsequent to actuation of the store switch means and for displaying the data represented by actuation of the first and second data switch means subsequent to actuation of said store switch means in said tens display and said units display respectively, power switching means for respectively energizing and deenergizing said display means in response to respective actuation and deactuation of any of said data switch means, memory means including a plurality of shift registers, mode control means normally establishing a parallel data input mode of operation of said memory means and responsive to connection of said device with said computer for establishing a serial data output mode, memory control means responsive to each actuation of said store switch means for entering the data previously displayed on said display means into one of said plurality of shift registers upon actuation of said store switch means, said memory control means including program counter means resettable from said mode control means and responsive to actuation of said store switch means for programming entry of data into successive ones of said plurality of shift registers in response to successive actuations of said store switch means.
Claim 3
Dependent Claim
338 words
A portable self-contained memory keyboard unit for temporarily storing data for subsequent transfer to a computer comprising a plurality of individual operator actuable data switch means and store switch means, display means including a tens display and a units display, display control means responsive to operation of said data switch means for displaying in said time display the data represented by actuation of the first data switch means subsequent to actuation of the store switch means and for displaying the data represented by actuation of the first and second data switch means subsequent to actuation of said store switch means in said tens display and said units display respectively, power switching means for respectively energizing and deenergizing said display means in response to respective actuation and deactuation of any of said data switch means, memory means including a plurality of shift registers, mode control means normally establishing a parallel data input mode of operation of said memory means and responsive to connection of said device with said computer for establishing a serial data output mode, memory control means responsive to each actuation of said store switch means for entering the data previously displayed on said display means into one of said plurality of shift registers upon actuation of said store switch means, said memory control means including program counter means resettable from said mode control means and responsive to actuation of said store switch means for programming entry of data into successive ones of said plurality of shift registers in response to successive actuations of said store switch means, means responsive to connection of said keyboard unit to said computer for connecting the serial output of said first of said plurality of shift registers to the serial input of the last of said plurality of said shift registeRs to permit the data stored in said memory means to be transmitted to said computer under computer control and to permit comparison and verification of the data, and indicating means energizable from said computer for indicating verification of the data.
Claim 4
Dependent Claim
338 words
A portable self-contained memory keyboard unit for temporarily storing data for subsequent transfer to a computer comprising a plurality of individual operator actuable data switch means and store switch means, display means including a tens display and a units display, display control means responsive to operation of said data switch means for displaying in said time display the data represented by actuation of the first data switch means subsequent to actuation of the store switch means and for displaying the data represented by actuation of the first and second data switch means subsequent to actuation of said store switch means in said tens display and said units display respectively, power switching means for respectively energizing and deenergizing said display means in response to respective actuation and deactuation of any of said data switch means, memory means including a plurality of shift registers, mode control means normally establishing a parallel data input mode of operation of said memory means and responsive to connection of said device with said computer for establishing a serial data output mode, memory control means responsive to each actuation of said store switch means for entering the data previously displayed on said display means into one of said plurality of shift registers upon actuation of said store switch means, said memory control means including program counter means resettable from said mode control means and responsive to actuation of said store switch means for programming entry of data into successive ones of said plurality of shift registers in response to successive actuations of said store switch means, means responsive to connection of said keyboard unit to said computer for connecting the serial output of said first of said plurality of shift registers to the serial input of the last of said plurality of said shift registeRs to permit the data stored in said memory means to be transmitted to said computer under computer control and to permit comparison and verification of the data, and indicating means energizable from said computer for indicating verification of the data.
Claim 5
Dependent Claim
470 words
A portable self-contained memory keyboard unit for storing data for subsequent transfer to computer comprising: a plurality of individually operable actuable data switch means, means connected with said data switch means for encoding the data represented by actuation of any of said data switch means, memory buffer means including a tens buffer and a units buffer, said memory buffer means having a set condition establishing a logic ''''1'''' output level, first and second steering gate means interconnecting said encoding means with said tens and units buffers respectively, display means, decode-driver means interconnecting said memory buffer means and said display means, power switching means for respectively energizing and deenergizing said decode-driver means and said display means in response to respective actuation and deactuation of any of said data switch means, steering control means having a reset condition opening said first steering gate means and closing said second steering gate means and responsive to operation of said data switch means for closing said first steering gate means and opening said second steering gate means a predetermined interval of time after deactuation of said data switch means, memory means including a plurality of shift registers capable of operating in a parallel data input mode and a serial data output mode, mode control means normally establishing said parallel data input mode and responsive to connection of said keyboard unit with said computer for establishing said serial data output mode, an operator actuable store switch means, memory control means responsive to actuation of said store switch means for entering a code word into a first of said plurality of shift registers and for entering the data contained in said memory buffer means at the tine of actuation of said store switch means into a second of said plurality of shift registers, means for setting said memory buffer means a predetermined interval of time after data entry and for resetting said steering control means a predetermined interval of time after setting of said memory buffer means, said memory control means including program counter means resettable from said mode control means upon connection of said keyboard unit with said computer, said program counter means being responsive to actuation of said store switch means for programming entry of data into successive ones of said plurality of said shift registers in response to successive actuations of said store switch means, means responsive to connection of said keyboard unit to said computer for connecting the serial output of said first of said plurality of shift register to the serial input of the last of said plurality of said shift registers to permit the data stored in said memory means to be transmitted to said computer under computer control and to permit comparison and verification of the data, and indicating means energizable from said computer for indicating verification of the data.
Claim 6
Dependent Claim
470 words
A portable self-contained memory keyboard unit for storing data for subsequent transfer to computer comprising: a plurality of individually operable actuable data switch means, means connected with said data switch means for encoding the data represented by actuation of any of said data switch means, memory buffer means including a tens buffer and a units buffer, said memory buffer means having a set condition establishing a logic ''''1'''' output level, first and second steering gate means interconnecting said encoding means with said tens and units buffers respectively, display means, decode-driver means interconnecting said memory buffer means and said display means, power switching means for respectively energizing and deenergizing said decode-driver means and said display means in response to respective actuation and deactuation of any of said data switch means, steering control means having a reset condition opening said first steering gate means and closing said second steering gate means and responsive to operation of said data switch means for closing said first steering gate means and opening said second steering gate means a predetermined interval of time after deactuation of said data switch means, memory means including a plurality of shift registers capable of operating in a parallel data input mode and a serial data output mode, mode control means normally establishing said parallel data input mode and responsive to connection of said keyboard unit with said computer for establishing said serial data output mode, an operator actuable store switch means, memory control means responsive to actuation of said store switch means for entering a code word into a first of said plurality of shift registers and for entering the data contained in said memory buffer means at the tine of actuation of said store switch means into a second of said plurality of shift registers, means for setting said memory buffer means a predetermined interval of time after data entry and for resetting said steering control means a predetermined interval of time after setting of said memory buffer means, said memory control means including program counter means resettable from said mode control means upon connection of said keyboard unit with said computer, said program counter means being responsive to actuation of said store switch means for programming entry of data into successive ones of said plurality of said shift registers in response to successive actuations of said store switch means, means responsive to connection of said keyboard unit to said computer for connecting the serial output of said first of said plurality of shift register to the serial input of the last of said plurality of said shift registers to permit the data stored in said memory means to be transmitted to said computer under computer control and to permit comparison and verification of the data, and indicating means energizable from said computer for indicating verification of the data.
References Cited (Backward Citations)
US3248700A
Cited
US3312953A
Cited
US3372379A
Cited
US3465296A
Cited
US3389381A
Cited
US3553445A
Cited
US3541519A
Cited
US3541527A
Cited
US3576433A
Cited
US3575589A
Cited
US3623082A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |