US4897807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switch data input device
Assignee: Canon Inc
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Filing: 1987-12-31
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Granted: 1990-01-30
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Expires: 2007-12-31
Abstract
Abstract A switch data input device includes a plurality of switches, an interrupt signal generating circuit responsive to on and off states of the respective switches for producing an interrupt signal having a prescribed pulse width, and a data processing circuit receptive of the interrupt signal and responsive to presence of the interrupt signal for reading the on and off states of the respective switches as data and having a program for executing a processing according to the read data, wherein after the completion of execution of the data reading and data processing, the data processing circuit comes into a waiting state.
Inventors
- 👤 Toshifumi Ohsawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:54
CPC Classifications
G; G06; G06F; G06F1/00; G06F1/26; G06F1/32; G06F1/3203; G06F1/3206; G06F1/3215; H; H04; H04N; H04N23/00; H04N23/60; H04N23/67
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
114 words
A switch data input device comprising: a plurality of switches, each having an on-state and an off-state; interrupt signal generating means responsive to the on-state of said respective switches for producing an interrupt signal having a prescribed pulse width duration shorter than the time width of the on-state; and, data processing circuit means, receptive of said interrupt signal and responsive to presence of the interrupt signal, for reading the on-state and the off-state of said respective switches as data, and having a program for executing a processing operation according to the read data, said data processing circuit reverting to a waiting state after completion of execution of the data reading and data processing operations.
Claim 2
Dependent Claim
114 words
A switch data input device comprising: a plurality of switches, each having an on-state and an off-state; interrupt signal generating means responsive to the on-state of said respective switches for producing an interrupt signal having a prescribed pulse width duration shorter than the time width of the on-state; and, data processing circuit means, receptive of said interrupt signal and responsive to presence of the interrupt signal, for reading the on-state and the off-state of said respective switches as data, and having a program for executing a processing operation according to the read data, said data processing circuit reverting to a waiting state after completion of execution of the data reading and data processing operations.
Claim 3
Dependent Claim
47 words
A switch data input device, according to claim 1, wherein said interrupt signal generating means includes a binary logic circuit which is set in response to said respective switches coming into the on-state and reset by a signal applied before completion of the on-state of said switches.
Claim 4
Dependent Claim
18 words
A switch data input device according to claim 2, wherein said binary logic circuit includes a flip-flop circuit.
Claim 5
Dependent Claim
28 words
A switch data input device according to claim 3, wherein said flip-flop circuit includes a D type flip-flop circuit having an input terminal connected to a corresponding switch.
Claim 6
Dependent Claim
116 words
A switch data input device comprising: a plurality of manually operable switches, each having a first state for setting data and a second state different from said first state; means for generating a control signal having a pulse width duration shorter than the time width of said first state of said respective switches in response to said first state; and data processing circuit means, responsive to the control signal for reading the state of each of said switches as data, and having a program for executing a processing operation according to the read data, said data processing circuit means reverting to a waiting state after completion of execution of the data reading and data processing operations.
Claim 7
Dependent Claim
116 words
A switch data input device comprising: a plurality of manually operable switches, each having a first state for setting data and a second state different from said first state; means for generating a control signal having a pulse width duration shorter than the time width of said first state of said respective switches in response to said first state; and data processing circuit means, responsive to the control signal for reading the state of each of said switches as data, and having a program for executing a processing operation according to the read data, said data processing circuit means reverting to a waiting state after completion of execution of the data reading and data processing operations.
Claim 8
Dependent Claim
27 words
A switch data input device according to claim 5, wherein said second state of each of said switches is a state in which data are not set.
Claim 9
Dependent Claim
110 words
A switch data input device comprising: at least one manually operable switch having a first state for setting data and a second state different from said first state; means for generating a control signal having a pulse width duration shorter than the time width of first state of said switch in response the first state; and data processing circuit means, responsive to the control signal for reading the state of the switch as data, and having a program for executing a processing operation according to the read data, said data processing circuit means reverting to a waiting state after completion of execution of the data reading and data processing operations.
Claim 10
Dependent Claim
110 words
A switch data input device comprising: at least one manually operable switch having a first state for setting data and a second state different from said first state; means for generating a control signal having a pulse width duration shorter than the time width of first state of said switch in response the first state; and data processing circuit means, responsive to the control signal for reading the state of the switch as data, and having a program for executing a processing operation according to the read data, said data processing circuit means reverting to a waiting state after completion of execution of the data reading and data processing operations.
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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) | 1993-01-29 | 1993-07-31 | 1994-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-29 | 1997-07-31 | 1998-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-29 | 2001-07-31 | 2002-01-30 | $7700.00 | Window Closed / Lapsed |