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US4438431A
Expired / Lapsed
US
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Electronic device having warning means
Assignee: Canon Inc
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Filing: 1981-05-12
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Granted: 1984-03-20
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Expires: 2001-05-12
Abstract
Abstract An electronic appliance provided with an output section to produce, as an output, input data introduced from an input section an operational result of the input data, and a power source section to supply electric power to the output section, wherein the appliance is further provided with a detection device for detecting abnormality in the output operation of the output section based on a decrease in the power supply from the power source section or an abnormality in the output operation of the output section based on the power decrease, thereby inhibiting data input from the input section when the decrease in the power or the abnormality is detected.
Inventors
- 👤 Shigeru Toyomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:50
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/60; H02J7/663; G; G06; G06F; G06F1/00; G06F1/26; G06F1/30; G06F11/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
153 words
An electronic device for producing a warning comprising: key input means for introducing data signals as input data into said electronic device, said key input means including a clear-key for introducing a clear-signal into said electronic device to clear the input data; printing means for printing an output related to the input data in said key input means; power source means for supplying electric power to said printing means; detection means for detecting an output related to the electric power supplied from said power source means, and for generating a signal based on the detection; and means for inhibiting data input from said key input means into said printing means upon receipt of the detection signal from said detection means, wherein said inhibiting means includes a plurality of gate circuits which prevent said key input means from introducing data signals when said inhibiting means is receiving the detection signal from said detection means.
Claim 2
Dependent Claim
153 words
An electronic device for producing a warning comprising: key input means for introducing data signals as input data into said electronic device, said key input means including a clear-key for introducing a clear-signal into said electronic device to clear the input data; printing means for printing an output related to the input data in said key input means; power source means for supplying electric power to said printing means; detection means for detecting an output related to the electric power supplied from said power source means, and for generating a signal based on the detection; and means for inhibiting data input from said key input means into said printing means upon receipt of the detection signal from said detection means, wherein said inhibiting means includes a plurality of gate circuits which prevent said key input means from introducing data signals when said inhibiting means is receiving the detection signal from said detection means.
Claim 3
Dependent Claim
27 words
The electronic device according to claim 1, wherein said electronic device includes display means for displaying data related to the input data from said key input means.
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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) | 1987-03-20 | 1987-09-19 | 1988-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-20 | 1991-09-19 | 1992-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-20 | 1995-09-19 | 1996-03-20 | $7700.00 | Window Closed / Lapsed |