US4232236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Output converting circuit for a programmable sequence controller
Assignee: Toyoda Koki KK
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Filing: 1979-01-16
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Granted: 1980-11-04
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Expires: 1999-01-16
Abstract
Abstract An output circuit for a programmable sequence controller wherein a load drive element control circuit is responsive to a command signal stored in a memory circuit for controlling a load drive element connected between a load and a first electric supply. Between a power input terminal of the load drive element control circuit and a second electric supply, there is connected in series a switching element, which is switched on in response to a signal applied from a supply voltage detecting circuit only when the voltage level of the second electric supply is not lower than a level sufficient for normal and reliable operation of the load drive element control circuit.
Inventors
- 👤 Toshihiko Yomogida
- 👤 Yasuo Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:40
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/05; G05B19/058; H; H03; H03K; H03K17/00; H03K17/22; G05B2219/00; G05B2219/10; G05B2219/11; G05B2219/1173; G05B2219/20; G05B2219/21; G05B2219/21151; H03K2017/226
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
171 words
An output converting circuit for a programmable sequence controller wherein, in accordance with a sequence control program, the operational state of an input element is tested so as to generate a command signal to energize or deenergize a load based upon the result of the test, comprising: a memory circuit for storing said command signal; a load drive element connected between said load and a first electric supply; a load drive element control circuit responsive to said command signal stored in said memory circuit for controlling said load drive element; a switching element connected in series between a power input terminal of said load drive element control circuit and a second electric supply; and a supply voltage detecting circuit for detecting a voltage level of said second electric supply so as to output a signal to enable said switching element to switch on only when the voltage level of said second electric supply is not lower than a predetermined level sufficient for normal operation of said load drive element control circuit.
Claim 2
Dependent Claim
171 words
An output converting circuit for a programmable sequence controller wherein, in accordance with a sequence control program, the operational state of an input element is tested so as to generate a command signal to energize or deenergize a load based upon the result of the test, comprising: a memory circuit for storing said command signal; a load drive element connected between said load and a first electric supply; a load drive element control circuit responsive to said command signal stored in said memory circuit for controlling said load drive element; a switching element connected in series between a power input terminal of said load drive element control circuit and a second electric supply; and a supply voltage detecting circuit for detecting a voltage level of said second electric supply so as to output a signal to enable said switching element to switch on only when the voltage level of said second electric supply is not lower than a predetermined level sufficient for normal operation of said load drive element control circuit.
Claim 3
Dependent Claim
79 words
An output converting circuit as set forth in claim 1, wherein said supply voltage detecting circuit comprises: a first circuit for generating a detection signal when the supply voltage of said second electric supply rises to said predetermined voltage level; and a second circuit coupled to said first circuit for squaring the rise of said detection signal output from said first circuit, said switching element being switched on based upon a squared detection signal output from said second circuit.
Claim 4
Dependent Claim
41 words
An output converting circuit as set forth in claim 2, wherein said supply voltage detecting circuit further comprises: a third circuit connected between said second circuit and said switching element for inverting said squared detection signal applied to said switching element.
Claim 5
Dependent Claim
47 words
An output converting circuit as set forth in claim 2 or 3, wherein said memory circuit comprises: a flip flop circuit having a compulsory reset terminal connected to said second circuit for being compulsorily reset in response to said squared detection signal output from said second circuit.
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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) | 1983-11-04 | 1984-05-05 | 1984-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-04 | 1988-05-05 | 1988-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-04 | 1992-05-05 | 1992-11-04 | $7700.00 | Window Closed / Lapsed |