Patent US4080575A successfully refreshed from Google Patents.
US4080575A
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Electronic time signalling device
Assignee: TOKYO JIHOKI Manufacturing CO Ltd
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Filing: 1976-11-03
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Granted: 1978-03-21
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Expires: 1996-11-03
Abstract
Abstract A time signalling device which includes a clock for generating an actual time signal, a time preset circuit for presetting a time to be signalled, a comparator for comparing the actual time with the preset time and producing an output signal when coincidence occurs.
Inventors
- 👤 Shigenobu Miki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:58
CPC Classifications
G; G04; G04G; G04G15/00; G04G15/003
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
122 words
A time signalling device, comprising a clock circuit for producing a binary signal representing the actual time, a timing signal designating the respective digits of said binary signal and a driving signal synchronous with said timing signal, a plurality of time presetting devices each producing a decimal signal representing a time previously stored therein upon actuation means for actuating said time setting devices sequentially in time division fashion under control of said driving signal, a common decimal-binary converter for converting said decimal signals into binary signals, a comparator circuit for comparing said binary signal representing the actual time with the output of said converter under control of said timing signal, and signalling means driven by the coincidence output of said comparator circuit.
Claim 2
Dependent Claim
122 words
A time signalling device, comprising a clock circuit for producing a binary signal representing the actual time, a timing signal designating the respective digits of said binary signal and a driving signal synchronous with said timing signal, a plurality of time presetting devices each producing a decimal signal representing a time previously stored therein upon actuation means for actuating said time setting devices sequentially in time division fashion under control of said driving signal, a common decimal-binary converter for converting said decimal signals into binary signals, a comparator circuit for comparing said binary signal representing the actual time with the output of said converter under control of said timing signal, and signalling means driven by the coincidence output of said comparator circuit.
Claim 3
Dependent Claim
54 words
A time signalling device, according to claim 1, wherein said time presetting devices each includes at least one digital switch for feeding in said time to be signalled in decimal coded form to said decimal-binary converter for converting said input decimal-coded time into a plurality of binary codes corresponding respectively to said respective digits.
Claim 4
Dependent Claim
60 words
A time signalling device, according to claim 1, wherein said clock circuit generates clock pulses having a predetermined frequency and said signalling means includes a load driving circuit, a counter for counting said clock pulses and means actuated by said coincidence signal to produce said load driving signal and deactuated when the count of said counter reaches a predetermined value.
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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) | 1981-03-20 | 1981-09-19 | 1982-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-20 | 1985-09-19 | 1986-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-20 | 1989-09-19 | 1990-03-21 | $7700.00 | Window Closed / Lapsed |