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Patent US3231747A successfully refreshed from Google Patents.
US3231747A
Expired / Lapsed
US
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Photoelectric self-correcting timing device for turning on and off electric devices
Assignee: Mitsubishi Electric Corp
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Filing: 1962-02-14
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Granted: 1966-01-25
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Expires: 1982-02-14
Abstract
No abstract record available.
Inventors
- 👤 Takeda Katsumi
- 👤 Kaminoto Akiteru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:31
CPC Classifications
G; G04; G04C; G04C23/00; G04C23/14; G04C23/34; G04C23/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A SYSTEM FOR AUTTOMATICALLY TURNING ON AND OFF A DEVICE AT SUNRISE, SUNSET AND PREDETERMINED TIMES COMPRISING, DRIVING ROTARY MEANS HAVING A PREDETERMINED FIXED SPEED OR ROTATION, MEANS RESPONSIVE TO BOTH SUNRISE AND SUNSET INCLUDING MEANS FOR STARTING OPERATION OF SAID DRIVING MEANS AT SUNRISE AND FOR EFFECTING OPENING AND CLOSING OF AN ENERGIZATION CIRCUIT FOR THE DEVICE AT SUNRISE AND SUNSET RESPECTIVELY, SPEED CHANGING MEANS, CONTROLLING AN HOUR INDICATING MEANS INCLUDING A GRADUATED MEMBER DRIVEN BY SAID DRIVEN MEANS THROUGH SAID SPEED CHANGING MEANS, MEANS FOR CONTROLLING SAID SPEED CHANGING MEANS BY SAID SUNRISE AND SUNSET RESPONSIVE MEANS TO CHANGE THE ANGULAR SPEED OF SAID GRADUATE MEMBER FROM A PREDETERMINED MAGNITUDE OF ANGULAR SPEED OF OPERATION DURING THE TIME INTERVAL BETWEEN SUNRISE AND SUNSET TO TWICE SAID PREDETERMINED MAGNITUDE OF ANGULAR
Claim 2
Independent Claim
132 words
A SYSTEM FOR AUTTOMATICALLY TURNING ON AND OFF A DEVICE AT SUNRISE, SUNSET AND PREDETERMINED TIMES COMPRISING, DRIVING ROTARY MEANS HAVING A PREDETERMINED FIXED SPEED OR ROTATION, MEANS RESPONSIVE TO BOTH SUNRISE AND SUNSET INCLUDING MEANS FOR STARTING OPERATION OF SAID DRIVING MEANS AT SUNRISE AND FOR EFFECTING OPENING AND CLOSING OF AN ENERGIZATION CIRCUIT FOR THE DEVICE AT SUNRISE AND SUNSET RESPECTIVELY, SPEED CHANGING MEANS, CONTROLLING AN HOUR INDICATING MEANS INCLUDING A GRADUATED MEMBER DRIVEN BY SAID DRIVEN MEANS THROUGH SAID SPEED CHANGING MEANS, MEANS FOR CONTROLLING SAID SPEED CHANGING MEANS BY SAID SUNRISE AND SUNSET RESPONSIVE MEANS TO CHANGE THE ANGULAR SPEED OF SAID GRADUATE MEMBER FROM A PREDETERMINED MAGNITUDE OF ANGULAR SPEED OF OPERATION DURING THE TIME INTERVAL BETWEEN SUNRISE AND SUNSET TO TWICE SAID PREDETERMINED MAGNITUDE OF ANGULAR
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |