US3240960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric lighting control
Assignee: Individual
•
Filing: 1962-10-05
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Granted: 1966-03-15
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Expires: 1982-10-05
Abstract
No abstract record available.
Inventors
- 👤 Lewis J Woodward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:47
CPC Classifications
G; G04; G04C; G04C23/00; G04C23/14; G04C23/34; G04C23/36; H; H01; H01H; H01H37/00; H01H37/02; H01H37/32
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
144 words
A DEVICE FOR THE DAILY CONTROL OF AN OUTDOOR SIGN, INCLUDING MEANS TO RECEIVE A POWER SOURCE, A LOAD AND CIRCUITRY CONNECTING SAID SOURCE TO SAID LOAD, THAT IMPROVEMENT COMPRISING A FIST NORMALLY OPEN PHOTO-ELECTRIC SWITCH FOR INTERRUPTING SAID CIRCUIT BETWEEN SAID LOAD AND SAID SOURCE WHEN SAID SWITCH IS SUBJECT TO ILLUMINATION AND FOR CLOSING SAID FIRST SWITCH UPON A DECREASE IN ILLUMINATION, A HEATING UNIT RECEIVING CURRENT WHEN SAID FIRST SWITCH IS CLOSED, A BI-METAL DISPOSED ADJACENT SAID HEATING UNIT, A NORMALLY CLOSED SECOND SWITCH BETWEEN SAID FIRST SWITCH AND SAID LOAD, A TIMER UNIT, A ROTATING GEAR OUTPUT DEPENDING FROM SAID TIMER UNIT, A MATING GEAR DISPOSED ADJACENT SAID ROTATING GEAR, MEANS ACTUATED BY THE HEATING OF SAID BI-METAL FOR MESHING SAID ROTATING GEAR WITH SAID MATING GEAR, AND A LINKAGE ROTATABLE WITH SAID MATING GEAR FOR OPENING SAID SECOND SWITCH.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |