Patent US3088051A successfully refreshed from Google Patents.
US3088051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light sensitive unit
Assignee: Individual
•
Filing: 1960-08-22
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Granted: 1963-04-30
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Expires: 1980-08-22
Abstract
No abstract record available.
Inventors
- 👤 Scanlon Thomas Aloysius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:02
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/26; B60Q1/48; B60Q1/486
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
APPARATUS FOR AUTOMATICALLY ENERGIZING AN ELECTRICAL CIRCUIT IN RESPONSE TO A PREDETERMINED DROP IN AMBIENT LIGHTING, COMPRISING: A SOURCE OF D.C. VOLTAGE; A CIRCUIT TO BE ENERGIZED CONNECTED ACROSS SAID SOURCE AND INCLUDING A NORMALLY CLOSED ELECTRICALLY CONTROLLED SWITCH; AND MEANS ENERGIZED BY SAID SOURCE FOR OPENING SAID SWITCH INCLUDING A TRANSISTOR HAVING A BASE, EMITTER AND COLLECTOR, AND A SOLENOID OPERATIVELY CONNECTED TO SAID SWITCH, SAID SOLENOID AND THE EMITTER AND COLLECTOR OF SAID TRANSISTOR BEING CONNECTED IN SERIES ACROSS SAID SOURCE, A RESISTIVE VOLTAGE DIVIDER NETWORK ALSO CONNECTED ACROSS SAID SOURCE AND A LIGHT SENSITIVE RESISTOR CONNECTED BETWEEN A POINT ON SAID VOLTAGE DIVIDER NETWORK AND THE BASE OF SAID TRANSISTOR WHEREBY IN RESPONSE TO A PREDETERMINED LOWERED LEVEL OF AMBIENT LIGHT, SAID TRANSISTOR IS FORWARDLY BIASED TO ENERGIZE SAID SOLENOID AND HOLD SAID SWITCH IN OPEN POSITION.
Claim 2
Dependent Claim
140 words
APPARATUS FOR AUTOMATICALLY ENERGIZING AN ELECTRICAL CIRCUIT IN RESPONSE TO A PREDETERMINED DROP IN AMBIENT LIGHTING, COMPRISING: A SOURCE OF D.C. VOLTAGE; A CIRCUIT TO BE ENERGIZED CONNECTED ACROSS SAID SOURCE AND INCLUDING A NORMALLY CLOSED ELECTRICALLY CONTROLLED SWITCH; AND MEANS ENERGIZED BY SAID SOURCE FOR OPENING SAID SWITCH INCLUDING A TRANSISTOR HAVING A BASE, EMITTER AND COLLECTOR, AND A SOLENOID OPERATIVELY CONNECTED TO SAID SWITCH, SAID SOLENOID AND THE EMITTER AND COLLECTOR OF SAID TRANSISTOR BEING CONNECTED IN SERIES ACROSS SAID SOURCE, A RESISTIVE VOLTAGE DIVIDER NETWORK ALSO CONNECTED ACROSS SAID SOURCE AND A LIGHT SENSITIVE RESISTOR CONNECTED BETWEEN A POINT ON SAID VOLTAGE DIVIDER NETWORK AND THE BASE OF SAID TRANSISTOR WHEREBY IN RESPONSE TO A PREDETERMINED LOWERED LEVEL OF AMBIENT LIGHT, SAID TRANSISTOR IS FORWARDLY BIASED TO ENERGIZE SAID SOLENOID AND HOLD SAID SWITCH IN OPEN POSITION.
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) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |