Patent US3325680A successfully refreshed from Google Patents.
US3325680A
Expired / Lapsed
US
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Automatic headlight dimming system for interrupting the connection of the voltage source to the bright filaments only
Assignee: Individual
•
Filing: 1964-10-01
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Granted: 1967-06-13
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Expires: 1984-10-01
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Amacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:44
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/02; B60Q1/04; B60Q1/14; B60Q1/1415; B60Q1/1423; B60Q2300/00; B60Q2300/20; B60Q2300/21; B60Q2300/40; B60Q2300/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
AN AUTOMATIC VEHICLE HEADLIGHT DIMMER CONTROL SYSTEM COMPRISING A VOLTAGE SOURCE, "BRIGHT" AND "DIM" HEADLIGHT FILAMENTS, A LIGHT SENSITIVE DEVICE RESPONSIVE TO CHANGES IN INCIDENT LIGHT RECEIVED THEREBY, AMPLIFIER MEANS FOR AMPLIFYING ELECTRICAL VARIATIONS IN SAID LIGHT SENSITIVE DEVICE, GATE MEANS RESPONSIVE TO THE OUTPUT OF SAID AMPLIFIER MEANS, CIRCUIT CONNECTION MEANS FOR CONNECTING SAID VOLTAGE SOURCE TO SAID "BRIGHT" AND "DIM" HEADLIGHT FILAMENTS, SOLID STATE SWITCH MEANS IN SAID CIRCUIT
Claim 2
Dependent Claim
71 words
AN AUTOMATIC VEHICLE HEADLIGHT DIMMER CONTROL SYSTEM COMPRISING A VOLTAGE SOURCE, "BRIGHT" AND "DIM" HEADLIGHT FILAMENTS, A LIGHT SENSITIVE DEVICE RESPONSIVE TO CHANGES IN INCIDENT LIGHT RECEIVED THEREBY, AMPLIFIER MEANS FOR AMPLIFYING ELECTRICAL VARIATIONS IN SAID LIGHT SENSITIVE DEVICE, GATE MEANS RESPONSIVE TO THE OUTPUT OF SAID AMPLIFIER MEANS, CIRCUIT CONNECTION MEANS FOR CONNECTING SAID VOLTAGE SOURCE TO SAID "BRIGHT" AND "DIM" HEADLIGHT FILAMENTS, SOLID STATE SWITCH MEANS IN SAID CIRCUIT
References Cited (Backward Citations)
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Cited
US2959709A
Cited
US3219910A
Cited
US3209154A
Cited
US3253163A
Cited
US3225341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-12 | 1970-12-12 | 1971-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-12 | 1974-12-12 | 1975-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-12 | 1978-12-12 | 1979-06-13 | $7700.00 | Window Closed / Lapsed |