US3211951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tail lamps
Assignee: —
•
Filing: —
•
Granted: 1965-10-12
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Expires: 1982-10-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:13
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/28; H03K17/288; B; B60; B60Q; B60Q9/00; B60Q9/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
AN AUTOMATIC HEADLAMP SWITCH CIRCUIT INCLUDING A HEADLAMP CIRCUIT HAVING SWITCH MEANS FOR CONNECTING HEADLAMPS TO A VEHICLE BATTERY, A CONTROL CIRCUIT FOR ACTUATING SAID SWITCH MEANS, A MANUALLY OPERATED SWITCH CONNECTING SAID CONTROL CIRCUIT TO SAID BATTERY, A TIME DELAY MEANS COMPRISING A VACUUM TUBE HAVING AN ANODE AND A CATHODE CONNECTED TO THE CONTROL CIRCUIT AND A FILAMENT TO HEAT THE CATHODE, THE TIME DELAY MEANS FURTHER COMPRISING MEANS RESPONSIVE TO OPENING OF THE MANUALLY OPERATED SWITCH TO APPLY A VOLTAGE ACROSS THE FILAMENT FOR CAUSING VACUUM TUBE CURRENT FLOW TO THE CONTROL CIRCUIT AND FOR ENABLING THE CONTROL CIRCUIT TO OPEN SAID SWITCH MEANS A PREDETERMINED TIME AFTER OPENING OF SAID MANUALLY OPERATED SWITCH.
Claim 2
Dependent Claim
117 words
AN AUTOMATIC HEADLAMP SWITCH CIRCUIT INCLUDING A HEADLAMP CIRCUIT HAVING SWITCH MEANS FOR CONNECTING HEADLAMPS TO A VEHICLE BATTERY, A CONTROL CIRCUIT FOR ACTUATING SAID SWITCH MEANS, A MANUALLY OPERATED SWITCH CONNECTING SAID CONTROL CIRCUIT TO SAID BATTERY, A TIME DELAY MEANS COMPRISING A VACUUM TUBE HAVING AN ANODE AND A CATHODE CONNECTED TO THE CONTROL CIRCUIT AND A FILAMENT TO HEAT THE CATHODE, THE TIME DELAY MEANS FURTHER COMPRISING MEANS RESPONSIVE TO OPENING OF THE MANUALLY OPERATED SWITCH TO APPLY A VOLTAGE ACROSS THE FILAMENT FOR CAUSING VACUUM TUBE CURRENT FLOW TO THE CONTROL CIRCUIT AND FOR ENABLING THE CONTROL CIRCUIT TO OPEN SAID SWITCH MEANS A PREDETERMINED TIME AFTER OPENING OF SAID MANUALLY OPERATED 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) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |