US3311779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indicating lamp circuit for the failure of head lamp circuit
Assignee: Individual
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Filing: 1964-03-19
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Granted: 1967-03-28
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Expires: 1984-03-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Heinrich Hartkorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:08
CPC Classifications
H; H02; H02H; H02H1/00; H02H1/0007; H02H1/003; B; B60; B60Q; B60Q11/00; B60Q11/005; G; G08; G08B; G08B21/00; H05; H05B; H05B39/00; H05B39/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
IN AN AUTOMOBILE HAVING A HEAD LAMP CIRCUIT, AN IGNITION SYSTEM AND A BATTERY, AN IGNITION SWITCH FOR CONNECTING THE BATTERY WITH THE IGNITION SYSTEM, A HEAD LAMP SWITCH CONNECTING THE BATTERY WITH THE HEAD LAMP CIRCUIT, AN OSCILLATOR CONNECTED TO THE IGNITION SWITCH SO AS TO BE ENERGIZED INTO A CONDITION OF OSCILLATION UPON CLOSING OF THE IGNITION SWITCH, AN INDICATING CIRCUIT HAVING AN INDICATING LAMP THEREIN, A TRANSFORMER HAVING ONE WINDING CONNECTED ACROSS THE OSCILLATOR OUTPUT, A SECOND WINDING CONNECTED ACROSS SAID HEAD LAMP CIRCUIT ON THE SIDE OF SAID HEAD LAMP SWITCH OPPOSITE SAID BATTERY, AND A THIRD WINDING CONNECTED ACROSS SAID INDICATING CIRCUIT, AND SAID INDICATING CIRCUIT HAVING A HIGH IMPEDANCE AT THE OSCILLATOR FREQUENCY RELATIVE TO THE IMPEDANCE OF SAID HEAD LAMP CIRCUIT WHEREBY UNDER CONDITIONS OF CONTINUITY OF SAID HEAD LAMP CIRCUIT SAID INDICATING LAMP IS NOT ILLUMINATED, WHILE UNDER CONDITIONS OF INTERRUPTION OF SAID HEAD LAMP CIRCUIT SAID INDICATING LAMP IS ILLUMINATED.
Claim 2
Dependent Claim
159 words
IN AN AUTOMOBILE HAVING A HEAD LAMP CIRCUIT, AN IGNITION SYSTEM AND A BATTERY, AN IGNITION SWITCH FOR CONNECTING THE BATTERY WITH THE IGNITION SYSTEM, A HEAD LAMP SWITCH CONNECTING THE BATTERY WITH THE HEAD LAMP CIRCUIT, AN OSCILLATOR CONNECTED TO THE IGNITION SWITCH SO AS TO BE ENERGIZED INTO A CONDITION OF OSCILLATION UPON CLOSING OF THE IGNITION SWITCH, AN INDICATING CIRCUIT HAVING AN INDICATING LAMP THEREIN, A TRANSFORMER HAVING ONE WINDING CONNECTED ACROSS THE OSCILLATOR OUTPUT, A SECOND WINDING CONNECTED ACROSS SAID HEAD LAMP CIRCUIT ON THE SIDE OF SAID HEAD LAMP SWITCH OPPOSITE SAID BATTERY, AND A THIRD WINDING CONNECTED ACROSS SAID INDICATING CIRCUIT, AND SAID INDICATING CIRCUIT HAVING A HIGH IMPEDANCE AT THE OSCILLATOR FREQUENCY RELATIVE TO THE IMPEDANCE OF SAID HEAD LAMP CIRCUIT WHEREBY UNDER CONDITIONS OF CONTINUITY OF SAID HEAD LAMP CIRCUIT SAID INDICATING LAMP IS NOT ILLUMINATED, WHILE UNDER CONDITIONS OF INTERRUPTION OF SAID HEAD LAMP CIRCUIT SAID INDICATING LAMP IS ILLUMINATED.
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) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |