Patent US3825797A successfully refreshed from Google Patents.
US3825797A
Expired / Lapsed
US
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Timing holding device for head lamp circuit
Assignee: Tokai Rika Co Ltd
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Filing: 1972-11-24
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Granted: 1974-07-23
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Expires: 1992-11-24
Abstract
Abstract A head lamp circuit of a motor car for lighting alternately upper and lower head lamps of the present device wherein, when, at night, on stopping and leaving his vehicle a driver turns the light switch off and the door switch on, the dimmer switch is momentarily switched to the upper headlamp holding position whereby the upper headlamp circuit is closed by the dimmer switch being momentarily switched to the upper headlamp holding position and held closed for a set time by a timed holding relay unit. Thus, if the vehicle is parked, for example, in a garage, the interior of the garage continues to be illuminated, which is of great convenience for persons leaving the garage.
Inventors
- 👤 T Maeda
- 👤 M Hattori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:50
CPC Classifications
B; B60; B60Q; B60Q9/00; B60Q9/001
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
198 words
A timing holding device for a head lamp circuit of a vehicle having first and second head lamp means which are arranged to be alternately lighted, the head lamp circuit including head lamp light switch means, light relay means responsive to the closing of the light switch means for closing contacts thereof, dimmer switch means having first, second and third positions, dimmer relay means responsive to the operation of the dimmer switch means from the first position to the second position thereof for moving change-over contacts thereof from a first position for energizing the first head lamp means to a second position for energizing the second head lamp means, the dimmer switch means being movable to the third position for providing an energizing circuit path for the light relay means and the dimmer relay means with the light switch means being open such that the second head lamp means are energized, and timing holding relay means responsive to the momentary movement of the dimmer switch means into the third position thereof for maintaining the light relay means energized for a predetermined period of time whereby the second head lamp means are energized for the predetermined period of time.
Claim 2
Dependent Claim
198 words
A timing holding device for a head lamp circuit of a vehicle having first and second head lamp means which are arranged to be alternately lighted, the head lamp circuit including head lamp light switch means, light relay means responsive to the closing of the light switch means for closing contacts thereof, dimmer switch means having first, second and third positions, dimmer relay means responsive to the operation of the dimmer switch means from the first position to the second position thereof for moving change-over contacts thereof from a first position for energizing the first head lamp means to a second position for energizing the second head lamp means, the dimmer switch means being movable to the third position for providing an energizing circuit path for the light relay means and the dimmer relay means with the light switch means being open such that the second head lamp means are energized, and timing holding relay means responsive to the momentary movement of the dimmer switch means into the third position thereof for maintaining the light relay means energized for a predetermined period of time whereby the second head lamp means are energized for the predetermined period of time.
Claim 3
Dependent Claim
35 words
A timing holding device according to claim 1, further comprising door switch means for the vehicle, the timing holding relay means being further responsive to the door switch means being closed for being initially energized.
Claim 4
Dependent Claim
65 words
A timing holding device according to claim 2, wherein the timing holding relay means includes condenser means for being charged in response to the dimmer switch means being moved to the third position with the light switch means being open, and a timing holding relay circuit energizing a timing relay for the predetermined period of time corresponding to the charging time of the condenser means.
Claim 5
Dependent Claim
72 words
A timing holding device according to claim 3, wherein the timing relay includes a self-holding contactor movable from a first position to a second position upon energization of the timing relay for providing an energizing circuit path for the timing relay such that the door switch means may be opened after initial energization of the timing relay and the timing relay will continue to be energized for the predetermined period of time.
Claim 6
Dependent Claim
79 words
A timing holding device according to claim 2, wherein the timing holding relay means includes a timing relay having a self-holding contactor movable from a first position to a second position upon energization of the timing relay means for providing an energizing circuit path for the timing relay such that the door switch means may be opened after initial energization of the timing relay and the timing relay will continue to be energized for the predetermined period of time.
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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |