US4683403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dimmer passing device for headlamp of vehicle
Assignee: Mazda Motor Corp
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Filing: 1986-07-17
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Granted: 1987-07-28
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Expires: 2006-07-17
Abstract
Abstract There is provided a dimmer passing device for a headlamp of a vehicle having a light switch which drives a light relay when it is on, a momentary control switch which activates the light relay when it is on, a latch circuit which alternately turns on and off an internal switching element in response to the on state of the momentary control switch, and a dimmer relay which causes the light relay to energize a low beam of the headlamp when the internal switching element is turned off and which causes the light relay to energize a high beam of the headlamp when the internal switching element is turned on.
Inventors
- 👤 Tadashi Iwamoto
- 👤 Toshiki Ikeda
- 👤 Kazuo Yukitomo
- 👤 Masaichi Hattori
- 👤 Kaneyasu Arakawa
- 👤 Koichi Kihira
- 👤 Akira Hanaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:34
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/02; B60Q1/04; B60Q1/14; B60Q1/1415
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
235 words
A dimmer passing device for a headlamp of a vehicle comprising: a light switch operable selectively to an on and off state; a momentary control switch operable selectively to an on and off state; a light relay operative when driven for energizing one of a low beam portion and a high beam portion of said headlamp; first circuit means connecting said light relay to said light switch for activating said light relay in response to the on state of said light switch; second circuit means connecting said light relay to said momentary control switch for activating said light relay in response to the on state of said momentary control switch; latch circuit means including an internal switching element operative to alternately turn on and off said internal switching element in response to the on state of said momentary control switch; a dimmer relay operative to a first position for causing said light relay to energize said low beam portion and operative to a second position for causing said light relay to energize said high beam portion; and third circuit means for operating said dimmer relay to said second position at times when said internal switching element is in the on state, and for operating said light relay to energize said low beam portion at times when said dimmer relay is operated to said first position and said internal switching element is in the off state.
Claim 2
Dependent Claim
235 words
A dimmer passing device for a headlamp of a vehicle comprising: a light switch operable selectively to an on and off state; a momentary control switch operable selectively to an on and off state; a light relay operative when driven for energizing one of a low beam portion and a high beam portion of said headlamp; first circuit means connecting said light relay to said light switch for activating said light relay in response to the on state of said light switch; second circuit means connecting said light relay to said momentary control switch for activating said light relay in response to the on state of said momentary control switch; latch circuit means including an internal switching element operative to alternately turn on and off said internal switching element in response to the on state of said momentary control switch; a dimmer relay operative to a first position for causing said light relay to energize said low beam portion and operative to a second position for causing said light relay to energize said high beam portion; and third circuit means for operating said dimmer relay to said second position at times when said internal switching element is in the on state, and for operating said light relay to energize said low beam portion at times when said dimmer relay is operated to said first position and said internal switching element is in the off state.
Claim 3
Dependent Claim
43 words
A dimmer passing device for a headlamp of a vehicle as claimed in claim 1, wherein said latch circuit is connected to restore said internal switching element from an on state to an off state at times when said light relay is de-energized.
Claim 4
Dependent Claim
143 words
A dimmer passing device for a vehicle comprising: a headlamp having a first filament for a high beam of light and second filament for a low beam of light; a relay operative when driven for energizing one of said first filament and said second filament; switch means for driving said relay; momentary control switch means for driving said relay only at times when said momentary control switch means is turned on; a latch circuit having an internal switching element alternately turning on and off at times when said momentary control switch means is turned on; and dimmer relay means for actuating said first filament for said high-beam of light when said internal switching element is turned on and while said relay is on, and for actuating said second filament for said low beam of light when said internal switching element is turned off.
Claim 5
Dependent Claim
143 words
A dimmer passing device for a vehicle comprising: a headlamp having a first filament for a high beam of light and second filament for a low beam of light; a relay operative when driven for energizing one of said first filament and said second filament; switch means for driving said relay; momentary control switch means for driving said relay only at times when said momentary control switch means is turned on; a latch circuit having an internal switching element alternately turning on and off at times when said momentary control switch means is turned on; and dimmer relay means for actuating said first filament for said high-beam of light when said internal switching element is turned on and while said relay is on, and for actuating said second filament for said low beam of light when said internal switching element is turned off.
Claim 6
Dependent Claim
26 words
A dimmer passing device as claimed in claim 3, wherein said internal switching element of said latch circuit is turned off when said relay is de-energized.
References Cited (Backward Citations)
US2571981A
Cited
US3671802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-27 | 1991-01-26 | 1991-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-27 | 1995-01-26 | 1995-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-27 | 1999-01-26 | 1999-07-28 | $7700.00 | Window Closed / Lapsed |