Patent US3639710A successfully refreshed from Google Patents.
US3639710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trigger switch for motor vehicle safety devices
Assignee: Nissan Motor Co Ltd
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Filing: 1971-02-19
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Granted: 1972-02-01
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Expires: 1991-02-19
Abstract
Abstract A trigger switch mechanism for motor vehicle safety devices which senses deceleration of a given magnitude resulting from a collision of the motor vehicle in order to actuate the safety devices. The mechanism comprises an upright cylinder within which an electrically conductive rockable weight is normally kept aligned with respect to the surrounding cylinder in a depending manner by a rodlike spring and a coiled spring. An arcuate contact is provided on the inner wall of the upright cylinder in front of the rockable weight at a suitable space therefrom. An arcuate damper is also provided on the inner wall of the upright cylinder opposite to the arcuate contact in such a manner as to partially surround the rockable weight thereby serving to absorb the usual shocks and vibrations of the rockable weight developed during operation of the vehicle. In operation, if the trigger switch mechanism is subjected to deceleration of a given magnitude resulting from a collision, then the rockable weight swings and strikes against the arcuate contact, thereby establishing an electrical connection therebetween.
Inventors
- 👤 Takashi Haruna
- 👤 Akira Shimano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:27
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/60; H01H35/00; H01H35/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
201 words
A trigger switch mechanism for sensing deceleration of a given magnitude resulting from a collision of the motor vehicle to actuate safety devices mounted thereon, said mechanism comprising: a base member, a cylindrical member mounted on said base member in an upright manner, a plate member mounted atop said cylindrical member, a rodlike spring anchored at its uppermost end to said plate member, an electrically conductive rockable weight carried by said rodlike spring and having a recessed control portion formed in its lower end surface, a ball member held in said recessed control portion by a regulated spring action, a coiled spring holding said ball member in said recessed control portion, a contact member provided on the inner wall of said cylindrical member in front of said rockable weight at a suitable space therefrom, and a damping member provided on the inner wall of said cylindrical member opposite to said contact member for partially surrounding said rockable weight thereby serving to absorb the usual shocks and vibrations of said rockable weight developed during operation of the motor vehicle, said rockable weight being forced forwardly coming into contact with said contact member when said trigger switch mechanism is subjected to said deceleration.
Claim 2
Dependent Claim
201 words
A trigger switch mechanism for sensing deceleration of a given magnitude resulting from a collision of the motor vehicle to actuate safety devices mounted thereon, said mechanism comprising: a base member, a cylindrical member mounted on said base member in an upright manner, a plate member mounted atop said cylindrical member, a rodlike spring anchored at its uppermost end to said plate member, an electrically conductive rockable weight carried by said rodlike spring and having a recessed control portion formed in its lower end surface, a ball member held in said recessed control portion by a regulated spring action, a coiled spring holding said ball member in said recessed control portion, a contact member provided on the inner wall of said cylindrical member in front of said rockable weight at a suitable space therefrom, and a damping member provided on the inner wall of said cylindrical member opposite to said contact member for partially surrounding said rockable weight thereby serving to absorb the usual shocks and vibrations of said rockable weight developed during operation of the motor vehicle, said rockable weight being forced forwardly coming into contact with said contact member when said trigger switch mechanism is subjected to said deceleration.
Claim 3
Dependent Claim
19 words
A trigger switch mechanism according to claim 1, in which said cylindrical member is made of electrically nonconductive material.
Claim 4
Dependent Claim
19 words
A trigger switch mechanism according to claim 1, in which said plate member is made of electrically conductive material.
Claim 5
Dependent Claim
19 words
A trigger switch mechanism according to claim 1, in which said rodlike spring is made of electrically conductive material.
Claim 6
Dependent Claim
30 words
A trigger switch mechanism according to claim 1, in which said rockable weight is of generally cylindrical construction and said contact member and damping member are in an arcuate shape.
Claim 7
Dependent Claim
22 words
A trigger switch mechanism according to claim 5, in which said contact member is positioned concentrically with respect to said rockable weight.
Claim 8
Dependent Claim
27 words
A trigger switch mechanism according to claim 1, in which said base member has a cylindrical recess therein and said coiled spring is mounted in said recess.
Claim 9
Dependent Claim
32 words
A trigger switch mechanism according to claim 7, in which an adjustment screw is provided at a bottom of said base member for adjusting the force of compression of said coiled spring.
Claim 10
Dependent Claim
19 words
A trigger switch mechanism according to claim 1, in which said damping member is made of electrically nonconductive material.
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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |