Patent US3674951A successfully refreshed from Google Patents.
US3674951A
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: 1972-07-04
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Expires: 1991-02-19
Abstract
Abstract A trigger switch mechanism for actuating motor vehicle safety devices responsively to deceleration of a given magnitude resulting from a collision of the motor vehicle. The mechanism comprises a cylinder mounted on the vehicle body in a horizontal manner with a cylindrical weight mounted within the cylinder chamber for axial movement so that when the trigger switch mechanism is subjected to deceleration of a given magnitude in the one direction, a force of inertia forces the cylindrical weight to move axially in the opposite direction, allowing an actuator pin to extend so that a micro-switch is closed.
Inventors
- 👤 Takashi Haruna
- 👤 Kazutaka Taniguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:29
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
331 words
In a trigger switch mechanism for sensing deceleration of a given magnitude resulting from a collision of the motor vehicle To actuate safety device mounted thereon, the improvement comprising a base member made of resilient material and mounted at a suitable position of the vehicle body of said motor vehicle, a cylinder placed on said base member in a horizontal manner and secured thereto, said cylinder having a cylinder chamber therein, a cylindrical weight mounted within said cylinder chamber with a suitable clearance for axial movement, said cylindrical weight having a cylindrical recess formed in one end and a projection axially extending from the other end and extending through an opening formed in the surface of said cylinder, a coil spring for urging said cylindrical weight axially in one direction, a circular pedestal secured to the end of said cylinder and having a spring support attached thereto by an adjusting screw which adjusts the force of compression of said coil spring, said coil spring being mounted at one end in said cylindrical recess of said cylindrical weight and at the other end to said spring support, the force of compression of said coil spring being of such a magnitude as to permit said cylindrical weight to move axially in the opposite direction when the present trigger switch mechanism is subjected to deceleration of a given magnitude in one direction, and a switch assembly mounted on said cylinder and responsive to movement of said cylindrical weight in the opposite direction to make a circuit leading to said safety devices for thereby actuating said safety devices, said switch assembly including a mounting plate attached to the end surface of said cylinder, a U-shaped bracket anchored at its ends to said mounting plate, and a micro-switch having an actuator pin which is normally depressed by the projection extending from said cylindrical weight in the one direction and which is movable to its extended position upon movement of said cylindrical weight in the opposite direction.
Claim 2
Dependent Claim
331 words
In a trigger switch mechanism for sensing deceleration of a given magnitude resulting from a collision of the motor vehicle To actuate safety device mounted thereon, the improvement comprising a base member made of resilient material and mounted at a suitable position of the vehicle body of said motor vehicle, a cylinder placed on said base member in a horizontal manner and secured thereto, said cylinder having a cylinder chamber therein, a cylindrical weight mounted within said cylinder chamber with a suitable clearance for axial movement, said cylindrical weight having a cylindrical recess formed in one end and a projection axially extending from the other end and extending through an opening formed in the surface of said cylinder, a coil spring for urging said cylindrical weight axially in one direction, a circular pedestal secured to the end of said cylinder and having a spring support attached thereto by an adjusting screw which adjusts the force of compression of said coil spring, said coil spring being mounted at one end in said cylindrical recess of said cylindrical weight and at the other end to said spring support, the force of compression of said coil spring being of such a magnitude as to permit said cylindrical weight to move axially in the opposite direction when the present trigger switch mechanism is subjected to deceleration of a given magnitude in one direction, and a switch assembly mounted on said cylinder and responsive to movement of said cylindrical weight in the opposite direction to make a circuit leading to said safety devices for thereby actuating said safety devices, said switch assembly including a mounting plate attached to the end surface of said cylinder, a U-shaped bracket anchored at its ends to said mounting plate, and a micro-switch having an actuator pin which is normally depressed by the projection extending from said cylindrical weight in the one direction and which is movable to its extended position upon movement of said cylindrical weight in the opposite direction.
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |