US3814875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pendulum operated inertia switch for safety belt mechanism with reciprocating cam follower
Assignee: Takata Kogyo Co Ltd
•
Filing: 1973-04-09
•
Granted: 1974-06-04
•
Expires: 1993-04-09
Abstract
Abstract The inertia switch includes a vertical tubular member terminating at its bottom in an apertured spherical seat which swingably engages the spherical underface of a head formed at the top of a depending pendulum. The top of the head defines a flat faced cam which confronts the flat underface of a follower slideable in the tubular member and a resilient switch arm extends across the path of the follower to be actuated by the swinging of the pendulum.
Inventors
- 👤 T Takada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:06
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/14; B; B60; B60R; B60R22/00; B60R22/34; B60R22/343; H01H35/02; H01H35/027
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
214 words
An inertia switch device comprising a supporting member, a vertically extending tubular socket member located on said supporting member, a switch including a contact element and a switch arm mounted on said support member and being mutually electrically insulated, said switch arm extending across the top of said socket member and being movable between an actuated and a deactuated position to alternatively engage and disengage said contact element and normally urged to its deactuated position, a pendulum depending from said supporting member for universal swinging relative to said supporting member and including a head member located at the upper part of said pendulum and being angularly movable with the swinging of said pendulum and having a cam defining upper face registering with the lower part of said tubular socket member, and means including a follower member engaging said cam and vertically slidably movable in said tubular socket member by said cam to an advanced raised position to move said arm to its actuated position when said pendulum swings a predetermined angle from its normal rest position and is slidably movable to a lower retracted position to permit the movement of said switch arm to its deactuated position when the angle of said pendulum relative to said rest position is less than said predetermined angle.
Claim 2
Dependent Claim
214 words
An inertia switch device comprising a supporting member, a vertically extending tubular socket member located on said supporting member, a switch including a contact element and a switch arm mounted on said support member and being mutually electrically insulated, said switch arm extending across the top of said socket member and being movable between an actuated and a deactuated position to alternatively engage and disengage said contact element and normally urged to its deactuated position, a pendulum depending from said supporting member for universal swinging relative to said supporting member and including a head member located at the upper part of said pendulum and being angularly movable with the swinging of said pendulum and having a cam defining upper face registering with the lower part of said tubular socket member, and means including a follower member engaging said cam and vertically slidably movable in said tubular socket member by said cam to an advanced raised position to move said arm to its actuated position when said pendulum swings a predetermined angle from its normal rest position and is slidably movable to a lower retracted position to permit the movement of said switch arm to its deactuated position when the angle of said pendulum relative to said rest position is less than said predetermined angle.
Claim 3
Dependent Claim
28 words
The device of claim 1 wherein said follower member is formed of an electrical insulative material and when in its advanced position engages and raises said switch arm.
Claim 4
Dependent Claim
18 words
The device of claim 2 wherein said switch arm engages said contact element when said switch is actuated.
Claim 5
Dependent Claim
69 words
The device of claim 2 wherein said pendulum includes a pendulum arm and a weight at the lower end of said pendulum arm, said head member being located at the upper end of said pendulum arm and having a spherically surfaced underface and said tubular socket member having at its lower part a spherically surfaced socket face engaging said head underface to define therewith a ball and socket joint.
Claim 6
Dependent Claim
32 words
The device of claim 4 said follower member slidably registering with said tubular socket member for axial movement therein and said switch arm being disposed in the path of said follower member.
Claim 7
Dependent Claim
40 words
The device of claim 5 wherein the underface of said follower member is flat and the cam defining face of said head is flat and coincides with said follower member underface when said pendulum is in its normal rest position.
Claim 8
Dependent Claim
32 words
The device of claim 5 wherein aid follower member includes a projection centrally located on its top face and said switch arm includes a depending dimple in vertical alignment with said boss.
Claim 9
Dependent Claim
20 words
The device of claim 5 wherein said socket member is provided with an inwardly directed lip along its upper edge.
Claim 10
Dependent Claim
35 words
The device of claim 5 said supporting member comprising a mounting plate, said socket member being integrally formed with said mounting plate and said switch arm and contact element being positioned on said mounting plate.
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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |