US3578260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inertia reel mechanisms
Assignee: Kangel Magnet Ltd
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Filing: 1969-06-25
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Granted: 1971-05-11
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Expires: 1989-06-25
Abstract
Abstract In a vehicle-sensitive inertia reel device of the pendulum type, the pendulum is arranged to cause a subsidiary pawl to move from a first position in which it does not engage with a subsidiary ratchet wheel mounted on the reel to a second position in which it does so engage, rotation of the reel in the direction resisted by the main pawl when the subsidiary pawl is in its second position being operative to move the subsidiary pawl from its second position to a third position and movement of the subsidiary pawl from its second position to its third position being arranged to cause the main pawl to move from a first position in which it engages in one direction and a second position in which it does not so engage.
Inventors
- 👤 John Kell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:11
CPC Classifications
B; B60; B60R; B60R22/00; B60R22/34; B60R22/36; B60R22/40; B60R2022/401
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
181 words
An inertia reel device comprising a reel, a main ratchet wheel mounted for rotation with the reel, a subsidiary ratchet wheel mounted for rotation with the reel, a main pawl movable between a first position in which it does not engage with the main ratchet wheel to resist rotation thereof in one direction and a second position in which it does so engage, a subsidiary pawl movable from a first position in which it does not engage with the subsidiary ratchet wheel to a second position in which it does so engage, and an inertia-sensing device operative when subject to acceleration to move the subsidiary pawl from its first position to its second position, rotation of the reel in the direction resistable by the main pawl when the subsidiary pawl is in its second position being operative to move the subsidiary pawl from its second position to a third position and movement of the subsidiary pawl from its second position to its third position being operative to cause the main pawl to move from its first position to its second position.
Claim 2
Dependent Claim
181 words
An inertia reel device comprising a reel, a main ratchet wheel mounted for rotation with the reel, a subsidiary ratchet wheel mounted for rotation with the reel, a main pawl movable between a first position in which it does not engage with the main ratchet wheel to resist rotation thereof in one direction and a second position in which it does so engage, a subsidiary pawl movable from a first position in which it does not engage with the subsidiary ratchet wheel to a second position in which it does so engage, and an inertia-sensing device operative when subject to acceleration to move the subsidiary pawl from its first position to its second position, rotation of the reel in the direction resistable by the main pawl when the subsidiary pawl is in its second position being operative to move the subsidiary pawl from its second position to a third position and movement of the subsidiary pawl from its second position to its third position being operative to cause the main pawl to move from its first position to its second position.
Claim 3
Dependent Claim
21 words
An inertia reel device as claimed in claim 1, in which the main pawl is spring biased into its first position.
Claim 4
Dependent Claim
26 words
An inertia reel device as claimed in claim 1, in which the subsidiary pawl is provided with a lip arranged to engage with the main pawl.
Claim 5
Dependent Claim
43 words
An inertia reel device as claimed in claim 1, in which the inertia-sensing device comprises a pendulum and means, responsive to displacement of the pendulum from the vertical, to cause movement of the subsidiary pawl from its first position to its second position.
Claim 6
Dependent Claim
128 words
An inertia reel device as claimed in claim 4, in which the means responsive to displacement of the pendulum from the vertical comprises a hemispherical operating member secured to the upper end of the pendulum with its plain surface uppermost, a socket, the pendulum being supported by engagement of said hemispherical operating member in said socket so that the pendulum can rotate through a limited angle in all directions about the center of curvature of the hemisphere, and a vertically reciprocable plunger supported on the plane surface of the hemisphere and having the subsidiary pawl resting thereon, whereby the displacement of the pendulum from the vertical causes the operating member to lift the plunger so that the subsidiary pawl moves from its first position to its second position.
Claim 7
Dependent Claim
32 words
A device as claimed in claim 5, in which the socket supporting the hemispherical operating member is pivotally mounted for rotation about a horizontal axis and is lockable in a desired position.
Claim 8
Dependent Claim
21 words
A device as claimed in claim 6, including an indicating member for providing an indication of the orientation of the socket.
Claim 9
Dependent Claim
55 words
A device as claimed in claim 1, in which the teeth of the ratchet wheel are so shaped that, if the pawl is moved into engagement therewith and a torque is applied to the reel in a direction such that the pawl inhibits rotation, the pawl is retained in engagement until such torque is removed.
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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |