Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1988-10-31
1990-01-23
Jillions, John M.
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
2421074B, B60R 2238, B60R 2240
Patent
active
048953172
ABSTRACT:
A seat belt retractor comprises a spindle having seat belt webbing wound thereon. The spindle is supported for rotation in belt withdrawal and belt retraction directions. A member is movable between a first position in which the spindle is free to rotate in the belt withdrawal direction and a second position in which the spindle is blocked from rotating in the belt withdrawal direction. A permanent magnet is fixed to the member. An energizable electromagnet includes a core located adjacent the permanent magnet for attracting the permanent magnet to thereby move the member to one of its first and second positions when the electromagnet is de-energized. The core repels the permanent magnet to thereby move the member to the other one of its first and second positions upon energization of said electromagnet.
REFERENCES:
patent: 3952966 (1976-04-01), Burleigh
patent: 3967794 (1976-07-01), Fohl
patent: 4008864 (1977-02-01), Torphammar et al.
patent: 4103754 (1978-08-01), Ashworth et al.
patent: 4181326 (1980-01-01), Hollowell et al.
patent: 4573556 (1986-03-01), Andreasson
patent: 4729525 (1988-03-01), Rumpf
Roters, Electromagnetic Devices, 1941, pp. 490-504.
Fernandez Angel
Rumpf Robert J.
Jillions John M.
TRW Vehicle Safety Systems Inc.
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