Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1976-05-19
1977-05-17
Gilreath, Stanley N.
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
2421074A, A62B 3500, B65H 7548
Patent
active
040237460
ABSTRACT:
A seat belt retractor according to the invention has a conventional inertia locking mechanism which permits the occupant to lean forwardly in the seat by unwinding belt from a reel which is biased in the winding direction by a winding spring. In accordance with the specific embodiment described, a winding prevention mechanism includes a ratchet connected to the reel and a pawl movably mounted on the housing for movement to a detenting position engaging the ratchet to block belt winding reel rotation and thereby hold the belt extended at a slackened condition about the occupant. A control disc and a blocking disc cooperate to control movement of the pawl to provide a belt retractor which prevents belt winding reel rotation to establish a slackened belt length, defines a first range of further unwinding movement during which progressive additional increments of belt slack is provided, defines a second range of further unwinding subsequent to which the belt is returned to a length within the first range, and is further effective to restore free belt winding reel rotation upon reel unwinding rotation beyond the limit of the second range.
REFERENCES:
patent: 3682412 (1972-08-01), Kuszynski
patent: 3700184 (1972-10-01), Francis
patent: 3794266 (1974-02-01), Schwartz
patent: 3834646 (1974-09-01), Heath
patent: 3858826 (1975-01-01), Sprecher
patent: 3869098 (1975-03-01), Sprecher
patent: 3917189 (1975-11-01), Bryll
General Motors Corporation
Gilreath Stanley N.
Jillions John M.
Leahy Charles E.
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