Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1977-04-27
1978-10-17
Hornsby, Harvey C.
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
2421074R, 62B 3502, B65H 7548
Patent
active
041204670
ABSTRACT:
In accordance with this invention, there is provided a safety belt retractor comprising a frame, a spool mounted for rotation on the frame and having seat belt webbing wound thereon, first means biasing the spool in a rewind direction and means for reducing the tension of the webbing against the wearer due to the bias force of the first biasing means, the tension reducing means comprising a second means biasing the spool in a rewind direction and having a lower biasing force than the first biasing means, the tension reducing means being activated upon a retraction movement of a withdrawn seat belt followed by a slight further extension of the belt and a subsequent slight additional retraction of the belt from the further extended position, the tension reducing means operable when activated to block out the rewind bias of the first biasing means and permitting the second biasing means to apply its lesser rewind force to the spool. The tension reducing means preferably is automatically deactivated upon further retraction from the slight additional retraction position whereby the first biasing means is no longer blocked out and is permitted to exert its stronger rewind bias force to wind up the belt.
REFERENCES:
patent: 3957222 (1976-05-01), Bladh
patent: 3984063 (1976-10-01), Knieriemen
patent: 4026494 (1977-05-01), Tanaka
Allied Chemical Corporation
Criss Roger H.
Henry Patrick L.
Hornsby Harvey C.
Jillions John M.
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