Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1979-09-21
1980-12-30
Jillions, John M.
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
A62B 3500, B65H 7548
Patent
active
042418879
ABSTRACT:
A ratchet wheel carried by a rotatably mounted seat belt reel is selectively engageable by a pawl to prevent belt winding reel rotation and thereby hold the belt extended at a set slackened length about the occupant. The pawl is mounted on the housing in a manner which permits radial movement between ratchet wheel engaging and disengaging positions and for tangential shifting movement between a first limit in the winding direction and a second limit in the unwinding direction. The mounting of the pawl is effective to block radial movement to the engaging position when the pawl is tangentially positioned at the second limit in the unwinding direction. A control disc is frictionally clutched to the reel and has an abutment for shifting the pawl to the first limit upon reel winding and to the second limit upon reel unwinding. The control disc functions to engage the pawl with the ratchet wheel upon initiation of reel unwinding subsequent to a prior reel winding having shifted the pawl to the first limit to unblock the pawl for movement to the engaged position, thereby holding the belt at a slackened length with respect to the occupant. The disc is further effective to move the pawl to the disengaged position upon further reel unwinding and then shift the pawl to the second limit upon engagement by the abutment to again block the pawl in the disengaged position and thereby permit belt winding reel rotation to pull the belt taut against the occupant.
REFERENCES:
patent: 2976959 (1961-03-01), Husted
patent: 3590656 (1971-07-01), Lloyd
patent: 3858826 (1975-01-01), Sprecher
patent: 4023746 (1977-05-01), Magyar
General Motors Corporation
Jillions John M.
Leahy Charles E.
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