Dual tension single spring retractor

Details Dual tension single spring retractor Dual tension single spring retractor

1976-10-13

1978-05-09

Hornsby, Harvey C.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

2421074R, A62B 3500, B65H 7548

Patent

active

040882810

ABSTRACT:
An emergency locking safety belt retractor having a safety belt wound upon a reel has a dual tension single spring retraction means including reduction gear means interposed between the reel and retractor spring which is selectively operated to reduce the force of the spring means upon the reel when the safety belt is protracted to a position of use and then slightly retracted for a limited amount of retraction movement during which the safety belt is in a "low tension zone" condition until the limited retraction movement allowed is exceeded and the full force of the spring is reapplied through the gear means to the reel.

REFERENCES:
patent: 1944264 (1934-01-01), Oravec et al.
patent: 1967902 (1934-07-01), Reichel
patent: 2514144 (1950-07-01), Shedlock
patent: 3976257 (1976-08-01), Fohl
patent: 3984063 (1976-10-01), Knieriemen
patent: 3997126 (1976-12-01), Karlsson

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