Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1978-01-06
1979-07-31
Hornsby, Harvey C.
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
2421074R, A62B 3500, B65H 7548
Patent
active
041627725
ABSTRACT:
A seat belt retracting and winding device comprises a housing, a winding shaft rotatably mounted within the housing, a seat belt wound around the winding shaft with one end made fast to the winding shaft, a first and strong spring with one end made fast to the housing, a second and weak spring with one end made fast to the winding shaft, the second spring being connected in series to the first spring, and a control means which may cause the first spring not to exert its returning force on the seat belt in the direction in which is wound the seat belt when the seat belt is unwound and extended against the forces of both the first and second springs and is fastened and which may cause the first spring to exert its turning force on the seat belt when the latter is unfastened. The seat belt retracting and winding device further includes a means for relaxing an impact exerted on the second spring when the turning force of the first spring is exerted on the seat belt so that the quick compression or winding of the second spring may be avoided, the durability of not only the second spring but also a member retaining the second spring may be improved, the generation of noise may be minimized and a driver or an occupant may be refrained from being subjected to an unpleasant restraining force.
REFERENCES:
patent: 3984063 (1976-10-01), Knieriemen
patent: 4026494 (1977-05-01), Tanaka
Kuwakado Satoshi
Shimogawa Toshiaki
Hornsby Harvey C.
Jillions John M.
Nippon Soken Inc.
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