Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1977-06-07
1979-05-01
Jenkins, Robert W.
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
244122B, 280744, B65H 7548, A62B 3500
Patent
active
041519671
ABSTRACT:
Device for stretching a band forming part of a safety belt for a vehicle which takes up any slack of the band and stretches same towards the body of a user when there is an abnormal change in the speed of the vehicle comprising a rotatably mounted winding-up core for the band having a cam at one end located within a housing, an arm journalled in the housing and pivotable between a position in the path of movement of the cam and a position outside of said path. In the inactive condition of the device the free end of the arm is positioned in the path of movement of the cam and defines with a surface of the cam and the walls of the housing a closed expansible chamber. An ignitable gun powder charge is held in the free end of the arm and there is means for igniting same when there is an abnormal change in speed to cause expansion of the chamber, rotation of said cam and movement of said arm to outside of the path of movement of the cam, and rotation of the core in the winding-up direction.
REFERENCES:
patent: 3077324 (1963-02-01), Strickland
patent: 3984127 (1976-10-01), Bendler et al.
patent: 4014479 (1977-03-01), Nilsson
Autoliv AB
Jenkins Robert W.
Jillions John M.
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