Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1974-06-13
1976-01-06
Christian, Leonard D.
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
B65H 7548
Patent
active
039306224
ABSTRACT:
In an emergency locking safety belt retractor, a locking bar is operated by inertia responsive means which includes an inertia responsive mass and a locking bar for locking with teeth of the ratchet wheel associated with the belt winding wheel of the retractor. The inertia responsive means has been improved by the provision of having resilient means in force transmitting relation between the lock bar and the mass for receiving and storing energy imparted thereto by movement of the mass and for thereby urging the lock bar toward locking engagement with the ratchet wheel through a pawl bounce condition. The pawl bounce condition is defined as the condition that occurs when the lock bar initially bounces off the tooth of the lock wheel before attaining a locking engagement with the wheel. The resilient means may take the form of several different embodiments. In one embodiment, an actuator is mounted between the mass and the lock bar. A resilient stem is connected between the mass and the actuator, and the resilient stem may either be a spring wire or a coil spring. In another embodiment, the resilient means is mounted between the actuator and the lock bar and may either take the form of a diaphragm or a elastomeric material which absorbs energy in either stretching or compressing, or it may comprise a spring mounted on the lock bar for engagement with the actuator to absorb energy from the lock bar to the actuator.
REFERENCES:
patent: 3659800 (1972-05-01), Meyer
patent: 3722824 (1973-03-01), Hayashi
patent: 3819126 (1974-06-01), Stoffel
Tanaka Akira
Ziv Avraham
American Safety Equipment Corporation
Christian Leonard D.
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