Automatic locking safety belt retractor

Details Automatic locking safety belt retractor Automatic locking safety belt retractor

1974-06-14

1976-11-16

Gilreath, Stanley N.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

2421074B, A62B 3500, B65H 7548

Patent

active

039919536

ABSTRACT:
An automatic locking safety belt retractor includes a bracket supporting a belt retracting reel provided with end first ratchet wheels and a first pawl member swingable into locking engagement with the ratchet wheel and spring biased out of engagement. A second ratchet wheel is rockable relative to the reel and is connected to the first pawl to advance it with advance of the second ratchet wheel. A cam rotates with the reel shaft and a second pawl carrying inertia wheel is rotatable on the shaft, the second pawl engaging the second ratchet wheel when the inertia wheel lags the cam to thereby advance the second ratchet wheel and lock the reel. A third ratchet wheel is rotatable with the inertia wheel and an inertia sensing pendulum, when actuated, advances a locking pawl into locking engagement with the third ratchet wheel to lock the reel. The acceleration required to actuate the pendulum sensor is less than that required to lock the reel, due to the inertia lag of the inertia wheel.

REFERENCES:
patent: 3450368 (1969-06-01), Glauser et al.
patent: 3552676 (1971-01-01), Weber
patent: 3632056 (1972-01-01), Hibbard et al.
patent: 3819126 (1974-06-01), Stoffel
patent: 3851835 (1974-12-01), Fohl
patent: 3858824 (1975-01-01), Stephenson
patent: 3907227 (1975-09-01), Takada

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