Safety belt retractor locking device

Details Safety belt retractor locking device Safety belt retractor locking device

1974-11-18

1976-11-09

Gilreath, Stanley N.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

A62B 3500, B65H 7548

Patent

active

039906515

ABSTRACT:
A vehicle acceleration sensitive locking device is disclosed for use with a conventional safety belt retractor having a shaft mounted ratchet. The locking device includes a pivotally mounted pawl normally spaced from the ratchet by a preselected distance and an inertial mass pivotally mounted to sense change in vehicle velocity above a level predetermined to be dangerous. Movement of the inertial mass displaces the pawl to its operate position to block rotation of the ratchet and the safety belt retractor shaft and, thereby, prevent protraction of the safety belt when the change in vehicle velocity exceeds the predetermined level. The device further includes adjustment means operative to limit movement of the pawl away from the ratchet when the pawl is in its inoperative position to determine the normal spacing between said pawl and ratchet.

REFERENCES:
patent: 3722824 (1973-03-01), Hayashi
patent: 3834646 (1974-09-01), Heath
patent: 3868068 (1975-02-01), Heath
patent: 3901459 (1975-08-01), Romanzi et al.

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