Automatic locking safety belt retractor reel

Details Automatic locking safety belt retractor reel Automatic locking safety belt retractor reel

1976-03-02

1977-07-19

Gilreath, Stanley N.

Motor vehicles

Bodies

2421074B, 297388, A62B 3502, B65H 7548

Patent

active

040363228

ABSTRACT:
An automatic braking safety belt retractor reel includes a reel provided with a first ratchet reel rotatable with a shaft and spring biased in a belt retracting direction. A braking pawl is movable into engagement with the ratchet reel by a rockable second ratchet wheel which is advanced by a second pawl pivoted on an inertial wheel and urged into engagement with the ratchet wheel by a cam on the shaft when the inertial wheel lags the rotation of the cam as a result of the rapid shaft acceleration. An armature of magnetic material is mounted on a second pawl and an electromagnet having an annular core, when excited, attracts the armature to prevent the engagement of the second ratchet wheel by the second pawl and the braking of the reel. The electromagnet is excited upon occupation of the seat or closing of the vehicle door and is de-excited upon buckling of the belt.

REFERENCES:
patent: 3266842 (1966-08-01), Board et al.
patent: 3510085 (1970-05-01), Stoffel
patent: 3603525 (1971-09-01), Pringle
patent: 3741496 (1973-06-01), Beller
patent: 3804192 (1974-04-01), Takada
patent: 3836171 (1974-09-01), Hayashi et al.

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