Seat belt retractor having integral seat belt warning switch

Details Seat belt retractor having integral seat belt warning switch Seat belt retractor having integral seat belt warning switch

1988-08-19

1989-09-12

Scott, J. R.

Electricity: circuit makers and breakers

Special application

Running length, web or strand actuated

200 6158B, H01H 316

Patent

active

048662232

ABSTRACT:
A seat belt retractor for motor vehicle applications having a switch assembly for controlling a seat belt warning indicator or other electrical circuits requiring an input of belt webbing extension or retraction. The switch assembly includes a cam disk which is rotatable with the retractor spool having generally spiral grooves on one of its radial face surfaces. A follower, made of an electrically conductive material, engages the grooves and is moved radially in response to the rotated position of the spool. When the follower reaches a predetermined radial position, the follower engages the electrical contacts, thereby closing an electrical circuit.

REFERENCES:
patent: 3506305 (1970-04-01), Eineman, Jr. et al.
patent: 3667698 (1972-06-01), Fisher
patent: 3862727 (1975-01-01), Fisher
patent: 3956603 (1976-05-01), Fisher
patent: 4002311 (1977-01-01), Fisher et al.
patent: 4034931 (1977-07-01), Fisher et al.
patent: 4149683 (1979-04-01), Fisher et al.
patent: 4165054 (1979-08-01), Collins

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