Electricity: circuit makers and breakers – Special application – Turn indicator type switches
Patent
1988-02-22
1989-08-22
Scott, J. R.
Electricity: circuit makers and breakers
Special application
Turn indicator type switches
200 613, 200 6134, 200 6135, H01H 316
Patent
active
048598160
ABSTRACT:
A self-canceller for a turn signal indicator comprises the following features: (a) its body has a retaining element with three recesses formed therein; (b) the body is provided with a movable bracket capable of rotating; (c) a control lever is fastened to the movable bracket; (d) two side stoppers, a center stopper, and a spring housing are fastened to the movable bracket; (e) an engaging ball and a compression spring are contained in the spring housing; (f) a ratchet mount is provided between the center stopper and the compression spring; (g) the compression spring is supported by the engaging ball at one end and by the ratchet mount at the other end; (h) the engaging ball can be engaged with any of the three recesses of the body according to the rotary movement of the movable bracket; (i) two cancel ratchets are formed on the ratchet mount; and (j) when the cancel cam moving in the rotating direction of the control lever makes contact with either of the cancel ratchets, the ratchet mount can rotate about a point on the center stopper as a pivot against the compressing spring. When one of the cancel ratchets of the ratchet mount contacts and interferes with the cancel cam during the movement of the ratchet mount by the operation of the control lever, depending on the rotating position of the steering wheel, it is necessary to add only a very small force for compressing the compression spring, as opposed to the otherwise ordinary control force previously necessary, to operate the control lever against such interference.
REFERENCES:
patent: 4123632 (1978-10-01), Muto
patent: 4351991 (1982-09-01), Morita et al.
patent: 4570041 (1986-02-01), Ishiguro
Metro Denso Kabushiki Kaisha
Scott J. R.
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