Electric circuit for selecting operational conditions of load

Electrical transmission or interconnection systems – Plural load circuit systems – Selectively connected or controlled load circuits

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318DIG2, H02J 100

Patent

active

040755010

ABSTRACT:
A wiper switch is connected to a wiper motor through a relay switch and further to a switch condition discrimination circuit which produces a trigger signal when the wiper switch is actuated from the closed state to the opened state and again to the closed state within a fixed time. A multivibrator is connected to the switch condition discrimination circuit and begins to oscillate upon receiving the trigger signal. The relay switch connected between the wiper motor and the wiper switch is actuated to open when receiving the oscillation pulses from the multivibrator, whereby the wiper motor is intermittently supplied with the electric power to perform the intermittent wiper operation.

REFERENCES:
patent: 3355577 (1967-11-01), Heuer
patent: 3426259 (1969-02-01), Ziehm
patent: 3852722 (1974-12-01), Neuville
patent: 3899773 (1975-08-01), Yamauchi et al.
patent: 3911316 (1975-10-01), Feick et al.

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