Electrical transmission or interconnection systems – Switching systems – Repetitive make and break
Patent
1982-04-16
1983-01-04
Griffin, Donald A.
Electrical transmission or interconnection systems
Switching systems
Repetitive make and break
200 38DA, H01H 4318, H01H 4330
Patent
active
043674160
ABSTRACT:
A random timer including a reversible electric drive motor, an output means, and a power circuit connecting a power supply to the drive motor and output means and where two dissimilar cam type timing elements are controlled by the drive motor to provide irregular non-continuous operative phases of output energy, and the power circuit of the motor includes a switch which is opened temporarily by each power phase actuation of the timing elements to provide an opportunity for the drive motor to reverse and change the timer cycle.
REFERENCES:
patent: 3155848 (1964-11-01), Burford
patent: 3750132 (1973-07-01), Natter
patent: 3925629 (1975-12-01), Albinger
patent: 3935404 (1976-01-01), Persson
patent: 3937910 (1976-02-01), Fukami
patent: 4029918 (1977-06-01), Kah
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