Electric control circuit

Details Electric control circuit Electric control circuit

1983-03-22

1985-09-24

Pellinen, A. D.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

307140, 307141, 361197, 361205, 200 39R, H01H 4732

Patent

active

045434930

ABSTRACT:
Apparatus for switching alternating current from a power source to a load for substantially all of one selected half-cycle, but not before at least one full cycle after the apparatus receives an operator command to switch the current, includes a mechanical switch for commanding the apparatus at an arbitrary time to switch the current. Electrical control devices produce a control output during a portion of the selected half-cycle. A second switch device, such as an SCR, responsive to the control output switches the current to the load during the selected half-cycle. The control output is turned off before the end of the half-cycle and is not produced again until the mechanical switch is released and provides another command to switch the current.

REFERENCES:
patent: 2866862 (1958-12-01), Bachi
patent: 3267337 (1966-08-01), Doyle et al.
patent: 3345546 (1967-10-01), Beltramo
patent: 3662190 (1972-05-01), Naber
patent: 3971969 (1976-07-01), Wines et al.
patent: 4021626 (1977-05-01), Becker
patent: 4270058 (1981-05-01), Schormack
patent: 4276486 (1981-06-01), Ahuja et al.
patent: 4370564 (1983-01-01), Matsushita
patent: 4449161 (1984-05-01), Kling

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