Single bus DC control circuit

Details Single bus DC control circuit Single bus DC control circuit

1975-11-26

1977-01-18

Schaefer, Robert K.

Electrical transmission or interconnection systems

Switching systems

Plural switches

318293, 212 21, H01H 1964

Patent

active

040041565

ABSTRACT:
A DC control circuit supplies direct current of either polarity at a high or a low level to a crane hoist or the like via a single bus bar to control up, down, low or high speed functions. A network of diodes and ganged switches at a remote control panel supplies the selected level and direction of current to the bus bar while a control circuit moving with the powered equipment responds to the voltage level and polarity picked off of the bus bar by means of a high voltage responsive relay coil circuit and dual, parallel, diode, relay coil circuits responsive to polarity.

REFERENCES:
patent: 1102550 (1914-07-01), Schiebeler
patent: 2332390 (1943-10-01), Manney
patent: 3078406 (1963-02-01), Zweifel et al.
patent: 3179869 (1965-04-01), Cory

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