Electricity: electrical systems and devices – Control circuits for electromagnetic devices – For relays or solenoids
Patent
1977-01-31
1978-05-23
Moose, Jr., Harry E.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
For relays or solenoids
307113, H01H 4732
Patent
active
040914380
ABSTRACT:
A press control system in which multiple pushbuttons are employed for initiating a press cycle with each pushbutton including a normally closed and a normally open blade and with each switch blade having connected in parallel therewith a monitoring circuit which produces logic signals in conformity with the position of the respective switch blade. A logic circuit analyzes the logic signals from the several monitoring circuits and permits operation of the press only when all of the switches operate properly during a press cycle.
REFERENCES:
patent: 3183377 (1965-05-01), Holland
Fortman Ronald F.
Olding Michael J.
Stewart William J.
Jeffers Albert L.
Moose Jr. Harry E.
The Minster Machine Company
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