H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/306, 348/44
H01H 17/26 (2006.01)
Patent
CA 1185000
ABSTRACT The control station comprises an enclosure having two ter- minal blocks disposed therein. Each terminal block has a set or nor- mally opened and normally closed contacts which are mechanically in- terlocked and movable into an open and closed position respectively by an actuating lever. The ground terminals of each set of contacts on each terminal block are electrically interlocked for common con- nection to an external ground line. The wiring terminals of the nor- mally closed contacts are electrically interlocked to provide a paral- lel connection through the respective normally closed contacts between an external circuit and the ground line. The terminal of the normally open contact on each terminal block is electrically connected to an external circuit, each proceeding an independent sequence for some controlled device when the contact is closed. Each actuating lever has depending therefrom a shock absorbing elastomeric cord which may be pulled by the operator to close the normally open contact and con- currently open the normally closed contact. Pulling one cord initi- ates a first sequence of operation and pulling the other cord initi- ates a second sequence of operation in the equipment being controlled. Pulling both cords at the same time initiates a third sequence of operation in the equipment being controlled. Barrier means are pro- vided to shield the movable levers.
407352
Driscoll Neil J.
Smart & Biggar
LandOfFree
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