Electricity: circuit makers and breakers – Interlocking – Between plural switches
Patent
1981-10-30
1983-08-23
Scott, J. R.
Electricity: circuit makers and breakers
Interlocking
Between plural switches
H01H 926
Patent
active
044005997
ABSTRACT:
An interlock assembly for preventing two electrical control devices from simultaneously assuming a closed or "ON" position. The assembly comprises two subassemblies which are operably connected by a push/pull flexible cable. Each subassembly includes a frame member which carries a reciprocally movable plunger unit. A stop link is pivotally connected to the plunger unit at one end and carries a guide rod at its opposite end. The guide rod is retained within a guideway formed in the frame member which has a main longitudinally extending portion and an offset portion. The plunger unit is prevented from reciprocal movement to a depressed position when the guide rod is in the offset portion whereas reciprocal movement of the plunger unit to a depressed position is permitted when the guide rod is in the main portion of the guideway. The cable connects the respective guide rods in a manner which prevents both rods from being positioned in the main portion of the respective guideways, whereby only one plunger unit is able to assume a depressed position at any given time.
REFERENCES:
patent: 2328801 (1943-09-01), Hammell
patent: 3448226 (1969-06-01), Mading et al.
Golden Larry I.
Guttman Richard T.
Lesser Norton
Scott J. R.
Square D Company
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