Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1992-02-07
1993-05-18
Tolin, Gerald P.
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
200 4302, 200 50B, 200 51R, H02B 110, H01H 920
Patent
active
052126242
ABSTRACT:
An interlock mechanism operably associated with the plug receptacle of an explosion-proof housing whereby a plug may be inserted into or removed from the receptacle only when electrical current is not delivered to the receptacle. The interlock mechanism comprises a safety shaft for engaging a plug inserted into the receptacle, a reciprocating shaft operatively connected to a circuit breaker handle, and a locking pin for securing the safety shaft in a standby position, whereby the circuit breaker handle cannot be moved unless the safety shaft engages the plug casing, the safety shaft cannot be disengaged from the plug casing unless the circuit breaker handle has been moved to an off position, and the safety shaft will not engage the plug casing until it is released by the locking pin after the locking pin is biased to its disengaged position by the inserted plug.
REFERENCES:
patent: 3735078 (1973-05-01), Appleton
patent: 4213098 (1980-07-01), Piston
patent: 4335286 (1982-06-01), Nelson
patent: 4521649 (1985-06-01), Nelson
patent: 4553000 (1985-11-01), Appleton
Johnson James G.
Mina Nabil L.
Appleton Electric Company
Tolin Gerald P.
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