Electricity: circuit makers and breakers – Fluid pressure – Diaphragm
Patent
1985-12-17
1987-02-24
Macon, Robert S.
Electricity: circuit makers and breakers
Fluid pressure
Diaphragm
200148A, 200148R, H01H 3340, H01H 3354
Patent
active
046458883
ABSTRACT:
A single-phase ground enclosed load break switch for distribution voltages has a hermetically sealed cylindrical metal housing of from 2 to 6 inches diameter which contains an insulating gas under pressure. The switch has a movable contact assembly to contact a pair of opposed stationary coaxial conductors within the housing. A rocking bellows at the fulcrum of a crank actuator provides a compact hermetic seal for the actuator without excessive strain of the bellows. A safety interlock with a visual indicator locks the contact assembly in case of a loss of pressure. Excessive pressure in the switch causes the bellows to be punctured with consequent locking of the contact assembly. The switch is small enough to be mounted directly on a transformer or placed into a cable, without the need for a separate enclosure.
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Barkan Philip
Gere David S.
Burkard Herbert G.
Macon Robert S.
Raychem Corporation
Rice Edith A.
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