US PATENT SUBCLASS 200 / 50.22
.~.~ Shutter over contacts

Current as of: June, 1999
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200 /   HD   ELECTRICITY: CIRCUIT MAKERS AND BREAKERS

50.01  DF  INTERLOCKING {4}
50.21  DF  .~ Drawout-type switchgear {5}
50.22.~.~ Shutter over contacts

DEFINITION

Classification: 200/50.22

Shutter over contacts:

(under subclass 50.21) Subject matter wherein the interlock means is in the form of a sliding guard or shutter which physically closes off connecting apertures to the switch gear contacts.