Switchboard drawout apparatus with interlocked joint clamping an

Details Switchboard drawout apparatus with interlocked joint clamping an Switchboard drawout apparatus with interlocked joint clamping an

1976-06-21

1977-09-27

Tolin, Gerald P.

Electricity: circuit makers and breakers

Interlocking

Between plural switches

361339, H02B 104

Patent

active

040513343

ABSTRACT:
Drawout apparatus includes a carriage mounting a circuit breaker and supported on telescoping rails to facilitate racking movement of the circuit breaker between extreme positions of electrical engagement and disengagement with respect to switchboard primary terminals. Racking movement into the engaged position from an intermediate test position is mechanically assisted by a racking screw. While in the engaged position, a separate clamping screw of a joint clamping mechanism is operated to exert equal and oppositely directed forces on interleaved contact fingers of plural associated breaker-switchboard terminal connectors. An access control assembly interlocked with the clamping and racking mechanisms and the carriage position regulates access to the clamping and racking screws.

REFERENCES:
patent: 3804998 (1974-04-01), Rexroad
patent: 4004113 (1977-01-01), Ericson
patent: 4012610 (1977-03-01), Ericson

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