Switchboard drawout apparatus incorporating joint clamping mechanism

Abstract From the Canadian patent

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 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 finger of plural associated breakerswitchboard terminal connectors.