Abstract: Disclosed is an operating mechanism for high voltage switches that incorporates certain uncoupling, drawout, and interlocking features. The operating mechanism is mounted on rollers which roll in tracks on upper and lower mounting brackets attached to the side of the equipment enclosure also containing the high voltage switches. A latching mechanism secures the switch operating mechanism in its test and maintenance positions. By operating a drawout latch lever which is located on the control panel of the operating mechanism on the outside of the equipment enclosure, the latching mechanism can release the switch operating mechanism from the test or maintenance positions permitting it to be reinserted or withdrawn farther. The drawout latch lever on the control panel of the switch operating mechanism also indicates when the switch operating mechanism is in the test or maintenance positions. The coupled position of the switch operating mechanism is sensed electrically by a position indicating switch.

Abstract: Main contact and interrupter contact operating rods of opposed current interrupters are sequentially moved by a spring loaded operating mechanism to open the main contacts and interrupting contacts of the interrupter switches. Rotation of an input shaft trips a first overcenter toggle linkage by the engagement of a cam on a drive lever operably connected to the shaft. Tripping of the first overcenter toggle linkage allows the springs to rapidly move a main rod arm assembly connected to the main contact operating rods to open the main contacts. Rotation of the main rod arm assembly trips a second overcenter toggle linkage connected to a fast rod arm assembly permitting springs to rotate the fast rod arm assembly connected to the interrupter contact rods to open the interrupting contacts in sequence. Continued rotation of the shaft in the same direction causes abutments on the drive lever to engage the main rod arm assembly and the fast rod arm assembly to recock the mechanism for subsequent operation.

Abstract: Disclosed is an interrupter switch mechanism for interrupting current flow in a high voltage electrical circuit. A tubular switch blade is mounted for linear movement to engage and disengage a stationary contact. A spring is positioned within the hollow interior of the tubular switch blade so that it can be biased in either direction by sliding plugs also positioned within the tubular switch blade. The sliding plugs include pins which engage a slot in a plate member so that movement of the plate member in either direction causes one or the other of the plugs to move to bias the spring in that direction. The plate member has gear teeth formed thereon for engaging mating teeth on a tool engaging disk. The tool engaging disk has an opening therein for engaging the end of an insulated tool which may be rotated to operate the mechanism. The plate member also has cam surfaces which engage first and second cam follower members to cause these cam follower members to pivot.

Abstract: Disclosed is a tool for removing and installing fuses in metal-enclosed switchgear. The switchgear includes one or more fuses and one or more isolating switches and operating mechanisms for isolating the fuses from a high voltage supply circuit. The fuses are mounted between disengageable contacts that connect the fuse between the supply circuit and a load circuit. Access ports are provided through a front panel of the switchgear and are aligned with the fuses for providing access to the fuses. A tool receiving receptacle is mounted on the front panel around the access ports. The tool comprises a hollow metal housing having a hollow interior and having a flange on one end for being received and retained by the receptacle. The receptacle aligns the hollow interior of the metal housing with the access port, and makes grounding connection from the housing to the front panel. The tool also comprises an operating portion including a handle mounted on one end of an insulator.