ELECTRIC INSTALLATION TOOLS Russian patent published in 2001 - IPC

FIELD: electrical engineering, manufacture of parts of low-voltage electric equipment, specifically, bridge contacts of contactors and starters. SUBSTANCE: electric installation tools come in the form of flat-nosed pliers with working jaws. One of jaws forms frame rectangular in plan, having variable thickness over its length and longitudinal groove of variable depth to accommodate contact bridge of device and central working cut-out in bottom part of groove in one end of frame to accommodate strap of metal or high-conductance alloy subject to resistance welding to contact bridge of device. Working cut-out has configuration and dimensions corresponding to configuration and dimensions of strap and groove in end of frame distant from working cut-out has greater depth than the rest of it over length of frame and flange. Frame in zone of location of section of groove of greater depth has thickness exceeding thickness of frame in section of location of working cut-out. Thickness of bottom part of groove in zone of location of working cut-out does not exceed thickness of strap and height of walls of groove in zone of location of working cut-out does not exceed height of longitudinal walls of contact bridge. Another jaw of flat-nosed pliers has clamp section to hold each contact bridge in process of welding. EFFECT: convenient resistance welding of parts of electric equipment with simultaneous provision of precision and reliability of registration of joined parts, raised productivity and safety of welding. 3 cl, 7 dwg