New products

High Pressure Contact Switch. — In the new, type “MK-39”, high pressure contact switch announced by the Delta-Star Electric Company, Chicago, the blade mechanism not only converts the rotating motion of the operating insulator to the vertical swinging of the blade, but it also turns the tubular blade to make high pressure contact. The blade hinge end also has high pressure contacts. By means of a “high spotted” cam, high pressure is created in the closed position only. In the entire mechanism there are but four bearings. There are no stops to limit the swing of the blade as it approaches closing position just before final turning or twisting movement to make high pressure contact, thus insuring smooth operation without shocks or jars to the porcelain insulators. The new switch is available in all voltages up to 161 kv, and current capacities up to 2,000 amperes. Cemented cap and pin insulators, with tapped or slotted caps, or station post units with tapped or slotted cap and base are furnished, as preferred.