发明授权
US3588657A Delay-action motor energizing control devices 失效
延迟动作电动机控制装置

Delay-action motor energizing control devices
摘要:
THIS CONTROL DEVICE, FOR THE DELAY-ACTION ENERGIZATION OF AN ELECTRIC MOTOR OF THE TYPE ADAPTED TO BE BRAKED BY SHORT-CIRCUITING THE ARMATURE DRIVING A MECHANISM HAVING A PREDETERMINED FIXED-STOP POSITION, COMPRISES A FIXED-STOP DEVICE FOR SHORT-CIRCUITING SAID ARMATURE AND A THERMAL DELAY-ACTION DEVICE ASSOCIATED WITH SAID FIXED-STOP DEVICE FOR RESTARTING THE MOTOR AFTER A PREDETERMINED TIME PERIOD. IT UTILIZES A HEATING-WIRE THERMAL DELAY-ACTION DEVICE WHEREIN THE HEATING WIRE PROPER IS OPERATIVELY CONNECTED TO A CONTACT ARM MOVABLE BETWEEN A MOTOR ENERGIZING CONTACT AND AN ARMATURE SHORT-CIRCUITING CONTACT AGAINST WHICH SAID WIRE IS NORMALLY URGED IN ITS COLD CONDITION.
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