公开(公告)号：US3720936A

公开(公告)日：1973-03-13

申请号：US3720936D

申请日：1971-09-03

Applicant: CONTROLS CO OF AMERICA

Inventor： KAHALE A ,  YATSUSHIRO K ,  WIELGOS T

IPC: D06F37/20 ,  H01H35/00 ,  G08B21/00

CPC classification number: H01H35/00 ,  D06F37/203

Abstract: The switch is designed to be used in a washing machine to sense an out-of-balance condition of the tub during the spin cycle. The assembly is wired into the washer with the coil in series with the washer motor but the coil is normally shunted by a switch which is self biased to its ''''closed'''' position bridging the coil terminals. In this condition the motor operation is normal. When an out-of-balance tub in a clothes washer bumps the wand projecting from the armature the armature is moved to the core of the coil and actuates the switch plunger to open the switch, thus placing the coil in series with the motor. The relatively high impedance of the coil relative to the motor impedance limits motor current so the motor stops. The A-C supply to the coil causes the armature to vibrate (buzz) giving an audible signal that the washer has stopped due to an unbalanced load. The washer is restored to normal by opening the line switch which deenergizes the coil to thereby release the armature and permit the switch to reclose and restore the coil shunt.

Abstract translation: 该开关设计用于洗衣机，以便在旋转循环期间感测浴缸的不平衡状态。 组件连接到垫圈中，线圈与洗衣机电机串联，但是线圈通常被开关自动分流，该开关自动偏置到桥接线圈端子的“闭合”位置。 在这种情况下，电机运行正常。 当洗衣机中的不平衡桶撞击从电枢突出的魔杖时，衔铁被移动到线圈的芯部并且致动开关柱塞以打开开关，从而将线圈与电动机串联。 线圈相对于电机阻抗的相对较高的阻抗限制电机电流，因此电机停止。 线圈的A-C电源使电枢振动（蜂鸣声），给出一个可听见的信号，表示垫圈由于负载不平衡而停止。 通过打开线圈开关使垫圈恢复正常，线路开关使线圈断电，从而释放电枢，并允许开关重新闭合并恢复线圈分流。