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。

公开(公告)号：US3798400A

公开(公告)日：1974-03-19

申请号：US3798400D

申请日：1973-03-16

Applicant: CONTROLS CO OF AMERICA

Inventor： GEBEL I ,  KAHALE A

IPC: H01H9/12 ,  H01H35/34

CPC classification number: H01H9/12

Abstract: The pressure switch has a switch mounted in the plastic, electrically insulative case above the diaphragm. The perimeter of the diaphragm is captured between the plastic case and the cup which has a tubular connector for connection to a source of pressure to be sensed. The chamber below the diaphragm between the diaphragm and cup is the pressure chamber and pressure variations cause flexure of the diaphragm and operation of the switch. The rim of the cup is rolled over the case flange to hold the parts assembled. The mounting bracket is secured to the case and to the appliance (or other equipment) frame - which is electrical ground - and, therefore, satisfies more stringent electrical requirements. In order to ground the cup - even though it is electrically dead - one end of a conductive ground strap is captured between the case and the cup when the cup rim is rolled over the case flange. The other end overlies the bracket and is captured by a screw mounting the bracket to the case. The arrangement meets demanding electrical requirements at very low cost and without requiring added costy manufacturing operation.

Abstract translation: 压力开关具有安装在隔膜上方的塑料电绝缘壳体中的开关。 隔膜的周边被捕获在塑料外壳和杯之间，该杯具有用于连接到要感测的压力源的管状连接器。 隔膜和杯之间的隔膜下方的腔室是压力室，压力变化引起隔膜的弯曲和开关的操作。 杯的边缘在壳体凸缘上滚动以保持组装的部件。 安装支架固定到外壳和电器（或其他设备）框架 - 电气接地 - 因此满足更严格的电气要求。 为了将杯子接地 - 即使它是电死的，当杯子边缘滚过外壳法兰时，导电接地带的一端被捕获在外壳和杯之间。 另一端覆盖支架，并通过将支架安装到外壳上的螺钉捕获。 该装置以非常低的成本满足苛刻的电气要求，并且不需要额外的昂贵的制造操作。