公开(公告)号：US3845265A

公开(公告)日：1974-10-29

申请号：US37578073

申请日：1973-07-02

Applicant: CONTROLS CO OF AMERICA

Inventor： KOTHE E

IPC: H01H35/34 ,  H01H35/26

CPC classification number: H01H35/2607

Abstract: To minimize space requirements, a small adjusting cam is mounted beside and projects below the side of the central housing of the pressure switch. The cam actuates a follower lever which, in turn, actuates an adjusting lever acting on the calibrating (pressure adjusting) spring plunger. The double lever arrangement achieves a motion multiplying effect permitting use of a small cam and, hence, reduces space requirements. The adjusting lever is movable about an axis, one end of which is adjustable by means of a calibrating screw which prevents transmission of forces from the calibrating tool to the lever and thus allows automatic calibration. The extra low setting of the pressure switch is determined by another calibrating screw fixed in the mounting bracket to prevent transmission of adjusting forces to the lever and permit automatic calibration. The cam may be rotated to an extra low position in which the follower lever has no effect on the position of the adjusting lever, the position of the adjusting lever being determined solely by the extra low calibrating screw. A second extra low setting is provided, in which position the cam actuates an arm which may be connected to a clutch or switch altering the speed of a timer, for example, to permit alteration in the operational characteristics of the washing machine in combination with the extra low setting.

Abstract translation: 为了最小化空间要求，小型调节凸轮安装在压力开关中央外壳侧面旁边并突出。 凸轮致动一随动杠杆，该从动杆又起动作用在校准（调压）弹簧柱塞上的调节杆。 双杠杆装置实现了允许使用小凸轮的运动倍增效果，因此减小了空间要求。 调节杆可绕轴线移动，其一端可通过校准螺丝调节，该校准螺钉防止力从校准工具传递到杠杆，从而允许自动校准。 压力开关的额外低设置由固定在安装支架中的另一个校准螺钉确定，以防止调节力传递到杠杆并允许自动校准。 凸轮可以旋转到超低位置，其中从动杆对调节杆的位置没有影响，调节杆的位置仅由额外的低校准螺钉确定。 提供了第二个超低设置，在该位置，凸轮致动臂，该臂可以连接到离合器或开关，其改变定时器的速度，例如，以允许洗衣机的操作特性与 超低设置。