High pressure responsive switch and method for making same.

摘要

A pressure responsive switch is shown having an electrically conductive body (12) formed with a bore (24) which extends from one side through the body into recess (30) formed in the opposite side of the body. A switch assembly (34) is received and locked in the recess by crimping downwardly extending wall (32) of the body over the assembly. The switch assembly has a terminal (35) formed with a stationary contact (36) on an end thereof mounted electrically isolated from an annular disc seat member (40) which in turn receives an electrically conductive disc member (56) and a flexible diaphragm (60). An elongated piston (64) is receivable in a port (18) of a pump and is slidably received in bore (24) of body (12) with an end (70) placed contiguous to the diaphragm (60) and center of the disc member (56). A piston retainer ring (68) is disposed on piston (64) adjacent end (70) and located so that a selected preload is placed on the switch assembly which in turn maintains the piston (64) in a vertical orientation relative to a retainer shelf (66) against which the retainer ring reacts. <IMAGE>