Pressure switch with snap-toggle adjusting means

Abstract

A snap-action pressure switch has an adjustable trip point for controlling the switching pressure. A flexible bracket has a bearing portion pivotally mounting a lever between the ends thereof. Contact means are actuated by one end of the lever. A toggle spring is biased between the other end of the lever and a pressure-responsive actuator for causing snap-action pivoting of the lever when the toggle spring passes through an overcenter force-reversing toggle point as the actuator moves in response to pressure. The bearing portion of the flexible bracket is adjustably movable with respect to the actuator, thus moving the pivot point of the lever to change the toggle point of the spring with respect to movement of the actuator, whereby to afford an adjustable switching pressure. The trip point is further controlled by an adjustble range spring biasing the actuator against pressure-induced movement.

Dependencies are inferred from the claim text.