Patent ID: 6553840
Filing Date: 2003-04-29
Classification: G01D

Abstract:
Linear displacement sensor apparatus comprisinga pressure sensing transducer having a movable pressure sensing diaphragm, a housing defining a chamber in which the pressure sensing transducer is mounted, a plunger having a first spring seating head end portion and a second pressure transducer engaging portion, a hollow tubular button member slidably mounted in the housing and having a closed force receiving end disposed externally of the housing and having an open end which slidably receives the spring seating head end of the plunger, the plunger extending toward and into engagement with the pressure sensing diaphragm, and a coil spring received in the hollow tubular member between the closed end and the spring seating head of the plunger whereby inward movement of the button member causes an increase in force applied to the pressure sensing diaphragm.