Texas Instruments Corporation

Patrick F Meleney

Thomas J Charboneau

Donald J Chiavaroli

A pressure system has a pressure vessel holding gas under pressure and has a pressure responsive device arranged to be responsive to loss of gas from the vessel to provide a warning signal or the like corresponding to the gas loss. The device has two springs opposing movement of a device diaphragm in response to the gas pressure in the vessel, one spring being arranged to oppose diaphragm movement resulting from change in the gas pressure due to change in gas temperature from a selected temperature in accordance with the gas law, and the other spring being arranged to permit diaphragm movement to change position of a control to provide a signal corresponding to a gas loss when change in the gas pressure in the vessel decreases to a selected level at the selected gas temperature. The cooperation of the two springs permits the device to respond to pressure changes in the vessel which are due to change in gas temperature as well as to any loss of gas which may occur and provides the desired warning signal when loss of gas is sensed at any system temperature within a temperature range likely to be encountered.

Growing community of inventors

Attleboro, MA, United States of America

Patrick F Meleney