Abstract: The oxygen breathing controller (10) of the present invention provides a two-stage inlet regulator. In addition, the oxygen breathing controller is provided with an aneroid sensor (100) and a G-sensor (80). The G-sensor has at least two diaphragms (92,93) with G-pressure applied to one of them. Pressure control then depends on a ratio between the effective areas of the diaphragms.

Abstract: The oxygen breathing controller of the present invention provides a first inlet regulator and a second inlet regulator. The first inlet regulator is provided with a poppet with a diaphragm around its perimeter, and the second inlet regulator is controlled by a servo pilot regulator. The oxygen breathing controller is provided with a low flow control which controls the flow of oxygen below approximately 10 lpm at altitude below 34,000 feet at suction pressure of less than 2.5 inches of water. Above 34,000 feet of altitude or breathing suction pressures of above 2.5 inches of water, the servo pilot regulator controls the second stage valving assembly.

Abstract: The oxygen breathing control of the present invention for supplying oxygen to a user employs a first stage regulation module, a valving module which couples with the first stage regulation module, a servo regulator module and an aneroid module. The servo regulator module with oxygen conservation function during exhalation controls oxygen flow between zero to approximately 34,000 feet, and the aneroid module takes over the control of breathing pressure schedule between 34,000 to 45,000 feet. A flow restrictor screw module is employed in the passage between a control chamber and an inlet chamber of the valving module for regulating the flow between the two chambers.

Abstract: A valve operator is connected to a pipeline valve to control the throughput flow therethrough. A plurality of chambers are formed in the housing including control, balancing, bleed and regulator chambers. A poppet valve and an orifice device are disposed in the bleed chamber to be independently shiftable therein to vary the discharge from the orifice device which is shifted responsive to the pressure in the control chamber, while the poppet valve is shifted responsive to the pressure in the regulator chamber. A reset valve is connected in a reset loop connected between the control and balancing chambers to produce a predetermined delay in balancing the pressure gradient therebetween.The regulating chamber is formed in a regulator section of the housing to be detachably connected thereto so that a plurality of regulator sections can be formed each having a different operative pressure range so that the valve operator is selectively usable for example for high, medium and low pressure operation.

Abstract: A thermal responsive switch employs a gas expansion operating member movable by changes in pressure of a gas charge in a chamber containing a carbonaceous adsorbent material formed from a compound of carbon and non-carbon component by removing the non-carbon component.