The Singer Company

Robertshaw Controls Company

Joseph S Danon

Denis G Wolfe

Theodore Emil Kwast

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. The reset valve is adjustable to permit the delay to be set as desired.

Valve operator

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.

Burner system with absorbent carbon flame responsive switch

A slam-shut valve provides overpressure protection in a pipeline in the event of pressure regulator failure. The slam-shut valve is normally held in the open position by a latch assembly. Overpressure or failure of the regulator will automatically trigger operation of the slam-shut valve to close the same and prevent further passage of the gas through the pipeline. The reset assembly must be manually operated to re-engage the latch assembly so as to open the slam-shut valve once it has been triggered closed. The latch assembly coacts with a release assembly having a release shaft which detachably holds a spring latch affixed to a lever pivotally mounted upon the reset shaft of the reset assembly. Subsequent to its release, the spring latch will be re-engaged with the release shaft in order to reopen the slam-shut valve. Dependent upon the position of the release shaft, the spring latch may be required to deflect prior to relatching upon the release shaft. Otherwise, the lever of the reset assembly will reposition the release shaft in the raised position upon the spring latch being re-engaged therewith. In any event, the latch assembly provides for low-friction, binding-free release of the reset assembly promptly to close the slam-shut valve once an overpressure condition triggers operation thereof.

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El Toro, CA, United States of America

Joseph S Danon