Abstract: An indicator gauge may utilize a motion amplifying gauge movement. The motion amplifying mechanism makes it possible for a diaphragm-type pressure gauge to provide large angular displacements for an indicating pointer. The indicator gauge may be configured to have a maximum readout visibility in the range from about 0.degree. to about 270.degree.. A single-piece crankshaft located on an adjustable mounting translates the short range of motion of a diaphragm button to a pivotal gear segment. The crankshaft may be configured as a C-shaped crankshaft or an L-shaped crankshaft. The pivotal gear segment may be wedge-shaped or have an extension arm for contact with the crankshaft. The crankshaft may also contact a downwardly or upwardly extending boss located on the pivotal gear segment.

Abstract: A condition responsive sending and indicating unit for sensing a condition and transmitting a signal representative of the sensed condition to an indicator at a remote location. The sending unit includes indicia for giving an indication of the sensed condition at the site of the unit, and has a movable contact operatively associated with a variable resistor in circuit with the remote indicator, whereby a variable signal is produced in response to variation in the sensed condition. Calibration of the unit is accomplished by adjustment of the set point of the movable means, and by adjustment of the position of the resistor relative to the movable contact.

Abstract: A dump valve for dumping liquid from the bottom of a tank comprising an elongated valve body insertable into the lower end of the tank so that the valve body extends deeply into the tank, the innermost portion of the valve body having an inner port communicating with the interior of the tank, the valve body having a portion extending exterior of the tank when the body is inserted into the tank, the valve body having a central axial bore extending therethrough and communicating with the inner port for directing liquid away from the tank, a drain passage connected to the exterior portion of the valve body and communicating with the axial bore for draining liquid from the tank, a pair of head plates connected to the exterior portion of the valve body, the head plates being connected to each other and forming a diaphragm chamber therebetween, a diaphragm held in sealed clamping engagement between the head plates and dividing the chamber into two separate compartments sealed from each other, an elongated valve ste

Abstract: A rising liquid level in a gas scrubber for an air compressor is sensed by a float in the scrubber which opens a normally closed pneumatic vent valve whereby a very small pneumatic signal is delivered through a pneumatic spool valve to the chamber of a large diaphragm liquid dump valve on the scrubber which is operated automatically to drain liquid from the scrubber to maintain a safe liquid level in the scrubber. The dump valve mounted on the scrubber side wall penetrates deeply into the scrubber to avoid freezing of the dump valve.

Abstract: A combination monitoring and regulating instrument for oil field stationary engines or compressors receives oil by gravity in a float chamber having a float operated oil admission and shut-off valve and particle filtering means. Oil from the float chamber is delivered by gravity feed to the crankcase of the associated stationary machine. When the external oil supply is depleted, the resulting movement of the float in the float chamber will produce rotation of a sealed shaft which extends into an explosion-proof chamber of the instrument to move a float position pointer therein, and to simultaneously activate an ignition cut-off switch, or equivalent pneumatic valve means in the explosion-proof chamber to shut down the stationary machine. A convenient oil level sight gage is provided on the instrument.

Abstract: A simplified and reliable shut-down device for stationary diesel engines and the like employs a solenoid whose armature is carried directly by a manually operable reset rod having a locking element therein for cooperation with a vibration-proof latch means on the shell or casing of the solenoid. A push-pull cable attached to the reset rod serves to pull the rack or other fuel control member of the engine to immediately shut down the engine responsive to spring force on the reset rod opposing the holding force of the solenoid. The device is electrically fail-safe, as any interruption of electrical power to the solenoid coil will result in immediate engine shut down.