Abstract: An injection moldable composite comprising an admixture of a polyetherketone such as polyetheretherketone (PEEK) matrix resin, a metal filler such as stainless steel fiber coated with a resin sizing soluble in the matrix resin, and glass fiber. The resulting molded form of the composite being electrically conductive and aluminum galvanic compatible.

Abstract: An electro-pneumatic transducer converts an electrical input signal into a proportional (direct or indirect) pneumatic output signal. A circuit will sense the magnitude of the input signal, monitor the output fluid pressure and adjust a piezoelectric beam voltage until a desired output fluid pressure is achieved. The output fluid pressure is controlled by the deflection of a piezoelectric beam which is polarized and will deflect with an applied voltage. The output fluid pressure is monitored by a pressure sensor.

Abstract: An adjustment device to move a pump rotor assembly to effect desired impeller clearance without causing misalignment. The arrangement provides for rigid contact between bearing housing and frame and for sealing to protect the device from exposure.

Abstract: The centrifugal pump having a closed type impeller with two cover discs and vanes therebetween. The inner parts of the vanes cooperate with a non-rotating insert part for cutting within the pump inlet. The lower cover disc together with the non-rotating insert part in the pump inlet creates a radial seal.

Abstract: A wire wand is inserted into a pressure sensor perpendicular to the sensor's operating axis. The wire wand is fixed and adjustable at one end and driven at the other end by the sensor. The arrangement provides for deadband adjustment of a pressure switch.

Abstract: An adjustable shaft mechanism for adjusting the gap between a print head and a platen in a dot matrix printer has a printer frame with two end frame members and a fixed guide member. An adjustable shaft runs substantially parallel to the guide member between the end frame members. A print head carriage runs along the guide and shaft members. A substantially vertical slot in each of the end frame members is employed to adjust the adjustable shaft for movement up and down with respect to the end frame members. Spring loading means biases the shaft toward the guide member. A cam on each end member is mounted for rotation for adjusting the shaft in the slots to raise and lower the print head carriage and the associated print head with respect to the platen.

Abstract: A flushing protection arrangement is provided between the static seal and the auxiliary impeller, so that when the pump is not operating the static seal will be protected by a flushing fluid.

Abstract: An impeller for pumps, turbines, fans, etc., of the closed type, having a number of vanes arranged between cover discs. In order to reduce the secondary flows within the impeller, the secants between the suction side of the vane and the cover discs are displaced with respect to the intersections at the pressure side of the vane. This impeller is rotationally non-symmetrical.

Abstract: A tank leak detection system in which a liquid level multiplier is connected to a differential pressure transmitter one side of which may be piped back into the tank to compensate for internal changes in tank pressure. A capillary having a small bore connects the transmitter and the multiplier to reduce temperature effects. Changes in tank temperature may be sensed, i.e., by a long bulb thermometer and either fed to a temperature transmitter to convert temperature change into a single to a computer used to calculate true tank level and output a signal proportional thereto or fed to the level transmitter to compensate for temperature changes.

Abstract: Tandem mounted face seals for use in centrifugal pumps with dynamic seals. One face seal has a flexible lip and the other face seal has a non-flexible lip to ensure sealing at high static or dynamic pressures.

Abstract: A cable (1) entering a submersible machine, such as an electrically driven pump, a turbine etc., is surrounded by a collar (3) of a rigid material, and the collar (3) is secured to the machine shell (2) by bolts (4). Two sockets (5) and (6) of an elastic material surround the cable (1), one of them mounted in the shell (2) and the other in the collar (3). A ring (8) of a rigid material is arranged between the two sockets (5) and (6). The collar (3), during mounting, is moved towards and into contact with the shell (2), thereby causing the sockets (5) and (6) to be compressed axially and expanded radially so that the cable (1) is secured and sealed.

Abstract: The pressure side of the pump unit is provided with a valve (6) which during certain periods opens a connection between the pump and the pump station to obtain circulation in the station. The valve (6) is opened and closed by a valve ball (9) which is controlled by the pump pressure.

Abstract: Apparatus is described for a searchlight in which a lamp is mounted in a housing for both vertical and horizontal movement. Vertical drive means which is mounted in the housing includes a gear having a tooth portion and a ramp portion to permit up and down movement of said lamp. The housing has an integrally formed ring gear with a tooth portion less than 360 degrees and a ramp portion. A horizontal drive means engages the ring gear and drives the lamp in a horizontal plane less than 360 degrees.

Abstract: A potentiometer position switch circuit which includes a meter mechanism having a low friction potentiometer coupled to move therewith. The output of the low friction potentiometer is coupled together with the output of a set point potentiometer across the input terminals of a comparator. A magnetic latching double pole, double throw relay having set and reset relay coils is connected to the output of the comparator through the gate of a first voltage operated transistor and through sufficient resistance to minimize current drain and also through an invertor to the gate of a second voltage operated transistor and through a second resistor of sufficient resistance to minimize current drain. The output of the first voltage operated transistor is connected from a second voltage source through the set relay coil to ground and the output of the second voltage operated transistor is connected from a voltage source through said reset relay coil to ground.

Abstract: The invention concerns a method to control the stops of an intermittently operating electric motor. The motor current is measured at even intervals and a mean value is created from the measured values. An actual value is compared with said mean value and a signal is given to stop the motor if the actual value deviates from the mean value a predetermined amount. Each new measured value replaces the first measured value in the series.

Abstract: A device is provided for obtaining automatic circulation in waste water pump stations. At the pressure side of the pump unit, there is a valve which opens during certain times to form a connection between the pump and the pump station to create a circulation. The valve is opened and closed by means of communicating bellows which are controlled by the pressure difference between two sections in the valve having different areas.

Abstract: A centrifugal pump has a floating casing ring which is deflectable in response to contact by an impeller of the pump.

Abstract: A pressure/differential pressure measuring device having a range plate with static and differential pressure sensors mounted therein. A high pressure isolation plate is mounted on one side of the range plate with a high pressure diaphragm mounted on the side of the high pressure isolation plate away from the range plate and sealed thereto forming a first fluid chamber between the inside of the high pressure diaphragm and the high pressure isolation plate side of the sensor assemblies. A low pressure isolation plate is mounted on the other side of the range plate with a low pressure diaphragm mounted on the side of the low pressure isolation plate away from the range plate and sealed thereto forming a second fluid chamber between the inside of said low pressure diaphragm and the low pressure isolation plate side of the sensor assemblies.