Abstract: A combination rasp and file for laminate materials of the type including a top plastic layer includes a rasp side having a multiplicity of rasp teeth formed for removing plastic and wood effectively but without leaving an unacceptably rough finish. The rasp teeth are formed 15 teeth per row with 16 rows per inch at at least the belly of the tool. The rasp teeth have a face angle of 20.degree., a back angle of 35.degree. and a gullet angle of 53.degree.. A chisel cut file side has teeth formed for smoothing the work of the rasp and is formed with 34 teeth per inch oriented at 25 degrees to the transverse axis of the tool. The chisel cut teeth have a face angle of -6.degree., a back angle of 37.degree. and a gullet angle of 61.degree..

Abstract: An interrupter includes a vacuum assembly, switching contacts enclosed within the vacuum assembly, a layer of compliant material around the vacuum assembly, and a layer of rigid encapsulation surrounding the vacuum assembly and layer. The vacuum assembly may be made from ceramic, the compliant material may be silicone, and the rigid encapsulation may be epoxy. The compliant material may also be a sleeve that is expanded so as to receive the vacuum assembly.

Abstract: A torch valve for pressurized fuel includes a valve body having a central, axial bore and a valve needle threadedly mounted in the bore for selectable axial positioning in the bore. A inlet portion of the bore forms an inlet connectable to a source of pressurized fuel. A second portion of the bore carries the valve needle. An outlet passage communicates with the bore at a point approximately where the second portion joins the first portion. The outlet passage extends laterally from the bore to open at an outlet orifice on the outer surface of the valve body. The outlet orifice includes means for attaching a torch and igniter assembly to the valve body. The needle includes a stem that terminates in a needle tip. An annular ridge extends from the stem spaced from the tip and defines a first groove between the ridge and stem. A second groove is formed in the stem spaced from the first groove. Each of the first and second grooves carries a resilient sealing ring.

Abstract: A liquid filled cooling fin generally comprising two, roughly rectangular, opposing fin walls separated by a relatively thin liquid space or chamber. The opposing walls are sealed at both ends along the depth of the fin and at one of the two edges along the height of the fin. The second, open edge of the fin is attached along the height of the fin in a liquid tight seal to a tank in which a transformer or other heat generating device to be cooled is submerged in a cooling fluid. The tank is provided with holes or other fluid passages so that cooling fluid can circulate between the tank and the fin. Cooling fluid is heated in the tank by the transformer and flows from the tank to the cooling fins, where it is then cooled by transferring heat through the fin walls to ambient air. The cooled cooling fluid then circulates back to the tank, completing a circulation pattern which is continuously repeated in operation.

Abstract: A portable electric soldering tool includes a housing forming a handle and a power head. A heating rod extends from the power head, the rod having an axial bore with a stainless steel lining to prevent solder from building up in the heating rod. A heating coil heats the heating rod. The heating rod directs melted solder into an extraction tube in which a curved wafer is disposed to collect the solder. A diaphragm pump is mounted in the power head and has an oblong piston head, which is mounted with the long axis aligned on a longitudinal axis of the tool, which facilitates a more compact unit.

Abstract: A pad for supporting a transformer is described, which comprises: a molded polymer body having front, rear, left and right surfaces, canted top surfaces, a sill adapted to engage a transformer cabinet door, and a pedestal to support and elevate a transformer tank. In one embodiment, the sill is formed integrally with the body, the sill being generally U-shaped, including a front section and left and right side sections and extending between about 0.5 and 6 inches above said top surface of the body. The pedestal may also be formed integrally with the body, the pedestal being generally rectangular in shape, incorporating transformer mounting flanges, and extending between about 0.5 and 6 inches above said top surface of said body.

Abstract: A trim-ring auxiliary member system for capturing and supporting an auxiliary member relative to an interior and an open end of a lighting housing. The housing includes an annular groove formed in an interior of the housing. The groove is axially spaced from an open end of the housing. A support spring member is removably secured to the interior of the housing and disposed within and retained by the groove. A connecting spring removably attaches the auxiliary member to the support spring member.

Abstract: The present invention is directed to a self-contained desoldering gun having a built-in vacuum pump. The vacuum pump is operated by a low voltage electric motor which is electrically connected in at least partial series with a heating tip. The heating tip reduces the voltage in the circuit and reduces the size of the motor required to operate the pump. In exemplary embodiments, a portion of the heating tip which is not in partial series with the motor is electrically connected in parallel with the motor. In alternate embodiments, the heating tip can include separately formed first and second heating elements, the first heating element being connected in parallel with the motor and the second heating element being connected in series with the motor. Such a configuration allows the second heating element to be energized only when the motor of the vacuum pump is energized.

Abstract: A novel protective cap or elbow connector comprises a semi conductive insert which includes an additional volume of air which surrounds energized portions of the elbow connector or protective cap beyond what is necessary to accommodate a female bushing. During separation of the elbow connector or protective cap from the female bushing, the semiconductive insert stretches, which increases the volume of the interior space between the elbow connector or protective cap and the female bushing. Because the additional volume of air is provided, the reduction in pressure during separation is lessened, so that the dielectric strength of the air surrounding energized portions of the elbow connector or protective cap is maintained at a higher level. The increased dielectric strength of the air significantly reduces the possibility of a flashover occurring during separation of the elbow connector or protective cap from the female bushing.

Abstract: A circuit breaker panelbox includes a circuit breaker receiving area for receiving a plurality of circuit breakers; a sliding arm for each of the plurality of circuit breakers, each of the sliding arms including a device for engaging a toggle switch of the respective circuit breaker; a frame for supporting the sliding arms such that the sliding arms can slide with respect to their respective circuit breakers; first and second contacts on each of the sliding arms at spaced locations; and an actuator for each of the sliding arms, the actuator including a device for contacting one of the first and second contacts of the respective sliding arm in order to actuate the respective circuit breaker.

Abstract: An improved turbine engine ignition exciter circuit. Energy stored in an exciter tank capacitor is subsequently switched to the load (igniter plug) through a novel thyristor switching device specifically designed for pulse power applications. The switching device is designed and constructed to include, for example, a highly interdigitated cathode/gate structure. The semiconductor switching device is periodically activated by a trigger circuit which may be comprised of either electromagnetic or optoelectronic triggering circuitry to initiate discharge of energy stored in exciter tank capacitor to mating ignition lead and igniter plug. Likewise, the present invention allows new flexibility in the output PFN (Pulse Forming Network) stage, eliminating need for specialized protective output devices such as saturable output inductors. Due to considerably higher di/dt performance of the device, true high voltage output pulse networks may be utilized without damage to the semiconductor switching device.

Abstract: A novel male connector for an electrical connector assembly comprises an elastic housing which includes a recess for receiving the end of a female connector. When the male and female connectors are connected, a cavity is formed between the female connector and the recess of the male connector. Along the length of the recess, a rigid member is provided in the male connector which prevents the recess from stretching substantially when the male connector is disconnected from the female connector. Because the recess is prevented from stretching, the air pressure in the cavity between the male connector and the female connector remains relatively high during disconnection. The dielectric strength of the air in the cavity, which is a function of pressure, also remains high, so that the possibility of flashover is substantially eliminated.

Abstract: A peck feed drill incorporates a motor gear quill and a feed control assembly together on a moving race track shaped piston. External construction of the housing permits mounting of an indexing adaptor plug for attachment of drill bushings. Internal construction of the housing provides for passage of air to the various components to which control tool operation. Valves within the air logic circuitry are multi-functional to minimize the number of parts.

Abstract: A valve for regulating a flow of pressurized gas in a torch includes a valve body having a central bore and a connected outlet bore for passage of gas from a source to a torch tube. A valve needle is disposed in the central bore and is movable to open and close the central bore from the outlet bore. A valve seat is formed in a portion of the central bore and an end face of the valve needle faces the valve seat. A bonded elastomer seal is loosely disposed between the end face and the valve seat. When the valve needle is in the closed position, the end face compresses the bonded elastomer seal on the valve seat which closes the central bore from the outlet bore.