Abstract: A self-colleting drill that includes a pair of parallel output shafts arranged to drive a pair of drill bits and means for retaining the work piece against a foot member of the drill so that the holes will be spaced therein in accordance with the spacing between the drill bits or shafts. A plurality of drill guide members having varying hole spacings therein, provide a variety of center distances between the shafts that extend therethrough. A plurality of foot members are also provided that have mating hole spacings to the drill bushings providing for the variable drill bit spacing.

Abstract: The system described is useful in connection with a gas compressor that has a heat exchanger. Water conduits, a water pump and water control valve and cooler are connected in such a manner that the water circulated through the heat exchanger is directed to an energy consumption device wherein the heat is extracted to heat a room, office or the like. The control valve and cooler are arranged in the conduit so that the energy consumption device can be selectively bypassed by all or a portion of the water, depending on the heating demand.

Abstract: The improved decoking nozzle assembly described hereinafter includes both first and second stage decoking nozzles that can be selectively utilized. The nozzle assembly includes a hollow body having ports therein providing fluid flow to the first and second stage nozzles, a sliding valve mechanism inside the hollow body that includes apertures arranged to be selectively aligned with the ports and with the first or second stage nozzles, and a stop member that is engageable with the valve member to retain the valve member in the selected position.

Abstract: In a method of machining an upper conical surface in an annular impeller cover, a rotatable milling cutter has its cutting surface ground to an angle approximately equal to that of the desired conical surface configuration of the cover. The milling cutter is then caused to rotate and by the use of a three dimensional milling machine, the cutter is moved across the annular cover blank used for making the cover, cutting the conical surface and forming a plurality of integral vanes that project from the conical surface in circumferentially-spaced relationship.

Abstract: The inlet control valve described herein is useful in connection with pneumatic tools or the like that include a hollow tool body containing an air motor. A control valve is disposed in an inlet passageway extending to the air motor. The valve includes a first valve member that has a seal engaging an annular valve seat. A second valve member extends through a bore in the first valve member and is disposed in sealing engagement with a second annular seal member carried by the first valve member. The second valve member includes an operating member that also extends through the bore into engagement with the trigger mechanism of the tool so that displacement of the trigger to a first position tilts the second valve member off its seat permitting restricted flow through the passageway. Additional movement of the trigger displaces the first or main valve member off its seat permitting the maximum flow through the passageway.

Abstract: The pump described is of the canned motor type generally used for handling caustic materials where the motor is integrated into the pump, but must be totally sealed therefrom. The pump rotor is mounted on a hollow shaft that is supported by bearings on a hollow mandrel which has one end secured to the pump housing and the other end secured to a lug projecting from a rear shaft support plate. The lug is hollow and is provided with a plurality of ports that provide fluid communication between the motor housing and the pump inlet through the hollow mandrel. The shaft is arranged, when moved axially by the thrust developed by the centrifugal pump to open and close the ports regulating flow therethrough and thereby exerting a force on the shaft to counteract the thrust force generated during pumping.

Abstract: The silencer-separator described hereinafter includes a tank that has an inlet arranged to receive the discharge from a vacuum blower or the like, a discharge located at the opposite end of the tank, a partition located therebetween with hole extending therethrough to permit the gas to flow from the discharge of the blower to the discharge of the tank. At the lowermost end of the tank, there is provided a drain for the liquid that is separated as the air enters the tank from the blower. An overflow conduit extends from adjacent the lowermost portion of the tank, through the partition and is connected with the liquid drain. With the conduit arranged in this manner, water, which is used to seal the blower, is located in the conduit preventing sound, generated as the gas is discharged from the blower, from passing through the conduit to the atmosphere via the drain.

Abstract: A method and apparatus for containing fume emanating from the surface of molten iron or slag flowing along an open stretch of runner in a casthouse comprises directing an air curtain across the open stretch of runner.

Abstract: A gas conduit delivers gas to an electro-precipitator at an angle to the direction of gas flow through the precipitator. Projections are provided in the conduit adjacent the inlet to the precipitator to increase the thickness of the turbulent zone of the gas boundary layer; this urges gas towards upstream regions of the inlet of the precipitator, and thereby enhances even distribution of the gas across the inlet.

Abstract: An improved latching mechanism for retaining bits, such as chisels, chippers or scalers in reciprocating impact tools. The improved latching mechanism includes a latch member that is located in the hollow nose of the tool and is rotatable between latched and unlatched positions. A split spring encircles the nose and engages the latch member to prevent inadvertent rotation of the latch member and to retain the latch member in the nose. The latch member extends into the hollow nose and, when in the latched position, engages the bit to retain the bit in the tool while permitting limited reciprocating movement of the bit. When in the unlatched position, the latch member frictionally engages the bit to inhibit inadvertent discharge of the bit, while permitting intentional insertion and removal of the bit.

Abstract: A neutron generator in a well logging instrument is periodically pulsed and has an off period between pulses of 1000 microseconds. A neutron detector is gated on at intervals of 400-500, 550-650, and 700-800 microseconds, respectively, following the termination of each burst of fast neutrons. Circuitry is provided for determining the background radiation by the equation: ##EQU1## where B is the background, and N.sub.1, N.sub.2 and N.sub.3 are the counts observed during the three gates, respectively. Circuitry is also provided for determining the macroscopic absorption (.SIGMA.) from the equation: ##EQU2## where V is the velocity of thermal neutrons, being a constant and .DELTA.t represents an increment of time.

Abstract: A pneumatic powered screwdriver adapted for moderately high speed operation and automatic shutoff at relative low torque turning resistance. An axially disengageable clutch unit intermediately couples the motor drive to the output drive bit. Contained in the clutch unit is an improved shutoff and reset mechanism which is cam shifted radially in response to clutch disengagement for enabling air supply interruption to the motor and automatically and positively reset for enabling subsequent operation.

Abstract: A method of expanding a tube into engagement with a header wherein the expander is permitted to move longitudinally a predetermined amount relative to the tube while the expander is being rotated and expanding the tube into engagement with the header. The tube expanding apparatus includes a rotatable expander for insertion into the tube to be expanded, a stop collar that engages the header, a thrust collar that is fixed relative to the expander and a spring disposed between the stop collar and thrust collar permitting the thrust collar and expander to move relatively into the tube as the expander is rotated.

Abstract: The improved locking means includes a pair of shaft mounted gears that are in mesh with the thread on the exterior of the feed screw mounted in the housing of a positive feed drill. On the opposite ends of the shafts are mounted gears which rotate with the shafts. When the drill tool holder is not to be advanced, the gears and shafts rotate as the feed screw is being rotated and thus do not cause axial movement of the feed screw as the feed screw rotates. A rack gear is located in the housing adjacent the spur gears. A pressure actuated piston is provided to move the rack gear into engagement with the spur gears to lock the spur gears and shafts against rotation. When this occurs, the gears in mesh with the thread on the feed screw act as a fulcrum so that the feed screw and tool holder are moved axially as the feed screw rotates.

Abstract: An improved flushing and cooling system for shaft seals that are located in cavities in the pump housing includes inlet and discharge ports extending through the housing into the seal cavities and a pumping ring seal that is arranged to circulate the fluid through the inlet port past the seal and outwardly from the outlet port into the housing of the pump. Both ends of the housing can be provided with such a system and the systems interconnected internally of the housing to balance the pressure therebetween.

Abstract: A wellbore logging instrument is disclosed of the type having a density pad maintained in close proximity to the tool body, and a decentralizing arm pivotally mounted on the body and arranged to swing outward against the borehole to move the tool body and density pad against the opposite borehole wall. The apparatus includes a linkage assembly to provide a slight extension of the density pad at any selected time in the borehole.

Abstract: An elongated borehole logging instrument includes a permanent magnet linear reciprocating motor. The motor powers a sliding sleeve which has attached to its outer perimeter a series of reversible vanes. The vanes engage the mud cake or the borehole wall and thus generate a force opposite to the direction of the vane slant. The motor has a stationary electromagnetic field comprised of a plurality of coils connected to the control electronics. The floating outer sleeve has permanent magnets all oriented in the same direction. As the coils are pulsed alternatingly, the magnets are either repulsed or attracted to thus generate a reciprocating motion which transferred to the vanes moves the tool up or down, depending upon the position of the reversing actuator. The control electronics is responsive to the difference between the velocity of the well logging instrument, functionally related to its acceleration, and the velocity of the well logging cable at the earth's surface.

Abstract: An oilwell swab cup is formed by clamping a plurality of vertical wire members in a circular U-shaped cup and molding an elastomeric material around the wires and cup.

Abstract: An oil well swab cup with improved wear characteristics utilizes a single integral reinforcing structure featuring a wear surface forming a substantial portion of the external surface of the cup.

Abstract: A rotary impact tool having a fluid operated motor with a hammer slidably mounted with respect to the rotor and rotatable therwith, an anvil normally spaced axially from the hammer, force transmitting means for transmitting rotation of the rotor to the anvil and for moving the hammer toward and away from the anvil for rotary impact therewith without imposing axial forces on the rotor, except for inconsequential frictional forces between splines.