Abstract: An oil well drilling rig mover is formed from a pair of laterally spaced dollies detachably connected by braces between them. Each of the dollies includes a beam for resting on a support, and a pair of laterally spaced wheels at each end of the beam. An arm extends outwardly from the outer end of a tiltable support member that is pivotally connected to the end of the beam beneath it. The arm can be connected to the support member in either of two laterally spaced positions. Extending downwardly from the outer end of each arm is a rotatable shaft, the lower end of which is connected to the central portion of the axle for the wheels. The support members at the opposite ends of a beam can be tilted away from each other to lift the beam. The two beams and the braces between them form a skid base for a drilling rig which can be moved laterally by turning the shafts 90 degrees.

Abstract: An electronic circuit for processing measured values obtained from a vortex sequence produced by a Karman vortex path, wherein the ultrasonically sensed signals are processed both digitally in a first circuit branch for a computer and analogously in a second circuit branch for the connection of a two-channel continuous recorder. An adjustable frequency transforming arrangement is serially connected in the computer branch for balancing the circuit, and an additional frequency-voltage converter and and integrator are serially connected in the recorder branch along with a control logic circuit inserted between the two branches for starting the recorder after activation of the computer only when signals which can be evaluated are present.

Abstract: A hollow plunger is slidable vertically in a housing that has an open upper end, but its upward travel is limited to a predetermined elevated position, in which the lower end of the plunger body is spaced above the housing's bottom wall that holds a pair of opposed spring contact strips that extend below it to form terminals and that also converge upwardly inside the plunger and have upper ends urged toward engagement with each other. Loosely disposed inside the plunger is a shuttle provided with a cross member extending between the contact strips. The inside of the plunger is formed for supporting the shuttle while the plunger is held in its elevated position by a coil spring encircling the contact strips with the shuttle cross member spreading the upper ends of the contacts apart. After the plunger has been depressed a predetermined distance, it starts to move the shuttle downwardly with it.

Abstract: A rotatable member is provided with an axial bore that receives one end of an undersized shaft. To fill the space between the shaft and the wall of the bore and to center the shaft in the bore, the portion of the shaft that is in the bore is encircled by a sleeve provided with a longitudinal slot extending outwardly from its inner end. A set screw threaded in the rotatable member extends through the slot and tightly engages the shaft to rigidly connect the rotatable member and shaft together.

Abstract: A die stem and a billet-receiving sleeve extend rearwardly from an extrusion apparatus platen slide that is movable laterally from a first position in which the stem is aligned with a billet container passage behind it to a second position in which the sleeve is aligned with the passage. An extrusion stem behind the container is movable forward through the passage, and there is means behind the sleeve in the first position for pushing a hot billet into the sleeve. A die slide carried by the container and holding a die is movable laterally across the container from an inner position aligned with the container passage when the platen slide is in its first position to an outer position aligned with the die stem in the second position of the platen slide. In the sleeve there is means for pushing a billet out of the sleeve in the second position of the platen slide and into the container as the container is moved forward toward the sleeve.

Abstract: A keyswitch includes a tubular plunger with a body slidable vertically in an open-top housing that has a bottom wall supporting the lower end of a coil spring extending up around a pair of opposed upright spring contact strips, the lower ends of which extend through the bottom wall. The inside of the plunger is provided with a cross member that normally separates the upper ends of the contact strips, but permits them to engage each other when the plunger is pushed down. The contact strips are substantially identical. Each has at least two parallel slits extending downwardly from its upper end to form a plurality of narrow contact fingers beside a wider contact finger that is wide enough to be engaged by the narrow contact fingers of the opposing contact strip.

Abstract: A slide is movable by an actuating knob back and forth in a rectangular housing and is attached to a movable metal contact below it by elements integral with the slide. The contact is pressed downwardly by a spring mounted in a bore in the slide. The housing, slide and knob are molded from insulating material. A pair of stationary electric contacts are mounted in the bottom of the housing in positions to be bridged by the movable contact when the slide is in a predetermined position in the housing. The slide may be provided inside the housing with a pair of integral resilient indexing prongs extending laterally into notches in the side walls of the housing.

Abstract: A safety push rod assembly includes a vertical sleeve adapted to extend through the marginal portion of the bonnet of a rotary container filling machine, in which the sleeve is rigidly mounted. Slidably mounted in the sleeve and extending above it is a tubular upper rod that supports a container rest, and slidably mounted in the upper rod and extending down below the sleeve is a lower rod provided with a transverse passage therethrough inside the upper rod, with a detent ball in each end of the passage and with an axial bore extending from the upper end of the rod down to the transverse passage. In the lower end of the bore and resting on both detent balls is a center ball pressed downwardly by a coil spring compressed between that ball and a stop in the upper end of the bore for urging the detent balls into engagement with the encircling upper rod that is provided with an annular groove receiving projecting portions of the detent balls to thereby normally hold the push rod assembly in extended position.

Abstract: A line of detachably connected skid frames is laid down at a first drilling position for supporting an oil well drilling rig having a base seated on the frames with some of them extending away from opposite ends of the base. After the well has been completed, the rig is skidded along the line of frames to one or more nearby drilling locations, but for movement to a more distant drilling location, some of the skid frames then are temporarily attached to the bottom of the base and disconnected from the rest of the frames. Then wheels are attached to the opposite ends of the base, which is raised along with the attached skid frames relative to the wheels to lift the rig. After towing the wheel-supported rig over the ground to a new drilling location, it is lowered until the skid frames attached to it rest on the ground again.

Abstract: An actuating member in an electric switch housing is provided with a bore that opens downwardly inside the housing and contains a plunger slidably mounted therein and projecting from the lower end of the bore. A coil spring in the bore presses the plunger down against a movable contact to press it against stationary contacts. The plunger and movable contact are interconnected for movement of the contact by the actuating member, and the actuating member and plunger are provided with interengaging means for limiting downward movement of the plunger in the bore in the absence of the movable contact, whereby the plunger cannot escape from the actuating member.

Abstract: The permanent magnet fields encircling the armature of a direct current motor are encircled by a pair of radially spaced cylindrical metal members separated by a cylindrical dielectric member. One of the metal members and one of the brushes that engages the commutator of the motor are grounded. The other brush and the other cylindrical metal member are connected to a direct current power supply, whereby a capacitor is formed by the three cylindrical members for suppressing radio frequency noise generated by sparking of the brushes at the commutator.

Abstract: A switching circuit for monitoring the switching state of switching elements wherein the switching state of the switching element is detected and a corresponding signal is generated and this signal is compared to the input signal initially provided for switching the switching element from one switching state to another whereby a fault signal is produced when the switching state monitor signal indicates that the switching element is in one switching state and the input signal indicates that the switching element is or should be in another switching state.

Abstract: A hauling vehicle in the form of a so-called terminal tractor intended for transporting containers, but which also can be used for transporting different kinds of trailers provided only with rear wheels, is two-axled and provided at its rear end with connecting means designed to provide essentially rigid interconnection of the vehicle frame with the front end of the container or trailer to be hauled. The rear wheels of the hauling vehicle are steerable as well as drivable from the driving motor of the vehicle. The rear axle is connected to the vehicle frame by means, e.g., hydraulic cylinders, enabling adjustment of the vertical position of the vehicle frame relative to the rear axle. After the rear end of the vehicle frame has been rigidly interconnected with the front end of the container, the vehicle frame can be raised relative to the rear axle, whereby the front end of the container is lifted up into the air.

Abstract: A shear wall of a building is tied down to an underlying concrete slab by a single tie rod at each end of the wall. The upper end of each rod is secured to a bracket attached to a shear wall stud, and the lower end of the rod extends through a slot in the upper flange of a channel-like lower bracket. The lower flange is provided with a plurality of slots extending in a common direction and up through which bolts anchored in the concrete foundation extend. The upper slot in this lower bracket extends in a direction at a right angle to the lower slots, and at least one of the several slots extends lengthwise of the shear wall. The slots in the bottom of the lower bracket permit its adjustment on the foundation to position it for receiving the lower end of the rod in the upper slot.

Abstract: A tap, particularly for drinking fountains, has a plunger 17, operated by a toggle 24 and carrying a compressible valve member 19. The valve member 19 cooperates with a seat 16. In order to simplify replacement of the compressible valve member 19, the seat 16 is formed on a receivable carrier 11 which is sealingly and slidably mounted in the valve body and is removable with the plunger when the locking ring 12 is removed.

Abstract: Suspended from a carriage that straddles a standing seam, in which the upper portions of adjoining upright flanges are interlocked, is a vise having a pair of normally spaced jaws with a short length of the standing seam between them. One of the jaws is rigidly connected to the carriage, but the other jaw can be moved toward and away from the first jaw by a fluid pressure cylinder supported by the carriage. The movable jaw is moved toward the other jaw periodically to compress and close the interlocked upper portions of the seam. Each time the jaws are separated the carriage can be moved along the seam in order to close an adjoining length of the seam. Preferably, the carriage is moved along the seam automatically by means of motor-driven rollers that frictionally engage the standing seam. The rollers are rotated to move the carriage only while the vise is released from the seam.

Abstract: An exhalation valve for inhalation therapy includes a base member provided with an exhalation port encircled by a valve seat for a valve closure disc, the center of which is connected to the inner end of a pin extending outwardly away from the disc and slidably mounted in a sleeve spaced from the disc. The sleeve is held rigidly by a support connected with the base member. A number of Constant-Force Compression coil springs extend between the sleeve and disc and are bowed outwardly away from the pin. The ends of the springs are connected with the sleeve and closure disc to urge the disc toward the valve seat. The springs exert a substantially constant pressure against the disc as it is moved outwardly away from the valve seat by air flowing out through the valve port.

Abstract: A replaceable liner for a crucible for molten metal consists of an open-top receptacle having at least its side wall made of graphite foil formed earlier by compressing expanded graphite.