Abstract: A pumping unit or pump jack, of the walking beam type of class I geometry, is provided which is arranged to permit relatively efficient pumping of a well inclined to the vertical, by suitable selection of beam support configuration and location, horsehead size, configuration and position, and position of the beam support fulcrum and beam length. Also provided is an adjustable pumping unit arranged to relatively efficiently pump wells ranging from about 0.degree. to 45.degree. off-vertical, in that the pitman is adjustable in length and the angle of inclination of the longitudinal axis of the samson post is adjustable.

Abstract: A duct mounting fixture for securing a duct to a generally channel-shaped support section having right angle flanges at distal ends of legs or sidewalls is disclosed. The mounting fixture includes a base plate having an outer surface defining a bearing surface for an endwall of a duct, an aperture for a latch member in a middle zone of the outer surface of the base plate, the latch member extending through an opening in the endwall of the duct and grip the endwall. Two pairs of retaining teeth are disposed on the underside of said base plate and selectively cooperable with right angle flanges on different omega- and G-shaped supports. The pairs of retaining teeth are perpendicular to each other and arranged in a generally rectangular array. Thin deformable webs on the retaining teeth restrain the fixture against inadvertent sliding movement on the support section, and thin deformable webs between the head and shank of the latch member compensate for the thickness of the duct endwall.

Abstract: A vibration-aided feed device is operatively disposed between an injection head and a mold. A feed channel is provided between the injection head and the mold for the flow of the plasticized molding material to the mold. A part of the feed channel is defined by a distribution channel running through a connecting body. A vibrating arm extends laterally from the connecting body and a vibration generator is coupled to the vibrating arm. The resulting vibrations imparted to the plasticized molding material improves the flow and distribution of the molding material and the quality of the ultimate molded article.

Abstract: A transmission member of the kind comprising a floating core free to move in all directions within a casing, the floating core comprising at least two arms disposed at an angle to one another, one for supporting a driven member, the other for actuation by a driving member, and the casing comprising an internal housing with a configuration which duplicates that of the floating core. Between the floating core and the walls of the internal housing is disposed there is disposed an insulating layer of a solid elastic material. Use of the transmission member is directed, in particular, to ultrasonic assistance in compacting or drawing.

Abstract: A cable tie comprises a strap having a series of transverse teeth on one side extending between the longitudinal edges thereof, and a fastening head having a passageway therethrough for receiving the strap to form a loop. The fastening head has a pawl cooperable with the strap teeth. The longitudinal edges of the strap are at least in part transversely oblique and each of the corresponding lateral walls of the passageway are similarly transversely oblique. The transversely oblique edge portions on the strap converge to the side of the strap away from the side having the teeth so that the pawl produces a wedging effect to clamp the strap transversely between the lateral wall portions of the passageway. Also, the lateral wall portions of the passageway converge toward each other in a direction away from the pawl. The oblique portions are preferably surface roughened.

Abstract: A piece of electrical apparatus, such as a junction box, having a body of insulating material has at least one sleeve to receive and position the screw of a connecting terminal and, projecting into the sleeve, at least one resiliently deformable protuberance, to retain the screw and prevent it from dropping out, the protuberance being formed by means of a thinned down zone of the wall of the sleeve. Further retaining means may be provided comprising one or more ribs projecting into the sleeve and extending longitudinally of the sleeve for a part of the length of the sleeve at the inner end of the sleeve.

Abstract: An electrical connector has a casing of insulating material, comprising a body and a cover which is integral with the body and pivotally connected thereto by hinge means, and a connecting blade which is projectingly carried by the cover on the inside surface thereof and which cuts through the insulation of electrical conductors laid in cradle-like housings of the body upon closure of the cover onto the body.Engagement means are provided between the body and the cover and comprise at least one guide ramp means formed on a longitudinal wall of the body and a cooperating projecting lug provided on the cover.

Abstract: A transmission device comprises a hollow casing and a core member disposed in the casing. The core member is free to move in the casing in all directions. It has at least two arms to each of which a driving member or a driven member may be connected. The arms of the core member have a non-aligned angular relationship to one another. The casing incorporates an internal housing whose configuration is a homothetic replica of that of the core member. There is clearance between the core member and the housing in all directions. At least part of each wall of the housing facing one of the arms of the core member is formed with at least one hole or recess which, by means of a network of internal conduits in the casing, can communicate with a source of pressurized supporting fluid. The transmission device is applicable to machine tools using ultrasonic, spark erosion and electrochemical machining processes.

Abstract: A self-clamping electrical connector or terminal block is disclosed having one or more entrance passages for inserting a corresponding number of conductive cores of leads. A U-shaped metal guide member is mounted in the housing and a leaf spring part with a corresponding number of leaf springs each having an angled portion extending between the legs of the guide member. The angled portion is adapted to clamp the conductive core against one of the legs upon insertion of the lead. Each leaf spring comprises clipping means including a bowed portion connected to the angled portion and a flat portion. The bowed portion bears on the inner surface of the other leg of the guide member and the flat portion bears against the outer surface of said other leg. A lug may be provided on the leg to prevent the leaf spring part from slipping off the guide member.

Abstract: An acoustic warning device of the type comprising a striker member which is also the movable core member of a control solenoid. A radially polarized permanent magnet is disposed at one end of the solenoid, e.g. opposite a gong therefor, and a spring defines with the permanent magnet a rest position of the core/striker member. The end of the core/striker member proximate to the permanent magnet is limited in its outward displacements within the axial extent of the permanent magnet means. The flux through the solenoid is carried mainly by the core member. The alternating polarization of the core/striker member ends is alternately attracted and repelled by the magnetic flux of the permanent magnet which is the equivalent of an imaginary axially polarized magnet in the passage through the solenoid.

Abstract: In a tool for tightening clamps, of the kind comprising a flexible strip and an apertured head, having a passage in which the end of the flexible strip can be engaged after the strip has been passed around a bunch of articles to be clamped together and through the apertured head, the tool being used to cut-off that portion of the flexible strip of the clamp which projects beyond the apertured head following tightening to a greater or lesser degree of the clamp around the articles, the improvement comprising a displacement member, a trigger and coupling means including a swinging link provided between the displacement member and the trigger and including a sudden release mechanism comprising a cam having a cam surface with two separate stable zones separated from one another by an unstable zone and a cam-follower maintained in contact with the cam surface of the cam, the cam and the cam-follower being relatively movable to swing said cutting lever from a rest position into a working position, one of the cam an