Abstract: A force limiting weld head (11) which includes a supporting structure (13), a pressure barrel (15) and an output member (17) mounted for movement on the supporting structure, a fixed electrode (19) mounted on the supporting structure, a movable electrode (21) driven by the output member, a coupling (23) for drivingly coupling the pressure barrel and the output member. The coupling includes a variable-volume chamber (89) and a piston (77) responsive to overtravel for varying the volume of the chamber.

Abstract: A flexible ammunition chuting (14) for a machine gun (10) includes a flexible spine (26) made up of spring steel strips (27, 29) which are anchored at two spaced and fixed positions, typically at the chuting ends, so as precisely to define the length of the chuting. The chuting includes relatively articulated links (20), which are able to follow convex and concave bends and to twist torsionally, but the spine (26) prevents the overall stretching or collapse of the links, which might result in ammunition belt misfeed or jamming.

Abstract: Wire bonds are closely spaced about the edge of a semiconductor chip device (150) in an orthogonal array. Even though the wires may have a fan out pattern to their second bond locations, close spacing of the first bond pads is achieved by use of rectangular pads (154) having their long dimensions all perpendicular to the chip edge, making all of the first bonds along lines perpendicular to the chip edge and then bending the wire to extend to the second bond.

Abstract: An improved continuous polymer filter of the screen belt type employs a valve arrangement to selectively apportion the extruder output flow through at least two filter paths. In the neutral valve position both filter paths receive polymer at equal flow rates creating a pressure across the screen belts that is too high to permit the screen belts to be advanced when a clogged belt section requires replacement with a clean section. To effect screen belt advancement, the valve is actuated to reduce the flow rate in the filter path requiring the replacement while increasing the flow rate to the same degree in the other filter path so that the net flow rate remains substantially constant. The screen belt receiving the reduced flow experiences a sufficiently reduced pressure drop thereacross to permit it to be advanced in a conventional manner, after which the valve is returned to its neutral state.

Abstract: A movable open center mounting for the tool of an ultrasonic wire bonding machine employs ball-bearing rollers (22, 24, 30, 32) to permit limited motion of the wire bonding tip (13a) substantially constrained to a vertical line with a minimum of tip skid. The mounting structure which is all positioned on one side of the tool tip includes a frame (10) of inverted U-shape having a pair of mutually spaced ball-bearing rollers (22, 24, 30, 32) on the end of each frame leg and a transducer support (12) positioned between the frame legs and having fixed roller contacting rods (90, 92, 96, 98) extending fore-and-aft between and partly under each of the respective rollers.

Abstract: Products which are useful as detergent builders and which do not contain nitrogen or phosphorous atoms are described. Such detergent builders comprise one or more compounds of the Formula I-V below:[MOOCCH.sub.2 (MOOC)CHOCH.sub.2 ].sub.2 CHOCH(COOM)CH.sub.2 COOM (I)HOCH.sub.2 CH(OH)CH.sub.2 OCH(COOM)CH.sub.2 COOM; (II)HOCH.sub.2 CH[OCH(COOM)CH.sub.2 COOM]CH.sub.2 OCH(COOM)CH.sub.2 COOM; (III)MOOCCH.sub.2 (MOOC)CHOCH.sub.2 CH(OH)CH.sub.2 OCH(COOM)CH.sub.2 COOM; (IV)orHOCH.sub.2 CH[OCH(COOM)CH.sub.2 COOM]CH.sub.2 OH (V)wherein M is a salt-forming cation or hydrogen or mixtures thereof. Such compounds and/or mixtures thereof are produced by reacting glycerin with maleic acid (or a source thereof) in the presence of an alkaline earth metal hydroxide.

Abstract: A bonding tool and clamp assembly is disclosed and includes an upper wire guide (23,51) and a bonding tool (17,75) having a short guide hole (45) adjacent the heel of the bonding tool foot (41). The bonding tool tip (17a) includes a clamping surface (47) adjacent the guide hole (45); and a clamp (21b,49b) is selectively forced toward the clamping surface (47) to clamp the bonding wire (39,77). The clamp (21b,49b) is biased toward the clamping surface by a spring (37,73), and is released from the clamping surface by an electromagnet (29,57).

Abstract: A flexural pivot structure useful in a wire bonding machine bonding head (10) is disclosed and includes first and second leaf spring assemblies (39,41) which provide a pivot axis (PA) displaced from the pivoting structure. Each leaf spring assembly includes leaf spring arms (39a,39b,41a,41b) extending outwardly from a central mounting position (39c,41c) so that each assembly forms a truncated vee. The center portions of the leaf springs are secured to a transducer bridge (25) in which a transducer (59) is mounted. The ends of the leaf springs are secured in a bracket (11) with respect to which the transducer (59) pivots about an axis located at the intersection of converging lines along the leaf springs (39a,39b,41a,41b) of each leaf spring assembly (39,41).

Abstract: Sheath-core bi-component fibers are formed by an improvement of the method and apparatus described in U.S. Pat. No. 2,936,482 whereby molten sheath polymer is issued in ribbons into a recessed portion of the top surface of the spinneret from locations between rows of raised spinneret channel inlets. Ribbon flow of the sheath polymer is achieved in slot-like channels which are inter-leaved with rows of core polymer flow passages to optimize space utilization and spinneret channel density. Filtering of the core and sheath polymer is achieved in separate manifolds leading to the core flow passages and sheath slot-like flow channels which are kept to minimal length to minimize polymer residence time downstream of the filters.

Abstract: An efficient and practical process is provided, permitting greatly increased recovery of hydrocarbons from oil shales and tar sands. Steps involved include mixing oil shale or tar sand in water, with pulverized coal, to form an amalgam, and separation of water to be reused in the process. The separated amalgam contains the hydrocarbons of the shale or sand and constituents of coal in which mineral matter content is considerably reduced.

Abstract: In an open-end spinning process wherein staple fibers are continuously fed to an air vortex and wherein a yarn tail extends into the vortex whereby the fibers affix themselves to and lengthen the tail, the yarn tail is driven at a faster revolution rate than the tail would be driven by the vortex alone by means of a rotary driven member.

Abstract: In combination, a drawing apparatus and a crimping apparatus. The drawing apparatus comprises integral first and second draw rolls, with attendant separator rolls, and a draw pin. The final draw roll is fluted around its peripheral surface. The draw rolls are driven from the same source as the crimp feed rolls, and in order to control yarn tension at the crimp feed rolls a variable drive means is provided for the draw rolls, to alter their speed with regard to the speed of the feed rolls. A yarn heater is positioned between the final draw roll and the crimp feed rolls, or in the alternative, between the final draw roll and its separator roll.

Abstract: In the well-known technique of disinfecting caries-infected or potentially caries-infected dental tissue with silver nitrate, silver thiocyanate or its complexes have been substituted for silver nitrate with excellent disinfecting results and lowered side effects, e.g., with lowered toxicity toward dental tissues and mouth membranes and less blackening of exposed portions of the teeth.

Abstract: A method and apparatus for texturing continuous filament yarn wherein the yarn is fed at a controlled rate and under controlled tension by a pair of feed rolls into a confined crimping zone against a mass of crimped yarn therein, causing the yarn to collapse longitudinally to form crimps which become part of such mass. Heat and pressure are applied to the yarn mass in the crimping zone to plastically deform the yarn and partially set the crimps. The crimped yarn mass is then fed at a controlled rate by means of toothed rolls from the crimping zone into a setting zone. Heat and pressure are applied to the yarn mass in the setting zone to fully set the crimps. The yarn mass is moved through the setting zone by an endless belt having upstanding teeth that positively engage the yarn mass. The pressure applied to the yarn mass in the setting zone is substantially sufficient only to keep the crimps closed during the final setting thereof. The crimped yarn mass is then fed from the setting zone into a cooling zone.

Abstract: A fishing lure which comprises an elongated generally cylindrical body including opposite ends, one of which is hemispherical and the other of which is provided with intersecting sloped surfaces which intersect along a line forming one extremity of the lure. Hooks are connected to the body as, for example, centrally of the same and at one end thereof. The body is provided with a concealed weight which, due to the hemispherical form of the body is enabled to extend substantially to one extremity of the body. The sloped surfaces perform two functions, namely, that of improving aerodynamical design and of improving the performance of the lure when retrieved along the surface of the body of water.

Abstract: A method and apparatus for texturing continuous filament yarn wherein the yarn is fed at a controlled rate and under controlled tension into a confined crimping zone against a mass of crimped yarn therein causing the yarn to collapse longitudinally forming crimps which become part of such mass. Heat and pressure are applied to the yarn mass in the crimping zone to plastically deform the yarn and partially set the crimps. The crimped yarn mass is then fed at a controlled rate from the crimping zone into a setting zone. Heat and pressure are applied to the yarn mass in the setting zone to fully set the crimps. The pressure applied to the yarn mass in the setting zone is substantially only sufficient to keep the crimps closed during the final setting thereof. The crimped yarn mass is then fed from the setting zone into a cooling zone.

Abstract: Formation and liquid-filling of plastic bags is performed in a continuous high speed and low cost process. Plastic film is extruded in tubular form and inflated with air or another gas. The tube is transported along a path of work stations at which the tube is successively: sealed to define a series of inflated sections; filled with liquid, while inflated, by a large size hypodermic-type needle configured to puncture and displace entrapped gas with fill liquid, the displaced gas escaping around the needle; seamed to seal off the needle-hole from the liquid-filled portion of the bag; and cut to separate the individual bags, if desired.

Abstract: Improvements are set forth in connection with analgesic and antifebritic or antipyretic compositions, tablets with solid medicaments, and methods of preparing such compositions and tablets. Medicament particles, such as aspirin particles, for instance, and pectin or gum particles are included as main constituents in mixtures in which the pectin or gum serves to prevent undesirable side effects and in which coated and uncoated or exposed surfaces of medicament, or specifically aspirin, particles can be proportionately varied to vary or extend periods of medicinal activity of the medicament, or aspirin. In the methods of preparation, water can be included with or without water carriers and proportioned in a mix to soften the pectin or gum while maintaining the mix in a pourable state. On compression, a mix can be readily formed into tablets.