Abstract: In order to facilitate the stitching of a finding such as a hook or an eye with two or three spaced-apart locations to an underlying fabric, an attachment for a sewing machine with a transversely oscillating needle or work table has a base on which a cross-slide assembly is mounted for supporting a retaining device movable in two mutually orthogonal directions under the control of a handle and a guide member displaceable along a part-circular track. The retaining device has a pointed stud engageable with the fabric and a gripper or clamping jaw adapted to hold the finding which, together with the fabric, is thus displaceable by the handle into any of three different positions relative to a stitching station aligned with the sewing machine.

Abstract: A pump assembly has a hopper adapted to hold a wet concrete mass and having a front wall formed with a front port centered on a front axis perpendicular to the front wall at the front port and a rear wall formed with two rear ports centered on respective rear axes perpendicular to the rear wall at the rear ports and generally parallel to the front axis. Respective piston pumps secured to the rear wall outside the hopper over the rear ports are operable to draw portions of the mass out of the hopper and expel them back into the hopper through the respective rear ports. An outlet conduit is connected to the front wall outside the hopper over the front port and a distributor pipe in the hopper has a front end fitted and aligned with the front port and a rear end engageable over and alignable with either of the rear ports. A buttress formation fixed on front end of the distributor pipe defines outside the hopper a buttress plane parallel to the front and rear planes.

Abstract: Mold elements, generally composed of clay, are removed from the mold by pressing the body upwardly with a wedging action.

Abstract: A recirculating-ball drive has a ball nut centered on an axis and formed with an internal helical groove and receiving a spindle centered on the axis also and rotatable in the nut about the axis. This spindle is formed with an external helical groove of substantially the same pitch as the groove of the nut and having two turns interrupted by a substantially planar flat spaced radially outwardly of the axis. Faces of wedges bolted to the flat define thereon a pair of parallel guide surfaces which in turn define with the flat a passage extending between the interrupted turns of the spindle groove at an angle opposite the pitch angle of the spindle groove. An annular row of like balls fills the passage and the turn of the spindle groove interrupted at both ends by the flat.

Abstract: A belt-tension gauge for measuring the tension of a belt spanning a pair of wheels, especially a V-belt in the engine compartment of a motor vehicle, comprises two pivotally interconnected housing parts which are biased by a spring spread apart and carry respective rollers which bear upon one side of the belt while a member at the pivot rests against the opposite side. The relative displacement of the two housing parts by the spring is displayed by indicia on one of the housing parts and indicates belt tension.

Abstract: A motor-vehicle door lock has a lock bolt defining an axis and normally secured to the doorpost. A locking fork normally secured to the door edge can engage this lock bolt to retain the door against the doorpost. The bolt is formed of a rigid axially extending metal core and at least one axially deformable synthetic-resin body on the core. The core has a plurality of annular ridges having outer surfaces and defining a plurality of outwardly open annular grooves and the body fills these grooves and projects radially therefrom beyond the outer surface of the ridges. The ridges and grooves may be separate and annular, or may be the turns of a helical screwthread formation.

Abstract: A booth forming a spraying chamber for workpieces to be coated with powder particles has a substantially fully open front side, giving access to an electrostatic spray gun, and a substantially fully open rear side adjoining a housing of a detachable powder-collecting unit which is open toward the chamber while being separated therefrom by an apertured screen. Tubular filter elements in the housing of the powder-collecting unit, having air-permeable peripheral surfaces, communicate with the suction end of a blower in an overlying clean-air unit, thereby giving rise to an air stream which passes generally horizontally through the chamber from its front side to its rear side and entrains particles discharged by the spray gun. Particles bypassing the workpiece to be coated may traverse the apertured screen and cling to the surfaces of the filter elements from which they may be intermittently dislodged by an air blast directed into these elements from the clean-air unit.

Abstract: A filter pack for the purification of air and gases comprises an undulating sheet of elastic fleece, e.g. one made from polyester fibers, sandwiched between two sets of similarly folded parallel retaining strips interspersed with the undulations of the sheet so that each strip forms a plurality of integrally interconnected U-shaped pleats with the legs of adjacent pleats closely juxtaposed. The strips, or at least outer surface layers thereof, consist of heat-fusible material enabling the closely juxtaposed legs of their pleats to be thermally bonded together after pleating. The strips may also be made from fleece so that bonding takes place only at contact points between their fibers, allowing the filtered fluid to pass both between and through the strips. Similar bonding may take place between the strips and the sheet.

Abstract: A package for cartridges for rapid reloading of bolt-type magazine or clip for a weapon especially for automatic and semiautomatic military weapons, comprises a generally U-shaped frame whose shanks form inwardly open channels receiving opposite ends of the cartridges or rounds. The mouth of the package is formed with a substantially funnel-shaped seat adapted to surmount the mouth of the magazine or clip so that the stack of cartridge can be pressed from its side opposite the mouth into the magazine, e.g. by the insertion of fingers through windows defined between the shanks. The seat is asymmetrical with respect to the median plane through the package with side of the seat being formed with openings opposite the aprons which define the funnel shape.

Abstract: A manual riveting tool for the setting of blind rivets comprises a flat head whose housing carries the chuck which engages the mandrel and at least one pivotable member which is coupled with the chuck by a transmission in the head to draw the mandrel through the rivet and tear away. According to the invention, this member is provided with a lever to which an actuating arm can be removably connected by a plug-and-socket arrangement and the member further, at one of its ends at a side of the housing can be engaged by a standard socket wrench via another plug-and-socket connection. The housing may be formed with part of still a further plug-and-socket connection, e.g. for engagement by a handle. The plug-and-socket connections can be standard socket-wrench elements.

Abstract: A rug and carpet cleaning apparatus of the type in which a housing is shifted along the floor and is connected to a suction chamber while having rotary brush, carpet-shampoo, massager, and like rotary units which are selectively to act upon the carpet depending upon the function or operation to be carried out. According to the invention, at least two such units are provided on opposite sides of the fulcrum or pivot of a rocker or teeter which is controlled, e.g. by a lever and cable arrangement, to selectively bring one or the other unit into action depending upon the tilt imparted to the rocker. Both units can be continuously coupled to the drive motor which can also be mounted on the rocker.

Abstract: A pickup 21 is connected with a portioning element that carries out individual portioning operations between two portioning pauses. By means of a sensor 22 and a counter 29 the actual values of the portioning operation steps are measured and are compared in a comparator 35 with a desired value from a desired-value setter 30. When the actual value reaches the desired value the programmed controller 27 for the next portioning operation and simultaneously the counter 29 is reset via the line 38. Thus the overrun of the portioning element after switching off is counted for the next portion. With each difference between desired value and actual value of a preceding portioning operation thus effectively the remaining desired value for the next portioning step is corrected.

Abstract: A multiport valve for a dust-collection system has a pair of axially spaced seats for two of the ports which can be selectively engaged by a valve member in the form of two oppositely convex shells adapted to bear against one another at their edges. In addition, the shells can be separated so that each engages one of the seats. The actuator for the valve member or plate comprises two telescoping members which can be collectively or individually shifted in the axial direction. These members may be connected by swivel joints to the valve plate.

Abstract: A subcaliber missile to be launched from a barrel, in order to serve as a carrier for satellite missiles of other ejectable bodies, has an envelope divided into two half-shells of tapering configuration which are articulated to the missile bottom and are held together by a missile head and by internal partitions separating the ejectable bodies from one another. When the missile is in flight, the ejection of the head by the detonation of a charge exerts a backward reaction force upon the envelope, causing its load to move forward therein whereby the partitions are disengaged from the two half-shells and allow them to flip apart. The half-shells are provided with slots for a recessed tail-wing assembly and with back fins which, like the missile bottom, conform to the caliber of the barrel.

Abstract: A cutting machine, especially for foodstuffs such as wurst, forms slices of the product which are picked up on a cylindrical drum which has retractable pins and which, upon take-up of the slices, deposits them upon a plate by swinging downwardly toward the latter. The pins are retracted by the downward swinging movement to release the slices.

Abstract: A process for adding water to a concrete mix wherein, after addition of an initial quantity of water to bring a particular concrete mix to or close to a so-called zero consistency, the set point consistency is reached by the one-shot addition of the balance of the water determined from stored empirical and interpolated data based upon measuring consistency and water addition values. The method has the advantage that the establishment of a zero value consistency by the addition of water to the dry mix or a mix of unknown moisture content permits the consistency measurement at this point to be easily carried out by indirect electrical techniques.

Abstract: A measuring plate with at least one strain gauge and upon which a wheel of a vehicle can rest to generate a signal which is used to indicate or register the wheel load or axle load of the road vehicle, is received in a frame and has edges which extend transversely of the direction of vehicle travel. According to the invention, these edges are bevelled or partly cut away so as to be overhung by complementarily shaped sides of the frame. These edges also are provided, along the bottom of the plate, with elastic bars or ribs which rest upon and support the center of the plate above a support plate or body disposed below the measuring plate. The plate can have these edges covered with an elastic material, especially a clear elastomer or the entire measuring plate can be sheathed in the elastomer.

Abstract: A synchro transmitter having a rotor driven by a compass communicates the heading information from that compass to a plurality of loads via respective synchro receivers whose rotors are energized with direct current or carry permanent magnets and whose stators are supplied with a triad of d-c signals from three modular units each having one input connected to an output lead of a respective stator winding of the transmitter and another input connected in parallel with a winding on the transmitter rotor to a source of alternating current. A demodulator in each unit compares the current of the respective output lead with the reference current from the a-c source and feeds the result to an integrating operational amplifier which emits the corresponding d-c signal.

Abstract: A cartridge load for a revolver comprises a plurality of angularly spaced cartridges distributed in a circle, each having a respective casing, powder charge and bullet, with the casings being interconnected at their peripheries by thin flexible ligatures which are formed unitarily, i.e. in one piece, with the material of the casing so that the cartridges collectively form a ring which is limitedly expandable to fit into the drum or cylinder bores of different makes of revolvers.