Abstract: A drive shaft including a universal coupling is made in the form of a uniy bonded fiber material structure having anisotropic properties. A winding form or mold is assembled to include, for example, an elongated winding sleeve, a flange forming core element, and an elongated winding mandrel joined together. Impregnated fiber material is wound onto the mold so that the fibers of the winding lie at thread angles approximately .+-.45.degree. with respect to the longitudinal axis of the form or mold. The wound structure is compressed whereby the coupling assumes its intended shape after curing or hardening. Portions of the form or mold are removed, for example, by dissolving and washing in a suitable solvent. Alternatively the drive shaft coupling is formed directly on the torque transmitting shafts to be coupled so that the transmitting shafts are integrated into the unitary structure. The annular flange and 45.degree.

Abstract: Electromagnetic driving mechanism for oscillating displacement pumps (10) is described which comprises a linear motor (21, 22) and a control circuit (51, 52, 53, 54). The control circuit controls the stroke movement of the linear motor (21, 22) in response to the deviation of the actual value of a stroke parameter (stroke distance, stroke speed, stroke acceleration, and pressure of the medium being pumped) from the reference value of this stroke parameter. A preferred embodiment is assembled in such a manner that the pump (10) proper may be easily exchanged and constructed as a discardable unit. Such a pump unit (10) is particularly desirable in connection with blood pumps.

Abstract: A throttling device is located in a venting pipe or in a pipe section such as a flue gas pipe or conduit arranged between a boiler and a flue or chimney. The flap is held in a pipe section for removal out of the respective pipe either by tilting or by pulling the flap out. For this purpose the pipe section has a slot which is about semicircular and which, in operation, is covered by a ring section or sector. The throttle flap may be pulled out of the pipe section together with the ring section and with its adjustment drive whereby cleaning of the pipe or conduit is substantially facilitated. Heat losses through the flue are avoided when the throttle flap is closed.

Abstract: A piston rod is formed of fiber reinforced material so arranged that an elastic connecting zone is provided between the rod and the piston, thereby avoiding bolting one end of the piston rod to the piston. The cavity inside the piston has a dovetail recess. The fibers are anchored in the cavity and recess by embedding the fibers, which fan out in a uniform distribution from said elastic connecting zone, in a synthetic embedding material.

Abstract: An analog voltage representing the weight of an article being weighed is provided by a strain-gage type load cell. The analog voltage is converted into digital weight value data by means of an analog/digital converter. If the weight value data which are provided after the lapse of a predetermined time period following the turning on of a power supply, are within a predetermined range, the weight value data are stored in a memory as an offset value. The data stored in the memory are used for subtraction from further weight value data are displayed in digital manner by a display. If the weight value data provided after the lapse of a predetermined time period is off the predetermined range, a renewal setting of the offset value in the memory is prevented.

Abstract: A fluid control valve is equipped with a plurality of sleeves nested one within the other to form a cage for pressure reduction between the inlet and outlet ports of the valve housing. Each sleeve is provided with blind bores, through-bores and interconnecting grooves which cooperate to repeatedly divide the flow into more and more partial flows which keep colliding with one another. Volume control is achieved by a slidable piston cooperating with the cage.

Abstract: The present drafting apparatus comprises a drafting board (1) having secured to one longitudinal edge thereof a metal rail (4). A runner (3) and a rail (2) are displaceable along the metal rail (4). The runner (3) is pulled against the metal rail (4) by magnets. A carriage (6) supporting a ruler (5) having about a square shape, is displaced along the rail (2) and held in place by magnets (43) cooperating with the rail (2) at least the edges of which are made of ferromagnetic material. In order to adjust the rail (2) through relatively small horizontal or vertical angles, the rail (2) is tiltably secured to the runner (3) for adjustment through angles of about 10.degree. to 20.degree., preferably 15.degree. in either direction from the perpendicular position relative to the runner. The tilting movement is transmitted to the rail with the aid of a rod (19) spaced from the journal stud (12) and with the aid of a slide (21) which may be arrested relative to the rail (2).

Abstract: A magazine for fasteners with heads is made of two separate, profiled, extruded channel members of light metal or thermosetting material. The channel members are held together by a plurality of screws or releasable clips. The channel members are further spaced from each other by an exchangeable spacer rod, whereby the magazine may be adapted to fasteners of different sizes by replacing the spacer rod with another spacer rod having a different thickness and height or width. Gliding shoulders, for example of spring steel wire, for the fastener heads are arranged longitudinally on the inwardly facing side of each channel member.

Abstract: A high-strength component of complex geometric shape is formed by a core of hollow spheres of metallic particles surrounded by a shell of homogeneous metallic material. The hollow spheres are intimately bonded to each other and to the inner walls of the surrounding shell by hot isostatic pressing. The pressing procedure is enhanced by the use of elements such as boron which lower the melting point of the hollow spheres, for example, when said spheres are coated by said boron.

Abstract: A noise reducing resonator, herein referred to as a silator due to its no silencing quality, is made up of primary struts forming a main frame and secondary struts forming at least one subframe enclosed by a vacuum tight cover to enclose a vaulting evacuated volume. Each frame has a given span width and a vaulting height corresponding to 0.005 to 0.05 times the respective span width. The frames are arranged in a hierarchic order which means that a larger main frame holds a smaller subframe which in turn holds a still smaller subframe and so on. The resonance frequency increases with the number of subframes held in a main frame. Interconnected silators may cover entire surface areas for noise reduction or absorption.

Abstract: The noise of an exhaust gas flow of an internal combustion engine or other hermodynamic equipment is reduced by silators which are operatively arranged for deadening or absorbing the exhaust noise. Such silators have vaulted surfaces enclosing an evacuated volume which may include a cooling liquid. The silators have a resonance frequency that depends on the vaulting height and the free span or diameter of the vaulted surface. By properly dimensioning the silators and combining a plurality thereof each having a different resonance frequency, a wide frequency range of exhaust noises may be covered. Preferably the silator impedance is smaller than the air impedance of the environment. The silators are protected against the heat of the exhaust gases.

Abstract: Nails, screws and the like, referred to as fasteners, are automatically supplied into the magazine of a driver for the fasteners from a supply chute. A slide pusher may extend out of the free end of the magazine and cooperates with a gate at the discharge end of the supply chute, whereby the gate is opened when the free end of the magazine is inserted into the discharge end of the supply chute. In this position the magazine slide pusher is located in a recess to permit the fasteners to freely pass by the slide pusher into the magazine guide channel. When the magazine is full it is withdrawn from the supply chute, whereby a spring closes the gate and the slide pusher is moved back into the magazine guide channel to push the fasteners toward the magazine discharge end under the force of a spring in the magazine.

Abstract: A strain gage transducer, preferably of the above double bending spring or beam type, has secured to its spring or springs strain gage elements etched out of foil from which further conductor configurations have been simultaneously etched. These further conductor configurations are shunted by interruptable short circuits. Some of these configurations have such a shape that they are substantially nonsensitive to strain and hence located in a zone or zones of the spring or beam where the deformation due to strain is relatively small, for example in a central zone. Others of these configurations have a shape to exhibit large creeping. The latter shapes and the respective strain gage elements are secured to the spring or springs substantially in zones of large deformation. By interrupting the proper short circuits the negative creeping of the foil strain gage compensates the positive creeping of the respective spring.

Abstract: For the purpose of automatically vending cups of cold drinks, ice being directly put into a cup, source powder or a concentrated source liquid, and cold water are required for mixture. Ice is made by an ice making machine. Cold water is prepared by cooling city water with ice made by the ice making machine. To that end, a cylinder for stocking ice formed of apertures at a portion of the peripheral wall thereof for allowing a flow of the water therethrough and a cold water tank for storing cold water around the cylinder are provided. Ice made by the ice making machine is selectively supplied into a cup for vending or into the ice storing cylinder for the cold water. The cold water is held in the cold water tank and is withdrawn through the ice storing cylinder while the same is in contact with the ice stored therein. The cold water is mixed with the source powder or the concentrated source liquid and the mixture is guided to a cup together with the ice.

Abstract: According to the present method and apparatus work pieces such as railroad wheels are power clamped on a cone shaped inwardly facing side. In a first clamping step clamping areas are impressed into the side or surface of the work piece said clamping areas having a suitable inclination. In a second clamping step the actual power clamping is performed at these clamping areas. For this purpose a plurality of radially moving clamping jaws are arranged to carry at least one clamping tooth. Each clamping tooth in turn is adjustable in its position in an axial direction along its respective radially moveable clamping jaw.

Abstract: A coiling apparatus converts longitudinal fastener strips into wound up coils. For this purpose the strip is fed through a guide track substantially tangentially to one or the other coiling or winding mandrel which may be brought into coiling or winding position by a pivot lever which carries two mandrels, one at each end. A clamping lever holds the strip so that it runs onto the mandrel.

Abstract: A baby carriage having a pair of front legs and a pair of rear legs. The pair of rear legs each have an angle bar pivotally connected thereto while the angle bar has a pusher rod body pivotally connected to the other end thereof. With the baby carriage in the opened state, the angle bar is substantially in line with the associated pusher rod body. With the baby carriage in the closed state, the pusher bar body and the associated angle bar are in bent relation to each other, thus reducing the vertical dimension of the baby carriage. Further, in response to the turning movement of the angle bars relative to the rear legs, both the longitudinal and the transverse spacings between the front and rear legs are reduced. In this manner, the baby carriage is folded.

Abstract: A connector strip for conveyor belts includes a plurality of preshaped inidual connector elements (1) which are held together by a wire (2) secured to the inside of a leg of each connector element (1). The wire has a wave form shape whereby the bendability of the connector is maintained.

Abstract: The present driver for fasteners such as nails, screws and the like is provided with a separator member operatively located between the ejector channel and a fastener supply magazine. The separator member takes up a fastener arresting position in which the separator member reaches between the shafts of two fasteners and a retracted position in which the separator member releases a fastener for movement into the ejector channel. The separator member cooperates with a holding device which holds a fastener in the ejector channel after release by the separator member and prior to the driving stroke. The holding device may comprise two permanent magnets. The separator member has a tip which reaches into the ejector channel to different extents depending on the adjustment of an adjusting device for the separator member.

Abstract: The present endoscopic apparatus with a laser light conductor is used for irradiating bladder tumors in man with a laser light beam. For this purpose a jacketed light conducting fiber is arranged in parallel to an optical viewing device. A rigid bushing is secured to the output end of the light conducting fiber. The bushing includes a hinging member connected to a push rod or cable pull for remote manipulation of the output end of the light conduct ng fiber. Preferably, the light conducting fiber is axially shiftable in its jacket. For this purpose a shifting device, located at the input or operating end of the apparatus is operatively connected to the light conducting fiber.