Abstract: A precision drive for a rotary potentiometer measuring the lineal displacements of a reciprocating machine unit, for the generation of switching signals, the drive including a control disc which is coaxially coupled with the potentiometer and driven by means of a timing belt which is attached to the moving unit. The drive belt may form a closed loop around a return roller which is carried by a guard case, it may have opposite angled-off runs of which one is preloaded for tension, or it may have one extremity attached to the control disc, under a torque bias.

Abstract: Tie anchor for sandwich panels of reinforced concrete in the form of a metal strip of undulated zigzag shape whose loop portions are anchored in the concrete panel layers and whose connecting leg portions reach through the intermediate insulating layer. Two central leg portions of the tie anchor are oppositely inclined to form a rigid central connecting point between the panel layers, while all other leg portions are parallel, to allow for limited panel displacements, under unequal thermal expansion.

Abstract: An improved injection unit for a plastic materials injection molding machine, having a plastification cylinder and a cooperating rotatable and axially movable plastification screw, both supported and guided on tie rods by means of a carrier bridge, the plastification cylinder being axially adjustable and clampable in relation to the carrier bridge by means of a threaded adjustment nut cooperating with a threaded end portion of the plastification cylinder and a central threaded clamping sleeve cooperating with a stationary thrust plate, the latter being permanently secured to the carrier bridge.

Abstract: A filter cartridge for a liquid-straining filter assembly designed for a radial flow-through, the cartridge having a coiled filter body which surrounds a perforated central sleeve and is axially confined between end discs, the coiled filter body consisting of overlying layers of two axially offset strips of creped filter paper, the protruding spiral edges of the two coiled strips being glued to the end discs, while the recessed opposite edges form bypass flow gaps interconnecting the axial channel portions between the creped paper layers to form a zigzag-shaped transverse flow channel for depth-filtering action, when the entry layers of the cartridge become clogged.

Abstract: A mounting structure for the granulate hopper of the injection unit of an injection molding machine which is convertible for use with a selectively horizontally or vertically oriented injection unit, the structure comprising two joined, rotatable tubular connectors each with an oblique end face, the lower connector being seated on an inclined face of the mounting hub which holds the plastification cylinder, and the upper connector carrying the hopper. The latter consists of a conical lower hopper portion and a cylindrical upper hopper portion which is inclined against the former so as to have one common straight side line which is vertical in both configurations. Conversion adjustment is accomplished through rotation of the lower connector and of the hopper by 180.degree..

Abstract: A device for electronically controlling the intake air temperature of an internal combustion engine, featuring a temperature sensor in the clean air space of the filter, the signal from the sensor controlling an electromagnetically driven oscillator pump whose vacuum output adjusts the flapper of an air flow proportioning valve by means of a pneumatic actuator, until the correct ratio of cold and preheated raw air is admitted into the intake system for the establishment of an optimal combustion air temperature. An automatic lowering of this temperature under full-load operation is achieved by utilizing the negative pressure in the air intake manifold as a control means to shift the oscillating armature of the oscillator pump away from its maximum output position. In an air intake system for fuel-injected engines, a similar result is achieved by means of an air flow sensor whose output signal is superimposed on the control signal from the temperature sensor.

Abstract: A detachable insulating cover assembly for greenhouses and similar structures using plastic cover sheets for the creation of a stationary air layer, the sheets being held in place by manually clampable and releasable fastener assemblies, each consisting of a fastener base with a stem and a fastener cap, the fastener bases being detachably clampable to the base flange of T-bars which form the skeleton of the greenhouse, using transversely movable attachment members with retaining noses that reach behind the edges of the T-bar base flange in the clamped position. Several variants of attachment members are disclosed.

Abstract: An injection unit adapted for mounting on the die closing unit of an injection molding machine in a number of different orientations, for injection in the die separation plane or perpendicularly thereto, whereby the tie rods of the injection unit are oriented horizontally or vertically within a vertical plane and the granulate supply hopper is mounted on a horizontally extending connecting cylinder with a mechanical conveying device which feeds the granulate from the hopper into the plastification cylinder of the injection unit, the connecting cylinder being angularly adjustable to obtain a vertical hopper axis for all injection unit orientations.

Abstract: A linkage connection for connecting a wax thermostat and membrane actuator drive assembly to a flapper-type flow proportioning valve in the air intake system of a carburetor-equipped internal combustion engine, the connection comprising a connecting cylinder formation in the flapper wall with a transverse slot and a groove in an extension of the thermostat housing with two positioning flanks which cooperate with the connecting cylinder.

Abstract: A dual-function deflation valve for hand-held blood pressure measuring devices with a finger-depressible valve actuating lever which has a detent mechanism capable of retaining the lever in the fully open valve position, for a quick release of residual air pressure from the measuring cuff. The detent mechanism has two detent members with cooperating cam formations defined by the valve housing and valve actuating lever, respectively, either on coextending wall portions of both, or on a wall portion of the actuating lever and on a spring member which is mounted in a recess of the housing.

Abstract: A cardboard folding liner for shirts, blouses, pajamas, and similar garments which are foldable into a flat compact package for shipment and display, the liner having a pair of inwardly foldable wing panels adjoining each longitudinal side of a rectangular center panel and delineated by two pairs of weakened fold lines. In the folded state, the wing panels clamp portions of the garment between them and the center panel, the folded state being maintained by a closure which consists of a closure flap in the form of an integral laterally protruding extension of one of the two inner wing panels which cooperates with a closure notch in the top edge of the other inner wing panel.

Abstract: A pressure gauge for sphygmomanometers, having a pressure capsule with a diaphragm wall, a pointer on a rotatable spring-biased pointer shaft, and a drive mechanism connecting the diaphragm wall to the pointer shaft by picking up and magnifying the displacements of the diaphragm wall, the drive mechanism including a sensing member on a rotatable sensing shaft, in contact with the diaphragm wall, and a magnifying gear drive consisting of a drive arm on the sensing shaft with gear teeth forming a gear segment of large radius, in driving engagement with a pinion on the pointer shaft. The drive arm may be bendable to adjust the gear drive ratio.

Abstract: A device for producing finned heat transfer tubing of oval cross section by winding one or more continuous metal strips around the tubing in the form of spiral fins, the contact edge of the metal strip being shaped prior to winding to present a hook-shaped ledge with an acute enclosed angle, and the neutral axis for on-edge bending being shifted to the vicinity of the contact edge by applying to the strip a tensile stress and to its upper half additional transverse compression stress, using a stretch roller and a cooperating winding guide. A lathe-like machine semi-automatically winds two metal strips onto successive lengths of oval tubing, using a carriage with two pivotable winding arms and two strip reels.

Abstract: A device for lubricating the tie rods in the die closing unit of an injection molding machine, consisting of a tubular shell which forms an annular chamber around the tie rod and a lubricant absorbing fleece body occupying said chamber, the shell being constituted by two identical half shells which are joined along longitudinal edges provided with matching flexible tongue-and-groove formations, for the forcible radial snap assembly between shell-straddling wall portions of the guided part of the die closing unit.

Abstract: A device for adjusting the intake air temperature of a carburetor-equipped internal combustion engine whose air intake system has a flapper valve in a duct junction admitting cold raw air and/or preheated raw air to the intake filter, depending on the raw air temperature, the flapper valve position being controlled by a pneumatic membrane actuator which receives negative pressure from the intake manifold, via a vacuum line with a thermostat-controlled relief valve responsive to the temperature of the air mixture. In the drive connection between the membrane actuator and the flapper is arranged a wax thermostat which increases or decreases the effective length of the connection in response to the ambient air temperature, thereby adding the thermostat displacements to the actuator displacements, the effective length of the drive connection being further adjustable by means of a threaded connection which is arranged between the membrane support body of the actuator and the wax thermostat.

Abstract: A device for the destruction of microfilm and similar data carriers with microimage impressions which is designed to shred the data carriers by means of a rotating shredding cutter in the form of a plain milling cutter whose teeth move past a transversely extending stationary cutting edge. A strip feeding unit advances the data carrier strip past this cutting edge along a guide plate, said unit including a driven endless conveying member which forms a conveying gap with the guide plate. A second stationary cutting edge forms a second cutting point behind the first cutting point. The strip feeding unit is self-contained and movable against a spring bias in relation to the main frame and its guide plate, so that a safety switch, responding to such movement, stops the device when too many data carriers are fed into the device simultaneously.

Abstract: An arrangement in connection with the die closing unit of an injection molding machine for interchangeably mounting to the rear side of the stationary die carrier plate differently spaced pairs of tie rods of injection units of different size, using two tie rod mounting sockets whch are clampable to the die carrier plate and thereby also serve to produce an axial preload on the tie rod connections of the die closing unit in the die carrier plate.

Abstract: Air intake filter for combustion engines and other air-aspirating machinery operating under dusty conditions, the filter assembly having a cyclone separator stage and a dust collecting pan which is separated from the filter cartridge and cyclone chamber by a partition wall. The partition wall has a dust discharge opening with a fin-like guide baffle extending inwardly from the partition wall, the guide baffle having a circumferential wall portion and an arcuate radially inwardly pointing wall portion, thereby deflecting the dust particles away from the dust discharge opening.

Abstract: A quickly releasable clamping lock of the knee lever type, usable to clamp a filter cover to the filter housing of an engine air intake filter, the lock assembly comprising a curved hook member whose one extremity engages the filter cover and whose other extremity is pivotably attached to a knee lever, the latter in turn, being pivotable about a pivot anchor which, like the hook member and the knee lever, is a U-shaped wire part with angled-off anchoring trunnions engaging transverse apertures in the wall of the filter housing. The pivot connection between the pivot anchor and the knee lever is formed by wire loops in the leg portions of the pivot anchor and by angled-off pivot trunnions on the wire extremities of the knee lever. Alternatively, the pivot anchor may be a U-shaped stamping with angled-off lugs in the place of the anchoring trunnions and bores in the place of the wire loops.

Abstract: A separator device for removing the oil from an oil-carrying air stream, the device comprising two concentrically spaced oil separator elements which are mounted inside a cylindrical housing in such a way that the air stream is forced successively through a coarse filter body and a fine filter body, where the oil droplets are trapped and collected, accumulating inside the spaced bottom covers of the two separator elements. Separate oil suction pipes serve to remove the accumulated oil from the device.