Abstract: A caster assembly adapted for incorporation in the frame of a suitcase, the caster assembly comprising a caster housing with a housing recess enclosing a major portion of the swivelable caster wheel, housing side walls limiting its swivel range, and a swivel bearing with a stationary journal plate attachable to the bottom wall of the caster housing by means of a slot-engaging protrusion and rivets. The caster housing may be an integral part of the suitcase frame.

Abstract: A quick-release bayonet-type attachment between a core body and a plank of a concrete casting formwork, the core body being of oblong arcuate outline and holding in a central groove the eye portion of an anchor member, the bayonet-type attachment including a bayonet lock plate embedded in the core body and a cooperating threaded rod with a bayonet lock head. The lock plate and the cooperating head have non-circular cross sections, the lock plate being accessible through an upper bore portion of matching cross section, the bore portion below the lock plate having flexible walls and a rotationally offset non-circular cross section.

Abstract: A core body assembly for the creation of an oblong arcuate recess in a prefabricated concrete member and for the positioning of an anchor element in the recess, the core body assembly comprising two rigid inner core body parts which are enclosed within a flexible core body jacket, forming a bending connecting bridge and an adjoining anchor retaining groove with centering protrusions in its anchor positioning flanks. The inner core body parts have attachment inserts to which the end of a threaded rod can be attached, and they tilt against each other to clamp the anchor element, when the core body assembly is clamped against the formwork.

Abstract: A drive-reversing safety mechanism using a pivotable contact ledge on the leading edge of a mechanically openable and closable safety gate of an injection molding machine, the pivot axis being arranged at a flange corner of the safety gate, where the channel-shaped contact ledge engages the outside of the corner with a fillet of a ledge fold. An adjacent positioning flange of the contact ledge is yieldingly clamped to the safety gate by means of pins and compression springs. An actuator plate attached to the contact ledge cooperates with a switch controlling the safety gate drive.

Abstract: A safety cover assembly for the die closing unit of an injection molding machine having three jointly or separately openable safety gates on the front, top and rear of the unit supported in a cantilever-type guide arrangement on a U-shaped supporting frame, and a stationary cover assembly attached to the same frame and forming pockets into which the safety gates are retracted when opened. The supporting frame consists of three identical frame members, each carrying a safety gate and a gate drive in the form of a timing belt loop, as well as safety interlock switches and a safety interlock linkage for the operation of hydraulic and/or mechanical interlock devices. One frame member also carries a die displacement measuring unit.

Abstract: A valve adjustment unit for an electronically controlled hydraulic proportional-response valve comprising a proportional-response magnet unit, a coaxially connected electronic control unit, and an intermediate insulating spacer body surrounding the inductive coil of a displacement transducer. The magnet core of the transducer is carried by the push rod of the armature of the proportional-response magnet and arranged to move in the bore of an axial cover extension of the magnet unit housing which is open to the oil-filled armature displacement space. The transducer coil core is part of the electronic control unit, serving as a support for two circuit boards and as a cover for the control unit housing.

Abstract: A hydraulic actuator assembly for a push-type die closing unit of an injection molding machine capable of producing rapid die opening and closing movements with a small volume of pressurized fluid and an elevated die closing pressure in the closed die position, the assembly comprising a central power cylinder with a selectively bypassable power piston and two parallel, diametrally oppositely arranged single-acting travel cylinders. The low-pressure space on the forward side of the power piston is open to the pressure spaces of the two travel cylinders, and the total effective area of these pressure spaces is larger, by a relatively small amount, than the area of the high-pressure space to the rear of the power piston, said small amount determining the fluid volume necessary for the opening travel. A stationary plunger cooperates with a central bore in the rear portion of the power piston rod to produce a small pressure space for the closing travel.

Abstract: A swivelling fan-jet sprinkler which is convertible from a coarse sprinkling mode in which it covers a relatively large irrigation area to a gentler spraying mode in which it covers a smaller area, the conversion being achieved by means of a removable spinner cage which surrounds the nozzle cylinder of the sprinkler. The spinner cage has a captive snap ring cooperating with a groove in the nozzle cylinder to produce a detent action for attachment and removal of the spinner cage. The latter is driven by the water jets which are disturbed in the process.

Abstract: An apparatus for the production of marbled articles by injecting into the injection molding die of an injection molding machine two confluent streams of plastic raw material of different hue or color which are supplied from two injection units, via separate pulsation channels which open into a common nozzle channel, just ahead of the mold cavity. The plastic raw materials flowing in the two pulsation channels are subjected to an intermittant and alternatingly pulsating advance by means of feed thrust pulsation controls which generate an intermittant advance of the plastification screws of the injection units. At the junction between the two pulsation channels may be arranged a pulsation chamber with oppositely oriented material entry ports which are alternatingly closed by a reciprocating pulsating element which moves with the pulsating plastic streams.

Abstract: A mechanical interlock mechanism for the safety cover of the die closing unit of an injection molding machine which has an arresting rod attached to the movable die carrier frame and extending rearwardly through a stationary cylinder head plate, where an arresting unit encloses a pair of arresting jaws with attached cam followers. The latter are engaged by a control rod which is connected to the safety cover by means of a control linkage. The jaws are forcibly closed, in opposition to jaw opening springs, and butting of the arresting jaw ridges against the arresting rod collars is limited to one jaw only, as a result of an axial offset between the arresting jaw ridges, in connection with a certain minimal pitch of the arresting rod collars and a floating arrangement of the jaw closing assembly. The latter is spring-biased towards one side.

Abstract: A suction-limiting check valve for a crankcase ventilating line which is connected to the engine intake downstream of the carburetor, the valve having two valve devices arranged for parallel operation, each including a spring-biased diaphragm which closes against a valve mouth at a predetermined level of negative pressure, one valve mouth being much smaller than the other to produce an earlier reopening of that valve device under elevated suction on the outlet side of the valve.

Abstract: A rotating mixer with a double-cone mixing vessel carried by a horizontal mixer spindle, the mixing vessel consisting of two identical half-vessels which are releasably clamped to a central spindle ring. The opening of the spindle is closable by means of a pivotable shutoff clappet, when the charged half-vessels are attached or released using a dolly and lifting jack. Separate pairs of half-vessels can be used for mixing charges of different composition.

Abstract: A device for controlling a heated panel press in the switchover from a contact pressure mode to a curing pressure mode, in connection with the assembly of multilayer stacks of printed circuit boards with interposed thermosetting resinous bonding layers, the device consisting essentially of a displacement transducer measuring the decrease in the stack height in terms of displacement pulses and a pulse counter and count comparator producing a switchover signal at a predetermined threshold count which reflects attainment of the flux point in the bonding layer resin. After an adjustable delay, the switchover signal is transmitted to the control unit of the press.

Abstract: A self-closing tap valve with a tiltable outlet member which is supported in a valve housing by means of a ball-and-socket-type support and which, when forcibly tilted, lifts a pressure-biased valve plate off an upstream-facing valve seat in the housing. The valve plate incorporates a radially or axially protruding gasket, clamped or vulcanized in place, or the valve seat is part of a resilient seat ring insert. Resilient sealing and shock-dampening members cooperate with the tiltable outlet member.

Abstract: A device for the destruction of microfilm and similar data carriers by shredding, the shredding cutter having a cutting edge configuration of zigzag outline with alternatingly missing teeth, offset between successive cutting edges, the data carrier feeding unit including side-by-side O-ring belts on guide rolls with forwardly biased guide pins therebetween and/or side-by-side feeding wheels on a driven shaft and separately supported forwardly biased data carrier guide tongues, for positive guidance of the data carrier material to the cutting station.

Abstract: A mechanical interlock mechanism for the safety cover of the die closing unit of an injection molding machine which has two arresting rods attached to the movable die carrier frame and extending rearwardly through a stationary cylinder head plate, where pairs of toothed arresting jaws are movable into and out of engagement with toothed surfaces of the arresting rods to block their advance, in response to an opening movement of the safety cover which, through two attached control rods, moves the arresting jaws by means of cam surfaces and cooperating cam followers and drive links.

Abstract: A hydraulic actuator assembly for use in the die closing unit of an injection molding machine, the actuator assembly having a large power cylinder and a smaller travel cylinder with a large power piston and a small travel piston on a common piston rod, and bypass channels in the power piston which are openable and closable by means of an annular valve plunger moving on a guide sleeve on the piston rod. The valve plunger and the guide sleeve have three stepped cooperating sliding diameters forming bypass opening and closing plunger pressure spaces. Hydraulic pressure is supplied to the two pressure spaces through bores in the piston rod.

Abstract: An adjustable weight-supporting guidance arrangement for the movable die carrier member of an injection molding machine, consisting of two laterally spaced guide rails on the machine base with horizontal and vertical guide tracks engaged by matching guide faces of two slide shoes which are adjustably clamped to inclined strut extensions on the bottom corners of the movable die carrier member. The positions of the slide shoes are determined by means of threaded adjustment members, in response to readings obtained by means of a concentricity gauge.

Abstract: Hydraulic controls for the injection unit of an injection molding machine of the type which has tandem supporting bridges riding on two guide rods and hydraulic cylinder assemblies surrounding the rods, the cylinder assemblies in the rear supporting bridge which control the movements of the plastification screw being convertible from single-acting cylinders to double-acting cylinders with a differential piston, for the selective connection to a first hydraulic control system which has presettable proportional-response control valves for the adjustment of the pressure and flow rate of the hydraulic fluid, or to a second hydraulic control system which provides a continuous electronic control input to a servo-valve, adjusted by an electronic feedback loop with pressure transducers. The conversion involves the exchange of a piston and a cylinder cover in the two cylinder assemblies of the rear supporting bridge.

Abstract: A flapper-type combustion air mixing valve at the junction between a cold air intake duct and a warm air intake duct, the flapper being pivotally adjustable by means of an electropneumatic actuator which has a spring-loaded diaphragm separating an enclosed air-filled pressure chamber from an open drive chamber accommodating the spring and the flapper drive linkage. A heater coil in the pressure chamber receives variable power from a signal transformer, in response to a combustion air temperature sensor and a flapper position sensor. A load-responsive vacuum switch connected to the engine intake manifold switches the signal transformer between adjustments for a higher nominal control temperature for partial-load operation and a lower nominal control temperature for full-load operation.