Abstract: A core chuck designed to lock the core of a roll of material winding and unwinding operations to a mandrel, which core chuck comprises a core and a tubiform cylindrical chuck body dimensioned to accommodate the core. Means are provided for fastening the chuck body onto the mandrel shaft. The chuck body defines on the surface opposite the core at least one recess disposed parallel to the rotating axis thereof which recess has a releasably terraced bottom step plate including at least one step ascending from a common center groove to each side of the recess. The top faces of the step and of the common center groove are substantially parallel to and spaced apart at different distances from the opposite smooth face of the core. At least one toothed roller is disposed in the recess with its axis parallel to the axis of the chuck body.

Abstract: A pendant, earring, jewelry piece or the like which comprises an outside cage-like casing which is equipped with a plurality of openings provided on the peripheral faces thereof and an inside body disposed inside of the outside casing and of a dimension larger than said openings in the outside casing. The outside casing has a configuration of a cube or a cube-like member and the inside body is freely movable in the outside casing and has the configuration of a ball, a cube or any other convenient shape. The inside body may also be hollow and may receive another still smaller inside body freely movable therein.

Abstract: A door lock, requiring no penetration of a door leaf for unlocking from the outside, comprises a keeper secured to the inner surface of the door leaf, a housing slidably articulated to the keeper by two pivot studs, and a detent on an adjoining door post engageable by a pair of spring-loaded levers in the housing whose fulcra are a pair of pins normally immobilized by a retaining disk. With the door closed and the detent engaged, the housing fits around the keeper and can move away from it to a limited extent, allowing the door to be opened slightly, unless a handle on the housing is turned into a latching position engaging a bolt fixed to the keeper. Unlatching of the door from within, by reverse rotation of the handle, also disengages the levers from the detent so that the door can be opened wide. When the door is opened from the outside, its leaf is held ajar by the housing whose handle cannot be rotated in this position since the levers are blocked by the pivot studs.

Abstract: An apparatus for the sterile filling of products into cup-shaped containers, which comprises an endless conveyor passing containers in sterile condition in succession through treatment stations including a filling station, a lid-applying station, a sealing station and an ejection station. A large sterile chamber formed beneath an applied covering hood and enclosing all said treatment stations is provided; and before the treatment stations, as seen in the direction of travel of said conveyor, and in above the conveyor there are of a finished-container magazine and a short-path, quick-acting sterilization station including a sterilizing-agent sprayer and sterilizing-agent drier is above the conveyor and enclosed by the covering hood.

Abstract: A cine camera for taking talking pictures, in which a film is moved intermittently past an image gate by a reciprocating traction claw and continuously past a recording head by a rotating capstan coacting with a pinch roller, includes a latch by which the pinch roller can be held spaced from the capstan in an inactive position. The latching of the pinch roller in this inactive position, against the force of a biasing spring providing the necessary contact pressure during filming, is accomplished upon deactivation of the film drive by the residual kinetic energy of an inertial mass such as a flywheel which is coupled with either the capstan drive or the claw drive. The latch is released upon actuation of a trigger, either directly or through the intermediary of the claw drive. The biasing spring may be part of a toggle mechanism tripped by a presetting member, such as a sensor detecting the presence of a sound-film cassette in the camera.

Abstract: Disclosed is a method and apparatus for knitting patterns with a circular knitting machine provided with an annular array of knitting needles and groups of needle actuators. Pattern signals in binary notation are read out of a memory device and written into first one and then the other of a pair of counter stages. While pattern signals for a given course of knitting are being read out from one counter stage and forwarded to the corresponding actuators, pattern signals for the next course of knitting are written into the other counter stage from the memory device. The pattern signals alternately read out from first one and then the other counter stage are forwarded to the corresponding actuators by means of selection circuits to thereby produce a knit fabric having a continuous colored pattern.

Abstract: A prismatic waveguide of square or rectangular cross-section has at least one pair of opposite inner wall surfaces formed with inwardly projecting parallel cheeks extending along a treatment zone for elongate polymeric workpieces, the width of the cheeks being less than the spacing of the other pair of inner wall surfaces from each other. The waveguide is split along a median parting plane, bisecting this pair of cheeks, to facilitate separation of its two halves by relative tilting about a pivotal axis, the two halves adjoining each other along quarter-wavelength flanges parallel to that plane preventing the outward leakage of microwave energy.

Abstract: A ski brake preventing free flight of the ski upon its inadvertent release from the ski boot comprises a U-shaped stirrup whose shanks straddle the longitudinal edges of the ski and are provided with braking elements and a pair of torsion rods connected to the shanks and received in a mounting retaining the surface of the stirrup on the ski. When the bight of the U-shaped member is held against the ski by the ski boot directly or a plate of the ski binding, the brake elements are swung upwardly to the upper surface of the ski and lie parallel to the longitudinal edges. When the stirrup is released the resilient action of the torsion rods rotates the stirrup into a position in which the brake elements project symmetrically transverse to the longitudinal edges and below the bottom surface of the ski to prevent free flight.

Abstract: A group of cylindrical printing screens, rotatable about parallel axes, are journaled on a machine frame and carry coaxial gears in mesh with driving pinions on the frame. A bed, designed to support a substrate to be imprinted, is supported underneath each screen on the frame through the intermediary of elevation-adjusting wedges interlinked by a control rod. The sceens can be axially tensioned by mounting units, slidable on axially extending guide rods, which carry spring-loaded thrust bearings acting in an axially outward direction upon their coaxial gears.

Abstract: A doctor blade device particularly for screen printing machines preferably for textile printing on webs of material, which comprises a metallic stroke lip leaf for the coating of flowable color materials on flat webs of material, and means for providing different supporting conditions over a freely projecting length of the stroke lip leaf.

Abstract: A blind riveting tool has a base or holding member on which is pivoted a U-shaped clamping element which has a bight portion defining one side of a seat. Pivoted on this clamping element is a holding member formed with a jaw that can coact with the seat to grip the mandrel of a rivet whose head rests against the bottom side of the holding member. Both the displaceable member and the holding member have handles which when pivoted toward one another cause the jaw of the displaceable member to clamp a mandrel tightly against the seat and then pivot up, pulling this mandrel through its rivet and upsetting same.

Abstract: A blind riveter has a pistol-shaped housing connected via hydraulic and pneumatic lines and a rivet-feed duct to an actuator and rivet-feed arrangement. The housing has a tip forming a mandrel-receiving aperture and formed of a plurality of inwardly biased but outwardly deflectable holding elements. A chuck is displaceable in this housing between a front position engageable around the mandrel extending back through the aperture from a blind rivet whose head rests against the tip and a back position spaced well back from this aperture. During displacement from the front to the back position the mandrel is pulled back to upset its rivet and is broken off and during displacement from the back to the front position, the chuck grips the mandrel of a blind rivet that was introduced from behind into the housing behind the aperture and pushes it through the aperture, deflecting the holding elements apart.

Abstract: A multi-face clamp for wood working which comprises a clamping unit including a plurality of corner pieces. Each of the corner pieces defines at least two pressure faces which are adapted to engage complementary faces of a work piece. Two threaded bolts extend from and are operatively connected with the corner pieces. One of the threaded bolts has threads formed in an opposite direction from those of the other of the threaded bolts. A turn-buckle is disposed between each pair of adjacent corner pieces and receives in its inner threads the respective free end portions of the threaded bolts, so that upon turning of the turn-buckle the pressure faces of the corner piece exert pressure upon the complementary faces of the work piece.

Abstract: A fuze for an artillery shell to be spun about an axis generally parallel to the direction in which it is fired comprises a housing formed with a central axially extending sleeve and with a chamber surrounding the sleeve. A pin is axially slidable in the sleeve and is retained in position by at least one ball. A spiral spring wound in the chamber around the sleeve normally holds the balls in position to lock the sleeve in place and maintain the fuze in an unarmed condition. This spring comprises a steel inner section lying against the sleeve and normally pressing the balls together against the pin, an outer section having a high coefficient of friction and engageable with the inner surface of the spring-containing chamber, and an intermediate section between the inner and outer sections and having substantially more turns than both of these sections.

Abstract: A camera of variable focal length is equipped with an indicator which signals the existence of a condition unsuitable for the taking of pictures because of the risk of blurring. The indicator is controlled by a sensing circuit taking into account such parameters as focal length, exposure time and, possibly, the steadiness of the camera support.

Abstract: An artillery shell is provided in its nose in front of its bursting charge and its detonator with an impact fuze consisting of a pressure-distributing plate engageable with the inside face of the nose, a piezoelectric crystal resting against the back face of this plate, and an anvil resting against the back of the crystal. A pin is seated in the anvil and extends transverse to the direction of travel of the projectile and a spring-steel wire has a front end looped around this pin and a rear end passing back through the bursting charge and connected to the shell detonator. When the crystal is compressed either by deformation of the nose of the shell or inertial pressure of the anvil against the back of the crystal, it generates electrical energy that is passed back through the spring-steel wire to the detonator to activate same.

Abstract: A process for the production of peracetic acid which comprises the steps of adding, to an inner solvent, acetaldehyde and at least one catalyst selected from the group consisting of strongly acidic carboxylic acids, strongly acidic phenols and nitric acid, and introducing oxygen gas or oxygencontaining gas into the resulting mixture while stirring the mixture and maintaining it at a temperature range of -5.degree. C to 50.degree. C.

Abstract: Three separate pairs of electrodes are attached to a body part to be treated, spaced apart around said part of the body. A primary alternating electrical current having a primary frequency of between 100 Hz and 100,000 Hz is passed between one of the electrode pairs. A similar second alternating electrical current having a secondary frequency in the same range as the primary frequency but differing by between 50 Hz and 100 Hz from the primary frequency is passed between another of the pairs of electrodes. A tertiary alternating current is passed between the third pair of electrodes and has a tertiary frequency differing by at most 1 Hz from the frequency of either the primary current, the secondary current, or the arithmetic means of the frequency of these two currents.

Abstract: An apertured rectangular foil of substantially inextensible sheet metal, e.g. nickel or steel, has a hole at each corner engaged by a resiliently biased gripper exerting on it a diagonally outward force to hold the foil stretched in a surrounding tenter frame supporting these grippers. The frame is provided with marginal ledges, underlying the foil at least along the major sides of the rectangle, onto which the foil edges are releasably pressed by toggle clamps.

Abstract: A main lens unit having a fixed focal length and consisting of a positive lens member is preceded by an afocal forward lens unit having a variable magnification and consisting of a positive forward lens member, a negative intermediate lens member which is axially movable to change the magnification, and a positive rear lens member. The intermediate lens member is arranged to direct divergent bundles of rays to said rear lens member. The rear lens member is arranged to convert said divergent bundles or rays into bundles of rays which are substantially parallel to the optical axis of the lens and to direct them to said main lens unit. The forward lens member is axially movable to control the position of the image plane. The lens is designed to meet the conditionf.sub.min -f.sub.11 < 6ywhere f.sub.min is the smallest focal length of the lens, f.sub.11 the focal length of the intermediate lens member, and 2y the image field diagonal.