Abstract: Two magnetic heads are mounted respectively in front of two springs, and face each other across a gap in a frame into which a recording disk can be exerted. The springs are respectively flexed back by means of two spring biased pivot levers, so that the heads do not engage the disk. These levers have tongues in their front, which hold the springs down. A cone-ball actuator pivots the lever towards each other permitting, in turn, the springs to flex towards each other so that the heads engage the disk.

Abstract: The present invention is an improvement in a machine described in U.S. Pat. No. 4,046,106 for applying a daub of liquid resin to the threads of a bolt-like fastener. In the unimproved machine the daub was applied by moving the fasteners tangentially to a disc-like applicator wheel. The improvement includes a number of notches in the circumferential edge of the applicator wheel. The fasteners engage the notches with the result that the patch of resin applied extends around the threaded fastener farther in the circumferential direction.

Abstract: A three part cone member assembly is provided for positioning a flexible disk on a drive hub. The three parts are, a disk with annularly arranged apertures, a plastic trunketed cone established by oblique arms and feet which stick in the apertures thereby determining the cones geometry; the third part is a metallic member with resilient arms, positioned in the plastic cone whereby each metal spring arm urges a plastic arm against the outer surface of the respective aperture.

Abstract: A device for holding bait fish to permit cutting a strip from the side of the fish. The device comprises a holding block having opposed sides and opposed faces. A first depression is formed in a first face of the holding block to hold a fish with a side of the fish protruding. There is a clamping plate having opposed sides and opposed faces. A second depression is formed in a first face of the clamping plate. The first and second depressions correspond in shape to hold opposed sides of a bait fish. There is a pivotal joint between the holding block and the clamping plate. The device is simple but effective and represents a substantial economy in bait preparation.

Abstract: A flared tube sitting on a base is embedded in a concrete slab, and a casement on a shackle can be inserted into the tube to make up the coupling. The casement holds a plunger which can be locked into a position in which its head urges balls out of the casement for engagement with the flare tube. The plunger lock includes a fork locking the casement to the plunger at the other end. The plunger head has a conical tip so that upon retraction the balls can be retracted to release the coupling or to insert the casement to make up the coupling. The flared tube is clamped down onto the base which in turn is constructed for fastening to re-bar structure in the concrete.

Abstract: The cell is filled with an electrolyte but partitioned into two chambers, one of which contains a particular additive which will react with a component of a fluid, e.g. air; no such reaction occurs in the other chamber. The two electrodes are similarly configured and both permit contact between the fluid and the electrolyte so that any other electrochemical reactions occur to a similar degree on both electrodes.

Abstract: An antitorque system for use in a helicopter produces antitorque moments with efficiency comparable to that of the tail rotor it is designed to replace. The antitorque forces are generated mainly from the main rotor downwash by the circulation control effect. The downwash is deflected laterally as it passes around the tail boom by a sheet of air continuously discharged tangentially to the surface of the tail boom on one side of it at velocities in the range 30 to 120 meters per second from slots extending longitudinally along the tail boom and having a width in the range 4 to 20 millimeters. The discharged air is supplied by a relatively low-pressure-ratio fan within the fuselage which directs a stream of air rearwardly into the tail boom. The tail boom is provided at its rear end with a laterally disposed aperture through which some of the fan-supplied air is discharged to create a direct jet thrust. The flow through the aperture is throttled to vary the antitorque moment for trim and maneuvering.

Abstract: A manual radio selector switch, normally used in aircraft, is provided with a particular switch position which is connected to a cyclical stepping switch. When the manual radio selector switch is in this position, the choice of radio is effected by the cyclical stepping switch. The cyclical stepping switch is stepped under control of the pilot who changes from one radio to the next by actuating a stepping switch on his control stick, whereby, when the manual radio selector switch is in the particular switch position, the pilot can change radios without the necessity of removing his hand from the control stick. One of several indicator lamps on the instrument panel indicates which radio has been selected by the pilot. When the pilot is transmitting, the light corresponding to the radio being used will flash.

Abstract: When used for projecting or editing motion picture film the optical rectification apparatus produces a stationary image of a frame of a moving film and a succession of superimposed stationary images from successive frames of the moving film. The apparatus employs an optically transmissive hollow cylindrical prism having a cylindrical external surface and an internal surface consisting of a number of facets. Light from the moving film is passed outwardly through the wall of the rotating prism and through a stationary plano-concave cylindrical lens positioned with its concave surface adjacent the external surface of the prism, but spaced slightly from it. The prism is connected to the same shaft as the film sprocket wheel resulting in an isotransport system in which the prism rotates in synchronism with movement of the film to deviate the light through an angle sufficient at each instant to compensate for the angular deviation of the light caused by movement of the film.

Abstract: A cold rolled lag stud has one end fastened to a wall or other support structure, while carrying a stud head capture head on its other end. The capture head has been bent from a rectangular blank and has a base, an upright front wall, a rearwardly and downwardly slanting top, and an end portion extending parallel to the base. Weld-assisting protrusions on the base and the end portion hold the lag stud and are welded thereto. The top of the head and the front wall have a slot for insertion of the head and shank end of the stud to be captured.

Abstract: Disclosed is a method and apparatus for calibrating and recalibrating a photometric measurement instrument which supervises the presence of dust in a particular location as produced by a process during which dust is developed on an irregular basis. The method is characterized in that the calibration is initiated upon the detection of a condition in which dust concentration is expected to be low. In a steel-making process, such a condition occurs upon termination of the blowing phase of a converter. In the case of smoke in a flue, such a condition occurs when there is an absence of gas flow in the flue.

Abstract: The tundish is mounted on a frame which can be lifted in relation to a carriage. A holder for a casting pipe is either positioned on the frame to be lifted therewith or on the carriage to be controlled in synchronism with the frame lifting so that the pipe retains its position relative to the tundish.

Abstract: Strips cut by an edge trimmer are engaged by rollers pulling the strips through a pipe and permitting the strips to hang down and descent through a funnel towards a horizontally operating cutter comprised of an annular blade across which passes an excentrically rotating blade, to cut the strips into small pieces. The rotating portion of the cutter may include two blades, and the stationary part may have plural annular blades arranged around the axis of the rotation of the blades; different strips such as from different trimmers are fed to the annular blades, surrounded by separate funnels.

Abstract: Construction parts are protected against lightening by a layer which releases a cloud of ionized and ionizable particles to spread the area affected by the lightening flash and to fan out the current path. The layer may include additives which swell when heated to increase the volume and density of the cloud. An electrically and thermal conductive layer or two such layers each having predominantly one of these properties is provided underneath the releasing layer.

Abstract: The roller track for moving large pipes through a tempering furnace includes two pairs of relatively closely spaced, resiliently mounted rollers disposed in the end zone of the furnace, where any portion of the pipe passing through is hot and has minimum strength on account of the heating.

Abstract: A vending machine having an enclosure for articles to be vended, a lockable door to the enclosure and a coin operated locking mechanism to unlock the door when a predetermined combination of coins is placed in the coin operated mechanism. A coin mechanism enclosure includes releasable support which is engageable with the coin operated mechanism to hold the mechanism in a predetermined position to control the opening of the door. Structure is provided to release the coin mechanism from the support to remove the coin mechanism from the coin mechanism enclosure.A vending machine having an enclosure for articles to be vended, a lockable door to the enclosure and a coin operated locking mechanism to unlock the door when a predetermined combination of coins is received by the mechanism. A latch member is supported by the door with the latch member being engageable with a keeper within the coin mechanism when the door is locked.

Abstract: A plastic coating is provided on a heated wire in that powder is poured around the heated wire for adhesion thereto; the wire is then passed through a funnel shaped heating chamber, wherein the wire encounters chamber space narrowing radially progressively in direction of passing, for heating and melting the powder completely, the melted plastic is uniformly distributed thereby about the wire when leaving the chamber in special cases, foam can be deposited on the still warm and sticky coating.

Abstract: An auxiliary gas source for blowing a ballast tank of a submarine craft includes a casing with a store for pressure gas, a container for liquid and a gas generator proper into which the liquid can be forced by the gas. The liquid is contained in a flexible bag and the pressure gas acts on the bag from the outside, to be separately discharged as a supplemental supply of gas.

Abstract: Fourfold power branching for each propulsion mode (forward and reverse) requires recombining on a single output shaft which is carried out via two large gears mounted separately on axially spaced hollow shafts, one being traversed by the output shaft whose end is coupled centrally to the facing ends of the two hollow shafts by two gear couplings with crowned teeth.

Abstract: An MOS device with a floating gate and a conductively connected gate is operated in that pulses are applied to the latter gate to capacitively charge the floating gate, and the drain potential is compared in-between pulses with the analog signal. Pulse application is stopped when agreement has been reached.