Abstract: An apparatus for installing table skirts to the perimeter of a banquet table having a fastener with an adhesive pile material substantially similar to an adhesive pile material on a top underside of the table skirt. The table skirt is wound in an upward direction on a hanging device having strips of adhesive pile material substantially similar to both the adhesive pile material of the fastener and of the table skirt. Once the table skirt is hung on the hanging device, the device is placed on a swivel hook attached to a rod mounted on a moveable rack in a manner so that the hook turns as the table skirt is unwound from the hanging device and the adhesive pile material of the table skirt and fasteners are pressed together as an installer moves around the perimeter of the table. To disassemble the table skirt from the table, the procedure is reversed by choosing a free end of the table skirt and pulling it apart from the adhesive material of the fastener and attaching it to the hanging device.

Abstract: A multi-stepped gameboard apparatus which is preferably made in a checkerboard design and divided into separate sections constructed in monotonic steps. The sections may be arranged in a variety of configurations to form a "mountain", "valley", or mixed mountain-valley configuration. Furthermore, the stepped gameboard sections are nestable to form an assemblage for carrying and storing the gameboard when not in use. Preferably, magnets or any other acceptable means known in the art are used to hold the sections together in the variable configurations. Storage areas for playing pieces are provided in each section.

Abstract: The device consists of a chin rest which simulates the chin rest portion of a violin and rests on the shoulder of the violin player and underneath the chin. The hollow tube with markings extends from the chin rest portion of the device. A second tube telescopes into and out of the first tube and includes a marker that slides along a groove that is in juxtaposition to the markings on the first or hollow tube.

Abstract: An apparatus for a-c welding with a consumable electrode has a welding transformer having a secondary winding connected to an electrode gap and two pulse generators. Each pulse generator has a power circuit connected in parallel with the electrode gap and consisting of a series circuit including a thyristor switch, a power supply winding and a switched capacitor, and a unit for controlling the thyristor switch. Each control unit has a zero detector and a control pulse former, the zero detector of the control unit of the first pulse generator being connected in parallel with the electrode gap, and the zero detector of the control unit of the second pulse generator being connected in parallel with the switched capacitor of the first pulse generator.

Abstract: A method for geophysical prospecting of complex orebodies, wherein elastic waves are excited at least two times in the rock mass containing orebodies and the radio-frequency electromagnetic pulses produced by said orebodies are recorded during each excitation to pinpoint the arrival time of the first and last pulses in each pulse train (1,2,3,4,5,6), then the difference is found between the maximum arrival time of the last pulse and the minimum arrival time of the first pulse in the pulse trains (1,3,5 and 2,4,6) representing one orebody, said differences being the basis for determination of the thickness of each orebody.

Abstract: Disclosure is made of a power unit wherein a housing is made split along its longitudinal axis. A tubular elastic vessel is internally coaxially accommodated in the housing. Disposed between the expandable portions of the housing are expanding inserts trapezoidal in section, bearing by their larger bases against the tubular elastic vessel and by the sides, against the inner walls of the housing portions. For delivery of a working medium into the space of the elastic vessel provision is made for two pipe unions, each of which is installed for longitudinal movement in a holder having a flange disposed in a circular recess made on the inner surface of the housing. An electric element surrounding the elastic vessel is installed in the same circular recess. Each of the elastic vessel ends is disposed between the pipe union and the holder.

Abstract: An earring back device consisting of a back clutch movably attached to a bridge mechanism whose ends are inserted into an ornament holder. The ends of the bridge mechanism are inserted through two peripheral channels in the back clutch enabling the clutch to be moved up and down on the bridge mechanism to adjust the distance between the back clutch and the ornament holder, so that a wearer may place the ornament holder in a desired position at the base of her ear lobe.

Abstract: A method and quick disconnect contact for mounting on a pre-drilled circuit board is disclosed. The generally flat contact is provided with two stabilizing portions between the mounting legs. The stabilizing portions form pivot or pressure points spaced from or offset from associated major surfaces of the contact to minimize deformation and likelihood of breakage of the mounting legs upon application of external forces.

Abstract: An apparatus for bioconversion of vegetal raw material comprises a bioreactor communicable with a means for charging this material and discharging the end product. A pressure-sealed chamber for storing excess liquid displaceable from the bioreactor is provided with a liquid level control means and connected to a source of compressed air, atmosphere, inoculator, steam source and bioreactor. A distributor of gas-steam, gas-liquid flows and a flow of inoculum is connected to the liquid level control means and inoculator. Feeders are disposed inside the bioreactor at various levels in terms of height thereof and connected to the flow distributor, a pump being provided between the bioreactor and steam source. A control unit is electrically connected with the bioreactor, steam source, inoculator, compressed air source, a pressure-sealed chamber, flow distributor, and pump.

Abstract: An air-operated reversible percussive action machine comprises a housing in which there is disposed for axial reciprocations a hammer, defining therewith a front working chamber and having a through radial passage. In the axial interior of the hammer on the side of its tail end there is provided a cylindrical stepped tube including coaxially arranged first and second steps of large and small diameters, respectively, these steps having through radial passages. The first step of the tube defines with the hammer a rear working chamber, and with the second step defines an annular cavity in which a spring sleeve capable of axial displacements is disposed. The outer diameter of the sleeve is substantially less than the inner diameter of the first step of the tube to form an annular passage there between. The machine is further provided with a means for pressure-sealing the annular cavity and a means for controlling the displacements of the sleeve.

Abstract: A device for failure detection in series-connected semiconductor rectifiers (1) comprises transformers (2) whose number is equal to that of the rectifiers (1) and which comprise input windings (3), supply windings (6), and additional parallel-connected windings (9), RC-circuits whose number is equal to that of the rectifiers (1), having resistors (4) and capacitors (5), and also a pulse generator (7), and a measuring element (8).The input winding (3) of each transformer (2) has one lead-out thereof connected to a cathode of the respective rectifier (1), and another lead-out to the capacitor (5) of the respective RC-circuit. The resistors (4) of each RC-circuit are connected to the anodes of each rectifier (1). The supply windings (6) of the transformers (2) are connected to one another in series and connected by one terminal to the first lead-out of the pulse generator (7).

Abstract: A device comprising a plate (1) for holding workpieces (11) when handled on a machine tool, and a magnetic field excitation unit which is made in the form of at least one magnetic core (3) mounted on a base (2). A bottom portion (4) of each of the cores (3) is encompassed by a direct-current coil winding (6) and is thickened so as to form, together with the top portions (5), a step for the plate (1) to rest upon. The top portion (5) is accommodated in the interior of the plate (1) and is magnetically insulated therefrom with the aid of elements (7) made of a nonmagnetic material. The area of contact of the plate (1) with the core (3) does not exceed the cross-sectional area of the plate (1) confined within the perimeter of the step of the core (3), while a distance (.tau.) between the axes of the cores (3) is determined by the following relationship: ##EQU1## where B is the magnetic induction corresponding to the magnetic saturation of the material of the plate (1);h is the thickness of the plate (1);P.sub.

Abstract: A light radiation concentrator comprises a frame and at least two radiation concentrating facets secured therein, the facets being made in the form of holograms. The structure of the diffraction gratings of the holograms is such that the concentrating facets have a common focal spot.A method of making a light radiation concentrator consists in using light-sensitive objects, the number of which is equal to the number of the concentrating facets. The light-sensitive objects are secured in the concentrator frame and an interference pattern produced by a collimated reference radiation beam and an object radiation beam diverging from the focal spot is recorded in a sequence on each of the light-sensitive objects. The recording is effected by causing the collimated reference beam to move in parallel with itself and by directing the object beam from the focal spot to the respective light-sensitive object.

Abstract: The mixture includes between 300 and 600 ml. of isopropyl alcohol, 100 to 199 ml. of tincture of green soap, 100 to 199 ml. of glycerin and between 21 and 43 grams of violin rosin. These ingredients are mixed until an amalgamated and homogeneous solution is obtained.

Abstract: A dynamoelectric machine of the type having a distributed armature winding in a cylindrical rotor wound to form axial and substantially radial winding portions and including permanent and/or electromagnets to couple magnetic flux into the peripheral or circumferential surface of the rotor, and to provide interaction between a magnetic field formed beyond the rotor axial surfaces and the rotor to thereby enhance the total induction of flux into the rotor for improved, more efficient operation.

Abstract: A method and apparatus for localizing and excising masses which are not palpable in human tissue. A surgical needle is inserted into a located mass and encircled by a cork screw device which is twisted around the mass until the tip of the worm is just beyond the furthest side of the mass from the operator. Subsequently, the handle of the cork screw device is removed and replaced with a guiding extension rod which is used to direct the surgeon as to the depth of the mass in the patient's tissue. A cutting instrument having an inner cylinder and a hollow outer barrel attached to cutting jaws with knife edges is inserted over one end of the extension rod, with the jaws in an open position, and twisted around the worm of the cork screw into the patient's tissue. The cutting jaws of the instrument are opened by pushing finger flanges away from the surgeon causing the cutting jaws to pivot outwardly into an open position.

Abstract: The improved latch is used for selectively securing and releasing a shelf in a storage unit. This improved latch includes a pivot leg, first and second connecting legs and a support leg. A spring or other biasing means is used between the pivot leg and a bolt of the hinge, and the latch is designed to rotate about the bolt of the hinge. The first connecting leg extends outside of the storage unit, and the second connecting leg extends through a respective side panel of the storage unit and connects the first connecting leg and the support leg. In operation, the upward moving shelf first pushes the latch out of the way and, after the shelf is moved completely upward, the latch springs back into position and the support leg holds the shelf firmly in position.

Abstract: A cooling plate comprises a metallic plate proper provided with openings filled with a refractory material, and a cooling pipe embedded in said plate. The openings extend through the full thickness of the plate and horizontally so that the metallic plate has an S-shaped form. In a vertical plane said openings have the form of a trapezium, and the cooling pipe follows the configuration of the metallic plate.

Abstract: A multiple pass optical system comprising a reflecting objective placed across the path of a radiant flux emitted by an illuminator; the objective being mounted pivotally around its own axis. Further, the radiant flux its incident upon a compound collective comprised of two different-curvature mirrors arranged at right angles to each other.From the lens of the radiant flux, the flux is directed again to the reflecting lens to be reflected therefrom and upon passing the final cycle in the system, it emerges.

Abstract: The inventive method produces round parts consisting of profiled metal sections from a straight, profiled extruded section forming a wheel-like shape having butt ends joined together by welding. Bending the straight section into a round part is accomplished by first adjustably prestressing the straight section and then subjecting the prestressed section to a rolling bending operation. For this purpose, the section to be bent is wound either from one side or from both sides around the outside diameter of coordinated rolling dies the rotating rolling dies being able to additionally perform a translatory motion in the direction of the longitudinal axis of the section. The resulting wheel rim has the rim pan integrally joined to the rim ring.