Abstract: A device for forming a double-curved object comprises a frame, two elongate clamping heads which are arranged parallel to one another on the frame, a support with an exchangeable shaping die, on either side of which support there are clamping heads, and drive means for moving the clamping heads to and fro transversely with respect to their longitudinal direction, along the shaping die in the direction of a working stroke, during which the sheet is stretched and formed, and a return stroke. At least one of the clamping heads is provided with a double-curved shaping piece.

Abstract: A screwdriver comprises a handle, a hollow outer sleeve, at least an inner pipe, and a bit. The rear end of the outer sleeve connects to the handle. The inner pipe is inserted in the interior of the outer sleeve via the front opening of the outer sleeve. A magnetic chuck is disposed at the front end of the inner pipe. The magnetic chuck is inserted in the rear portion of the bit.

Abstract: A hydrogen fuel cell comprising a cathode and an anode is disclosed. An electrolyte is disposed therebetween. The cathode is supplied with oxygen via a porous carbonaceous distribution plate. The anode is supplied with hydrogen. The operation of the fuel cell results in the generation of water. The carbonaceous member is oxidized sufficiently to impart hydrophilicity to the carbonaceous member while retaining mechanical strength and electrical properties.

Abstract: A ring laser gyro has an optical resonator (12), forming a loop- or ring-shaped beam cavity, a lasing medium (14) arranged in the resonator for furnishing, when stimulated, two laser oscillation pulses circulating in the resonator in opposing directions, and a device for measuring the change in frequency and/or wavelength of the laser oscillation pulses as a function of the rotation of the resonator. A saturable absorber (16) is arranged in the laser resonator for the purpose of fixing the standing wave resulting due to the laser oscillation pulses circulating in the opposing directions as regards the laser resonator. Rotation of the laser resonator changes the wavelengths of the laser oscillation pulses circulating in opposing directions. The change in wavelength and/or the difference in the frequencies of the laser oscillation pulses constitute a measure of the rotation rate. No effect making it difficult to measure low rotary speeds in known ring laser gyros occurs in the present ring laser gyro.

Abstract: An apparatus for presentation of apparent three-dimensional images without special viewing glasses is disclosed. A projection system projects right and left stereo images from a stereoscopic slide so that the right stereo image and the left stereo image become superimposed relative to one another on a viewing screen. The viewing screen comprises light transmissive slit-raster members and a light diffusion member. The viewing screen is adapted to allow the right and left stereo images to pass between the opaque raster members and be perceived only by the right and left eyes, respectively, of the viewer as the left image formed in a raster-like manner on the diffusion member is blocked by further opaque raster members and prevented from being perceived by the right eye and the right stereo image also formed in a raster-like manner on the diffusion member is blocked by the further opaque raster members and prevented from being perceived by the left eye.

Abstract: A pigment coating formulation for use in cosmetics and method of application to pigments is disclosed. The combination of a carboxylic acid and a metal salt of a carboxylic acid provides for an improved coating and advantages in pigment suspension, dispersion and product stability in nail polish.

Abstract: A drill is described having a metal bit carrier part on which a sintered metal bit is placed. The bit possesses at least one enclosed helical cooling channel which continues in alignment into a corresponding cooling channel in the bit carrier part. This drill is particularly characterized by very great mechanical and thermal stability, which is not adversely affected in any way by the system of cooling channels in the interior of the drill, so that the service life and cutting power of the drill can be greatly increased. These advantages apply both to twist drills proper and to single-lipped deep-hole drills, for which there is the particular advantage that the geometry of the drill head can be optimally adapted to the particular material to be processed.

Abstract: Described herein is an apparatus for grinding a twist drill bit, especially for web thinning and split pointing of the tip of a twist drill. The apparatus includes a grinding disk and a drill bit holder movable relative thereto mounted on a support. The support may execute relative motion with respect to the grinding disk under cam control in two coordinates and using a grinding disk having an invariable profile, in order to produce tip grinding patterns of various types. Preferably, the cam control is performed by means of interchangeable templates so that it is possible, using only a single grinding disk, no longer subject to the necessity of dressing, to produce a multiplicity of tip surface patterns that are optimally adapted to the given drill bit geometry.

Abstract: An adsorbent layer (stationary phase) for a pressurized layer chromatographic apparatus, for the development of linear chromatogram, is sealed at the edges by impregnation. For the purpose of solvent control some of the adsorbent material is removed in one or several zones of the adsorbent layer near the place of solvent admission, or one or several baffle plates or wires are arranged behind the place(s) of sample application, or if necessary, the adsorbent layer is provided with a conventionally formed concentration zone in the area of the solvent admission. As a result of the impregnation, the migrating solvent composite does not escape at the edges of the adsorbent layer according to the invention in case of overpressure. As a result of the removal of adsorbent material, or the arrangement of baffles or wires, or the application of a concentration zone, the solvent migrates with a straight-line front.

Abstract: An equipment is disclosed for displaying alphanumerical and/or pictorial information offering a high working reliability even in case of unfavorable working conditions.The plate of a display board is provided with a ground-color painted surface wherein one or more apertures are shaped along one or parallelly running more axes. Tiltable masks are arranged behind the aperture/s/ along at least one row in a manner that they may by tilting them be turned through the said aperture/s/ so as to cover each one dot of the surface of the said plate. The color of the masks is differing from the ground-color. The display pattern selection is performed by a mechanism comprising two levers arranged in different heights and angle positions at the body of the mask and co-operating with a fixed buffer and another buffer which can be changed over between two working positions the said buffers being arranged on a carriage displaceable along the plate.

Abstract: The invention relates to an automatic machine tool for machining workpieces, including a number n of workpiece receivers that can be adjusted in angular and/or spatial position and including an equal number n of work stations, one of said work stations being an exchange station, said receivers or stations being disposed at mutual angular separations of 360.degree./n on a rotatable index table, said stations or said receivers being locally fixed thereon and said index table being advanceable in such a manner that each workpiece traverses all stations in the same sequence. By applying the invention reliable and precise machining, coupled with simple construction should be achieved. This is made possible by the fact that the drive of the index table is controllable so that a sequence of (n-1) rotary steps by 360.degree./n in one direction is followed by a rotary step of 360.degree. (n-1)/n in the opposite direction.

Abstract: On one side of a waveguide laser (1), the cavity is terminated by two totally reflecting optical elements or by one totally reflecting element and one (partially) reflecting element (6; 7). The other side of the laser faces the long side (10") of a prism (10), in contact or with spacing, serving to fold the beam. A further prism (11) cooperates with one of the short sides (10') of the prism (10) cooperate to form a variable gap to influence the oscillation of the laser beam. If both of the optical elements (6; 7) are totally reflecting, the beam may be extracted from the cavity at this point. The function of the two prisms is that of a Q-switch with short operating times, which can also be designated as a frustration element.

Abstract: An electrostatically driven electromechanical display device is disclosed. It comprises first electrode means having a reflective face of first reflectivity and second electrode means having a reflective face of second reflectivity, that second reflectivity being different from the first reflectivity. A flexible conductive tongue is disposed between the first and second electrode means. First support means supports the first electrode means with its face in facing spaced relationship to the face of the second electrode means. Second support means supports the tongue between the facing portions of the first and second electrode means in a position where the tongue may be caused to bear against the face of the first electrode means and where the tongue is in contact with the first electrode means and the second electrode means.

Abstract: A tubular discharge vessel for high pressure sodium vapor lamps has a wall 1 made of light-transmitting material. The tube 1 is hermetically sealed at each end by a respective ceramic stopper 2 through which is passed a respective current lead-in wire 11. An electrode 8 is joined via a shank 10 to the current lead-in wire 11. The interior of the tube is filled with noble gas(es) and metal additive(s), e.g. sodium, mercury and/or cadmium. A cavity 9, preferably of rotationally symmetrical shape is formed in at least one of the stoppers 2. In operation of the discharge tube the cavity 9 is the cold spot. i.e. the internal wall of the lowest temperature. The volume of the cavity 9 is at least equal to the volume of the metal additives in their liquid phase.

Abstract: A baking sheet is disclosed which is particularly useful for baking relatively thin confections, such as cookies. Means are provided for preventing the browning or charring of edge portions of the cookie during baking by reducing the transfer of heat to these edge portions.

Abstract: A modular relay incorporated in a plugable element is disclosed. In accordance with the preferred embodiment, the relay is of the bistable type, and in response to actuation, is caused to switch state for a predetermined period of time, thus acting as a monostable device. Structure is disclosed for insuring that the state of the relay is known prior to actuation. A particularly advantageous mounting structure is incorporated within the relay comprising multi-step mounting feet. The energizing circuit in accordance with the invention is disposed within the plug socket.

Abstract: Physiological loading device having a central pedal drive shaft 5 which drives via a freewheel a drum-shaped wheel 21 with inner gearing to which are advantageously coupled three follower gears. These drive, via gearing, an inner shaft 10 which is arranged around the drive shaft. The rotor of an electric rotational motor is arranged at the inner shaft, the rotor being surrounded by an armature 4 with poly-phase winding. The armature 4 is located between an inner and an outer housing part. The rotor windings are supplied with energizing current from sliding contacts, and the armature windings are connected to a braking unit.

Abstract: Digital processing circuit forming a weighted sum of digital signals. It comprises n groups of M series registers (10/1, . . . , 10/nM) into which are introduced the signals to be processed, n multiplexers (15/1, 15/2, . . . , 15/n), a memory (20) containing precalculated quantities characteristic of the weighted sum to be formed, said memory having a capacity of 2 .sup..beta.+n words distributed into different blocks, a modulo M counter (25), an adder-subtracter (30) connected to the memory, an accumulator-register (40) connected to the adder-subtracter and a clock (50) actuating the counter and the registers. The circuit is in that the memory is subdivided into [M-(2.sup..beta. -M)] blocks of 2.sup.n words and into (2.sup..beta. -M) blocks of 2.sup.n+1 words, said blocks being selected by the bits supplied to the outputs of the counter, in that it comprises supplementary series registers, whose number is at the most equal to 2.sup..beta.

Abstract: A toy with balls which is provided with a playing field. The playing field is formed on at least one rotatable disc (92), where the disc (2) is provided with holes (3), the size of which allows falling of the balls (4) freely therethrough. Furthermore it is provided with an assorting unit (6) connectible with the hole (3) of the disc (2), wherein the disc (2) is arranged in cup-shaped house (1) to be held in the hand having a cover (1a) and a side which are made of transparent material. The assorting unit (6) is firmly fixed. The assorting chamber (16) formed below the disc (2) and has as many guiding recesses (11) as the number of holes (3) of disc (2), and wherein the lower end of the guiding recesses (11) is connectible through outlets (17) of a rotatable null-setting disc (13) with a collecting space (18), which is in communication with a preparatory space ( 21) through channel (22), where a feeding key (23) is built in between the preparatory space (21) and playing space (9) above the disc (2).