Abstract: An electric heating device for heating the interior of a cabinet containing electrical apparatus, such as a switch or distribution apparatus, to prevent sweating or condensation therein, includes at least one PTC electrical resistance heating and temperature self-regulating heating element situated in the interior of an elongated body made of thermally conductive material that is thermally connected to a radiator. The radiator is formed by a pair of flat base plates extending laterally from opposite sides of the body and radiator fins extending only from the base plates and only from one flat side thereof. The body is a massive hollow element having a wall thickness greater than that of the base plates and fins and a height greater than the thickness of the base plates. The body, base plates and fins are formed as a one piece extrusion. A permanent magnet may be used to secure the body to the interior surface of a steel cabinet.

Abstract: A magazine for a protected storage of a set of drills and for enabling a selective withdrawal of drills arranged in individual pockets in the magazine. The magazine includes a flat magazine body having narrow end faces with at least two straight rows of parallel pockets being provided in the magazine body into which drills are inserted and are accommodated over their full length. The pockets have an open end which opens in a direction of one of the narrow end faces. The narrow end faces of the magazine body are interconnected by curved transistion faces and form a sliding face for a covering strip which is slidably guided along a narrow surface area of the magazine body, which surface area is formed by the narrow end faces and the curved transistion faces. The covering strip includes a number of selector openings corresponding to the number of rows of pockets in the magazine body.

Abstract: An electrical heating element for fluid media, more particularly for hot air appliances, comprising a support member of insulating material and at least two heating conductors which are made of resistance wire and which surround the support member, the heating conductors being wound as helical coils and supported on supporting edges of the support member, the coils being wound with radial spacing from one another. The heating conductors may comprise an outer coil consisting of a resistance wire of high specific power consumption and an inner coil consisting of a resistance wire of low specific power consumption. The support member may comprise a tubular body with ribs projecting radially at the periphery, said ribs forming the supporting edges. The outer ribs may be U-shaped extending from end to end of the tubular body and forming passages through which the turns of the inner coil pass. The ribs preferably comprise mica strips; various mounting means for such strips are described.

Abstract: A heating system in which the rpm of the combustion air blower can be selectively decreased by an especially simple and economical arrangement and is achieved by selectively connecting an incandescent plug, utilized for igniting the fuel-mixture only during the starting period, as a series resistor to the electric motor driving the combustion air blower after completion of the starting period. In accordance with a preferred embodiment, connecting of the incandescent plug as a series resistor is produced by way of a relay operated contact and an actuating circuit therefor, a selectively closable switch and a contact of a combustion monitoring thermostat being located in the actuating circuit for controlling activation of the relay operated contact.

Abstract: A roll bar for vehicles, especially motor vehicles, comprises two vertical segments mounted on opposite sides of the body which are connected together by at least one cross member. Each segment comprises, according to a preferred embodiment, two elements of the same profile which withstand deformations that increase the section modulus, said elements being formed by roll sections assembled to form a hollow member and connected to one another by welding, gluing, or the like. According to a particularly advantageous arrangement, each segment, as viewed in cross section, comprises two tubular structures that are joined to a common rib.

Abstract: An ink-jet printing apparatus having a plurality of nozzles for projecting ink droplets which are selectively deposited on a printing medium in accordance with an information signal so as to form a printed pattern, such ink-jet printing apparatus comprising means for causing ink droplets used for printing to project from each nozzle in accordance with an information signal, a common power source for supplying a desired voltage to the ink-drop forming means provided at each nozzle thereby operating them, and switching means connected between the ink-drop forming means and the common power source and controlled by the information signal, the output of the power source being selectively supplied through the switching means to the ink-drop forming means, so that the driving system for driving the ink-drop forming means and the control system therefor can be separately provided, thus enabling a number of nozzles to be effectively controlled by a lowest control voltage.

Abstract: A sliding roof for automobiles with a sliding top for closing a roof aperture in its closed position and which can be selectively lowered from its closed position and pushed underneath a fixed rearward roof section or can be swung out in an upward direction is provided with constraining or guide plates which are adjustable in the longitudinal direction of lateral guides for the sliding top. During closing of the sliding top, a guide member fixedly joined to the sliding top contacts these guide plates to direct the closed sliding top into its forward end position. Since these guide plates must be set in their proper positional relationship with the sliding top in its closed position, but can only be fixedly secured with the top in an open position, in accordance with a preferred embodiment, detent elements are provided which act to at least temporarily retain the guide plates in a position to which they have been adjusted without the securing element for the guide plates being engaged.

Abstract: A valve for controlling the inlet and outflow of fluid into a housing chamber is provided. In order to minimize the forces necessary to move the sealing body, while also assuring a reliable sealing of inlet and outlet openings on a sealing surface of the valve housing, the sealing bodies are constructed of elastic flexible loops that are unrollable over the sealing surface. In particularly preferred embodiments, magnetic means are provided for selectively moving the sealing body to open and close the respective openings.

Abstract: When an ink stream spouting from a nozzle is subjected to mechanical vibrations of a certain magnitude, the fore end of the ink stream alternately separates into larger and smaller ink droplets in synchronism with the vibrations. This invention varies the flight velocity of the small-diameter ink droplets relative to that of the large-diameter ink droplets according to information to-be-recorded and thus controls the union between the large- and small-diameter ink droplets. By exploiting the difference between the amounts of deflection of the large-diameter ink droplet and a united ink droplet created by the union of the large- and small-diameter ink droplets, the information is recorded on a recording medium.

Abstract: A viewing angle measuring device for automotive vehicles. The measuring device includes an elliptical template representing a so-called visual ellipse. The template is arranged in the vehicle in a prescribed position with respect to a driver's seat regarding a center position and an axial inclination. A measuring beam projector may be guided with its optical axis and/or with a measuring beam tangentially along a governing curve of the elliptical template. A goniometer, continuously indicating the viewing angle, is connected to the measuring beam projector to determine the beam direction with respect to a reference plane as a measure of the viewing angle.

Abstract: A control logic for an elevator servicing a plurality of floors of a building comprises two microcomputers. The two microcomputers are provided with abnormal state detectors of their own. When the abnormal state detector of one microcomputer is actuated, the elevator is operated for recovery to the nearest floor by the other microcomputer on the condition that the abnormal state detector of the other microcomputer is not actuated, and thereafter retrial for the abnormal microcomputer is effected by an instruction from the other microcomputer. When the abnormal microcomputer recovers to normal state by the retrial, the elevator keeps operating, thereby preventing such a problem that the elevator cannot continue service by erroneous operation due to noise.

Abstract: A color picture tube with an in-line multi-stage focusing type electron gun assembly which can suppress generation of spark discharges and which can be improved in withstand voltage characteristics. The electron gun assembly comprises a metallic shielding member facing the fluorescent screen and maintained at the anode potential. The shielding member is displaced, in the direction of a tube axis and toward the base, from an edge facing the base of an inner graphite coating formed on the inner wall of the neck tube by a predetermined distance or more. The metallic shielding member shields electrostatically the edge of the inner graphite coating from the grid electrodes and cathode electrode close to the base and at lower potentials. At least one of focusing voltage feed conductors for third and fifth grid electrodes is wired so as to run through a gap between the inner wall of the neck tube and a bead glass for supporting the electrodes of the electron gun assembly.

Abstract: A centrifugal separator comprises a centrifugation chamber, gas inlet ports for introducing a gas into the centrifugation chamber so as to whirl the gas, a clean gas discharge pipe provided on the upper portion of the centrifugation chamber, and a guide member secured to the lower portion of the centrifugation chamber. The guide member has an annular groove, outer fine holes made in the groove, a guide portion projecting conically inward the centrifugation chamber, and an inner hole made in the center of the guide portion. A gas including particles is introduced into the centrifugation chamber, in which the particles are separated. The separated particles are trapped in the groove with gas, then discharged from the outer holes. The clean gas removed of the particles is guided by the guide member to direct to the gas discharge pipe, at the same time the particles with gas toward the guide member also are guided by the guide member to be subjected to the centrifugal force.

Abstract: An elongated heater unit including an elongated resistor helix, terminals connected to the ends of the helix, at least a first surrounding metallic sheath, powder insulation material disposed within the first sheath and spacing the resistor helix from the sheath. The sheath is provided with at least one indentation and/or groove extending along at least a portion of the length of the first sheath. The method for constructing the heater unit includes forming the indentation by means of a roll with a protrusion, by utilizing a mandrel, by utilizing a temperature sensitive member or by utilizing a reducing sheath.

Abstract: An AM stereophonic demodulator circuit for an amplitude/angle modulation system, comprising an AM detector circuit for producing a stereophonic sum signal (L+R), an FM or PM detector circuit for producing a stereophonic difference signal (L-R), and control means for extracting a DC voltage proportional to an antenna input level from the AM detector circuit so as to use the DC voltage to control the gain and amplitude of an FM or PM detector stage including the FM or PM detector circuit.

Abstract: A sensing membrane is fixed to one end of a tube comprising polyvinyl chloride. An aqueous sodium chloride solution is contained in the tube, and is in contact with an internal electrode wire. The sensing membrane comprises a support substance of polyvinyl chloride, a sensing substance of quaternary ammonium salt having an alkyl chain having 8 to 16 carbon atoms, and a plasticizer of normal decyl alcohol. Anions in a body fluid sample can be measured with a small measurement error by an electrode provided with the sensing membrane of that composition.

Abstract: A chroma signal gain control circuit is constructed to include a first band pass amplifier, a second band pass amplifier, a burst gate circuit, a switch circuit and an ACC detecting circuit. The output signal of the first band pass amplifier is fed to the input of the second band pass amplifier, the output signal of which is fed to the input of the burst gate circuit. The switch circuit selectively transmits either the output of the burst gate circuit or the output of the second band pass amplifier to the ACC detecting circuit. The gain of the first band pass amplifier is controlled by feeding the detected output of the ACC detecting circuit to the first band pass amplifier. In order to prevent over-saturation in case the level ratio (C/B) between the color burst signal and the chroma signal exceeds a predetermined value, the switch circuit will selectively transmit the output of the second band pass amplifier to the ACC detecting circuit.

Abstract: An instrument for locating the position of hidden live continuous or broken wires utilizes an indicator such as a series of light emitting diodes to indicate the adjacency or the strength of the electrostatic field surrounding the wire. By watching the number of light emitting diodes lit, the instrument can be brought directly to the wire. The instrument is comprised of an antenna connected to the high input impedance of an amplifier, a low pass filter connected to the output of the amplifier, a lamp operation circuit and an indication means connected to the lamp operation circuit.