Abstract: A device is provided for use in a proximity-type fuze which includes a rectangular wave generator, the output of which is differentiated to provide pulses for exciting an antenna, which pulses are at the same time used to bias one or more diodes to conduction for passing signals reflected by a target to a sawtooth wave generator whose sawtooth output has its magnitude and period controlled by the differentiated pulses, the sawtooth output having its magnitude controlled by the signals reflected from the target and particularly the time relationship of the latter relative to the period of the rectangular wave.

Abstract: A molding has an elongated plastic molding body in which there is provided a longitudinally extending channel-like recess having side walls and an open top. The molding body has lips bounding at least opposite longitudinal edges of the recess at the top for reducing the area of opening of the recess. An elongated metal strip is received in the recess. The lips extend over and engage marginal zones of the outer face of the metal strip.

Abstract: A static frequency changer for feeding a synchronous machine and composed of a mains side static converter, a machine side static converter and a direct current intermediate circuit connected between the converters, is further provided with an additional static converter connected at the machine side in parallel opposition to the machine side static converter, and a direct voltage capacitor connected in parallel to the additional converter.

Abstract: A cardiac pacemaker constructed for terminating tachyarrhythmias and including: an atrial electrode implantable in a patient's heart for supplying atrial stimulation pulses thereto and at which a pulse appears in response to each atrial contraction; a ventricular electrode implantable in the patient's heart for supplying ventricular stimulation pulses thereto, and at which a pulse appears in response to each ventricular contraction; separately switchable control paths connected to each electrode for causing one electrode to produce a stimulation pulse at a given time after the occurrence of a pulse on the other electrode; a first time delay unit connected to be actuated by signals derived from the heart behavior for supplying a stimulating pulse to the ventricular electrode at a time after the occurrence of a pulse on the atrial electrode, which is shorter than the physiological atrial-ventricular transfer time; and a second time delay unit connected to be actuated by signals derived from the heart behavior f

Abstract: An oral cavity cleaner including a pump unit for supplying a pulsating stream of high-pressure fluid, and a toothbrush unit connected thereto via a flexible conduit. The toothbrush unit includes an actuating member responsive to the pressure of the pulsating stream of fluid to provide a reciprocatory movement, a toothbrush connected to the actuating member, a valve section brought to an open position when the movement of the actuating member has exceeded a predetermined value, and an operating member for operating the valve section. The toothbrush can be automatically given a reciprocatory movement, and the high-pressure fluid can be ejected through the toothbrush or its ejection can be stopped as desired by manipulating the operating member while the toothbrush is being moved with a reciprocatory movement.

Abstract: A motor cycle including a frame and a fairing mounted on the frame, the fairing comprising a molded shell formed to provide a bridge portion having two depending side portions which define with the bridge portion a cavity of generally inverted U-shape in cross-section, a hollow front portion extending upwardly and forwardly from the side portions and forwardly from the bridge portion, and a rear portion extending rearwardly from the brige portion. The side portions are formed with rearwardly directed faces carrying leg protectors each having an outer lip to restrain movement of a rider's legs outwardly from behind the protector. The cavity in the fairing shell is filled with foam plastics material. The fairing protects a fuel tank against impact, either having the tank housed in it or being formed with side panels which at least partially cover the sides of the tank.

Abstract: A circuit arrangement for converting high frequencies to intermediate frequencies by mixing with a heterodyne frequency, wherein the high frequency signal input is connected to the signal output of the circuit arrangement via the primary winding of a polarity reversing transformer which is controlled such that the high frequency input signal appears at the signal output, alternatingly once directly and once with reversed polarity in the rhythm of the heterodyne frequency, and thus the high frequency signal is mixed with the heterodyne frequency. The polarity reversal is controlled by alternatingly opening and short-circuiting the secondary winding of the polarity reversing transformer in push-pull with the center tap of the primary winding by means of electronic switching circuits responsive to the heterodyne frequency.

Abstract: The invention relates to secondary radar responders which provide a reply in response to a radar signal received from a primary radar transmitter. The frequency of the received radar signal is monitored by the responder and the frequency of the response is brought into agreement therewith so that the response can be received by the primary radar transmitter at its transmission frequency. The invention is particularly applicable to marine radar systems and the responder may form part of a racon or transponder.

Abstract: A digital to analog converter comprising a first digital to analog converter for generating an output signal of higher order bits; a second digital to analog converter for generating a full scale output as an output signal of lower order bits which is always larger than the output value (1 LSB) corresponding to one bit of a digital input at the least significant bit of the first digital to analog converter; adding means for adding the output signal from the first digital to analog converter to the output signal from the second digital to analog converter to form an analog output signal; and a code converter for applying to the first and second digital to analog converters an input code obtained by shifting a digital input signal applied to the first and second digital to analog converters by a given value such that the relationship between the digital input signal and the analog output signal is made substantially linear.

Abstract: A method for welding bodies made of very hard or highly refined armor steel, particularly objects to be armored against the penetration of projectiles, flying bodies, splinters or the like, wherein armor steel bodies arranged in juxtaposition with a gap therebetween are provided, in the region of the root of the joint, with preferably one bar each, and/or a filler body of, in particular, an unalloyed steel is arranged in the joint so as to cover the joint gap. The armor steel bodies are welded together without preheating with a suitable ferritic welding material, of like base, under a protective gas atmosphere and after cooling of the weld seam from the welding heat to not less than 100.degree. C., the weld seam is heated locally and progressively without any holding period to at least 450.degree. C. and subsequently, without maintaining a certain ambient temperature and/or period of time, the weld seam is cooled to ambient temperature in air.

Abstract: A feedforward amplifier is designed to exhibit particularly linear transfer characteristics in which distortion signals introduced by the amplifier itself are monitored and the phase and amplitude characteristics of respective adaptive equalizers are modified to reduce any distortions at these points. A reference signal is injected directly into a main amplifying element so that it appears at the output terminal as though it were an amplified induced distortion. The characteristics of the amplifier are adaptively modified to eliminate the reference signal from the output signal.

Abstract: A stringed musical instrument, e.g. a bow instrument or an electric guitar, is disclosed comprising a substantially rigid body and a plurality of strings attached at one end to a tailpiece. A flexible soundboard of acoustic material bears through one edge against the instrument body and through an opposite edge against the tailpiece. The soundboard freely extends between the one edge and the opposite edge and the tailpiece is fulcrumed on the instrument body. Upon tensioning the strings the soundboard is arched between the instrument body and the tailpiece. Preferably, the soundboard is of arcuate shape with its convex side facing the strings.

Abstract: In a television camera having an image pickup tube and an iris for controlling an amount of incident light upon the pickup tube both in an automatic control mode and in a manual control mode by selectively actualing a mode selection switch, an additional switch is connected in parallel with the mode selection switch and when a main power switch is made off, said additional switch is closed for a given time period during which the iris is driven into its minimum aperture state.

Abstract: A system for generating in-phase alternating current components which are fed into a medium held in a melting trough and flow in the medium between electrodes and counterelectrodes immersed in the medium to effect resistance heating. One embodiment of the system includes a supply voltage source, and a plurality of transformers each having a primary winding and a secondary winding, with the primary windings being connected together in series and to the source, each secondary winding being connected between a respective electrode and counterelectrode to provide a respective alternating current component, and each winding having a number of turns corresponding to the desired relative amplitudes of the current components.

Abstract: In a method and apparatus for transmitting digital signals by means of signal generators by initially converting a double current pulse train, under control of bit clock pulses and before transmission, into a first unipolar pulse train composed of pulses corresponding to all positive transmission pulses and into a second unipolar pulse train composed of pulses corresponding to all negative transmission pulses, the pulse trains are code converted independently of the duration of the bit clock pulses for producing a converted signal having a first transmitting amplitude in correspondence with each pulse of the first pulse train and a second transmitting amplitude in correspondence with each pulse of the second pulse train, the second amplitude differing from the first, and the converted signal is applied to a signal generator for producing an output signal corresponding to the converted signal and in which the transmitting amplitudes corresponding to both unipolar pulse trains vary the output signal in the same

Abstract: A furnace for the melting of glass in which horizontally spaced regions of the molten glass body are heated by passage of alternating electric current between diagonally opposed electrodes of two groups and supplied from a primary power supply circuit, and in an intervening zone above a withdrawal path leading to an outlet auxiliary electrodes spaced apart longitudinally of the zone are fed with current from an auxiliary supply circuit including regulators providing for adjustment of the heating effect along different parts of the zone to set up a convective effect balancing any downward pull which could draw unrefined glass or batch material into the withdrawal path.

Abstract: A heating apparatus, or more particularly a heating-time displaying means which is applicable for a heating apparatus with a programmable timer which is capable of controlling the sequence heating. The heating apparatus comprises heating sources such as magnetron and/or heater for heating a product to be heated, output switching means for switching the output of said heating source into at least two steps, output setting means for presetting the output specified by said output switching means, timer means for controlling the heating time, heating time setting means for presetting the heating time to said timer means, a memory for storing the output and heating time entered by said output setting means and said heat time setting means, display means for displaying the entered output and heating time, and a main controller for controlling said heating source and said memory and all of said means, and stage recall means for recalling the heating pattern of a selected stage.

Abstract: A boiler comprising a furnace box, having a peripheral wall, from which products of combustion pass to a smoke box wherein the furnace box comprises a lower compartment, means to establish a fluidized bed in the lower compartment, an upper compartment, an exit connected to said upper compartment for passage of products of combustion from said furnace box, means to isolate said lower compartment from said exit except by communication through said upper compartment and through a foraminous element located in the path of the products of combustion from said lower compartment to said upper compartment.

Abstract: A metallic syringe tube is fused to a plastic fitting into which the tube is inserted so that the inner end of the tube contacts the fitting, by clamping the tube between a counterelectrode which acts as an abutment for the inner end of the tube and a clamping jaw which engages the free end of the tube, and applying a resistance heating voltage to the tube between the counterelectrode and a location between the fitting and the clamping jaw for heating at least a portion of the syringe tube inner end in contact with the fitting to the melting temperature of the plastic forming the fitting.