Abstract: A windshield washing and deicing system comprising a reservoir for containing washer fluid having a sealed container supported therein. A pump is effective to transfer washer fluid from the reservoir to the container and from the container to a plurality of nozzles located adjacent a vehicle window. A conduit is located in the reservoir for carrying heated engine coolant through the reservoir to heat the washer fluid therein. An electrical resistance wire is provided for further heating the washer fluid in the container whenever the temperature of the fluid in the container is below a predetermined minimum to quickly deice the vehicle window.

Abstract: When carrying out electric fusion welding with at least two current-carrying electrodes, these electrodes are held in a joint holder in non-parallel positions so that they meet in a point of intersection in which melting of the electrode material takes place. Hereby the risk of burn-through is minimized and an additional degree of freedom which can be used for controlling purposes is obtained.

Abstract: In an apparatus for locating inhomogeneities in otherwise homogeneous bodies by the ultrasonic pulse-echo method an angle probe is used in connection with an acoustic signal emitter, adapted to produce an audible signal, a characteristic of which, e.g. the intensity, varies in a continuous manner with the amplitude of the reflected ultrasonic pulses.

Abstract: A method and apparatus for processing piezoelectric bodies to have a permanent polarization for use as electroacoustic transducers or the like are described. During the application of a constant polarizing electric field to a piezoelectric body, the surfaces of the body, which for example, might be in the shape of a disc, have applied thereto a surface pressure. A clamping device having smooth surfaces is used for this purpose.

Abstract: In an electronic computer, an arrangement for retrieving by means of search key words, information records on a record carrier having index key words associated with the records. The search key word is compared in succession with the index key words for identifying the position of the index key word on the carrier. The position of the index key word on the carrier enables the identification of the location of the record associated with the search keyword. The location so identified is used for accessing the information record associated with the search key word.

Abstract: A continuous torque rotary engine comprising a drive shaft having a rotor secured thereto. The rotor carries a plurality of radial sliding blades and is surrounded by an outer stationary cylinder between which a plurality of pressure chambers are formed by means of chamber separators. Rotatable hump plates transfer the blades into and out of the pressure chambers to clear the chamber separators during rotor rotation. Identical end covers having an annular chamber close the stationary cylinder and connect pressure and exhaust ports in each of the pressure chambers to a pressurized fluid supply and an exhaust outlet, respectively.

Abstract: A n-channel storge field effect election device having a floating gate completely surrounded by insulating material is described. During writing in the storage the floating gate is charged negatively by hot elections generated in its own channel by channel injection. After charging, and particularly during reading, the gate inhibits drain to source current, by means of its negative charge.

Abstract: In a two-wire, full duplex data transmission system a circuit arrangement is described for carrying out an automatic adjustment of the value of the current flowing from the transmitter in a given station to a receiver therein relative to the value of the current supplied to that receiver from another station over a transmission line. A balancing circuit receives the station transmitter current and divides it into a plurality of sub-currents which are subsequently recombined and conducted to the station's receiver. The station transmitter current and the received current values are compared, and a voltage proportional to the difference is produced. That voltage is utilized by a regulating stage to produce a number of regulating voltages corresponding to the number of sub-current carrying branches in the balancing circuit for regulating the amplification of the sub-currents.

Abstract: A system for sensing the flow of an electrically conductive liquid through a nozzle. The nozzle represents one side of an electrical sensing circuit. A conductive probe is positioned near the nozzle, so that it extends into the spray. The probe represents the second side of the electrical sensing circuit. The probe is mounted on a clamp positioned on the inside of a protective enclosure. The probe is the bottom of the enclosure. When liquid sprays from the nozzle, the sensing circuit is closed. A switch responds to this by illuminating an indicator lamp. If the liquid flow ceases, the signal circuit is opened, and the switch signals this occurrence. The switch is a transistor that operates a light emitting diode.

Abstract: A method for tin plating printed boards is disclosed wherein faulty bonding is prevented by masking the printed boards with a heat and solder resistant coating material. This coating material is selectively applied to the printed boards in those areas where misbonding due to gap bridging and bubble formation is most likely to occur. For example, a small amount of coating material may be applied across conductor paths between two adjacent areas. In addition, the coating material may be evenly distributed in a grid like fashion throughout the area of the printed boards. Where the tin plating process is a wave soldering process, the coating material may be applied in the direction of conveyance of the printed board in order to avoid interference with the discharge of the tin.

Abstract: A mechanism for reversing the movement of an inked ribbon in an office printing machine or the like comprising first and second rotors each for effecting the rotation of one of two ribbon spools on which the ribbon is mounted and a driving element for alternately imparting a driving force to one of the rotors. The driving element is alternately selectively coupled to one of the two rotors to effect the reversal of the movement of the ribbon. A reversing member is shiftable between a first position wherein the driving element is coupled to the first rotor and a second position wherein the driving element is coupled to the second rotor. The reversing member is resiliently coupled to the driving element for rotational movement therewith. The reversing member is maintained in one of the two positions and is permitted to shift to the other of the two positions in response to the application of a predetermined torque.

Abstract: A pressure vessel base closure means including a pair of flat disc-like members spaced apart by a peripheral outer cylindrical member and an inner perforated cylindrical member, and there being provided between the two flat disc-like members a plurality of radially directed ribs to provide rigidity to the base closure means. The base closure means is particularly useful for a reactor in which a bed of fluidized solid is maintained by the passage of a gas into the reactor through the base via the chamber between the two flat disc-like members.

Abstract: An inked ribbon cartridge is removably mountable in a printing machine of the type comprising a support for the cartridge, two transport elements engageable with two spools, respectively, of the cartridge around which the ribbon is wound, two sensing elements for sensing the amount of the ribbon wound on the two spools, respectively, of the cartridge, a ribbon movement reversing mechanism controlled by the sensing elements for determining the direction of the rotation of the two shafts, and a control element for shifting the sensing elements from an operative position in which they sense the ribbon to an inoperative position in which they are disengaged from the spools.

Abstract: An electroencephalograph (EEG) is connected to record the brain wave response of a subject to periodic stimuli. An EEG analyzer comprising a dual integrator circuit separately records positive and negative wave responses to the stimuli during predetermined intervals and combines the recorded responses in a composite analysis of the subject's response to the periodic stimuli.

Abstract: A piston for an internal combustion engine, said piston having a combustion chamber formed in its head, the combustion chamber having an inlet orifice in the top surface of the head, a flat bottom wall, and a side wall which includes a plurality of concave recesses which intersect to define cusps directed towards a central zone of the combustion chamber, said cusps including concavely curved portions which extend upwardly from the flat bottom wall and inclined portions which extend between the curved portions and the top surface of the head along the surface of an imaginary cone having its apex above said top surface.

Abstract: 1. A continuous cyclic process for preparing hydrazine comprising the step of:(a) contacting in a non-aqueous medium at least one haloamine of the formula NH.sub.2 --X, wherein X is a halogen, with at least one material selected from the group consisting of the metals of Groups IA and IIA and the amides thereof to provide an anhydrous mixture containing hydrazine and a metal halide;(b) separating said hydrazine from said anhydrous mixture;(c) subjecting the hydrazine-poor residue of step (b) to direct current electrolysis to separate the metal component and the halogen component of said metal halide from each other; and(d) recycling said metal for reaction with fresh haloamine in step (a).

Abstract: Surface precure of amine-aldehyde resins employed in the manufacture of composition board can be prevented by adding a water soluble thiosulfate salt, e.g., sodium thiosulfate, to the resin.

Abstract: A machine is disclosed for producing rigid sand cores from a molding mixture of a refractory granular material such as sand and a hardenable binder. These rigid sand cores then are used in foundries for metal casting. The machine of the present invention is capable of producing several different types of rigid sand cores including hollow shell sand cores, hot box cores and cold box cores. The machine includes means for curing the molding mixture used to produce shell sand cores and hot box cores by applying heat to the molding mixture after it is placed in a core or molding box. Other means are provided in the machine for curing cold box cores by applying a gas catalyst to the molding mixture after it is placed in the core box. The machine of the present invention is automatically controlled by a circuit arrangement which can be programmed by the machine operator.

Abstract: Apparatus is described for monitoring and, if necessary, correcting the polarity of a transmitted data signal. Syndrome signals are produced in accordance with the error pattern of the transmitted data signal. Coincidences between block timing pulses and the syndrome signal and block timing pulses and an inverted syndrome signal are counted, and when the respective counts reach predetermined levels counted output signals are produced. A polarity signal indicating proper or improper data signal polarity is produced from the counted output signals. The polarity of the transmitted data signal is adjusted in accordance with the value of the polarity signal.

Abstract: A switching arrangement by which a telecommunication subscriber station selection unit is connected into the central office line is described. The selection unit involved is of the key-operated type wherein key actuation produces a specific surge current corresponding to the specific key depressed. Semiconductor elements form impulse contacts which are operated by a key-controlled pulse generator. A bistable relay is provided for disabling the station's speech circuit during the dialing phase, and at the same time maintains a transmission and feeder circuit, of which the selection unit forms a part and which is completed by actuation of a key. The operation of the bistable relay is influenced via a parallel circuit which offers a high impedance to the transmission and feeder circuit, so that the bistable relay can be rendered inoperative if it is erroneously in an operative state. Depression of a key is required to close the transmitter and feeder circuit, and when this occurs, i.e.