Abstract: An image forming apparatus in which a recording medium is scanned with plural light beams. The apparatus includes a beam generator for generating plural light beams, a scanner for scanning with the light beams, and an optical system for reducing the distance between the plural light beams on the recording medium.
Abstract: The timer switch comprises a setting member for setting a desired period, an escape wheel provided with saw-shaped teeth, a rack interposed between the setting member and the escape wheel for disengaging the setting member from the escape member while the setting member is operated and engaging the setting member with the escape wheel while the escape wheel turns, an anchor provided with a pair of claws, which is disposed so as to be opposed to the escape wheel, an electromagnetic member which begins to rock the anchor intermittently when the setting member is operated, so that the claws of the anchor are alternately engaged with the escape wheel. When the setting member is moved either along or about its axis, the escape wheel is disengaged from the setting member and the electromagnetic member begins to rock the anchor intermittently so that the claws of the anchor are alternately engaged with the escape wheel.
Abstract: In an overhead electric transmission system in which an overhead conductor includes at least one optical fibre constituting part of an optical communication system, there is provided, at a tower along the system, an electrically conductive rod supported by and electrically insulated by an insulator from the cross-arm of the tower but electrically connected to earth through the primary winding of a step-down voltage transformer. The rod is substantially horizontal and substantially parallel to a group of overhead electric conductors suspended from the cross-arm by an insulator. The surface area of the metal rod and its position with respect to the group of current-carrying conductors of the system are such that electrical power for regenerators or other ancillary equipment of the optical communication system is provided across the secondary winding of the transformer, thereby affording simple and inexpensive means of providing such power.
Abstract: An electrical circuit is provided for actuating the trip mechanism of a circuit interrupter and includes a current sensor having a pair of output terminals and designed to cooperate with at least one electrical power conductor to sense the amount of current flowing in that conductor. The circuit further includes a circuit neutral terminal. A power supply is provided having input terminals with one of the input terminals being connected to one of the output terminals of the current sensor for receiving the sensed current signal therefrom, the other of the input terminals being connected to the circuit neutral terminal. The power supply produces output power at a first voltage level during a first mode of operation of the electrical circuit and produces output power at a second voltage level during a second mode of operation of the electrical circuit, with the second voltage level being substantially higher than the first voltage level.
Abstract: A power source voltage change discrimination circuit includes a voltage selection circuit for selectively supplying the greater one of main and auxiliary power source voltages, and a series circuit of a resistor and a capacitor coupled between the output terminal of the voltage selection circuit and ground. There is further provided a Schmitt circuit having hysteresis characteristics whose input terminal is coupled to a junction of the resistor and capacitor.
Abstract: A contact-controlled capacitive switching means utilized as a floor or cabin calling transmitter for lifts or the like is designed such that travel or drive commands for the lift are prevented from being generated by the action of heat or, if generated, from being further transmitted to a lift control system. Therefore, a thermal circuit breaker is interconnected between an actuating element, such as a contact button and a coupling member connected to an input of an oscillator. The thermal circuit breaker may be mounted directly at the contact button or at a mounting plate carrying the contact button. A further thermal circuit breaker is interconnected between an output of the switching means and a connection terminal of a signal transmitting line of the lift control system.
Abstract: Two rectifiers and two inverters are operated under the state under which they are connected in parallel by common transmission lines. These rectifiers and inverters are controlled an independent control apparatus respectively which can selectively apply either the constant current control or the constant voltage control.The control apparatus of each converter has bestowed thereon the reference value of a current to flow through the particular converter and the reference value of a terminal voltage of the particular converter. A signal for lowering the current reference value is added to the control apparatus of one or all of the converters which are to be operated as the inverters. On the other hand, a signal for essentially rendering the terminal voltage of the converter smaller than the voltage reference value is added to the control apparatus of the converter which is to be operated as the converter for determining the voltage of a direct current system.
Abstract: A print-distortion compensating apparatus and method for an improved electrostatic type ink jet printing apparatus including a print-distortion compensating means, in which the compensating amounts for the print-distortion due to the influence of the neighboring ink droplets, such print-distortion being variable depending on the respective deflection steps, for instance, the print-distortion caused by the variation of aerodynamic resistance due to the preceding ink droplets, the Coulomb's force due to the preceding and subsequent charged ink droplets, and the charge induction due to the preceding charged ink droplets are memorized into and read out from the afore-mentioned print-distortion compensating means and those are finally added to or not added to the basic charging codes depending on presence or absence of the PRINT data on the ink droplets adjacent to an ink droplet to be charged.
Abstract: An audio component coupler connects to separate components in an audio system through their power terminals and integrates the components into a unified system in which the components are, at the selection of the user, responsive to either the automatic shut-off of a "master" component having internal automatic shut-off capability or to the operation of a slave component in a predetermined sequence. Control in either case is effectuated wholly from the components themselves and not from the coupler which may thus be placed remote from the components and even in a location not conveniently accessible to the user.
Abstract: An automotive accessory control system provides a single, centralized electronic control circuit for automatic switching of exterior lighting, intermittent windshield wiper operation, electric window defogger control and instrument panel lighting control.
Abstract: Apparatus is adapted for connection to an alternating current source and a direct current power supply powered by the source. The supply is enabled when the source is operative and disabled when the source is inoperative. The apparatus utilizes first, second and third terminals. A power line monitor is connected at its input to said source and at its output to said first terminal. The monitor maintains the first terminal at a selected potential when the source is enabled, and is unable to maintain the first terminal at any potential when the source is disabled. A first circuit connected to the supply, a battery and the second terminal to charge said battery and to maintain the second terminal at a selected potential when the supply is enabled. The battery maintains the second terminal at the selected potential when the supply is disabled. The first circuit is connected via a resistor to the first terminal to maintain the first terminal at a different potential when the monitor is inoperative.
Abstract: Conservation system for use with a power source which supplies power over premises wiring to utilization equipment such as lighting equipment. Contactors and a control system are provided to temporarily interrupt the supplying of power from the power source to at least a portion of the utilization equipment. At least one switching circuit is connected in series between the power source and that portion of the utilization equipment. The switching circuit is responsive to the temporary interruption of power to open the circuit between the power source and that portion of the utilization equipment and to maintain that circuit open after the temporary interruption of power ceases, thereby automatically deenergizing that portion of the utilization equipment upon interruption of the power.
Abstract: The invention relates to a high voltage electromagnetic pulse generator.This generator comprises a capacitor having an axis of revolution, disposed about an internal conductor and charged by means of a high voltage direct current power supply, a conical spark gap, whose axis of revolution coincides with that of the capacitor, having first and second electrodes and used for discharging the capacitor, a ballast resistor having an axis of revolution, connected in series with the spark gap in such a way that the first electrode is connected to the high voltage terminal of the power supply and the second electrode to the earth of said power supply via the ballast resistor and the internal conductor and electromagnetic control means for the spark gap, the capacitor, spark gap and ballest resistor forming with the internal conductor a coaxial line having a constant impedance along the line.
Abstract: An electronic door locking system for an automotive vehicle with which vehicle doors can be locked, by depressing a proper push-button type switch representative of a predetermined door-locking octal digit, only when an ignition key is not left in the ignition keyhole. Therefore, it is possible to lock vehicle doors without leaving the ignition key in the keyhole, with the result that the vehicle can be prevented from being stolen by a thief when parked. The electronic door locking system according to present invention includes a device for detecting the presence of the ignition key left in the ignition keyhole and outputting a signal to inhibit a door-locking command signal from being applied to a door lock actuating solenoid, in addition to the conventional electronic door locking system.
Abstract: The power supply system comprises three levels: a primary level (PRI), a secondary level (SEC), and a tertiary level (TER). The secondary level is constituted by power supply circuits (S1 to Sn) which provide galvanic isolation between the primary and the tertiary levels, and which provide at least one intermediate voltage at a fixed level relative to a system reference potential (point R). The tertiary level comprises chopper power supplies (RD), converters (CV), and inverters (OND) connected to user equipment (UT).
July 9, 1982
Date of Patent:
January 17, 1984
Societe Anonyme dite: Compagnie Industrielle des Telecommunications Cit-Alcatel
Abstract: A non-impact recording method and apparatus capable of printing with electroconductive thermal-transferable ink on a receiving surface, with uniform image density and high resolution, and with minimum energy consumption, by embodying the steps of superimposing on a receiving surface of a recording sheet an ink ribbon comprising an electroconductive thermal-transferable ink material; placing a recording electrode having a plurality of recording styli in contact with the ink ribbon, and a return electrode in contact with the ink ribbon, the return electrode disposed at a predetermined distance from the recording electrode, substantially parallel to the recording electrode, with the contact areas with the ink ribbon of the recording electrode being smaller than the contact area with the ink ribbon of the return electrode, which predetermined distance is in the range of 2.times.d.ltoreq.Lm.ltoreq.200.times.
Abstract: A high frequency switching circuit comprised of a single-ended switching circuit, rectifying-smoothing circuit and magnetic amplifier which is connected between said single-ended switching circuit and rectifying-smoothing circuit. The magnetic amplifier includes a saturable reactor which has a coercive force Hc of 0.6 Oe or above and a rectangular ratio Br/Bs of 80% or below at an operating frequency of 20 kHz. The saturable reactor is prepared from an amorphous magnetic alloy having a composition of(Co.sub.1-a-b-c Fe.sub.a Ni.sub.b M.sub.c).sub.1-d X.sub.dwhere:M=one element selected from a group consisting of the elements of Nb, Cr, Mo, V, Ta, Ti, Zr and WX=B or a compound of B and Si in which the content of Si is set at 25 atomic % or less0.04.ltoreq.a.ltoreq.0.150.ltoreq.b.ltoreq.0.100.005.ltoreq.c.ltoreq.0.100.15.ltoreq.d.ltoreq.0.30.
Abstract: Electrothermic non-impact recording method and apparatus capable of printing with electroconductive thermal-transferable ink on a recording medium by reciprocating a recording head relative to the recording medium, which recording head comprises (i) a plurality of recording styli and (ii) a return electrode in contact with an electroconductive ink ribbon comprising a thermal-transferable ink material, the ink ribbon being in contact with a receiving surface of a recording medium; by applying between selected recording styli and the return electrode an image-delineating electric current, through resistor elements, each of which is connected between each of the recording styli and each of the output terminals from which the image-delineating electric current is output, the resistance of each resistor element being in the range of 1/10 to 10 times the resistance of the portion of the ink ribbon between each recording stylus and the return electrode, thus causing the image-delineating electric current to flow thr
Abstract: Not only an image signal of a scene of performance of musical instruments and a sound signal of such performance, but also the performance data of a specific musical instrument are recorded by a video system, and by virtue of a reproduction of this record, the image signal, the sound signal and the performance data are separated from each other. Thus, not only the image from the image signal and the electronically reproduced sound from the sound signal, but also a real automatic playing musical instrument such as player piano corresponding to said specific musical instrument is actually driven to effect a performance, whereby the watcher-listener is also able to listen to the performance sound of a real musical instrument.
Abstract: There is disclosed an electro-mechanical sequencer to equalize the running time of multiple (typically four) pumps in a common sump at a sewage treatment plant or the like. The sequencer includes a solid state binary counter receiving an input at an all-pumps-off condition. The binary counter operates a pair of multi-pole-double-throw relays. Control signals (typically four) from float valves or other sensing devices to the pump motors are routed through the first relay and then the second relay; one of the relays shifts the connection of its inputs and outputs by one position; the other relay shifts by two positions. Upon successive input signals to the binary counter the relays are changed from no-shift, to one position shift, two position shift, three position shift, and back to no-shift (in four pump systems). Three pump systems return to no-shift after the two position shift.