Abstract: An electrophotographic apparatus for printing or forming at least one copy of a manuscript comprising a manuscript feed mechanism including upper and lower side feed mechanisms arranged above and below a rectilinear manuscript feed path including a slit light exposure portion at which a manuscript image is projected onto a photosensitive drum, said upper side feed mechanism being movable with respect to said slit light exposure portion to define thin and thick manuscript feed paths, respectively. A thick manuscript feed mechanism is provided in the lower side feed mechanism for feeding a thick manuscript carriage made of transparent plate. The apparatus further comprises a first movable edge guide for positioning an edge of a sheet manuscript and a second fixedly arranged guide for positioning the edge of the thick manuscript carriage. The first guide is preferably positioned inwardly with respect to the second guide viewed in a widthwise direction of the manuscript.

Abstract: A circuit comprising a line interruption arrangement for producing dial pulses, comprising a series arrangement of a semiconductor switching element and a control device connected between a first and a second line terminal, the first and second terminals being provided to enable connection to a subscriber's line. To limit the current in the subscriber's line while using a minimum of components, the control circuit comprises a current detection device which is connected to the control electrode of the semiconductor switching element to drive the semiconductor switching element into saturation when the line current is below a predetermined value and to drive the semiconductor switching element out of saturation when the line current is above the said predetermined value.

Abstract: A three-phase power factor control system for an AC induction motor (10) monitors the power factor of a first-phase motor winding and produces a rectangular-wave pulse power-factor signal (f) which is used to directly control the duration of "on" time of each cycle of input power to the first-phase winding and to indirectly control the "on" time of each cycle of input power to second- and third-phase windings. To provide a signal for controlling the power to second- and third-phase windings the power-factor pulse signal is synchronized with a square-wave oscillator (30) whose frequency is three times that the power-factor pulse signal. Each second and third positive pulse (38 and 40) of the square-wave oscillator (30) is used to control the "on" time of each cycle of input power to the second- and third-phase windings.

Abstract: A carbon transmitter utilizes an electrode prepared by in situ reaction between substrate copper and introduced sulfur. Good surface adhesion between the resulting CuS layer and the substrate is assured by use of a two-phase cobalt/copper substrate.

Abstract: The connecting device according to the present invention comprises for a two wire to four wire converter which connects the reception channel of a private network to the public network via an amplifier, whose symmetrical outputs are connected to the public network by capacitors, the gain loss due to these capacitors being compensated by a second amplifier. For the transmission channel a third amplifier has inputs connected to the public network by capacitors and an output connected to one input of a fourth amplifier, whose other input is connected by a phase shifting network to the reception channel.

Abstract: A system for processing analog electrical input signals to produce output signals having frequencies determined by electrical adapting signals, in which the adapting signals may depend upon characteristics of the input signals.

Abstract: A method of harmonizing the impedances of an audio amplifier and a loudspeaker interconnected therewith, the audio amplifier including a line amplifier and a positive feedback circuit for compensating for the counter electromotive force of the loudspeaker. A voice coil of the loudspeaker is mechanically driven for generating an electric signal at input terminals of the loudspeaker. Then, the amplification degree of the line amplifier or the positive feedback circuit is adjusted to reduce the signal voltage between the input terminals of the loudespeaker to a minimum, during the circulation of the generated signal through the positive feedback circuit and the line amplifier.

Abstract: A speaker in which a voice coil bobbin (4) is connected through a mechanical filter to vibrating members (11, 14) for limiting the reproducing frequency band in predetermined range by the mechanical filter, and a speaker system employing the speaker. A pneumatic suspension V is used as the mechanical filter to eliminate the variations in the reproducing frequency band even for long term usage.

Abstract: The present invention is a programmed clutch for controlling the acceleration of a scanning carriage at scan return (flyback). An encoder including an electro-optic sensor mounted on a moving carriage together with a stationary grating having a plurality of unevenly spaced apertures, provides velocity data of the rate of the relative movement of the sensor and grating during acceleration. In particular, the sensor detects light through each of the apertures as the sensor moves relative to the grating. The light signal time is conveyed to a counter and the time is compared to a reference number representing an acceleration profile or standard number of signals desired for each aperture. If the number of light signals is more than the standard, occurring if the carriage is underspeed, a transistor driver is pulsed to activate an electromagnetic clutch connected to the scanning carriage. When the scanning carriage velocity has increased sufficiently, the clutch is inactivated.

Abstract: A method and apparatus for electrical transmission, wherein an electric current is applied to the primary winding of a mains transformer the secondary winding of which consists of at least one spiral, and a corresponding electric current is collected at the secondary winding of at least one distribution transformer, the primary winding of which consists of said spiral, while the secondary winding of the distribution transformer is mounted in a removable member.

Abstract: Circuitry (100) for providing impedance compensation between a source impedance (501) and a load impedance (505) which is proportional to the source impedance comprises: a pair of directional couplers (200 and 300), each coupler including bidirectional transmitting and receiving paths and a unidirectional path coupling these paths; means (121) for cascading the transmit path of one coupler to the receive path of the other; and unidirectional amplifier (400) for interconnecting the remaining bidirectional transmission ports. The impedance match to the source is obtained by adjusting the amplifier gain in correspondence to the number of essentially identical terminations that are bridged to form the load impedance. Means (510-515) sense the number of active terminations and transmit this information to the amplifier so the appropriate gain setting may be established.

Abstract: This arrangement comprises a controllable attenuation circuit of the voice signal received, a pulse-duration modulator which produces pulses the duration of which is modulated by the voice signal supplied by the controllable attenuation circuit, an overshoot detection circuit which produces from the modulated pulses a compression pulse each time it is detected that the amplitude of the modulated voice signal reaches a certain threshold, the compression signal produced by the said overshoot detection circuit being applied in the attenuation circuit to an integrating circuit which produces the attenuation control signal. The amplifier of the loudspeaker receives the modulated signal.

Abstract: An automatic controller for a film processor is characterized by a motor energy signal generator which is responsive to both a position error signal and to a velocity error signal. The motor energy signal is periodically applied to a drive motor for the processor to modify the portion of the available energy transmitted from a source to the motor to restore the actual film position to within a predetermined range of an ideal film position and to restore the actual velocity of the film to within a predetermined range of an ideal film velocity.

Abstract: A volume control system includes means responsive to a single push button for reversing the direction of volume level change for each alternate depression of the push button. Specifically, for a first depression of the push button, the volume is continuously increased so long as the push button is held down. For a second depression of the push button, the volume is continuously decreased so long as the push button is held down. The disclosed system saves the cost of an additional push button while providing an easy-to-use system for volume level adjustment.

Abstract: In a multifrequency receiver, a threshold level (VTH) supplied to a group of threshold comparators (105-1 through 105-N) is controllably adjustable by a variable threshold generation circuit (104) in response to received multifrequency signals. As the envelope of the received multifrequency signal experiences a positive amplitude transition, the threshold level is increased at a fast rate (fast attack). Also, as the envelope of the received multifrequency signal exhibits a negative amplitude transition, the threshold level is decreased at a much slower rate (slow release).

Abstract: An image information recording device having a pair of image fixing rollers which hold a toner image bearing member between them under pressure to fix a toner image thereon during conveyance of the same, a toner-image-bearing-member-discharging-path-forming device disposed at a position subsequent to the pair of image fixing rollers with respect to a moving path of the toner image bearing member, a disengaging device to disengage, depending on necessity, the discharging path formation by the toner-image-bearing-member-discharging-path-forming device, and a device for decreasing a pressure between the pair of fixing rollers or separating the same in association with the disengagement of the discharging path formation.

Abstract: A method of driving a valve in an injector for an internal combustion engine which intermittently injects liquid fuel by the valve reciprocally moving by attraction force of a solenoid coil and repulsive force of a spring and an apparatus for carrying out the method. An armature secured to the valve to be attracted by the solenoid coil and/or an iron core of the solenoid coil is made of a permanent magnet. The pulse shape of an electric current to be applied to the solenoid coil is made in the form of a stepped wave in which the electric power in the initial stage of application is larger than that in the later stage. An inverse pulse for inversely exciting the solenoid coil is formed to give the permanent magnet of the armature repulsive force upon fall of the pulse wave of the electric current applied to the solenoid coil.

Abstract: A reflex horn speaker with a waterproofing device for use on a ship or the like is disclosed. The reflex horn speaker comprising a sound generator, an inner cylindrical horn, a conical reflector concentrically arranged around the inner horn, and an outer cylindrical horn concentrically arranged around the reflector, is provided with a waterproofing device such as a valve, mounted to the closed front end of the reflector, which can open or close the front opening of the inner horn in order to prevent water and/or moisture from coming in the inner horn when it is not used.

Abstract: An expandable telephone housing has been developed which allows for easy lateral expansion. The housing contains front and rear slides and an end cap which is removable. For expansion the end cap is removed exposing a mating mechanism for locking to an expansion housing. The expansion housing contains a face plate having additional lamps or buttons. New, and longer, front and rear slides are positioned along the front and rear edges of the combined housing to secure the now elongated structure. When assembled, the combined housings give the appearance of a single housing. The rear slide may be arranged for securing an auxiliary display unit.

Abstract: An adaptive echo canceller for two-wire, simultaneous two-way data communication at full bandwidth uses Nyquist-interval, rather than baud-interval, processing to achieve independence from timing discrepancies between near-end and far-end terminals. The entire echo signal, and not merely baud-interval samples thereof, is suppressed. The echo canceller is preferably a transversal structure.