Abstract: A toner powder transport system provides continual magnetic controlled movement of magnetically attractable toner powder from a toner reservoir to an imaging styli array plus return of unused toner powder to the toner reservoir. A nonrotatable cylindrical member carries the imaging styli array. A rotating magnetic means within the nonrotatable cylinder causes toner brought to the nonrotatable cylinder to move around the nonrotatable cylinder and over the styli array. A magnetic transport means is disposed between the toner reservoir and the nonrotatable cylinder for bringing toner powder from the toner reservoir for magnetic transfer to the nonrotatable cylinder and magnetically removes unused toner powder from the nonrotatable cylinder for return by the magnetic transport means to the toner reservoir.

Abstract: Circuitry controlled by a series of switch actuations per a preselected switch code provides a control signal. A plurality of flip-flop circuits are connected for series operation. A plurality of switches in excess of the number of digits in the code are available to provide an actuating signal for a flip-flop circuit. A time delay provided between successive flip-flop circuits enables a given switch to be used more than once for a switch code. Automatic resetting of the last flip-flop circuit at which the control signal is provided allows the control signal to be repeated one or more times before all of the flip-flop circuits are reset. A time delay circuit at the first flip-flop circuit provides for automatic reset of the circuitry. Each switch not connected to a flip-flop circuit as a digit of the switch code will, when actuated, reset the circuitry.

Abstract: Improved switching circuitry for use in connecting a remote control signal circuit to an electrically powered circuit wherein power for the remote control signal circuit is provided by the electrically powered circuit. Power metal-oxide-semiconductor field-effect transistors (MOS-FETs) are connected to a control signal output of the control signal circuit and provide the function of at least one diode of a full-wave rectifier bridge in the switching circuitry. The MOS-FETs respond to a logic 1 control signal to establish a low impedance path across the output of the full-wave rectifier that is connected to the electrically powered circuit.

Abstract: An electrographic method and apparatus are provided for maintaining a controlled quantity of electronically conductive toner in the recording region formed between an array of stylus electrodes and a receptor recording member. A regular or relatively uniform supply of toner is provided to said recording region where a temporally constant force is presented which acts on the toner to establish an electronically conductive path via the toner between the electrodes and the recording member. Recording electrical potential signals selectively applied to the first electrodes relative to the recording member cause toner to be deposited on the recording member as image toner. A toner removal means provides a temporally constant force for removing excess accumulated toner from said recording gap to a point where it is out of electronic contact with the toner at the recording gap. Non-image toner removal means positioned at a point remote from the recording region is also disclosed.

Abstract: Apparatus to apply offset preventing liquid to a fixing roller. A web member is moved from a supply core to a take-up core via a pressure roller positioned to establish a contact nip for the web member with the fixing roller. The web member is supplied with the liquid from an offset preventing liquid applicator positioned to contact the web member between the supply core and the contact nip on the surface of the web member that is brought into contact with the fixing roller.

Abstract: Liquid level sensing circuitry useable for detecting the presence of an acceptable or unacceptable level for a liquid, such as engine oil. Prior to termination of the operation of the engine, the circuitry presents an unacceptable level indication at a control point. After completion of a time delay following termination of engine operation, an acceptable level must be presented for a time to cause an acceptable level indication at the control point which is maintained pending initiation of engine operation. Upon initiation of engine operation a first discernible indication is provided for a time period if the control point presents an unacceptable level indication with a second discernible indication provided for such time period if the control point presents an acceptable level indication.

Abstract: Tone detection circuitry including tone decoder providing a free running frequency determined by timing resistance and timing capacitance connected to it. A control means including a programmable microprocessor establishes a retrieval record based on the product of the timing resistance and timing capacitance needed to establish the center frequency of the tone decoder for a plurality of bandwidths. The retrieval record is used to establish the product of the timing resistance and timing capacitance when a tone within the selected bandwidth is to be detected.

Abstract: A liquid level sensing circuitry using a conductive probe to sense and store an acceptable or unacceptable level signal. Any unacceptable level signal is stored a short time, determined by the circuitry, following termination of power to a power conductor. The circuitry provides a discernible indication of an unacceptable level when power is subsequently applied to the power conductor if an unacceptable level signal has been stored. A separate discernible signal is provided at such time if an acceptable level signal was stored.

Abstract: A drum-type transceiver facsimile machine having a plurality of light-to-electric transducers and a plurality of printing styli moved axially of the drum for scan/print operation. Shift register means and a buffer memory controlled by a programmed microprocessor provide for multiplexing of signals from the transducers having a scan operation and demultiplexing of signals during the print mode with use of a buffer memory permitting compression of the multiplexed signals and decompression of received signals prior to demultiplexing.

Abstract: Liquid level sensing circuitry provides storage of a signal upon operation of a switch. The signal stored is dependent on whether a probe is in contact with the liquid sensed. Provision is made to prevent storage of a different signal for a period of time should the switch be operated more than once during such period of time. A different discernible indication is produced for each stored signal.

Abstract: A system and method using an integral sandwich structure including an insulative layer-photoconductive layer-conductive layer. A removable electrode member is positioned above and connected to the insulative layer by a thin liquid layer having a dipole moment greater than zero, a conductivity sufficient to maintain the electric potential of the surface of the insulative layer at the potential of the electrode member, a surface tension equal to or smaller than the critical surface tension of the insulative layer. Upon removal of the electrode member the liquid evaporates in a time period less than the dark dielectric time constant of the photoconductive insulative layer. A d.c. voltage is applied between the conductive layer and the removable electrode during which time a radiation image is applied to the photoconductive layer to cause an electrical charge image to be produced at the outer surface of the insulative layer.

Abstract: System and method for locating resistive faults and interconnect errors between the conductors of a cable such as a telephone cable. An alternating magnetic field is applied to the cable at successive points along the same and the signal produced by the induced voltage is monitored at one end of the cable. With a resistive fault or an interconnect error, the signal at the end of the cable is discernibly greater when the magnetic field is applied between the sensor and the fault than when the field is applied beyond the fault. In either case, the location of the fault is indicated by the change in the sensor signal as the field is applied at points on opposite sides of the fault. The signal information is communicated to the person who is applying the magnetic field to the cable for use by him in locating the fault.

Abstract: Means for checking the voltage level of a battery used in an apparatus including an operational amplifier powered from the battery and an indicating means operatively connected to the output of the operational amplifier. The indicating means provides a replace battery indication which is presented when the battery is in a replacement condition and the amplifier is operated at saturation.

Abstract: A composite dual layered photoreceptor member useful in the field of electrostatic electrophotography. The photoreceptor has a support member with a bulk layer on the support member of vitreous selenium-tellurium composition and a thin overlayer of vitreous arsenic-selenium composition. The selenium-tellurium can, if desired, be doped with a halogen.

Abstract: Apparatus for providing an electrical signal when developer material for a copy machine recedes to predetermined level in a container for the material. The apparatus is positioned within the container and includes a light generating means directing light to a light to electric transducer. A cleaning member carried by a rotating arm is included which with rotation of the arm displaces any developer material that is present between the light generating means and the transducer means.

Abstract: A bi-directional subscan drive control for a drum-type facsimile machine utilizing a single, bi-directional, electrically controlled stepping motor for driving the scan head of the facsimile machine in one direction at any of a plurality of possible rates during a scanning operation and for driving the scan head in the opposite direction at a much higher rate upon completion of the scanning operation. The stepping motor is operated to provide at last two steps for each revolution of the drum when operated in the one direction.

Abstract: A D.C. power supply energized directly from an A.C. source including a voltage doubler circuit supplied with current from the A.C. source via a gate controlled bidirectional switch with the gate circuit for the bidirectional switch connected for control by a disabling switch means. The disabling switch means is controlled by a voltage level sensing circuit that senses the output voltage of the voltage doubler circuit to cause operation of the disabling switch means to disable the gate circuit for the bidirectional switch when a predetermined voltage level is sensed by the sensing circuit.

Abstract: A leaded mounting and connector unit for an electronic device wherein the unit includes a structure having two parallel sides and a plurality of metallized areas which connect with spaced metallized areas provided at the parallel sides to which terminal leads are bonded. Grooves provided in the two sides receive the terminal leads which, in some cases, can extend beyond the sides serving to locate a cover or locate and connect with a leadless structure positioned above the leaded unit. The terminal leads are provided with tab members for locating the leads relative to the structure and to locate a leadless structure at a position above the leaded unit.

Abstract: Apparatus and control circuitry used in a copy machine for providing copy paper cut to length in accordance with an original sheet sensed by a single switch in the path of travel of the original. A first feed roller is rotated via a clutch upon energization of a solenoid for the clutch when the leading edge of the original is sensed by the switch to connect the solenoid to a D.C. power supply via a capacitor. When the capacitor is nearly charged, current flow to the solenoid has diminished to a level where the armature of the solenoid is returned to its unactuated position. The leading edge of the copy paper is moved from a solenoid operated cutter to a second feed roller by the rotation provided by the first feed roll in response to the energization of the solenoid for the clutch.

Abstract: Circuitry is disclosed for transmitting clock signal information with a transmitted signal. The transmitted signal is obtained by applying non-return to zero input pulse signals, provided at one-half the frequency of the clock signal, with alternate "1" logic and "0" logic signals, which are coincident with the transitions in the pulse signals, to an exclusive-or logic circuit and combining the output of the exclusive-or logic circuit with the alternate "1" and "0" logic signals at an adder circuit. The adder circuit provides an output that is a succession of signals at one-half the frequency of the clock signal with each of the successive signals having an amplitude different than the amplitude of the preceding signal. The logic signals provided to the adder circuit have an amplitude equal to or greater than the output of the exclusive-or logic circuit. Circuitry is also disclosed for recovering the clock information from the signal provided from the adder and for reconstructing the input pulse signals.