Abstract: A method of electrically transferring an image deposit formed of liquid dispersed electroscopic toner particles from an image-bearing photoconductor surface of a recording member to the surface of an image-receiving member in which an electrical transfer bias voltage is applied through the interface between the said surfaces in a direction normal to the said surfaces, and in which the said electrical transfer bias voltage is applied intermittently by successive pulses of opposite polarity and with successively increasing voltage, with the final pulse of an electrical polarity and magnitude to transfer the said imaging material to the said receiving member.

Abstract: A removable cartridge like toning device for electrophotographic imaging apparatus of the type wherein a latent electrostatic image formed on an endless electrophotographic belt is translated past a toning station for rendering the latent image visible. The toning device described is a box-like container for liquid toner having an elongate longitudinal slot formed in the top wall and a feed roller seated for rotation within said container, a portion of the circumferential outer surface of the roller extending from the slot. The side walls of the container are provided with inclined flanges cooperating with conformingly inclined ramps provided in the imaging apparatus at the toning station so that the container is guided to a position closely spaced substantially parallel to the electrophotographic belt.

Abstract: A method and apparatus for igniting a microwave generated discharge lamp. An ultraviolet-producing means is positioned so as to irradiate the fill-containing envelope of the discharge lamp. The ultraviolet-producing means is excited by microwave energy which is extracted from means which couples microwave energy from the microwave source to the fill-containing envelope of the discharge lamp.

Abstract: An electrophotographic color proofing apparatus is provided including a copyboard carrying a color separated positive and capable of being positioned into intimate contact with a charged photoconductive coating of an electrophotographic member. The engaged members are exposed to light, discharging the coating in increments to form a latent electrostatic image thereon. The copyboard is withdrawn and the exposed electrophotographic member rotated 180 degrees facing toward a toning assembly consisting of a row of plural toning units, each carrying a different color toner and arranged in line for linear translation below the exposed electrophotographic member with a selected one toning unit thereof being activated to apply a selected color toner to the latent electrostatic image. The toned member again is revolved 180 degrees.

Abstract: A liquid displacement device which utilizes an internal unit assembly type construction wherein the internal unit assembly can be installed in or removed from a cavity in the housing of the device as a unit. The internal unit assembly includes a pair of meshed gears, which are rotatably supported by a pair of axially spaced end plates disposed on opposite sides of the gears. The internal unit assembly also includes at least one pair of thrust members and at least one corresponding pair of axial pressure loading chambers which bias the thrust members in a direction to counterbalance the axial components of the pressure force at the discharge side of housing that tends to separate the end plates from predetermined positions with respect to the side faces of the gears.

Abstract: Method and device for detecting the presence or the absence of conductive indicia carried by a supporting substrate which together comprise a security document, for the purpose of ascertaining the genuineness, value or other selected characteristic represented by said indicia. The indicia material is electrically conductive. The detecting device includes a housing and a sensing circuit including a source of high frequency a.c. alternating signals, first and second electrodes and the a.c. source coupled thereto.A carrier for the document is arranged in proximity to said electrodes. The questioned document is placed in the vicinity of the electrodes whereby the presence of the conductive encoding indicia serves as a coupling mechanism between the electrodes for capacitively inducing a secondary a.c. signal from the first electrodes to the second which is different from the first mentioned a.c. signal, said secondary signal being of a selected measured magnitude representative of said presence and of encoding.

Abstract: A shading corrector is provided for an image analyzer. The shading corrector is capable of storing an image presented to a raster scanning television camera included in the overall system. A memory is used to store camera video voltage variations which are representative of an object-free background field. When specimens are subsequently introduced into the field of view, the resulting video voltage may be compared in a voltage comparator to the stored background reference. A circuit is provided to correct the stored background and provision is made for using the background of a juxtaposed position in the event that the background used for the correction is covered by an object. The system is also provided with a light pen or equivalent device for identifying positions in the raster at which modifications are desired. Provision is then made for correcting images at these selected positions such as by adding to or subtracting from the images.

Abstract: A magnetic tape apparatus is disclosed herein and comprises a drum, means for supporting and rotating the drum, at least one transducer extending past the surface of said drum adapted to rotate therewith in a given plane, and means for presenting tape to said drum with its longitudinal axis parallel to said plane. Means are also provided adjacent the transducer for venting air from the air cushion between the rotating drum and the tape at the region of the transducer to bring the tape closer to the face of the transducer and at least one groove formed on the face of the transducer is used for venting air from the cushion between the transducer and tape.

Abstract: A machine and method for subdividing into individual substrates a wafer which is prescored with a pattern of intersecting score lines defining the substrates. The wafer is progressively directed over a first wafer-engaging surface substantially paralleling one set of score lines, and this surface operates during a breaking operation to impart a localized force at a score line in the set. The wafer is halted for the breaking operation, after which the broken-off portion is directed over a second wafer-engaging surface substantially paralleling the other set of score lines. This second surface operates, during a substrate breaking operation, to apply a localized force adjacent a score line of the other set. The broken-off portion is also halted for this second breaking operation, in which an individual substrate is separated from the previously broken-off portion of the wafer. An inclined track transports the material from the first to the second breaking operation.

Abstract: A furnace wall lining is formed of ceramic fiber modules or batts arranged in stacks or layers between more rigid layers of insulating material to which are connected hangers for supporting electrical resistance heating elements. The more rigid insulating layers are preferably a dense fiber board insulating material having openings into which may be hooked one end of an elongated hanger which lies in a groove across the top face of the rigid insulating layer. An end of the hanger projects inwardly into the furnace chamber from the inner face of the furnace lining and supports the heating element. The rigid layers may be used to compress a stack of soft wall batts therebetween.

Abstract: The flat belt tire tester which permits mounting a wheel and tire to be tested about an axis positioned above a flat belt, and has framework and controls for lowering the tire into contact with the belt under desired loads, using desired adjustments for camber and steering. The belt is powered, and can thus be used for testing the tire under simulated road conditions. The mounting framework and belt mounting construction of the present invention provides substantial rigidity through having the mounting frame geometry properly oriented in relation to the contact surface of the belt and also by providing a stiff frame for the belt mounting drums or pulleys.

Abstract: Disclosed herein is a developer with a flowable coated carrier for use in electrophotographic recordings. The carrier is coated with a solution formed by reacting a polyfunctional polyisocyanate with hydroxy containing polymers in the presence of a catalyst. The reaction occurs with a range of 1.4 to 1.55 parts polyfunctional polyisocyanate to one part of the hydroxy containing polymer. A fluid bed process is used to coat the carrier by cycling the carrier material thru a spray of the solution until a desired coating thickness is achieved and then the material is heat cured. The carrier is coated with an alipathic aeromatic cross-linked resin having a longer useful life and better triboelectric stability.

Abstract: A bi-directional data transmission and control system utilizing a central processing unit and a multiplicity of remote subscribers. Each subscriber is provided with a terminal coupled with the central processing unit by a suitable medium such as a CATV channel. Each terminal is provided with a demarcation plane separating common circuitry from a number of specialty modules and a common bus therebetween for circuitry simplification, application expandability and individual tailoring. The data transmission scheme efficiently utilizes the frequency spectrum and enhances polling frequency by permitting selective polling of any given specialty module or subscriber at any given time and by permitting simultaneous polling of every subscriber for service calls, thereafter locating the caller with minimal polling. Data transmission protocol is expandable or contractable for each terminal independently of others and permits data transmission between any two points in the system.

Abstract: A cassette or cartridge-loading tape transport is disclosed, for use in magnetic recorders and the like, especially data recorders. The device includes tracks for slidably receiving a cassette or cartridge. A plate is slidably supported below the tracks and a drive motor is mounted on the plate. A constant-force spring biases the plate to a forward position. A plurality of lever arms supporting rollers are pivotally mounted adjacent the plate. Each lever arm includes a cam surface cooperating with a cam surface on the plate so that the rollers on the arms are moved from a lowered, inoperative position to a raised position engaging, locating and locking the cassette or cartridge within the recorder. A constant-force spring biases the lever arms to a raised position.

Abstract: A transient-free, high accuracy digital-to-analog converter is disclosed having a resistor network which generates a plurality of equally weighted currents selectively switched to an output bus to provide an output corresponding to the input code, in which a binary input code is decoded into a specialized code such that an incremental increase in the input code causes an additional one of the equally weighted currents to be coupled to the output bus.

Abstract: A light scanning assembly for apparatus including a copyboard, an optical train and a carriage carrying charging, exposure and toning devices. The copyboard is movable from a horizontal disposition to a vertical disposition at which it is scanned in synchronism with simultaneous movement of the carriage horizontally. The light scanning assembly comprises a support bracket mounting a pair of illuminating lamps disposed each with an associated elliptically configured reflector. The support bracket is driven translating the lamp pair and their common intersection band across the face of the copyboard synchronously with the movement of the carriage. A third lamp is mounted (with reflector) on a second bracket to illuminate through the copyboard and is movable vertically with the first bracket. The third lamp is energized only when a transparent document is carried by the copyboard. The first pair of lamps are not energized at that occasion.

Abstract: An adjustable sensor for detecting marks or "blips" on a strip of microfilm. The sensor includes a pair of individually adjustable sensing modules separately adjustably mounted on a mounting plate. Preferably the modules are magnetically mounted to the plate. Each sensing module includes magnet means and an electronic circuit encapsulated within a housing and an arm for adjusting the position of the housing on the mounting plate. A detector, preferably a fiber optic wand, is connected to the electronic circuit and partially encapsulated within the housing. The fiber optic wand extends outwardly of the housing to detect the blips on the microfilm.

Abstract: A linearization circuit for use with servovalves for controlling reciprocating actuators. The circuit will maintain a substantially linear flow as a function of spool position from the servovalve regardless of the differential pressure across the servovalve orifices, for example the differential pressures which result from changing direction of movement of the controlled actuator under a high load. A differential pressure signal from the actuator, which correlates to differential pressure on the servovalve orifices is processed to provide a compensation signal combined with the normal control signal to achieve the desired output.

Abstract: A prefabricated building of symmetrical polygonal shape secured onto a concrete slab and symmetrical about a vertical central axis, the building having vertical columns in each polygonal corner and the columns being joined by perimeter beams extending therearound parallel to the slab to form a substantially closed main framework. The building further includes roof beams supported entirely by the columns and extending diagonally upwardly and inwardly to an apex member which joins them. The columns have connectors attached to them to receive the ends of the perimeter and roof beams which comprise two C-shaped members disposed back-to-back with their webs slightly spaced by internally mounted spacers. Prefabricated side and roof panel members enclose the framework, and are made thick enough to hide the beams and the columns and to lap each other to form an inclosed structure.

Abstract: A packaging scheme for an expandable electronic system or sub-system unit which minimizes cabinet interconnection structure whereby electrical signal connections are bifurcated and may be made to and from electronic component carrying printed circuit boards, whereof, inter-board connections may be made off of one edge of each board while input/output interface connections may be made off of another edge of each board.