Abstract: A plotting head for use in a drawing machine comprising a housing attached to said drawing machine; a lead holding means installed for vertical movement within said housing and having a vertical through hole; a bias means disposed above said lead holding means and imparting it a continuous descending tendency; a long cover means covering said bias means; a chuck means disposed for vertical movement in the through hole of said lead holding means, provided with a vertical lead inserting hole and having at the lower part a collet portion arranged to shut for clamping the lead and open for releasing the lead depending upon the vertical movement of said chuck means; a gripping means disposed for vertical movement on the bottom wall of said housing and operating to grip the top of the lead; and an actuating means operating to allow said lead holding means to ascend against the force of said bias means.

Abstract: A thermal recording stylus comprised of a ceramic tip with two passages from openings near a frustum-shaped end to openings at the rear, an electrical heating element wrapped around the frustum-shaped end from one opening thereof to the other, and electrical power leads extending from the ends of the heating element through the passages. The leads and heating element are secured with cement in the passages, and the entire assembly is secured in a sleeve with cement and a ring wedged between a conical section of the ceramic tip and the sleeve.

Abstract: The invention relates to a bar for printing an image. It comprises a stack of conductive plates which are insulated from one another in which one end of each forms a printing stylus and n diagonal matrices for addressing the styli whose columns are constituted by plates and are fed via resistors formed on the plates and whose rows common to the n matrices are constituted by electric conductors connected to the columns via diodes which are also formed on the plates.

Abstract: An electronic stencil cutter having a rotatable drum with an original subject sheet and a stencil sheet mounted side by side thereon. Scanning and stencil cutting heads are mounted on a common carriage for simultaneous movement along the original and stencil sheets. The original subject sheet is retained in a holder consisting of a flexible, transparent sheet wrapped about the drum, one end of the retainer sheet being held releasably against the drum by a pressure-sensitive adhesive strip. The ends of the stencil sheet are held by an elongated clamp bar in a slot in the drum, the clamp bar being urged outwardly by springs and manually releasable by latch members at the ends of the bar. The stencil cutting head has a plastic stylus which is deflectible by a solenoid to press a wire electrode against the stencil sheet while cutting the stencil. The solenoid has a soft, felt-like nose which engages the stylus to dampen vibration of the electrode.

Abstract: Disposable instrument pen with integrally-formed spring member simplifies installation and provides its own biasing means for urging the pen nib into engagement with a writing surface and/or for retaining the pen in a pen mounting carriage. In various alternative embodiments, the spring member may consist of a cantilever arm, a torsion bar with end mount fixtures, a helical spring, flared wings, etc.

Abstract: Guide for electrodes in a metal paper printer in which V-shaped grooves are formed in monocrystalline silicon by crystallographic etching and the guide is thereafter coated with a glass passivation layer.

Abstract: A thermal pen of thick film type comprises a thermal pen tip and a thermal pen tip holder connected to the thermal pen tip for holding the thermal pen tip. The thermal pen tip comprises a high resistance substrate formed in the form of a pen point, a heater element formed in the form of a thick film on the end of the pen point of the high resistance substrate and an electric conductor formed in the form of a thick film so as to connect to the heater element. The thermal pen tip is preferably provided with a heat-resistant protective coating to cover the end of the pen point. A heat- and wear-resistant heat-sensitive recording piece is preferably provided in a heat conductive relation to said heater element.

Abstract: An electrically heated recording indicator is designed for use in a recording instrument or the like utilizing a thermosensitive recording medium. The recording indicator comprises an outer electrically conductive metallic tubular support member and an inner electrically insulating non-metallic tubular member positioned in the outer tubular support member. The outer tubular support member has an aperture adjacent one end thereof and the inner tubular member is arranged to extend across the aperture. Electrical resistance heating means is located within the inner tubular member. The heated inner tubular member directly contacts the thermosensitive recording medium through the aperture in the outer tubular support member to write on the thermosensitive recording medium.

Abstract: A multi-pin record electrode assembly comprises two series of record electrodes formed on the same substrate and folded to form a zigzag pattern with respect to each other. The electrodes are formed on a flexible substrate having a fold line separating the substrate into two substrate portions. Each substrate portion has an electrode set and its associated leads formed thereon. The substrate is folded along the fold line to produce the record electrode assembly.

Abstract: A frame carries a track. A voltage-applying circuit is carried by said frame and comprises a plurality of contact segments. An electrode holder is carried by said frame and in sliding contact with said track and movable relative to said circuit along said track between inoperative and operative positions. A plurality of leaf springs are carried by said electrode holder. Each of said leaf springs comprises a sliding contact portion protruding from said electrode holder and arranged to be in sliding contact with an associated one of said contact segments when said electrode holder is in said operative position. Each of said leaf springs comprises also a marking electrode portion protruding from said electrode holder and adapted to engage said metal coated paper when said electrode holder is in said operative position, and to be lifted from said paper when said electrode holder is in said inoperative position.

Abstract: The recording apparatus comprises a recording electrode and a drum disposed in close proximity with the recording electrode with a predetermined small clearance therebetween and is capable of forming image directly or latent electrostatic image on a recording sheet which passes through the clearance by applying signals corresponding to image information to be recorded on the recording sheet to said recording electrode. A pair of rotating members are supported swingably by the recording electrode on each of its opposite ends and in pressure contact with the peripheral surface of the drum under the weight of the recording electrode so that the clearance between the recording electrode and the drum is retained.

Abstract: An electric discharge printing device has the stylus formed as a conductive lamina with the stylus tip formed as the corner at which two edges of the lamina of the stylus intersect. The lamina is electrically energized to exert the appropriate electric discharge printing action on a copy sheet, such as a duplicating stencil to be cut electrically. The plane of the lamina is perpendicular to the copy sheet but parallel to the direction of relative motion between the stylus tip and the sheet, in use of the device.

Abstract: The present disclosure is directed to electrostatic recording devices wherein a latent electrostatic image is recorded on a dielectric coated sheet by a stylus array spaced apart from the sheet to form an ionization gap. There is now taught a means to accurately establish the distance between the recording stylus and the dielectric surface upon which the latent image is created. A dielectric sheet containing a conductive layer is passed over a fixed recording head containing an array of styli. The fixed recording head is provided with a source of fliuid which maintains positive pressure in a cavity with the recording head, which cavity has outlets facing the dielectric sheet passing over the head. The length of the gap between the dielectric sheet and the recording head is maintained by the fluid pressure emanating from the head.

Abstract: A recording head for use in a recording apparatus has a plurality of sets of recording electrodes corresponding to a plurality of line densities.

Abstract: A single pass multicolor thermal transfer printer for recording color images on plain paper by transferring spots of different colored materials from a carrier sheet as it and a sheet of paper are moved across a printhead in contiguous relation. The printhead includes a plurality of individual thermal elements that are selectively energized in timed relation to transfer colored materials from discrete areas of the carrier to the paper as the sheets pass over the printhead. The carrier includes separate, repeating patterns of four different color materials--three primary colors plus black--permitting the formation of multicolor images by energizing the appropriate elements as areas of the desired color materials are moved into registration with them.

Abstract: A thermal writing device for recording apparatus using heat-sensitive paper, in which the nib of the device is formed by a resistor having an electric resistance that is substantially dependent on temperature. An electric supply and control circuit directly supplies the resistor and controls its temperature so as to heat the stylus.

Abstract: A thermal recording stylus has a recording head made of Type IIa diamond. The type IIa diamond has a very good heat conductivity and an excellent abrasion-resistant property. Therefore, the thermal recording stylus with the recording head made of Type IIa diamond has an improved thermal response character, a higher resolution in drawing a line, and a longer life.

Abstract: Disposable instrument pen with integrally-formed spring member simplifies installation and provides its own biasing means for urging the pen nib into engagement with a writing surface and/or for retaining the pen in a pen mounting carriage. In various alternative embodiments, the spring member may consist of a cantilever arm, a torsion bar with end mount fixtures, a helical spring, flared wings, etc.

Abstract: An electrostatic printing apparatus having a transfer medium with a charge retentive surface for forming an electrostatic latent image, and a developer to develop the electrostatic latent image on the transfer medium for transfer to a support material. An array of printing electrodes supported by a flexible insulator abutting the transfer medium are uniformly spaced from the transfer medium.

Abstract: In a chart recorder where a print head is used to record data on a moving strip of chart paper, an improved apparatus for biasing the print head against the moving chart paper. The biasing apparatus provided includes a cantilevered leaf spring to maintain a constant and preset pressure between the print head and the moving chart paper. The distal or fixed end of the leaf spring is anchored to the frame of the chart recorder and the print head is mounted on the free end of the cantilevered leaf spring so that the leaf spring maintains a constant pressure between the print head and the moving chart paper. The cantilevered spring is adjustable to provide the desired amount of pressure between the print head and the moving chart paper. When a new roll of chart paper is inserted into the chart recorder, the cantilever spring re-establishes and maintains the pressure between the print head and the new roll of chart paper.

Abstract: In accordance with the present invention there is provided an electrographic recording apparatus for recording on an electrostatic charge retentive record medium and a driver circuit suitable for use therein. The apparatus comprises a plurality of recording electrodes mounted in close proximity to the record medium. A plurality of complementary electrodes are mounted in electrical cooperative relationship with the recording electrodes. Improved driver circuits are provided for applying a voltage to the electrodes. The driver comprises a current branch to which the electrode is connected. A current control is provided for supplying a current through the current branch, which current biases diodes to force the electrode to a reference potential. The current further charges an electrical storage element. To apply a high voltage to an electrode, the current control blocks the current flow. The potential stored in the storage element which causes a base-emitter current flow to forward bias the transistor.

Abstract: A particulate, resilient, electrically conductive member having a low thermal mass extends across the width of a conductive-backed recording paper and conducts electrical energy to the conductive backing to heat the paper and develop an image.The member comprises a plurality of closely spaced resilient fingers which extend across the width of the web. A curved crown on each of the fingers protrudes through a slot in a plate over which the paper passes. The ends of the fingers are restrained by the slot so that they are not readily susceptible to damage.

Abstract: A non-fouling print finger having an integral shield. The shield guides rdue passed the print stylus to a reduced area of the print finger body from whence the residue falls from the print finger. The shield also prevents excessive bending of the print stylus movable arm in the reverse direction during cleaning.

Abstract: A facsimile stylus assembly comprises one or more electrical conductors which are completely enshrouded by an electrically insulating sheath except for one end of the conductors which terminates in an uninsulated surface so as to form an output electrode. In one specific embodiment, the sheath comprises an electrically insulating cable having opposed flat surfaces and a plurality of spring wires which are situated within the cable. The spring wires are parallel to and insulated from the conductors. The spring wires are curved to bias the stylus assembly against the document upon which the facsimile recording is to be made.

Abstract: An improved brush holder for use in a rectilinear recorder which utilizes a web of electrical recording paper, which passes across, and in contact with a plane metal back-up plate. A narrow belt loop is supported by a pair of spaced rollers and is driven in a direction transverse to the longitudinal motion of the recording strip or web. One linear portion of the loop of the belt is parallel to and spaced a small distance from the plane of the metal back-up plate. The belt is of insulating material and has attached to it an electrical contact means which is a metal plate fastened to the belt and transverse to the axis of the belt and is long enough to extend some distance on each side of the belt. An electrical contact plate is mounted in the plane of the back-up plate and spaced from it. The belt is positioned so that the two ends of the contact plate extend respectively over the back-up plate and the electrical contact plate.

Abstract: Sheathed electrode for metal paper printer in which the core is of material having a higher melting point than the encasing material. This arrangement permits the use of electrodes having smaller cross-section and attainment of finer resolution since only the core is effective during marking.

Abstract: A stylus for the thermal recording of information on a heat sensitive recording medium which includes an electrically insulated member of low thermal conductivity which supports a pair of electrical conductor strips on the sides thereof so as to dispose such strips in opposed spaced relationship to each other. The conductor strips run along the length of the member and terminate at the lower end thereof. That end is also coated with an electrically resistive film which contacts the lower spaced ends of the conductor strips so as to form a current path therebetween. Electrical connections are attached to the upper ends of the strips for connecting the current path to a power source such that current passing through the path produces localized heat at the stylus tip.

Abstract: An electrostatic recording multi-stylus electrode device is capable of reducing significantly the electrostatic capacity between the connecting wires and between the lead wires of the multiple stylus electrodes of the electrode device by providing a plurality of insulating base plates, for supporting the wires, for each row of the multiple stylus electrodes so as to dispose the wires sufficiently apart from each other.

Abstract: A recording device for recording on electro-sensitive paper, comprising a recording head with a row of recording electrodes which consist of taut wires which freely extend through the air between grooves in a unitary support. The paper is passed between the recording electrodes and a straight backing member which is arranged opposite the centers thereof.

Abstract: The device comprises multiple stylus electrodes embedded in a row in an electrode support member, a plurality of common connecting conductive members which are arranged at substantially the same distance from the row of multiple stylus electrodes, parallel to each other with substantially the same distance therebetween, and which are disposed on a curved insulating base plate so that the lead wires for connecting the multiple stylus electrodes to the common connecting conductive members are substantially the same in length. The lead wires are arranged so as to be spaced from each other as far as possible for making uniform the distribution of the capacity of the capacitors formed between the respective lead wires and for reducing the absolute value of the capacity of the capacitors.

Abstract: In a high resolution electroerosion printer, a print head comprises a print head body of plastic or glass in which are embedded closely spaced glass tubes. The glass tubes provide low friction passageways for fine wire electrodes which extend through the glass tubes protruding beyond the print head body to be in uninterrupted flexible contact with the metal layer of a record medium. A pair of feed rolls frictionally engage the individual wires such that when the feed rolls are operated they can adjust the position of the wires to compensate for wear of the ends thereof in contact with the metal layer.

Abstract: An electro-erosion head is provided which is formed from thin sheets of electrically conductive material. Each thin sheet of electrically conductive material has at least one narrow extension extending from an edge thereof to form an electrode. A connector tab extends from another edge thereof. Each sheet is coated with a thin covering of an insulative material except in the area of the connector tab which is tin-lead coated for eventual soldering. The sheets are stacked to form a laminated head and are encapsulated in a plastic-like material which is ground down at the ends of the electrodes so that they are exposed so as to be able to complete the electrical path therefrom and perform the electro-erosion function. The electrodes are located at the same location on each of said sheets so that when stacked they form a column of electrodes each capable of forming a spot in the electro-erosion process.

Abstract: A writing head overlying a recording medium, in the form of a sheet with edges respectively extending in mutually orthogonal directions X and Y, carries a linear array of equispaced electrodes extending in the X direction over a fraction of the width of the sheet. The writing head is displaceable in the Y direction along a supporting bar which in turn may be moved in the X direction. A control unit commands the selective energization of these electrodes to record a dot pattern as the writing head moves in the Y direction to sweep a column of dot positions, the column being wide enough to accommodate several alphanumerical characters and/or graphic symbols read out on a line-by-line basis from a plurality of memory sections. With at least one additional linear electrode array on the writing head, generally transverse to the X direction, heavy lines or curves may be traced on the recording medium.

Abstract: Electrographic paper is fed over a segmented platen where its dielectric surface receives image defining electrostatic charges deposited by styli bearing directly and successively upon it. The styli are integral to an endless belt moving laterally to the surface. Voltage pulses corresponding to the input information are applied to the segmented platen to produce the electrostatic charges. The latent image charged surface is progressively fed to an image toning and fixing cycle to produce a hard copy.

Abstract: An improved recorder for recording substantially simultaneously across the width of a relatively wide sheet of electrosensitive material has a fixed head made up of a laminar stack of recording styli or, as referred to herein, recording pins. Adjacent pins are offset from one another a distance sufficient to allow the passage of a purging fluid therethrough. The purging fluid conveniently may be supplied from a source of low pressure air.

Abstract: A graphic curve digitizer is disclosed wherein the x-y coordinate values of a response curve (made electrically conductive) are obtained by a digitally controlled x-y conductive probe and electronic system sensing when the probe contacts the curve by the voltage signal existing in the conductive curve due to the antenna effect of the conductive curve in an environmental alternating current electromagnetic field.

Abstract: A mount for a consumable electrode printer comprises a member which slidably receives an array of consumable electrodes which are biased to a printing position, a clamp for gripping the electrodes to prevent the sliding thereof, and a release for the clamp to allow the biased electrodes to advance to a printing position.

Abstract: In order to increase recording quality the electrode pin of a device for electrostatically printing characters consists of a whisker which is mounted to be electrically conductive in a metal holder. A whisker is by definition a monocrystalline member.

Abstract: In a method and apparatus for electrostatically recording on a dielectric coated sheet, a recording head carrying a stylus array is spaced apart from the sheet to form an ionization gap. A charge image is transferred to the sheet by applying an activating voltage between selected styli and a back-up electrode. All styli receive a D.C. bias voltage and selected styli additionally receive "write" pulse voltage. The sum of the bias and write pulse voltages exceeds the threshold breakdown voltage of the gap to ionize the air in the gap under the selected styli. The charge image, created by the ionized air, is subsequently toned to form a visible image. The magnitude of the threshold breakdown voltage is dependent on the length of the gap and the required magnitude of the write pulses depends in part on how accurately the length of the gap is maintained constant.

Abstract: A stylus for attachment to a facsimile recording belt is formed of springy sheet metal such as stainless steel in the form of a foot with a toe bent downwardly from the end of the foot, and a leg extending upwardly at an angle over the toe to a recording surface. The leg has a cut-out portion intermediate the recording surface and a flexible hinge between the leg and the foot.

Abstract: The present invention relates to a recording mechanism of a picture and writing transmission and recording system using a ball-point-pen which is pressed to a recording surface with some pressure corresponding to electrical signals obtained from informations of letters, marks and pictures so as to put ink on the surface. The present invention is characterized in that a moving coil, which is connected with the said ball-point-pen and is set in magnetic field so as to be controlled with signal current, is freely movable in the axial direction of the ball-point-pen in a certain range so that the pressure of the ball-point-pen which is given to the recording surface and corresponding to a determined signal current is kept essentially uniform.

Abstract: In a cassette for a facsimile recorder with a moving electrode which scans across a recording web and marks the web with graphic signals electrically applied between the moving electrode and a cooperating linear electrode, the cassette has a tubular housing and a lip extending from the housing. The linear electrode is polygonally cylindrical in cross section and is attached to the underside of the cassette lip.

Abstract: In a facsimile recorder of the type having a relatively fast moving helical scanning electrode opposed by the linear portion of a very slow moving looped electrode or blade, the linear portion is guided in a track with a wall engaging one side of the blade. On the opposite side of the linear portion a strip with spring fingers holds the blade electrode precisely straight against the track wall.

Abstract: An electrode stylus which is arranged in an aperture of a rotatable printing roller is secured in a cylindrical insert of the roller by means of an electrode holder. The electrode holder comprises a constriction in the center, so that it is sub-divided into an adjusting portion which supports the electrode and which can be slightly bent, by means of adjusting screws, transversely of the jacket surface of the roller, and a fixing portion which can be fixed in an aperture in the insert by means of a fixing screw. The adjustment of the height of the stylus is effected, after the loosening of the fixing screw, by an arm which can be inserted into the insert and which is radially pivotable therein relative to the roller axis. Microscopic adjustment of the electrode stylus in the tangential as well as the radial direction relative to the roller is thus possible.

Abstract: A modular stylus assembly for printing on electrosensitive sheets includes, in combination, a print-head module having a first wall, a pair of spaced second walls extending from the first wall and defining a channel therebetween, and a multiplicity of stylus wires extending rectilinearly and in parallel alignment through the second walls and within the channel alongside the first wall, and a connector module receivable in the channel and includes a multiplicity of alternating electrically conductive and electrically insulating wafers respectively disposed in planes extending through the pair of spaced second walls, the electrically conductive wafers being spaced from one another by the electrically insulating wafers a distance corresponding substantially to the spacing between the parallel stylus wires whereby the electrically insulating wafers of a connector module received in the channel are respectively in electrically conductive engagement with the stylus wires, the connector module having means for selec

Abstract: A support for the stylus used in an electronic stencil cutting machine for burning or engraving information into stencil material mounted for relative movement with respect to said stylus, includes a t-shaped, blade-like body having a free end portion and a base portion, with the stylus being attached to the free end of the former. A second blade-like portion is affixed at a first end away from the base portion, to the free end portion of the body in an overlying relation, for dampening vibrations to the stylus as the latter passes over the stencil material and/or clamp for securing the material to a support surface. A support base upon which the blade-like body is mounted includes a pair of spaced members between which there is positioned a permanent magnet.

Abstract: An automatic pencil apparatus for an automated drafting system comprises a gripping means for holding and lifting a lead. The lead is pressed by means of a pressing means. The gripping means is actuated, by a driving means including an electromagnet, in the longitudinal direction. A change-over means supplys compressed air into the pressing means in response to up or down movement of the gripping means. The constant pressure is applied to the lead during drafting and plotting. When the lead is removed from a drafting sheet or is stopped, it is held and lifted up, so as to draw high quality lines and curves independently of the abrasion of the lead.

Abstract: A printing device is provided which includes a feeler pivotally mounted on a printer frame and urged into engagement with record media positioned on a platen for printing. A magnetic element on the feeler coacts with a Hall generator on the frame to provide a control voltage which is effective to control a motor for positioning of the frame so that a print head mounted on said frame is located at a proper distance from the record media for printing thereon.

Abstract: An electrode and a recording head made of a plurality of electrodes. Each electrode has a mounting portion and a flexible portion having a resilient tongue and an arm provided with a recording tip on its end, all formed by a thin unitary metal plate. The insulated and assembled electrodes together constitute the recording head. The electrodes are aligned by means of two members which project through holes in the mounting portions of the electrodes, and recesses aligned in an edge of each electrode form a groove for an electrical connection plate.

Abstract: A modular electrolytic recorder comprises four mechanical subassemblies and one electrical module for easy construction and replacement. Upon the chassis subassembly is mounted the anode subassembly including a flexible anode, a helix drum subassembly and a gear box transmission subassembly to which is attached the printed circuit board electrical module.