Abstract: An electrophotographic typesetting system having a raster scanning means including means for directing a beam of modulated radiation across an imaging surface, means for providing relative motion between said beam and an imaging surface to produce a succession of raster lines, and forming a plurality of characters on said surface,including means for providing first digital data defining the identity and location of characters, font storage means providing data defining the contour of a plurality of characters with respect to a normalized encoded set of first and second coordinates, data processing means connected to said first and second digital data for producing third digital data defining the character boundaries intersecting a raster line, means for modulating said beam to change the state of the beam from a first state to a second state at a first intersection and to reverse the state of the beam at a successive intersection, forming said characters on said surface, said data processing means including a

Abstract: A font storage system for a typesetter having an electronically controlled character imaging device includes a floppy disk and digital information stored on the floppy disk defining each character to be typeset. A series of vectors proceeding from a start point and extending around the character define the character outline. The vectors each are defined by start points, end points and the coordinate distances for each vector defining the slope and distance of each outline vector. The characters are encoded in digital form and at a normalized size. The electronic typesetter includes means for reducing or expanding the character size to type of various size characters from the single size or a normalized font size. Characters enlarged beyond a predetermined size may have excessive outline angles at the coincidence points of the contiguous outline vectors.

Abstract: An electrophotographic typesetter including a scanning system having a light source, means for receiving said light from said source and rotationally scanning said light through a curvilinear scanning locus, means for receiving said curvilinear scanned light and redirecting the light onto a straight line scanning locus, said redirecting means redirecting the light at an angle to the incident light, said means for producing said curvilinear scanned locus having an axis of rotation, said means for redirecting having a center of curvature, and wherein said straight line scanning locus is on a plane passing through said center of curvature, and perpendicular to said axis of rotation.

Abstract: A font storage system for use in a typesetter having an electronically controlled character imaging device. The storage system, which preferably includes a floppy disk, has digital information stored thereon defining each character to be typeset by at least two outlines on a normalized X-Y grid. The digital information defining each character includes (1) digital numbers defining the X and Y coordinates of the initial start points of the outline and (2) digital numbers defining a plurality of straight line vectors extending successively along the character outlines. Each vector has a first digital number representing the X coordinate distance and a second digital number representing the Y coordinate distance from one end of the vector to the other.

Abstract: An electronic fuel injection system is provided with a closed loop control having a plurality of loops for proportioning a mixture of air and fuel delivered to an internal combustion engine. The system has a sensor for providing an electrical signal, the magnitude of which varies in proportion to the concentration of a constituent of exhaust gas from the engine. A first of the loops compensates for small amplitude, short term disturbances of said signal. The second loop compensates for large amplitude, long term signal disturbances. Signals from the first and second loops are combined to produce a composite signal that maintains precise control over the average air/fuel ratio while generating rapid small amplitude fluctuations in that air/fuel ratio which shortens the response time of the system and increases its ability to reduce exhaust gas pollutants.

Abstract: A breakerless magneto ignition system for an internal combustion engine, having an inherent speed limiting feature is disclosed. The ignition system includes an ignition coil with primary and secondary windings, a drive winding and a trigger winding. A first solid state switch is placed in circuit with the primary winding for controlling current flow through the primary winding, the drive winding controlling the solid state switch to render it conductive to allow current flow through the primary winding, and the trigger winding and an associated switching circuit subsequently shunting the input to the first solid state switch to render it nonconductive, to block current flow through the primary coil and induce an ignition spark voltage in the secondary winding. The primary winding, secondary winding and drive winding are mounted on the same magnetic frame adjacent a magnet-containing flywheel, and the trigger coil is mounted on the lower edge of the secondary winding in close proximity to the flywheel.

Abstract: A furnace contains a plurality of zones. Each zone has at least one electrode adjacent a separate electrode of an adjoining zone. The adjacent electrodes are connected to separate power supplies, specifically separate windings of a transformer. In this manner, zones can be arranged immediately adjacent each other while minimizing current paths between non-associated electrodes to substantially zero. It is therefore, unnecessary to otherwise widely space firing zones within a furnace, and the spacing within the furnace may be filled with closer adjacent firing zones.

Abstract: An electrophotographic typesetting system having a scanning means for scanning a light sensitive image support surface with an information containing light beam and for imaging said information on said surface, said system having means for driving the light beam through a curvilinear light path, means for converting said curvilinear light path to a straight line scanning locus at said surface, means supporting said surface and moving said image support surface, means providing information in digitized format including means for providing first digital data defining the identity and location of characters, font storage means providing data defining the contour of a plurality of characters with respect to a normalized encoded set of first and second coordinates, digital processing means connected to said first and second digital data for producing third digital data defining said characters, means for modulating the light beam responsive to said third digital information, said system including an optical assemb

Abstract: The present invention is concerned with an electrophotographic apparatus for producing high quality, toned, first generation images.

Abstract: The hydraulic head of a cold top electric furnace for melting of batch, such as glass batch, employing an electric resistance heater, is electrically controlled by sensed temperature. The temperature is measured below the batch layer or crust at the area of interface transition from the solid material to the liquid melted state. A second sensor is placed within the furnace liner below and adjacent the screen heater within the molten material. The temperature signals at either of the locations are related to the hydraulic head within the furnace. The head is controlled responsive to these temperature signals by either adding additional material or diminishing the amount of material being added to the furnace.

Abstract: A relay is provided for reversing the direction of current to an electric motor and providing for dynamic breaking when power is disconnected. The contacts are cantilevered from a pivoting support driven electromagnetically. Mounted inwardly of the cantilevered contacts, are a pair of cantilevered springs. Each cantilevered spring is adjacent to, and associated with, a respective cantilevered contact. When the relay is energized, displacing one of the cantilevered contacts, a respective cantilevered spring is deflected against the cantilevered contact to provide a force additional to the force induced by the cantilevered contact support. Additionally, a fulcrum is provided for supporting pivotal movement of an armature supporting the cantilevered contacts, and which is combined with the magnetic flux path of the relay.

Abstract: A font storage system for use in a typesetter having an electronically controlled character imaging device. The storage system, which preferably includes a floppy disk, has digital information stored thereon defining each character to be typeset by at least two outlines on a normalized X-Y grid. The digital information defining each character includes (1) digital numbers defining the X and Y coordinates of the initial start points of the outline and (2) digital numbers defining a plurality of straight line vectors extending successively along the character outlines. Each vector has a first digital number representing the X coordinate and a second digital number representing the Y coordinate distance from one end of the vector to the other.

Abstract: A method and apparatus are provided for controlling the amount of dry particulate matter and liquid added to a rotary pelletizer. A transducer placed within the pelletizer senses a characteristic of the mixed material in the pelletizer. This characteristic may be, for example, the level of the batch or the size of the pellets. The transducer signal is then conditioned to provide a signal level corresponding to a desired characteristic level and which varies about that level corresponding for example to the variations of pellet size about a desired size. That signal is added to a second signal representing the actual liquid flow into the pelletizer or added to a second signal representing actual dry particulate flow into the pelletizer and modulates that respective flow to maintain the input of either the dry or the liquid material into the pelletizer as necessary. Additionally, a set point signal can be provided as a constant signal representing desired dry particulate in flow or liquid in flow.

Abstract: Where electrodes mounted in an electric melt furnace are inclined toward each other, the current distribution between the electrodes is the least in density in the region between the electrodes where the displacement is the widest, and increases in the region between the electrodes at the tips where the displacement is the narrowest. The maximum current density can be focused in a particular area, preferably toward the upper regions of the electric melt furnace where the batch is being melted to its liquid state. Additionally, the high density current is removed from the walls, and wear and tear on the refractory is thereby reduced. An alternate embodiment is to group a number of inclined electrodes and to excite each of the separate electrodes within the group from a separate phase of the power supply. This produces current paths between each of the inclined electrodes in the group, and is used after the furnace is cooled down and hot spots must be created to start the furnace up again.

Abstract: This invention, is an apparatus for grading pellets produced by a pelletizer from dry particulate batch material and a liquid, as for a melting furnace such as a glass furnace. The pellets are sensed by passing the pellets adjacent a graded passage. When a pellet reaches a graded passage matching its size, the pellet drops through the passage and at the same time actuates a sensor indicating a pellet of that respective size. The sensor is connected to a counting device which then can provide, through an appropriate control device, a count of over or undersized pellets or the pellet distribution. This information then can be appropriately used by the control device to control the amount of dry batch material or the amount of water introduced into the pelletizer and to maintain the pellets within a desired range.

Abstract: A digital typesetter for imaging graphics quality characters of a specified font. The typesetter includes an electronic data processing system which receives first digital data defining the identity, form, size and placement of characters to be typeset; receives second digital data defining the contour of each character to be typeset with respect to a normalized encoding set of first and second coordinates; and produces third digital data defining the character boundaries intersecting a raster (scan) line. This third digital data, for at least a portion of the raster line extending the width of several characters, is temporarily stored in a raster line storage buffer. A character imaging device, connected to the line storage buffer, is provided to image successive raster lines on a print medium. Drive means are also provided for moving the print medium in a direction transverse to the direction of the raster (scan) line.

Abstract: A telephone switching system comprising a central office switching unit and a remote field switching unit controlled by the central office unit. The field unit provides controlled connections between a number of trunks extending from the central office unit and a greater number of subscribers connected to the field unit. The field unit additionally contains a number of intracall lines for establishing a connection between two subscribers without the need for sustained trunk connection after the call is established. The central office unit includes a system controller comprising a microprocessor and associated memory units. The system controller receives information interrupts from both the central office unit and the remote field unit as to subscriber calls, subscriber identity, trunk availability and overall system condition alarms. Appropriate control signals are sent from the central office unit to the remote unit to establish the appropriate connections between the units for subscriber connections.

Abstract: Four color separations are produced from a single full-color photographic transparency. The transparency is mounted on the transparent curved surface of a rotatable cylinder and light is directed axially into the cylinder and out through the transparency to a photomultiplier. The illumination of the transparency is provided by red, blue and green light in time sequence, and the itensity from each color is stored separately while the transparency is being scanned and used to produce the separations contemporaneously on photosensitive paper on a second cylinder. The transparency is scanned axially of the first cylinder, which is rotated. The relative speed of rotation of the cylinders is used as a control of the magnification of the reproduced separations. A further photomultiplier is used to provide unsharp masking, and color correction is applied between the color intensities detected by the photomultiplier.

Abstract: The output shaft of an electric motor is supported by a ballbearing mounted on the motor end plate. The outer race of the ballbearing is positioned in a cup having a semispherical portion. The motor end plate includes a socket portion to receive the semispherical portion of the cup. A retainer plate of spring metal is mounted on the motor end plate. A plurality of resilient finger-like extensions on the retainer plate press the outer race in the cup and the cup in the socket. The cup swivels in the socket. By reason of that, the outer race can be shifted with respect to the inner race, and the entire bearing can be shifted with respect to the motor end plate. A collar, containing a plurality of legs, the ends of which define a plane perpendicular to the shaft axis, is slid down the shaft. The legs pass through a like plurality of holes located in the end plate to contact the cup. Pressing the legs against the cup causes it to swivel in the socket until all the legs contact the cup.

Abstract: A font storage system for use in a typesetter having an electronically controlled character imaging device. The storage system, which preferably includes a floppy disk, has digital information stored thereon defining each character to be typeset by at least two outlines on a normalized X-Y grid. The digital information defining each character includes (1) digital numbers defining the X and Y coordinates of the initial start points of the outline and (2) digital numbers defining a plurality of straight line vectors extending successively along the character outlines. Each vector has a first digital number representing the X coordinate distance and a second digital number representing the Y coordinate distance from one end of the vector to the other.