Abstract: A vocal timing indicator for use in voice recognition systems. The timing indicator provides a visual or audible signal to a user to mark the beginning of the time period in which the user is to speak into the microphone associated with the system, thereby ensuring that the proper input signals are used by the system to determine speaker identity or to assist in the recognition of the words uttered.
Abstract: A microprogrammable computer system including a central processing unit having a main memory storing data and a microprogrammed control memory consisting of a plurality of read-only memory chips containing microprograms, provides for various variable field addressing, multi-way branching, push-down stack and byte string operations that share common instructions and hardware. Using the system, a contiguous set of bits may be accessed or stored in the main memory without regard to memory word boundaries, the number of bits in the set, or the location of the bits in a memory word. The variable field addressing features are based upon the use of two types of instruction words, viz., field addressing instructions and field descriptors, which extract the appropriate bits from main memory and process them according to the instructions specified.
August 6, 1973
Date of Patent:
August 22, 1978
Alfred W. England, Louis M. Krasny, Edward F. Narey
Abstract: Method and apparatus for inverting the polarity of an input image formed on a surface of an image recording device which deforms when illuminated in the presence of an electrostatic field applied thereacross. The image recording device, comprising a layered structure consisting of a conductive transparent substrate, a photoconductive layer, a deformable elastomer layer and a deformable, reflective layer is raster scanned by information containing light through the photoconductor layer with voltage applied between the conductive electrodes, the elastomer and deformable electrode being deformed in accordance with the input information. The image projected from the surface of the deformable electrode is positive, light characters on a dark background. In order to project a negative image (dark characters on a light background), the device is initially flooded with light through the photoconductor layer with voltage applied between the conductive electrodes.
Abstract: A laser scanning system wherein the scanning line is produced by interposing a computer generated hologram and lens between an illuminating laser beam and the plane of the scan line. Three types of scan patterns (one, two and three dimensional), continuous as well as discontinuous, can be realized by utilizing the principles of the invention.
Abstract: A consumable credit card is provided which comprises a recording device that is adapted to receive progressively advancing recording up to a limit at which time the card is consumed and thereafter is discarded. The card is adapted to be inserted into a reader which accepts, reads and advances the indication on the credit card or reading to indicate an additional use until the credit card is expended and the reader no longer allows the item or service to be dispensed because the credit card has been expended. This credit card employs tapered resistor technology in order to store a permanent record of expended credit and advance same upon energization of the tapered resistor element residing in the device. Methods of employing this device in billing systems are also disclosed.
Abstract: A high speed multi-faceted polygonal scanner is provided by injection molding. An adhesion promoting coating is applied to the injection molded acrylic polygon in order to accept subsequently applied thin reflective coating of for example aluminum which provides the finished faces of the multi-faceted scanner. Methods of employing these scanning systems in flying spot applications are also disclosed.
Abstract: A low pressure metal or metal halide vapor lamp for photocopying applications. The low pressure sodium vapor lamp is operated in a continuous mode and provides illumination of increased brightness and of a color (yellow) which is optimum for providing a copy which is an accurate representation of the original. An auxiliary heater is formed on the lamp to both decrease the warm-up time of the lamp and to control lamp temperature for optimum light output, an electrical control circuit being coupled to the heater to control the current therethrough.
Abstract: A MOS control circuit for controlling an output signal, said control circuit being coupled to first and second sources of potential. The magnitude or peak-to-peak amplitude of the first source of potential is greater than the magnitude developed by the second source of potential. The control circuit output signal has a waveshape magnitude of desired dimension somewhere between the magnitude of the second source of potential and the magnitude of the first source of potential. In order to accomplish this, a first inverter receives and inverts an input signal and produces an output potential at a node. A clamping circuit reduces the potential at the node by a desired amount. A source follower is driven by the potential at the node and also receives the input signal. The output of the source follower is the control output signal.
Abstract: A method of making a diode laser in which a pump current confining channel is formed on the substrate side of a diode laser prior to growth of the active or recombination region of the diode laser. The current confining channel is formed by providing, by diffusion, a rectifying junction on a substrate surface and then forming, by etching, a narrow channel completely through a central portion of the diffused layer and the rectifying junction. The remaining layers of the diode laser are then successively grown. The portions of the rectifying junction on both sides of the channel are reverse biased when the primary junction of the diode laser is forward biased whereby pump current flow is confined to a path through the channel.
Abstract: A tapered resistor heating element is provided which sequentially heats and actuates in a controlled fashion heat sensitive media. In one embodiment a tapered resistor heating element sequentially heats in a controlled fashion heat sensitive switches. Heat sensitive resistors and heat sensitive threshold switches may also be employed in this configuration. This system may be utilized as a meter relay or as described in another embodiment as a scanner. Novel exclusive OR gates are also disclosed which are employed in one embodiment of the scanner of the instant invention.BACKGROUND OF THE INVENTIONThis invention relates generally to scanning devices and more specifically to monolithic electronic scanning devices.It is known that a major problem with matrix addressed displays and the like is the requirement for numerous connections in their implementation between the matrix elements and the ancillary addressing and driving devices. For instance, a display panel with 10.sup.6 matrix elements requires about 2.
Abstract: A thin film plastic is centrifugally cast against an aluminum preform which is placed in a precisely machined polygonal master in a conventional replica process. The plastic which may be an epoxy material is applied to the preform master assembly with centrifugal force causing it to impact in the cavity between the preform and the master to produce a bubble-free layer. Thus, a high speed multifaceted polygonal scanning system is provided which may be employed in a flying spot scanning application.
Abstract: A mechanism is provided for observing laser beam alignment with a start-of-scan detector chip, while the laser beam is being scanned in a horizontal direction. The start-of-scan detector is located on a target panel along with the input ends of a plurality of fiber-optic bundles. The input ends are in a vertical array with the input end in the center of the array being horizontally aligned with the detector chip whereby the scanned laser beam will strike both the chip and the center input end when the beam is aligned with the chip. If the beam is misaligned with the chip, the beam will strike one of the other input ends depending upon if the beam is too high or too low. The output ends of the fiber-optic bundles are arranged on an observation display panel to allow an observer to determine beam alignment or misalignment depending upon which output end is illuminated.
Abstract: An ink jet assembly comprises a magnetic driver and a liquid droplet instrument. The driver includes a plurality of magnets, which may be selectively energized. The instrument includes a diaphragm means, which forms an outer wall of each of a plurality of chambers and when exposed to a magnetic field, deforms to decrease the volume of a chamber to increase the pressure therein to express a liquid droplet therefrom. The driver and instrument are releasably secured to each other to permit replacement of the instrument without disposing the driver.
January 15, 1976
Date of Patent:
November 8, 1977
Kenneth H. Fischbeck, Richard H. Vernon
Abstract: A scanning polygon assembly is provided which comprises a plurality of identical facet blocks arranged in abutting relationship on a platform. The platform has an annular lip against which two corners of each block abut so the facets form chords along the lip to form a polygon. The abutting relationship between the blocks is a tight fit but not a forced fit in order that the blocks are free enough to allow the corners to engage the lip (and thus assure such engagement) due to the centrifugal force exerted thereon during rotation of the polygon.
Abstract: A mechanism for biasing a plurality of pinch rolls into engagement with a drive roll is provided wherein the biasing force is effected by a weight or weights. The pinch rolls are mounted on a common rotatable shaft, which rotates on supports which independently pivot about a common shaft, whereby the pinch rolls are free to align with a drive roll to provide full line contact therebetween and the biasing force is evenly distributed on the pinch rolls. The weights are pivotally mounted on the supports.
Abstract: A high density linear array ink jet assembly is provided wherein a multiple chamber unit comprises a chamber housing and at least one flexible diaphragm spanning and sealing the chambers from each other and forming one wall of each chamber. A plurality of actuators for deforming the diaphragm are secured to the diaphragm at each chamber. The actuators are independently activated to deform the diaphragm for a particular chamber thereby decreasing the volume thereof to create a pressure on liquid ink therein. In one embodiment, a pair of elongated coextensive ribbon members are located opposite each other and are separated by a plurality of spaced ferrite walls secured thereto. At least one of the ribbon members comprises a deformable laminate of two layers of different material which have significantly different strain characteristics in the presence of a magnetic field. The ribbon members and each pair of ferrite walls form a deformable chamber whereby a plurality of deformable chambers are formed.
October 28, 1975
Date of Patent:
June 28, 1977
Kenneth H. Fischbeck, Richard H. Vernon
Abstract: An ink jet includes a meniscus dampening passage, which carries a pressure front timed to arrive within an effective meniscus dampening vicinity of a droplet outlet orifice at substantially the same instant that a droplet leaves the orifice to dampen substantially the full period of meniscus vibration.DESCRIPTION OF THE INVENTIONWhen an ink droplet is expressed from a droplet outlet orifice, the new meniscus formed in the orifice, after the droplet leaves the same, vibrates until it reaches a stable condition. Since the meniscus must be stabilized in order to express controlled droplets, this period of vibration affects the frequency in which the droplets can be expressed through the orifice. The longer the period of vibration, the lower the frequency or the shorter the period of vibration, the higher the frequency.
Abstract: A set separator for offsetting sets of sheets of paper is provided. A first set of paddle wheels is provided which, in one position, directs a sheet of paper forwards towards a stop wall and to one side, and in a second position directs the sheet of paper forwards towards the wall and to the opposite side. A pair of sideposts is spaced apart more than the dimension of the leading edge of the sheet of paper so that only one post is engaged by one side edge of a sheet of paper, when the paddle wheels are in the first position, and only the other post is engaged by the opposite side edge of a sheet of paper when the paddle wheels are in the second position. The sideposts rotate in directions opposite to one another to move the sheet forwards toward the wall. A second pair of paddle wheels, also spaced apart more than the dimension of the leading edge of the sheet of paper so that only one paddle wheel engages the sheet of paper at a time, is located adjacent the stop wall.
Abstract: A scanning system is employed which utilizes an unmodulated beam for reading a document (original size or microfilm) and utilizes a modulated beam for printing an image (original size or a microimage) which beams both originate from the same laser source and strike the same facets of a polygon scanner at the same location or at spaced vertically aligned locations.
Abstract: An adjustable forms guide is provided on a xerographic computer printer platen for adjusting the position of a form on the platen to align or register the projection of the form through one optical system onto a photoconductor with data projected through another optical system onto the form at the photoconductor.