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"That’s an amazing invention, but who would ever want to use one of them?"
President Rutherford B. Hayes ; Said in 1876, after Alexander Graham Bell demonstrated the telephone to him at the White House
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| Number | Title | Issue Date |
| 4811240 | System for creating and controlling interactive graphic display screens A Graphic Development Instrument System (GDIS) provides a method and capability to design, create and update display screens, including static elements (never change) and dynamic elements (change responsive to stimuli) and is able to include any controlle... | 03/07/1989 |
| 4672536 | Arbitration method and device for allocating a shared resource in a data processing system An arbitration method and device for a data processing system wherein N units share a common resource, to allocate the shared resource to a given unit selected from a number of units requesting access thereto. An age value is assigned to each unit and correspo... | 06/09/1987 |
| 4558447 | Self-testing facilities of off-chip drivers for processor and the like Self-test techniques for checking driver circuits connected to a bus are described that particularly involve the detection and isolation of failures in off-chip-drivers and connections.... | 12/10/1985 |
| 4535467 | Switch logic for shift register latch pair A Level Sensitive Scan Design (LSSD) Shift Register Latch pair implemented in current switch logic is disclosed. The arrangement is characterized by the logic used to control the L1 and L2 latches being implemented in Differential Cascode Current Switch l... | 08/13/1985 |
| 4513283 | Latch circuits with differential cascode current switch logic Latch circuits implemented in multiple level Cascode Current Switch logic for performing various complex latch functions including Level Sensitive Scan Design (LSSD) testing and implementable in VLSI technology are described.... | 04/23/1985 |
| 4508204 | Gravity feed chute A chute for gravity feeding a plurality of like electrical components (1) to a pick-up station of a robotic controlled automatic assembly system comprises guide rails (2,3) down which components slide with their pins (13) extending between the rails. The ... | 04/02/1985 |
| 4502100 | Cooling system with counter flow of coolant A cooling system is described for modules on electronic circuit cards, the system typically containing a multiplicity of cards. Improved cooling is achieved due to improved boundary layer conditions established by counter air flow in opposite directions o... | 02/26/1985 |
| 4353653 | Font selection and compression for printer subsystem A printer subsystem receives command and data information from a host system and retains a large number of font images in an associated storage area within the printer subsystem. A base font image set is ordinarily selected by the user but provision is ma... | 10/12/1982 |
| 4335426 | Remote processor initialization in a multi-station peer-to-peer intercommunication system For a system including a plurality of processors which are interconnected by a communications link through individual communication stations, a method of remote processor initialization is disclosed which provides a specific frame exchange procedure for t... | 06/15/1982 |
| 4313683 | Microcomputer control of ribbon drive for printers A microcomputer controls a ribbon drive assembly in a high speed wire matrix printer to eliminte ribbon slack, to insure proper ribbon positioning and to conduct diagnostics in conjunction with turning on the printer such as start-up time each day and aft... | 02/02/1982 |
| 4313161 | Shared storage for multiple processor systems A system is provided that includes a plurality of processors connected to a shared storage via an asynchronous storage interface that includes various interface logic and a ring counter that performs polling of the processors for access to the shared stor... | 01/26/1982 |
| 4304497 | Detection of multiple emitter changes in a printer subsystem A data processing system or printer subsystem is provided with facilities for detecting emitter changes that have occurred during operating intervals. In a typical operation, a microprocessor initiates a command to a moving assembly, such as a forms feed ... | 12/08/1981 |
| 4290138 | Wire fire mapping for printers A diagnostic routine is provided for a printer or printer subsystem having a plurality of print wires and print heads arranged in a nonconventional wire image pattern, the diagnostic routine providing a printout of wire firing and misfiring to quickly and... | 09/15/1981 |
| 4285604 | Ribbon shield for printer A user replaceable printer ribbon shield of simple design is provided for use in high speed matrix printers utilizing continuous forms. The shield is detachably mounted. During printing, the shield prevents outfolds in the forms from catching on the ribbo... | 08/25/1981 |
| 4279199 | Print head image generator for printer subsystem A printer has print wires arranged in a plurality of print head groups, each group comprising a predetermined number of print wires, the individual print wire groups being arranged according to a slanted serrated wire pattern. A print head image generator... | 07/21/1981 |
| 4279520 | Print mechanism for wire printer A print mechanism for a wire printer has a robust single-turn closed-loop transformer secondary winding as the moving part for driving a print wire into and out of a print position. Each secondary winding threads a transformer core on which is wound a mul... | 07/21/1981 |
| 4278020 | Print wire actuator block assembly for printers A print wire actuator block assembly is described that accommodates a plurality of print wire actuators and print wires, the print wire actuators and print wires being arranged in two rows, the entire assembly forming a compact structure. The print wire a... | 07/14/1981 |
| 4261039 | Microprocessor controlled positioning system A microprocessor controlled printer includes a forms feed assembly, a dot matrix print assembly, a ribbon drive assembly and a number of emitter assemblies associated with the foregoing to provide positional information during operation of the printer whi... | 04/07/1981 |
| 4153945 | Multiplexed control subsystem for sensor based systems A sensor based system, such as a building management system, includes a central processor and an associated subsystem comprising at least a central panel interconnected with a plurality of remote panels, each of the remote panels being capable of further ... | 05/08/1979 |
| 4116562 | Optical system featuring change in magnification by combined lens and mirror motion The optical system disclosed is incorporated in a copying machine and has provision for changing magnification of original documents of diverse sizes while maintaining a common image plane projection and enabling the use of common reference edges at a sel... | 09/26/1978 |
| 4096578 | Data system with microprocessor featuring multiplexed data transfer and repeat cycle driving arrangement A system for processing data incorporates a central processing unit and a microprocessor serving as a controller together with associated logic for controlling operation of an attached device such as a serial or line printer. Data is transferred from the ... | 06/20/1978 |
| 4053878 | Method and apparatus for improving the clarity and character density on a dot matrix video display A method and apparatus is shown for improving the clarity and character density on a cathode ray tube (CRT) display in which characters are formed row by row from discrete character elements in row and column coordinate matrices. Unblanking signals form t... | 10/11/1977 |
| 3998785 | Anti-fungal and/or anti-bacterial hardware for ink printing apparatus A printer, such as an ink jet printer, incorporates various hardware such as the ink supply tank, tubing, and ink drop gutter, as representative items, having components molded in the hardware which disinfect groups of micro-organisms which present proble... | 12/21/1976 |
| 3992713 | Ink jet printing system with pedestal synchronization An ink jet printing system is provided with synchronization facilities including charging, deflecting, and gutter components and a technique is described for referencing synchronizing pulses to a pedestal voltage level to insure that the ink drop stream c... | 11/16/1976 |
| 3987883 | Ribbon lifting mechanism for a wire matrix printer An improved mechanism is provided for preventing long-term oil contamination of the print ribbon in a wire matrix printer. In the event that the print ribbon has an excess of oil thereon, it will cause the printed characters to be alternatively too light ... | 10/26/1976 |
| 3964591 | Font selection system A font selection system is provided that is useful in conjunction with ink jet printing apparatus. Facilities are included for storing data representative of one or more fonts or character sets and for selecting these on a font basis or a character basis ... | 06/22/1976 |
| 3947825 | Abstracting system for index search machine The invention concerns a system of English language abstracting used to increase the search rate for an Index Search machine that, as an example makes use of magnetic record cards each having in a typical case 50 tracks for recording of information. To in... | 03/30/1976 |
| 3947853 | Subscripting, superscripting, and character height compression in ink jet printing apparatus Techniques are described for producing superscripts (half indexing), subscripts, and character height reduction for an ink jet printer.... | 03/30/1976 |
| 3938113 | Differential capacitive position encoder Circuits and structures are arranged to serve as encoders, emitters, or switches by capacitive coupling.... | 02/10/1976 |
