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| Number | Title | Issue Date |
| 5525981 | Cordless digitizer transducer/cursor status transmission apparatus and method A cordless transducer/cursor having a transmitter for use in conjunction with the receiver of a digitizer tablet. The transmitter receives parallel binary signals representing the status of non-positional functions such as command button status and the pr... | 06/11/1996 |
| 4853499 | Ground switching technique for silkscreened digitizer grids A method and associated circuitry for use in an electromagnetic digitizer having a plurality of first grid conductors connected from a first multiplexer controlled by a first enable input to ground and a plurality of second grid conductors connected from ... | 08/01/1989 |
| 4705414 | Printhead mounting and movement control assembly An assembly for positioning a print head so as to transfer ink from an ink ribbon to a printing medium positioned on a movable platen adjacent to said ribbon supports the print head on a rocker member which enables the head to be swung between a print pos... | 11/10/1987 |
| 4691605 | Cutter assembly with rotating knife blade A cutter assembly (82) for cutting web material such as paper (80) includes a circular cutter (100) having an endless peripheral blade (102) mounted on a frame (92) on which also is mounted a tension roller in the form of a pulley (94). A smaller pulley (... | 09/08/1987 |
| 4677572 | Pen turret control system A control system for controlling a turret head in a pen plotter wherein the turret head and pen holder move in combination with the pen carriage to provide turret selectability at the writing site. Sensors and associated logic are provided for detecting t... | 06/30/1987 |
| 4673304 | Thermal printer ribbon cartridge for wide ribbons A user-friendly ribbon cartridge to house and to facilitate handling a wide thermal transfer ribbon for a thermal color printer is composed of first and second casing sections which define a slotted let-off tube and a slotted take-up tube and turnbar. A p... | 06/16/1987 |
| 4659874 | X-Y position sensor In a sketch pad embodying the present invention, the sensing pad has an array of generally parallel pairs of adjacent sensing conductors which, for the purpose of this explanation, will be condidered as extending in the horizontal or X direction. Each con... | 04/21/1987 |
| 4654667 | Signal-acquisition system for a circular array A signal-acquisition system (10) for a circular antenna array (12) includes a two-dimensional compressive receiver (18) that performs a two-dimensional Fourier transformation in time and position on the outputs of the array. Each of the outputs of the com... | 03/31/1987 |
| 4645869 | Digitizing tablet A flexible circuit (28) containing the grid connectors of a digitizer tablet (10) converge in a transition region (48) disposed in an unshielded area. However, the positional inaccuracies that would otherwise result from the exposure of the non-parallel c... | 02/24/1987 |
| 4539574 | Pen capping mechanism A pen capping mechanism for use in an X, Y graphics plotter, or the like, having a plurality of pens with writing tips requiring sealing between periods of use. A flat bar of plastic is provided as a slider member with an upper surface adapted to sealably... | 09/03/1985 |
| 4537582 | Plotter paper slitter A slitting apparatus employing safety features and particularly suited for use in slitting strip paper as employed in a graphics drum plotter. A housing is provided which is adapted to be releasably attached to the frame of the plotter adjacent the takeup... | 08/27/1985 |
| 4512505 | Convertible platen for graphics plotter A convertible platen for use in a graphics plotter to allow its selective use as either a cut paper plotter or a roll paper plotter. The platen is formed from a specially designed aluminum extrusion and a pair is mounted with one on either side of the dru... | 04/23/1985 |
| 4468668 | Method for processing signals in a navigation receiver A method for processing navigation signals received by a LORAN-C receiver to lessen the effects of noise on the navigation data provided to the receiver user. Time of signal arrival information measured by the receiver is modified depending on the signal-... | 08/28/1984 |
| 4409681 | Transducer An electro-mechanical transducer is disclosed in which a piston-like radiating element is driven by fluid pumped from the interior of a flextensional transducer such that the motion of the flextensional transducer shell is transmitted to the radiating ele... | 10/11/1983 |
| 4409477 | Scanning optical system A scanning system providing a linear scanning beam utilizing a fiber optic bundle, one end of which forms a circle which is scanned by a light beam and the other of which forms a straight line. Other fibers are within and external to the circle formed by ... | 10/11/1983 |
| 4057797 | All digital delta to PCM converter A digital circuit for converting a delta modulated signal to a binary coded signal without producing an interim analog signal. The principal portions of the circuit are an up-down counter, a read-only memory the instantaneous output of which is controlled... | 11/08/1977 |
| 4052970 | Air-fuel ratio control system utilizing oxygen sensor and pressure differential sensor An air-fuel ratio control system for an internal combustion engine includes an air intake connected to a burning chamber having an oxygen sensor and an intake manifold to an engine combustion chamber. Fuel is mixed with air in both the air intake and the ... | 10/11/1977 |
| 4037170 | Difference amplifier having extended common mode range A difference amplifier, the construction of which includes operational amplifier, has an extended amplitude range of common mode signal. The input of the circuit which is applied to the inversion input of the operating amplifier is applied to the latter t... | 07/19/1977 |
| 4034871 | Adapter for mounting printed circuit cards A printed circuit card adapter for mounting on an elongated stud comprises a bar-like member having at least one surface area having a contour substantially conforming to the surface of the elongated stud upon which it is mounted. Guide means are disposed... | 07/12/1977 |
| 4029907 | Asynchronous digital repeater An asynchronous, regenerative, digital repeater for use in bipolar digital signalling systems includes an amplifier for receiving and amplifying incoming signals, a first monostable multivibrator for producing regenerated pulses responsively to the output... | 06/14/1977 |
| 4021624 | Automatic call generator An automatic call generator is connectable with the main distribution frame of a common control telephone system and monitors the operation of the system. To this end, the automatic call generator is connected to dedicated line and trunk circuit ports and... | 05/03/1977 |
| 4017691 | Number translator A number translator which includes a memory system for storing directory and equipment numbers as well as other subscriber data has a digit store for storing data received from a register prior to its being passed on to the memory system, a register sende... | 04/12/1977 |
| 4015745 | Reusable seal with thermal expansion compensation A container assembly for a telephone repeater or the like including a circular flat base of metal and a dome-like cover of plastic. The cover includes an outwardly extending, flared flange for engagement against a chamfered outer edge portion of the base.... | 04/05/1977 |
| 4011517 | Timer apparatus for incrementing timing code at variable clock rates A timer circuit receives a multi-bit digital signal representative of a timing code to be incremented. In dependence upon the coded value of the received signal, the code represented by the signal will be incremented at a selected clock rate. The clock ra... | 03/08/1977 |
| 4002850 | Trunk adapter A trunk adapter is associated with a common control private automatic branch exchange telephone system for interfacing the system with a central office. Four different types of adapters are associated with the system to effect a ring-down incoming, loop s... | 01/11/1977 |
| 3999018 | Timer associated with CB relay A circuit for detecting a true seizure condition of a trunk calling bridge relay employs a timer which is incremented every 40 milliseconds as long as a continuous trunk off-hook representative signal is supplied thereto for approximately 300 milliseconds... | 12/21/1976 |
| 3999019 | Private automatic branch exchange providing line appearance connection of operator complex to single stage matrix An electronic private automatic branch exchange may avoid the need for access trunks and information trunks in the operator complex by utilizing a single stage switching matrix to effect connections between line circuits, trunk circuits, and the operator ... | 12/21/1976 |
| 3999085 | Noise rejection circuit A digital interface especially useful for isolating a speedily responsive circuit from the effects of transients at its input such as may be caused, for example, by contact bounce in a relay. The circuit includes a monostable multivibrator connected to be... | 12/21/1976 |
| 3992592 | Scanner-marker arrangement for telephone system A scanner arrangement for scanning both line circuits and incoming trunk circuits simultaneously in groups with priority being given to the scanning of incoming trunk circuits. A sequencing means provides for individual scanning of line circuits of respec... | 11/16/1976 |
| 3987375 | Transmission bridge exhibiting reduced distortion A telephone transmission bridge including a transformer having primary and secondary windings, connected between first and second input leads and first and second output leads, respectively, has a varistor connected in series with a relatively small numbe... | 10/19/1976 |
| 3975595 | Service code conversion A method of service code conversion and a service code conversion control circuit are disclosed for translating a dialed service access code in an abbreviated form into the directory number of a line circuit. A class-of-service indication assigned to a ca... | 08/17/1976 |
| 3975597 | Call queue release control circuit A call queue release control circuit for automatic toll switchboards is disclosed. The call queue release control circuit is supervised by a plurality of multi-position switches that are set in accordance with decisions made at a chief operator position a... | 08/17/1976 |
| 3963873 | Local transfer arrangement for electronic private automatic branch exchange A local transfer arrangement for an electronic private automatic branch exchange having a space divided rectangular solidstate switching matrix is disclosed. The local transfer arrangement is provided with means for sensing a local transfer indication fro... | 06/15/1976 |
| 3963875 | Universal answer arrangement for a PABX A universal answer arrangement for a PABX in which incoming trunk calls are automatically connected, when all operator positions are busy or unattended and equipped for universal answer service, to a pre-designated line circuit or, at night, to one or mor... | 06/15/1976 |
| 3943297 | Electronic private automatic branch exchange An electronic private automatic branch exchange is built around a space divided solid state matrix. One side of the solid matrix provides line appearances which are connected to line circuits, tone receivers, senders and operator loops. The other coordina... | 03/09/1976 |
| 3933233 | Control circuit for subscriber station in video telephone system A control circuit for a subscriber station in a video telephone system includes detectors, gates, and toggles responsive to the various local and incoming supervisory signals to control operation of the local audio and video receivers and transmitters, an... | 01/20/1976 |
| 3933187 | Controlled epoxy dispensing technique as related to transistor chip bonding Apparatus and method for the uniform dispensing of a conductive epoxy binder in hybrid microcircuit applications. A method is disclosed of uniformly pressurizing a conductive epoxy binder through a small orifice until a droplet of fixed volume forms, sett... | 01/20/1976 |
| 3932016 | Printed circuit card receptacle A printed circuit card receptacle formed of one or more edge connectors having a pair of opposed, slotted card guides affixed thereto. The receptacle includes a mountable connector having a channel member at either end thereof for receiving the guide. Eac... | 01/13/1976 |
| 3932712 | Telephone transmission system A telephone system comprises a non-loaded, non-equalized cable interconnecting a pair of communication terminals so that audio signals are translated in one direction and modulated carrier signals are translated in the other direction. A direct current by... | 01/13/1976 |
