Abstract: An n-position selector switch includes a binary counter which is clocked in response to a user actuated push-button type input. The counter's output is fed into a decoder, the output of which drives a visual display indicating the selected switch position. A detector at the counter output responds to a data pattern indicative of selection of the nth-switch position by initiating a counter load operation which resets the counter on the occurrence of the next pushbutton actuation.

Abstract: A disc file, for the storage of retrievable, informational data, on rotating media, where the media is subject to attrition from the mechanical interaction with its surface of an adjacently disposed, radially mobile transducer, the attrition limiting the operational life expectancy of the media by its ultimate effect of destroying, in whole or in part, the data storage properties of its surface, is provided with an apparatus which, by enforcing the unceasing transport of the transducer across the surface of the media, whenever it is not required, by the disc file, that the transducer be adjacently disposed to any specific radius, on the media, disperses the effects of attrition across the entire surface of the media, so eliminating the early destruction of the media resultant from localization of the attrition, thereby extending the working life expectancy of the media.

Abstract: Disclosed in a method of allocating available bandwidth between stations configured in a write token controlled loop communications network. When a station desires to reserve additional bandwidth to itself, it captures the write token and transmits a bandwidth allocation token which includes a field indicating the originating station's amount of currently reserved bandwidth. Each station on the loop adds to the field the amount of its currently reserved bandwidth. When the allocation token arrives back at the originating station, the write token is regenerated and transmitted. If the total amount or currently reserved bandwidth indicated in the allocation token plus the desired additional bandwidth sought to be reserved is less than the allocatable bandwidth, then the reservation is granted. The additional bandwidth desired is then added to the total reserved by the originating station.

Abstract: An improved processing apparatus for adjustable stroke rotary indexing is provided. The apparatus comprises a rotatable input shaft, an intermediate shaft drivably and mechanically coupled to the input shaft, an output shaft coupled to the input shaft by a one-way clutch, and means for selectively adjusting the angular stroke of the output shaft. The mechanical coupling between the input and intermediate shafts comprises a planar four-link mechanism configured to operate in crank-rocker fashion such that continuous rotary input motion will produce angular rocking motion in the intermediate shaft. The limit positions of the oscillating shaft are a function of the length of the crank in the planar four-link crank-rocker coupling. The crank comprises a first crank member mounted on the input shaft and a second crank member rotatably mounted with respect to and lockably engagable with the first member.

Abstract: A self-supported, free standing, demountable, printing/endorsing apparatus including a demountably removable, replaceable, adjustable printing module having ribbon transporting and re-inking means integral therewith. Solenoid actuated means operably, drivingly connected to an impact member for impact engagement with the demountable printing member enabling the device to print on an item. Secondary impression producing means is demountably carried by the printing means and is adjustable relative to the impact member and together with the impact member forms an item receiving pathway normal to the impact member through which the item is transported. The impact member is Gimbal mounted relative to the pathway effectively enabling printing without regard to the flatness of the subject matter of the item, and without the prior art high impact forces generally employed.

Abstract: A cable shield assembly for use with flat ribbon cable which protects electronic equipment and circuitry from the effects of electrostatic discharge.

Abstract: In the course of manufacturing a wafer-scale integrated circuit, the metalization for interconnection both within each cell and between cells is achieved by the etching of a single metal layer, photoresist being deposited on the layer and exposed using a step-and-repeat mask for those areas within each cell and using a whole-wafer reticle mask for the areas of interconnection between the cells.

Abstract: A screenable ink for forming conductors in a gas-filled display panel including aluminum and an aluminum alloy as important constituents and a panel including such conductors as reinforcing transparent conductive films.

Abstract: The present disclosure describes a heat exchange device for attachment to the external surface of a package containing an integrated circuit chip or die. The device has particular application in high density electronic packaging configurations, where space limitations severely curtail the volume which can be occupied thereby. The structure of the present device is such that both the effective cooling area per given volume and the heat transfer coefficient are maximized. Basically, the device is an integral structure comprised of a generally helical wire form affixed to a metallic frame-like member. The wire form provides a plurality of parallel closely spaced-apart cylindrical sections capable of being disposed in an air stream for dissipating the heat generated in the integrated circuit package to which the device is attached.

Abstract: A disc mounting and centering device, for use in a disc file employing removable, flexible rotary discs comprises guides 52 for locating a disc 40 such that a central and circular locating hole 48 in the disc 40 is approximately parallel planar and coaxial with a circular recess 12 of substantially the same diameter as the hole 48, set in the flat top of a rotating cylindrical spindle 10, a frusto conical expandable shell 20 for insertion through the hole 48 into the recess 12 having a largest, unexpanded diameter less than that of the hole 48, a lip 22 at the largest diameter end of the shell 20, of greater diameter than the hole for engaging the disc 40 with the spindle 10 as the shell 20 enters the recess, and a frusto conical expander 30 for insertion into the shell 20 firstly to expand the shell 20 until it is constrained by the recess 12 and secondly, by applying axial force in excess of that required to expand the shell 20 for pressing the lip 22 against the spindle 10, with said excess force to clamp

Abstract: The present disclosure describes a system for detecting very small displacements of an object with respect to a self oscillating piezoelectric crystal by means of acoustic interference at the crystal. Acoustic energy transmitted by the oscillator is reflected by the object, and movement of the latter causes changes in the phase of the reflected energy. Such changes in turn result in variations in the amplitude of the oscillations. An electronic circuit responsive to the last mentioned variations generates output signals indicative of the instantaneous position of the object.

Abstract: A color-copier resistant document is disclosed which includes a repeated invalidating phrase printed on a document, together with a background tone. In addition to having an overlay camouflage tone printed over the entire surface of the document, each of the invalidating images is formed of irregular, smooth-shaped letters which further advance their hiding characteristics. Overall sizes are suggested for the use of the invalidating word VOID, and stroke sizes for each of the letters are also disclosed.

Abstract: The present disclosure describes an electrical connector for use with a printed wiring board. The connector design is characterized by an inner housing of insulative material for supporting a plurality of electrical contacts and an outer insulative structure which encloses the housing and is easily removable therefrom. The latter permits the cleaning of the electrical contacts after a soldering operation and also allows for the replacement of individual defective contacts. Additionally, if required for impedance or electrical interference considerations, the present connector utilizes an integral ground conductor plane which substantially encloses its outer insulative structure and is electrically connected to the ground plane of the printed wiring board.

Abstract: A fault tolerant error correction circuit utilizing any modified Hamming code is disclosed. In addition to correcting single bit errors and detecting double bit errors, the error correction circuit disclosed can tolerate the failure of any single parity check subcircuit without corrupting the information bits of a correct input data pattern. Improved reliability results because a using system will remain UP if there is a single bit error in the input data pattern or faults in a single parity check subcircuit, but not both. If both an error and a fault do occur, the error correction circuit will either report a double bit error or a correct output will be generated with no error indication.

Abstract: Disclosed is a synchronous clock regenerator for generating a clock signal which can be reliably used to strobe a binary serial data signal. The incoming raw clock signal is fed into a tapped delay line which generates multiple delayed versions of the raw clock signal. Upon detection of a framing transition on the incoming data signal, the raw clock signal and multiple delayed clock signals are latched. The latched values are used to address a read only memory (ROM), the ROM containing codes specifying which, if any, of the set including the raw clock signal and multiple delayed clock signals provides the optimum phase to strobe the incoming data signal. The code read from the ROM is decoded, latched and fed to a l-of-n selector circuit.

Abstract: A display panel and method of operating it wherein the panel includes columns of both scan cells and display cells which alternate with columns of only scan cells, and the columns of scan cells are scanned more rapidly than the columns of scan and display cells.

Abstract: A tool is described for facilitating the cutting of printed circuit board wires necessitated by changes in the circuit design or the occurrence of electrical faults. The tool is particularly useful with circuit boards having high density wiring, where it virtually eliminates damage to printed wires adjacent to those being severed. Comprised of a guide pin centrally disposed with respect to an annular cutting edge, the tool uses the former for registration with the component and via holes in the circuit board, and the latter, to sever the printed wires from the electrically conductive pads surrounding the holes. The depth of the cut is carefully controlled by the tool and may be chosen to eliminate electrical faults lying below the surface in a multilayer board.

Abstract: A micro-sequencer allowing multiple decisions to be made in one instant of time is disclosed. A multiplexor array is employed to generate a multiple output condition code from inputted test conditions. The generated condition code is concatenated to a base pointer field of the currently executing microinstruction, and the result is used to address a next state table. The output of the next state table is the address of the microinstruction to be executed next if the then currently executing microinstruction specifies a jump operation.

Abstract: An improved electrostatic ink jet system is disclosed which provides ink upon demand to print upon plain paper. The demand signal is the application of an increased voltage level over an existing or bias level. The termination of this increased voltage level, of course, stops the ink flow to end the printing operation. The ink jet assembly includes an ink jet of reduced length by the inclusion of a conductive surface at a predetermined point along the ink jet length. The assembly therefore has a unique physical shape which provides improved electrical and mechanical characteristics.

Abstract: Photo-optical reproducing, copying/printing apparatus wherein a solid state laser diode is caused to emit a divergent beam of light which is collected and collimated. A cylindrical multi-element lens shapes the beam first in a vertical and then in a second horizontal plane for impingement upon a rotating polygonal mirror assembly. A spherical multi-element lens thereafter focusses the laser beam as scanned by the rotating mirror assembly through a cylindrical lens assembly so as to scan across the surface of a photo receptor drum assembly horizontally, rotatably disposed adjacent to a cylindrical lens producing a latent image on the drum. The scanned image is then electrophotographically developed at the drum by first toning the image and thereafter causing the image to be transferred from the drum to a fuseable item such for example as paper which is adapted to pass across the surface of the drum in contact therewith.