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Assignee: Burroughs Corporation


Location: Detroit, MI
No. of patents: 1155

1                      
NumberTitleIssue Date
5051978Coated media for optical recording
Recording media for recording information "bits" in response to activation of a laser beam, the media including a recording layer adjacent a "soft pad" layer above and/or below (e.g., a vacuum-evaporated reconstituted fluoropolymer), especially as a "soft...
09/24/1991
4772144Ribbon cartridge having removable capstan
A ribbon cartridge for use with a printer is disclosed having a removable capstan. The removable capstan may be interchanged with other capstans having different circumferences and configurations for engaging printer drive mechanisms of different printers...
09/20/1988
4744024Method of operating a bus in a data processing system via a repetitive three stage signal sequence
Disclosed is a data processing system which is comprised of a plurality of devices that carry on conversations with each other over a time-shared bus. These conversions can consist of a message from a device A to a device B which is immediately followed b...
05/10/1988
4720779Stored logic program scanner for a data processor having internal plural data and instruction streams
A program scanner for a processor having multiple internal streams of instruction and data flow scans a sequence of incoming codes, and employs a plurality of rams to detect various types of syllables in that code. The contents of these rams are signals i...
01/19/1988
4704679Addressing environment storage for accessing a stack-oriented memory
An address environment storage unit for a stack-oriented data processor for operating in data sets arranged as structured blocks, or nested pushdown stacks. The address environment storage employs a plurality of sets of display registers such that the cur...
11/03/1987
4703984Flexible access connector with miniature slotted pads
A flexible thin film provides interior miniature conducting contact pads which mesh with the extension pins of a pin grid array to establish a tensioned reliable electrical contact. These contacts each connect to an exterior point which is available for p...
11/03/1987
4686691Multi-purpose register for data and control paths having different path widths
A multi-purpose register formed of various cells of a customized integrated circuit gate array chip having input gate cells, multiplexor cells, flip-flop cells and output gate cells. The flip-flop cells may be segmented into registers of different widths ...
08/11/1987
4683968System for preventing software piracy employing multi-encrypted keys and single decryption circuit modules
A system which enables a protected program to run only a selected plurality of computers includes a respective unique key Ki for each computer of the plurality, the key being triple encrypted in the form EFK [EKi [EFK [Ki]...
08/04/1987
4683465Data display terminal using a flat display panel
A data display terminal comprises a flat display panel assembly pivotably secured to a base by means of a friction sleeve and a torsion spring so that the display panel assembly can be pivoted with respect to said base and can be held at any selected angu...
07/28/1987
4682039Photoelectric tape profile detector for file security
Disclosed is a method and apparatus whereby each time a tape is wound upon a prescribed reel, the winding pattern may be assumed to leave the array of tape edges in a unique "edge profile" represented by the position of each winding edge as viewed from on...
07/21/1987
4676564Access device unit for installed pin grid array
A flexible thin film plastic access unit for placement under a pin grid array installed on a printed circuit board. The access unit provides extending exterior flaps having probe-accessible contact pads which connect electrically to each one of the unders...
06/30/1987
4677566Power control network for multiple digital modules
A power network control system has a plurality of digital modules interconnected. A master logic unit in the network communicates with a specialized protocol to slave logic units in each module. The slave logic unit can instruct a power control circuit to...
06/30/1987
4673100Equipment enclosure fastening means
Disclosed is an equipment enclosure allowing service personnel easy access to equipment housed within the enclosure. The enclosure employs two case portions, each provided with a respective plurality of mating catch mechanisms for holding the two case por...
06/16/1987
4674076Optical memory system having improved positioning and focusing control circuitry
An optical storage system employing a laser beam which is directed and focused onto an optical disk for reading and/or writing data in a track of the disk. Positioning control is achieved by providing for track following and track seeking using a pluralit...
06/16/1987
4674004Parallel-flow air system for cooling electronic equipment
The present disclosure describes an air cooling system which has the ability to maintain acceptable temperature levels in present day high density electronic equipment. More specifically, the system provides an arrangement whereby each printed circuit car...
06/16/1987
4670803Partitionable record pack
Improved disk pack media for data storage is illustrated as comprising a pack of flexible magnetic recording disks which may be partitioned "end-wise". In one embodiment the disks are perforated for partitioning and also stacked in a different respective ...
06/02/1987
4669029On and under counter housing for electrical components
The present disclosure describes a housing module characterized in that it may be readily slid onto a counter-like unit which provides support therefor. The module finds particular application in the housing of electrical components, wherein the latter ma...
05/26/1987
4669074Focusing control circuitry for an optical memory system
An optical storage system employing a laser beam which is directed and focused onto an optical disk for reading and/or writing data in a track of the disk. Proper focusing is maintained using focusing control circuitry which produces a focus error signal ...
05/26/1987
4665536Programmable automatic power-off system for a digital terminal
A programmable unit for attachment to a work-station whereby power to the work-station will be shut off after a pre-set time-period, unless work-station activity occurs before the outset of the time-period, when the pre-set time-period will initiate again...
05/12/1987
4664252Hub assembly
A scrub wheel is provided in document processing equipment where a wheel is removable and replaceable. The wheel is held between a base member and a top member where the top member comprises retaining lugs at the distal ends of retention arms which engage...
05/12/1987
4663539Local power switching control subsystem
Each digital module in a network is provided with a local power switching control subsystem wherein the local module uses a local power switching control logic card which controls main power and subordinate power units in a predetermined sequence. Power u...
05/05/1987
4661886Magnetically sealed multichip integrated circuit package
A magnetically sealed integrated circuit package includes a substrate having a cavity for holding multiple integrated circuit die, a lid for covering the cavity to protect the die, a ferromagnetic seal ring which is fixed to the substrate around the die, ...
04/28/1987
4660330Bevel tool
Described is a novel "bevel tool" and associated technique for holding prescribed magnetic head workpieces and placing them in prescribed constant angular relation with a rotary lapping means; this tool preferably including a workpiece-receiving pocket ad...
04/28/1987
4658353System control network for multiple processor modules
A system for controlling communication in a network of digital modules where each digital module has a maintenance processor which connects the digital module through a network bus to every other digital module's maintenance processor. Each transmitting m...
04/14/1987
4657602Integrated complementary transistor circuit at an intermediate stage of manufacturing
An integrated complementary transistor circuit at an intermediate stage of manufacturing comprises a semiconductor substrate having dopant atoms of a first conductivity type and having a substantially flat major surface; a patterned layer of material that...
04/14/1987
4655368Autoteller exchangeable banknote cassette system
An autoteller accepts on a ramp exchangeable banknote cassettes which can only be opened at the predetermined angle of the ramp when a key assembly on the ramp is presented to a lock. The cassettes may only have the key assembly presented to the lock when...
04/07/1987
4654892Electro-optical system using light modulation
An electro-optical system includes a phototransistor having collector and emitter electrodes and adapted to receive modulated light representing data and generating current in a current flow path representative of the received light. A load is placed in t...
03/31/1987
4654538Dual input voltage power supply
A power supply circuit including A.C. input of either 110 volts or 220 volts coupled to a full diode bridge, across the output of which are provided series connected capacitors across which the desired system operating voltage appears. A voltage-controlle...
03/31/1987
4654102Method for correcting printed circuit boards
A method and apparatus are shown for use in adding electrical connections to existing printed circuit boards. To this end, apparatus in the form of a multilayered pad is provided which has an adhesive layer over at least part of one face which is responsi...
03/31/1987
4654780Parallel register transfer mechanism for a reduction processor evaluating programs stored as binary directed graphs employing variable-free applicative language codes
A parallel register-transfer mechanism has been disclosed above for use in the evaluation of expressions of a variable-free applicative language stored as binary directed graphs. The expression is reduced through a series of transformations until a result...
03/31/1987
4650178Self-aligning document stacker
A document stacker assembly including a plurality of document stackers each having a bin wherein documents are selectably stacked against a bin wall member. A belt moves documents along a document track and an idler wheel is pressed against the belt in ea...
03/17/1987
4648737Theft prevention apparatus
Means for coupling together two assemblies wherein each assembly includes a hole in which a bracket can be inserted, with the brackets being held together by a lock. Additionally, the assemblies are coupled together by a rotatable locking plate which cann...
03/10/1987
4649472Multi-phase subroutine control circuitry
Multi-phase subroutine control apparatus for use in a data processing system which provides for the concurrent execution of a plurality of tasks in a multiprogramming and multiprocessing environment. Subroutine control operations are staged so as to share...
03/10/1987
4647852Contact probe assembly
The present disclosure describes an assembly which has particular application in the testing of printed circuit boards. More specifically, the assembly is comprised of an apertured holding plate which is registered with the board under test, and a probe s...
03/03/1987
4647850Integrated circuit for measuring mask misalignment
An integrated circuit for measuring conductor misalignment comprises: a set of 2n+1 conductor pairs where n is a predetermined positive integer; each conductor pair includes a U-shaped conductor having a central axis; each conductor pair also includes a r...
03/03/1987
4647925Circuit employing intercoupled state machines for transmitting and receiving multiformatted sequences of voice and data characters
A circuit which operates on input signals representing multiformatted sequences of idle characters, voice characters, and data characters comprises: a first state machine consisting essentially of a logic array, a register, and a counter. One section of t...
03/03/1987
4646231Method of synchronizing the sequence by which a variety of randomly called unrelated activities are executed in a digital processor
A method of synchronizing the sequence by which a variety of unrelated activities are executed in a digital processor when the activities are randomly called by multiple callers includes the steps of: providing a single processor queue for holding respect...
02/24/1987
4644464Graph manager for a reduction processor evaluating programs stored as binary directed graphs employing variable-free applicative language codes
A parallel register-transfer mechanism and control section have been disclosed above for use in a reduction process for the evaluation of expressions of a variable-free applicative language stored as binary directed graphs. The expressions are reduced thr...
02/17/1987
4644463System for regulating data transfer operations
A peripheral-controller (called a Data Link Processor) optimizes the rate of data transfers between a host computer and magnetic tape peripherals by use of a block counter sensing system for monitoring the occupation-status of word-blocks in a buffer memo...
02/17/1987
4643935Epoxy-glass integrated circuit package having bonding pads in a stepped cavity
An integrated circuit package comprises a plurality of thin flat epoxy-glass layers which are arranged in a stack and are laminated together by prepreg layers that lie between the epoxy-glass layers. This stack has a cavity which is staircase-shaped and e...
02/17/1987
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