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| Number | Title | Issue Date |
| 4890418 | Access panel assembly with door and multi-functional frame An improved access panel assembly including a multi-functional frame which enables the door to be mounted within the frame from either opposing face. Also included is a unique locking mechanism which enables the door to be press-fitted within the frame fr... | 01/02/1990 |
| 4839603 | Multiple-loop microwave frequency synthesizer using two phase lockloops A multiple-loop microwave frequency synthesizer is provided with an upper and a lower phased-lock loop. The phased-lock loops are mutually connected to a novel sampling mixer and their outputs are connected to an up-converter for providing microwave frequ... | 06/13/1989 |
| 4833639 | High-speed analog multiplier--absolute value detector A high-speed analog multiplier circuit for multiplying two analog inputs comprises a signum generator having an X input multiplier and having an output connected to a high-speed electronic switch. A Y analog input multiplicand is also connected to the hig... | 05/23/1989 |
| 4817001 | Method of correcting navigation system errors caused by drift In a two way ranging system of the type employing pseudonoise spread spectrum codes there is provided a method for correcting the navigational system of one of two moving stations in space to compensate for relative drift. The point positions of the two s... | 03/28/1989 |
| 4817113 | Range estimation using floating reference points A method of rapidly reacquiring a pseudonoise spread spectrum coded signal after short outages includes calculating the new positions of the moving stations relative to the old positions of the moving stations and for determining the accurate displacement... | 03/28/1989 |
| 4809295 | Code lengthening system Apparatus and a method of generating very very long pseudonoise (PN) spread spectrum codes is provided where the code is so long that it need never repeat itself during actual use. The transmitter is adapted to start to transmit one set of a plurality of ... | 02/28/1989 |
| 4808939 | Variable rate rectangular matched filter A variable rate near perfect rectangular matched filter is provided with a low pass filter coupled to the input symbol data stream. The output of the filter is coupled to a sampler and the output of the sampler is coupled to an analog to digital converter... | 02/28/1989 |
| 4801900 | Image reject apparatus for signal synthesis applications An image reject apparatus for covering a broad range of signal systhesis frequencies is provided with a digital phase shifter having an input for receiving modulated signals at twice the desired output frequency. A modulator comprising a power divider hav... | 01/31/1989 |
| 4801939 | High-speed data compressor/decompressor for synthetic aperture radar Apparatus is provided for compressing unfocused synthetic aperture radar (SAR) phase history pixel data by coupling the complex inphase phase history data output from the SAR to a first converter/compressor which produces compressed scalar log amplitude d... | 01/31/1989 |
| 4651064 | Video amplifier with foreground and background controls A video display terminal is provided with controls which permit independent adjustment of the background information and the foreground information. Each control comprises an adjustable constant current source connected to one of two branches of a differe... | 03/17/1987 |
| 4646076 | Method and apparatus for high speed graphics fill A method and apparatus for performing high speed graphics fill is provided. Any closed line geometric shape or polygon that can be defined by pixel position is stored in memory. The memory pixel positions are stored in address locations corresponding to r... | 02/24/1987 |
| 4613860 | Coder-decoder for purged binary block codes Transmitting and receiving apparatus for transmitting data includes a purged code encoder at the transmitter for encoding digital data into constant weight unbalanced codewords representative of the digital data. The constant weight unbalanced codewords c... | 09/23/1986 |
| 4600228 | Lockable compliant end effector apparatus A lockable compliant end effector apparatus is useful with a robotic arm for the automated assembly of electronic equipment. The end effector includes a main body portion having first and second ends. A socket is formed in the first end. A first fluid pas... | 07/15/1986 |
| 4599036 | Positive registration compliant apparatus for robotic assemblers The problem of re-establishment of initial precision registration of end-effectors used in automatic robotic assembly following failed insertion attempts is avoided due to a positive registration compliant apparatus having a support member including a bea... | 07/08/1986 |
| 4599570 | Phase detector with independent offset correction A method and apparatus of offset correction which can be applied to control systems, primarily phase-locked-loop systems, and which permits sampling of the error signals for use as an auxiliary input to the system in order to center the error signal aroun... | 07/08/1986 |
| 4595996 | Programmable video display character control circuit using multi-purpose RAM for display attributes, character generator, and refresh memory A video display control circuit, for an intelligent terminal, includes a large cost efficient Random-Access Memory (RAM). A portion of the RAM memory is utilized as a high speed character generator instead of employing a dedicated Read Only Memory (ROM). ... | 06/17/1986 |
| 4590393 | High density gallium arsenide source driven logic circuit A novel high speed gallium arsenide depletion mode field effect transistor logic circuit is provided. One logic input is connected to the source electrode of the switching transistor and draws current when a low level input voltage is provided. Other logi... | 05/20/1986 |
| 4573254 | Apparatus for maintaining electronic component pin alignment An apparatus for maintaining electronic component pin alignment includes a support member having an adjacent lead shear, a stationary nest, a printed circuit board and a component feeder. A component in the component feeder includes a chip having a plural... | 03/04/1986 |
| 4573155 | Maximum likelihood sequence decoder for linear cyclic codes A novel maximum likelihood sequence detector is provided for decoding linear cyclic error correction codes. The detector comprises one cyclic correlator for each two shaft sets of the code which have weights greater than one, and a serial correlator for d... | 02/25/1986 |
| 4561035 | Method and apparatus for clamping and balancing rotatable members A disc is firmly clamped to the end of a rotatable spindle by a coaxial clamping plate spaced from the spindle end by a ring between the plate and disc surface and attached to the spindle by a single coaxial bolt. The flexible plate, thicker at its center... | 12/24/1985 |
| 4559459 | High gain non-linear threshold input Josephson junction logic circuit A high gain Josephson junction logic circuit is provided. The novel circuit comprises a high gain non-linear threshold input Josephson junction logic circuit which is coupled to a high gain Josephson junction amplifier. The high gain input circuit provide... | 12/17/1985 |
| 4551787 | Apparatus for use in cooling integrated circuit chips An integrated circuit chip is cooled by being mounted on a substrate which is urged into contact with a compliant mat which includes a layer having a predetermined array of interconnected metallic pads for spreading heat flux more uniformly. The mat is co... | 11/05/1985 |
| 4548111 | Spiral orbital shear apparatus During the assembly of electronic components on circuit boards, the problems of ductile smear cusps produced on wire ends by traditional scissor-type shearing are addressed by a spiral orbital shear apparatus. This apparatus includes a first fixed plate h... | 10/22/1985 |
| 4544963 | Read signal detection in ternary 3PM magnetic recording Circuitry for distinguishing each value in a read signal magnetically recorded in ternary-3 position modulation in which the values 1, 2 and 0 are detected and equalized into a singlet, a doublet and absence of magnetic flux change. The circuitry first de... | 10/01/1985 |
| 4535420 | Circular-queue structure Apparatus for producing a circular-queue structure which permits interfacing between a high speed mini-computer and a relatively slow speed microprocessor via a common memory and with multi-device, asynchronous handling capability. The structure also perm... | 08/13/1985 |
| 4533624 | Method of forming a low temperature multilayer photoresist lift-off pattern A novel multilayer lift-off pattern of positive and negative photoresist materials is provided. A positive first layer is deposited on a substrate and flood exposed before a subsequent layer of negative photoresist material is added on top of the positive... | 08/06/1985 |
| 4529324 | Spindle bearing follower This invention is a device to reduce the wobble of a rotating shaft disposed in a cavity of a housing which wobble results from a spurious or undesirable positioning of a bearing assembly in which the shaft rotates. The present device includes a bearing f... | 07/16/1985 |
| 4528648 | Memory management system A unique memory management system for use with a memory device which is common (or shared) with a plurality of user elements utilizing a memory address counter, scratch pad address memory, external memory address inputs and an address multiplexer.... | 07/09/1985 |
| 4510683 | Force assembler apparatus for robots A programmable force assembler for robots includes a bi-directionally actuatable slide member. A microprocessor is programmable for controlling insertion force independent of the distance moved by the slide member. A position indicator transmits slide mem... | 04/16/1985 |
| 4509146 | High density Josephson junction memory circuit A superconductive Josephson junction high density memory array is provided. Each memory cell in the array comprises a two branch superconducting interferometer storage loop which has only a single Josephson junction device in one of the branches. The Jose... | 04/02/1985 |
| 4507834 | Drilling monitor A drilling monitor employs laser optics and an associated signal processing device to provide intelligent control capable of making the optimum decision to maintain hole quality and maximize drill life during the drilling of via holes in a circuit board. ... | 04/02/1985 |
| 4506236 | Composite filter/differentiator There is shown and described a relatively simple electronic circuit using few discrete components which is used to replace the filter and delay line differentiator in existing circuits. The new circuit provides a simultaneous output of even and odd signal... | 03/19/1985 |
| 4506252 | Ternary data encoding system Apparatus and method for encoding binary data in a ternary format including ternary 0, ternary 1 and ternary 2 code symbols. In a preferred embodiment of the invention utilized for magnetic data storage, a ternary 0 is represented by the absence of signal... | 03/19/1985 |
| 4501975 | Josephson junction latch circuit A Josephson junction latch circuit is provided which has an AND gate having plural inputs and a single output. The output of the single AND gate is directly coupled to a Josephson junction flux storage loop capable of storing flux indicative of the output... | 02/26/1985 |
| 4499736 | Dehumidifier apparatus for disk drives A dehumidifier for a head-disk assembly in a disk drive unit. The dehumidifier includes a housing which is ported to define an air passage therethrough. Within the passage is a Peltier effect device that has a cold surface exposed to air flowing within th... | 02/19/1985 |
| 4498546 | Apparatus for limiting electromagnetic interference radiation The reduction of electromagnetic interference radiation from electrical component housings is enhanced due to an electrically conductive adapter rings each connected to associated electrically conductive cable shields. The rings and cables are engaged and... | 02/12/1985 |
| 4496648 | Method of making high reliability lead-alloy Josephson junction During the preparation of a Josephson junction device, one of the steps for making a base electrode is to deposit a superconducting material on a substrate and to anneal the deposited material to make it a continuous homogeneous polycrystalline grain-like... | 01/29/1985 |
| 4496856 | GaAs to ECL level converter An improved high speed gallium arsenide (GaAs) to emitter coupled logic (ECL) voltage level converter is provided which consumes less power and also provides an improved speed-power product performance characteristic. The converter includes a three branch... | 01/29/1985 |
| 4494948 | Air controlled paper stacker Apparatus is disclosed for stacking a continuous paper form having uniformly positioned folds or seams as it exits from a device such as a printer. It utilizes a pair of curved surfaces over which an air flow is alternately directed to alternately create ... | 01/22/1985 |
| 4494192 | High speed bus architecture There is shown and described a high speed bus architecture which uses a common control bus and permits high speed data transfer between a plurality of active and/or passive users while reducing the system overhead structure which was previously required.... | 01/15/1985 |
