Abstract: A method of and an apparatus for conditionally bypassing the error correction function of a large scale integrated (LSI) semiconductor random access memory (RAM) is disclosed. A content addressable memory (CAM) is utilized to store the addresses of the addressable locations in the RAM in which an error was previously detected, and on each memory reference both the CAM and the RAM are simultaneously referenced by the same address. Upon a memory reference, the read data from, i.e., the date read out of, the RAM is concurrently coupled directly to an Interface Register and directly to the error detection and correction circuitry (ECC) and thence to the Interface Register. If the CAM does not contain the address, the read data that is coupled to the Interface Register is gated out at a first relatively early gate pulse. However, if the CAM does contain the address, the corrected read data from the ECC is then gated out of the Interface Register at a second relatively later gate pulse.

Abstract: A circuit for receiving an incoming RF signal incurring frequency drift and producing a local signal for tracking the incoming signal includes a phase-locked loop and means incorporated in the loop which compensate or correct for the frequency drift so as to maintain the loop locked on the incoming signal. The loop is defined by a phase detector, a DC amplifier and a voltage controlled oscillator connected in series. The correction means is coupled in parallel with the loop amplifier between the loop detector and amplifier at its one end and between the amplifier and a DC bias voltage supply terminal for the amplifier at its opposite end.

Abstract: Disclosed is an apparatus for and a method of propagating bubble domains along fixed guidance channel forming stripe domains by capturing them in moveable stripe domains and then moving the capturing moveable stripe domains. The memory plane comprises a non-magnetic Gadolinium Gallium Garnet (GGG) layer which is a supporting substrate upon which are successively formed by the liquid phase epitaxy (LPE) method: a first stripe domain layer, a first non-magnetic spacer layer; a bubble domain layer; a second non-magnetic spacer layer; a second stripe domain layer; and a third non-magnetic spacer layer upon which is formed the necessary propagation circuitry.

Abstract: An apparatus for and a method of propagating bubble domains is disclosed. The apparatus includes a memory plane that is comprised of a non-magnetic support member upon which are formed a bubble domain layer and at least one stripe domain layer. The stripe domain layer has a set of relatively-narrow, periodic, potential well generating fixed stripe domains provided therein while the bubble domain layer has a set of relatively-wide, parallel, potential well generating fixed guidance channels provided therein that are oriented orthogonal to the parallel set of stripe domains in the stripe domain layer. Bubble domains are concurrently entered, in parallel, at one end of the memory plane in selected ones of the guidance channels. A periodic amplitude modulated bias field of frequency F propagates each of the bubble domains along the associated guidance channel from adjacent to next downstream adjacent stripe domain and thus through the memory plane at the frequency F.

Abstract: An apparatus for and a method of providing error correction of the address word of a cache memory system (CMS) utilizing post-write storage of the least recently used (LRU) block of data words. Error correction circuitry (ECC) is provided at the output of the address buffer (CAB) portion of the cache memory system so that the address word that specifies the addressable location in the main storage unit (MSU) into which the block of data words, which block of data words is stored in the data buffer (CDB) portion of the cache memory, is to be stored or written-back is error corrected upon readout. This error correction of the address word ensures that correctable errors in the address buffer provided address words do not generate a Miss signal by the storage interface unit (SIU) which, in turn, requires a MSU reference even though the desired address word and the associated data word are available in the cache memory system.

Abstract: A display system for providing a real-time, dynamic presentation of an analog signal waveform is disclosed. The system includes an A-D converter that is coupled to a 1-out-of-M decoder that, in turn, drives a serial string of bubble domain generators. The bubble domain generators generate moving columns of bubbles, the heights of the columns representing the amplitudes of the analog signal waveform at each of the associated sample times. The bubble domain memory plane is of a construction to permit the columns of moving bubbles to appear as moving columns of bright spots when seen by an observer utilizing a plane polarized light beam and an analyzer.

Abstract: This invention relates to a right justified mask transfer apparatus which may be effectively utilized in a digital data computer. A right justified mask transfer register is provided which holds the result of a logical bit-by-bit ANDing of a multi-bit data word with a multi-bit mask work such that only those bit positions for which the mask word are of a predetermined binary significance are collected contiguously in the mask transfer register, all other bit positions being ignored. Further operations on intermediate digital data computations may be more easily performed by utilizing the right justified mask transfer function to select certain data bits or fields.

Abstract: A method of and an apparatus for determining the best match, i.e., minimum Hamming distance, between a search word and a plurality of file words is disclosed. The method involves simultaneously comparing the search word to a file word and to a match word. If the comparison indicates that the file word is a better match than the match word, the file word becomes the match word and the next file word is compared to the new match word. The operation continues until all the file words have been operated upon such that the last match word becomes the best match word.

Abstract: A solid state apparatus for and a method of (1) coupling a light beam to a dielectric waveguide, (2) modulating the intensity of the coupled, diffracted light beam, and (3) multiplexing the coupled, diffracted light beam within the waveguide to any one of several detectors. The apparatus uses a liquid-phase epitaxially (LPE) grown film of bismuth substituted rare earth iron garnet to form a magnetizable layer in which stripe domains may be generated, sustained and moved about. The stripe domains from a diffraction grating, the stripe domain width and orientation of which may be altered by the application of external magnetic fields--see the E. J. Torok, et al., U.S. Pat. No. 3,752,563. The altered stripe domains are, in turn, utilized to alter the coupling of the light beam to the waveguide and to alter the direction that the coupled, diffracted light beam is directed within the waveguide.

Abstract: A dual channel signal detector circuit comprising an equalizer for responding to a variable peak amplitude input signal, in which the peaks are representative of data, so as to provide a substantially constant peak amplitude output signal having discrete data representative pulses spaced along a base line, which is substantially flat at the zero level in regions intermediate the pulses, for application to separate peak detection and amplitude detection channels. The peak detection channel produces data pulses each indicative of the relative time occurrence of the peak of a respective data representative pulse while the amplitude detection channel is triggered by signal levels of the data representative pulses exceeding a predetermined threshold to produce gating pulses for gating the data pulses to the circuit output substantially exclusive of any noise that may be present at the input of the circuit.

Abstract: The present device incrementally adds or subtracts power units to and from a heating or cooling system and employs a major control board into which are plug-connected a plurality of minor control boards. The minor control boards have varying designs. Some are designed to accept different signals from different types of temperature monitoring means and are designed to convert those different signals into common command signals, while other minor control boards are designed to accept those command signals in order to communicate with and control yet others of said minor control boards to effect a turning on and/or turning off of said heating or cooling power units according to at least two different modes of operation. The major control board provides a power source for the minor control boards and provides the circuit paths to enable the minor control boards to transmit signals among any set of such mounted boards.

Abstract: A plurality of data tracks, each formed of a strip of isotropic magnetic film, i.e., having substantially zero uniaxial anisotropy, are configured into a cross-tie wall memory system. Each of the data-track-defining-strips of isotropic magnetic film utilizes its shape, i.e., its edge contour induced anisotropy, rather than its easy axis magnetic field induced anisotropy, to constrain the cross-tie wall within the planar contour of the film strip. The use of the shape induced anisotropy of the isotropic strip of magnetic film permits the use of nonlinear, i.e., curved, data tracks. The curved data tracks are configured into major loop, minor loop cross-tie wall memory systems that were not permitted by the prior art magnetic field anisotropic magnetic film. The stray field from a cross-tie wall in a minor loop helps to nucleate Neel segments in a Neel wall in the major loop thus replicating data from the minor into the major loop.

Abstract: A plurality of data tracks, each formed of a strip of isotropic magnetic film, i.e., having substantially zero uniaxial anisotropy, are configured into a cross-tie wall memory system logic gate. The data-track-defining-strip of isotropic magnetic film utilizes its shape, i.e., its edge contour, induced anisotropy, rather than its easy axis magnetic field induced anisotropy, to constrain the cross-tie wall within the planar contour of the film strip. The use of the shape induced anisotropy of an isotropic strip of magnetic film permits the use of nonlinear, i.e., curved, data tracks. Two input and one output data tracks are configured into an AND/OR logic gate to permit the cross-tie wall memory system to perform both memory and logic functions.

Abstract: The design of a magnetic film strip for defining the data track of a cross-tie wall memory system is disclosed. The design involves the conformation or shaping of the opposing edges of the film strip into repetitive, rounded, asymmetrical serrated edge contours. The serrated edge shape structures the cross-tie of each cross-tie, Bloch-line pair at the narrowest width dimension across the film strip while the Bloch-line is positioned at the widest width dimension across the film strip or at the round, convex, portion of the repetitive serrated edge shape. The asymmetrical, rounded edge contour is substantially in alignment with the natural contour of the magnetization that is oriented around a Bloch-line that is positioned on the cross-tie wall, which cross-tie wall is aligned along and superposed the geometric centerline of the film strip.

Abstract: The present device includes a plurality of shim-like members which are fastened at one end through a stud, or an elongated bolt, or a riveted assembly to a baseboard and are free to rotate about the stud, bolt or rivet. The shim-like members can be moved into and out of a stacked arrangement with other shim-like members which in effect raises or lowers the top of the stack. A stack of said shim-like members can be located under one of the legs of a ladder (or both legs, if two stacks are used) in order to enable the rungs of a ladder to be level with respect to the ground or some other base.

Abstract: A method of and an apparatus for performing, in a Cache memory system, the Priority determination of what Requestor, of R Requestors, is to be granted priority by the Priority Network while simultaneously comparing, in parallel, all of the R Requestors' addresses for a Match condition in R Cache memories. The Cache memory system incorporates a separate Cache memory or associative memory for each Requestor, each of which Cache memories is comprised of an Address Buffer or Search memory, in which the associated Requestors' addresses are stored, and a Data Buffer or Associated memory, in which the data that are associated with each of the Requestors' addresses are stored. Thus, while the Priority Request signals from all of the requesting Requestors are being coupled to the single Priority Network, each of the requesting Requestors' addresses is coupled to each of the requesting Requestor separately associated Cache memory.

Abstract: The present system provides a means to record an image of an item which is extremely difficult to inspect because of its peculiar shape or because the person who is inspecting it cannot come in close proximity thereto, such as red hot glass being measured for form and size immediately upon being formed into a bottle. The present system employs a television camera and logic circuitry to electronically compare the profile of said image against a standard item whereby the item being inspected or measured can either be rejected or accepted.

Abstract: The present device is a high reliability resistor comprising a sheet of metal foil secured to the flat side of a substrate and with the opposite side of the substrate formed to dissipate heat into the ambient thus enabling the present resistor to have an improved temperature coefficient of resistance (TCR) and further enabling the resistor to function satisfactorily in a high wattage mode.

Abstract: In a process for incinerating liquid, gaseous or pasty waste, the steps of producing a high frequency vibratory flow of a fluid in a pulverzing chamber, introducing the liquid, gaseous or pasty waste into the chamber to be pulverized in said high frequency vibratory fluid flow, providing combustion air to be drawn into said high frequency vibratory flow to be mixed with said pulverized waste and igniting the mixture of pulverized waste and combustion air. In addition the present arrangement provides a chamber in which waste material is pulverized. The chamber is equipped with first aperture means and second aperture means. Within the chamber and disposed to face said first aperture is a cavity resonator so that when high pressure fluid passes through said first aperture there results a high frequency vibratory flow of said fluid.

Abstract: The present device is a refuse incinerator and includes a combustion chamber, a primary source of air disposed to provide first air to said chamber to effect a first combustion therein; an escape orifice for combustion gases, resulting from the combustion of refuse, provided in at least one of the walls of said chamber; means for supplying pre-heated air from a second source into said combustion chamber in a direction substantially opposite to the direction along which combustion gases with particles suspended therein, from said first combustion, pass toward said escape orifice.