Abstract: A windowing control for a video display includes a programmed controller, a video display including a screen and a raster for scanning the screen, a first memory having a first area for storing data to be displayed in a first window defined on the screen and a second area for storing data to be displayed in a second window on the screen and a second memory for storing the addresses of the data to be displayed in the first and second windows and the transitions between the windows. The controller includes a processor programmed to load data into the first and second memory means and a memory controller for initiating the transfer of data from the first and second memory to a pixel multiplexer. The processor is also programmed to load new address data into the second memory means for each complete raster scan so that the position of the data within the window has the appearance of horizontal (panning) or vertical (scrolling) movement.

Abstract: An analog multiplier is used for generating an output signal that is coupled to a convergence winding of a projection television. The analog multiplier multiplies a horizontal rate sawtooth signal with a vertical rate parabola signal. To prevent temperature related drift, tolerances and component aging from affecting the output signal, the multiplier is calibrated during each vertical blanking interval.

Abstract: A variable length decoder including the cascade combination of a buffer memory for providing parallel-bit coded data in N-bit bytes, and a first barrel shifter having an R-bit input port and an R-bit output port (R>N). The R-bit output port of the first barrel shifter is coupled to respective first inputs of a bank of R two-input OR gates. The outputs of the OR gates are coupled to the parallel input of a register or latch, the output of which is coupled to the address input port of a lookup table for providing decoded versions of variable length codewords applied to its address port, and providing indicia which indicates the length of respective decoded variable length codewords. The output of the register is also coupled to the input of a second R-bit input R-bit output second barrel shifter. The output of the second barrel shifter is coupled to respective second input connections of said bank of OR gates.

Abstract: A fuse including a tubular casing, first and second blade-shaped terminals extending from respective sides of the casing, a short circuit fusible element attached to the first terminal, a heater attached to the second terminal, and a time delay overcurrent trigger mechanism electrically connecting the fusible element and the heater to each other in series in an electrical path between the blade-shaped terminals, the mechanism being connected to receive heat from the heater and to mechanically interrupt the electrical path when the heater heats up under low overcurrent conditions.

Abstract: A display and storage holder for tape cassettes is made up of at least one box-like housing having opposite side, top and bottom walls and a back panel, and being open at the front for receiving therethrough a plurality of the tape cassettes, connectors removably extending across at least the side walls of each housing and each having front and back end portions engageable with the housing for securing the respective connector thereto, a door panel separate from each box-like housing and having side edges and top and bottom edges dimensioned to extend across the front of the housing, dimples in the front end portions of the connectors extending across the side walls, ball-shaped projections on the door panel adjacent one of the side edges and which are relatively tightly engageable in the dimples on the connectors extending across the adjacent one of the side walls for defining a hinge for the door panel, and ball-shaped projections on the door panel adjacent the other of the side edges and which are relative

Abstract: A clamp system for use in a television receiver having tuner and auxiliary video sources, comprises an IF AGC and video detector circuit having an AGC reference voltage input and an auxiliary video input signal clamp circuit having a reference voltage input. The detector circuit and the clamp circuit are each formed on a common integrated circuit along with a video switch for selecting video signals provided by said detector and clamp circuits. The integrated circuit further includes a reference voltage source and a bias generator for deriving the AGC reference voltage and the auxiliary input signal clamp voltage from the common source.

Abstract: A variable control fader with provisions for outputting a fader start signal upon movement of the fader from a position corresponding to the faders maximum attainable resistance value. This fader start signal can be utilized to initiate the activation or deactivation of the operation, or function, of other devices such as, for example, tape recorders, cart machines, or outboard signal processing equipment.

Abstract: An emergency battery system having an infinite shelf life, comprising a first primary reserve, water-activated battery that can be connected directly to an emergency appliance to provide voltage therein once activated, that can be connected to a self-contained, rechargeable battery utilized with the water-activated battery and stored for long periods of time to provide charge to the rechargeable battery, which itself can then be connected to an electrical emergency appliance, or the water-activated battery is connected to a power conversion circuit that can provide a variety of voltages to emergency electrical appliances that already have their own self-contained, rechargeable batteries. The emergency battery system described herein can be used to power emergency appliances, such as lights, lanterns, emergency radios, or DC-powered telephones. As long as the water-activated battery is kept free of moisture or water, the shelf life is virtually infinite.

Abstract: An N-word write access memory is described. Using a variation of conventional control signals RAS, CAS, WE and OE, an innovative scheme of signal protocol allows the N-bit word write memory to have an input/output bandwidth double that attained in the prior art, using substantially the same components and without affecting the bit-width, hence, the pin-count, of the external data bus.

Abstract: An electromagnetic interference filter has an input socket, an insulated base, an insulated upper cover, a metal case, an L-shaped, elongated ground terminal, two short output terminals, a grounded bridge hook, two spring plates and the internal circuit elements. The two spring plates are fitted into openings on the upper and lower surfaces of the metal case which covers the insulated base. An oblique protruding block on either side of the input socket penetrates through a square hole on either side of the metal case to couple the case to the input socket. Upwardly oblique extending spring plates are provided on both of the upper and lower surfaces of the metal case which spring plates are pressed against casing walls to hold the assembly firmly and stably immobilized onto the casing walls.

Abstract: A luminescent screen assembly for a CRT is made by first coating the interior surface of a faceplate panel with a photoconductive layer which overlies a conductive layer. A multiplicity of red-, green- and blue-emitting phosphor screen elements are then deposited in color groups, in a cyclic order, onto the interior surface of the panel. A negative charge is then established on the photoconductive layer. The charge is weakened in the areas where the photoconductive layer underlies the phosphor screen elements, but unaffected in the open areas separating the phosphor screen elements. The charged, open areas of the photoconductive layer are discharged by flood illumination and reversal developed by depositing thereon particles of light-absorptive matrix material having a triboelectric charge of the same polarity as the charge established on the photoconductive layer. The novel process provides a high opacity matrix.

Abstract: A single sheet supplier from a plurality of sheets inserted to reach a pair of inclined corner tabs past a resiliently restrained and under a roller. The roller is selectively rotated to force a paper sheet in contact therewith past the pair of inclined corner tabs which partially and temporarily block the progress of the sheet corners thereby causing them initially to buckle and then snap forward to separate the sheet engaged by the rollers from the remainder of the stack.

Abstract: A temperature compensated vertical rate trapezoidal waveform is produced using piecewise linearization technique. The waveform is applied to a focus electrode of a cathode ray tube to provide a dynamic focus voltage.

Abstract: An oximetry sensor constructed including first and second opposed shell members for engaging the opposite sides of a patient's finger. A coupler releasably connects a pair of LEDs to the first member for projecting light through the finger and a light detector is mounted on the other member for detecting unabsorbed light transmitting through the finger. One of the shell members is mounted for sliding movement on the other for engaging the opposite sides of the patients finger and a coupler retains the shell members in position. In a first embodiment, the LED's are directly releasably coupled to the first member and in a second embodiment a fiber optic cable releasably couples the LED's to the first member.

Abstract: A deflation control system for the pressurized cuff of an automatic blood pressure gauge uses a pressure sensor to control solenoid valves. The solenoid valves are responsive to respective pulse signals having variable duty cycles to change their time-apertures and, thus, their flow rates. The duty cycles of the pulse signals are controlled to maintain a desired constant rate of pressure reduction in the cuff. A microprocessor generates a control value which determines the duty cycles of the pulse signals. This value is proportional to the initial volume of fluid in the cuff and to a predictive term which is provided from a table that is indexed by cuff pressure. This value is then augmented by a feedback term, generated by a feedback control loop to ensure an accurate deflation rate. The gain of the feedback loop is selected so that the feedback correction signals do not interfere with pulse signals modulating the pressure signal. The feedback term is normalized by the initial volume measurement.

Abstract: A computer editing system graphical user interface includes at least one central processing unit (CPU) coupled through appropriate input/output (I/O) circuitry to input devices, such as a cursor control device, and a display device. The CPU is further coupled to a storage device for the storage of data and programs including a database. The database comprises a plurality of source logs indicating a beginning point and an ending point defining all the available source material for the corresponding source log. An output sequence of selected source material is displayed on a timeline as source material blocks, wherein the source material blocks are defined by a head point and a tail point. Through the computer editing system, a user performs a variety of re-editing functions to trim existing source material and to insert new source material on the timeline. When performing a re-edit function, all available source material blocks for a source log selected for re-edit is displayed.

Abstract: A video input signal to be displayed is applied to an offset clamp circuit which effects a DC offset of blanking and active video portions of each video line. The DC offset or shift is of an amount and in a polarity sense to place the black level of the active portion of an NTSC color standard signal at a level corresponding to blanking level of the NTSC color standard. Advantageously, subsequent clamping at the shifted level enables contrast control without altering the black level of displayed images.

Abstract: A composite printed circuit board includes a metal substrate printed circuit section and an insulation substrate printed circuit board section. The metal substrate printed circuit section includes a first layer of a thermally conductive metal for providing high thermal conductivity, and a second layer made of a thermally conductive and electrically insulative material disposed adjacently to said first layer. The second layer has an upper surface upon which electrically conductive wiring may be disposed. The insulator substrate printed circuit board section forms an integral surface with the metal substrate printed circuit section. The insulator substrate printed circuit section further includes a first layer of insulative material, and a second layer of a metallic foil disposed adjacently to at least one side of said first layer of insulative material for forming a conductive wiring layout.

Abstract: A luminance signal filter for use in a multi-source television receiver, includes a tunable filter responsive to a bandwidth control input signal for determining the bandwidth of luminance signals applied to said filter and a variable delay circuit inversely responsive to said bandwidth control input signal for providing a substantially uniform overall delay for said luminance signal filter.

Abstract: A trip distance recorder for a motor vehicle includes a character display and several front panel keys. The recorder stores an operator-definable "trip type" code associated with each key. At the start of a trip, an operator presses one of the keys to select one of the stored codes. The recorder then displays the selected trip type code and elapsed distance for the trip. At the end of the trip, the recorder stores the trip code, distance and date as an entry in a data base maintained in non-volatile memory. The recorder generates printed trip reports based on the information contained in the data base.