Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 4163263 | Method and apparatus for tape recording time-spaced segments of video information from a video camera A video recording technique for recording sequential scenes or segments of video information, such as from a video camera, in such a manner that the recorded scenes may be reproduced without loss of synchronization. In a video tape recorder of the longitu... | 07/31/1979 |
| 4163264 | Noise improvement by capacitor bank in magnetic recording and playback apparatus A magnetic recording and playback apparatus adapted to decrease tape hiss noises, wherein an amplifier power supply circuit or an output circuit for coupling an output from a recording amplifier to a magnetic head is provided with a capacitor block whose ... | 07/31/1979 |
| 4163265 | Magnetic disc memory and magnetic disc for this memory A magnetic disc memory having a device for positioning a magnetic head on a track. A disc is sub-divided into sectors comprising groups of data tracks and, alternating therewith, sectors having groups of servo tracks which define the data tracks which are... | 07/31/1979 |
| 4163266 | Magnetic tape scanning assembly for use in video tape recorder and playback apparatus Guiding drums for a magnetic tape scanning assembly for use in a video tape recorder and playback apparatus are made of a specific aluminum-silicon alloy consisting essentially of 8 to 15% by weight of silicon, 1 to 4% by weight of copper, 0.05 to 0.6% by... | 07/31/1979 |
| 4163267 | Flying head with compound-foil Disclosed is a novel rigid flying head presenting a "compound-foil" face to a passing flexible record segment which is induced to automatically assume a prescribed, relatively controlled "approach zone" and associated constant spacing relative to the head... | 07/31/1979 |
| 4163268 | Circuit arrangement for monitoring readiness for operation of actuating devices of a safety apparatus for vehicles A circuit monitors the operational readiness of the trigger arrangement in a safety device that protects passengers in a vehicle, for example, the ignitors which inflate the air bags of a vehicle in response to an actual or impending collision. The trigge... | 07/31/1979 |
| 4163269 | Ground fault and fire detector system A ground fault and fire detector system for an A.C. electrical power distribution apparatus including a multi-pole circuit interrupter to disconnect a poly-phase electrical power supply from a load. A single-pole circuit device is operatively connected to... | 07/31/1979 |
| 4163270 | Safety apparatus for use with a three-phase AC motor Safety apparatus for use with a three-phase AC hoist motor adapted to be connected to a three-phase AC power source, motor rotation being correct if the motor is connected to the source in correctly phased relationship but incorrect if connected with an i... | 07/31/1979 |
| 4163271 | Electronic switching apparatus An electronic switching apparatus comprising an elongate device having an opening in one end thereof for receipt of an electric conductor therethrough, a transformer winding surrounding the opening within the device such that a voltage will be induced in ... | 07/31/1979 |
| 4163272 | Arrangement for arc-quenching in arresters An electrical arrester structure includes an arc quenching chamber in which are located a pair of spaced principal electrodes between which a quenched arc gap is formed, an associated blow-out coil for magnetically influencing and expanding the arc formed... | 07/31/1979 |
| 4163273 | Corona discharge apparatus and method having means for improved mounting of corona discharge wire There is provided a corona filament assembly which is characterized by parallel rails each having a plurality of binding posts secured thereto. Each post is formed of a button about which the filament turns and having a lip spaced from the rail and an O-r... | 07/31/1979 |
| 4163274 | Unified chassis for a two-way radio A base station radio chassis has upper and lower compartments for receiving the transmitter and receiver modules, respectively, therein. Electrical interconnections between the two modules are established by a centralized "mother" board. A unique chassis ... | 07/31/1979 |
| 4163275 | Converter means for vehicle light Converter means for converting a side marker light for a vehicle such as a trailer to a combination side marker and clearance light comprises an adapter assembly for repositioning the ligh bulb and a multi-sided translucent lens for replacing the original... | 07/31/1979 |
| 4163276 | Lighting means, especially headlights of vehicles Headlights for vehicles, especially such which are to be subjected to rough treatment have a casing of resilient and yielding material. The casing is cup shaped and near its edge, at the open side of the cup, an annular groove is provided destined to hold... | 07/31/1979 |
| 4163277 | Spotlight An axial spotlight system, including an axially mounted arc lamp in an ellipsoidal reflector. The usually associated thermal problem at the forward terminal of the lamp is eliminated by a metal mounting frame which connects the terminal to the reflector a... | 07/31/1979 |
| 4163278 | Voltage supply circuit responsive to plural possible DC input levels A voltage supply circuit comprises an input for receiving a DC input voltage having one of plural possible levels; a DC-AC inverter for inverting the DC input voltage and which includes a boosting transformer having a winding with end terminals and an int... | 07/31/1979 |
| 4163279 | Derivative minor loop type controller A controller for controlling a controlled system in connection with detecting means which detects the output of the controlled system and feedbacks a corresponding detected signal to the controller. The controller comprises proportional amplifying means f... | 07/31/1979 |
| 4163280 | Address management system An address management system includes a central processing unit (CPU) and an address management unit arranged between a direct memory device (DMA) and a main memory unit to control memory access from the CPU and DMA. Segment registers for address expansio... | 07/31/1979 |
| 4163281 | Method and apparatus for the rotation of a binary-data matrix, intended particularly to be used as a storage unit having a two-way access mode for electronic computers This invention relates to a method and apparatus for rotating a binary-data matrix, more particularly to a storage unit for computers which allows the matrix to be rotated to obtain row-wise and column-wise access. According to the invention the bits of t... | 07/31/1979 |
| 4163282 | Electrical control method and apparatus for combustion engines In a method and apparatus for controlling a combustion engine, a digital computer repetitively and sequentially calculates first and second values corresponding to the proper settings or actuation of first and second control devices that are used to contr... | 07/31/1979 |
| 4163283 | Automatic method to identify aircraft types Two sensors spaced at a known separation produce signal pulses when activated by the wheels of a taxiing aircraft. The signals are transmitted to a processor in which the wheelbase of the aircraft can readily be calculated. Since specific aircraft types h... | 07/31/1979 |
| 4163284 | NC tape producing system A program for operating a numerical control machine tool written in problem oriented language is translated into machine oriented language through the use of the present NC tape producing system. The present system has a mini-computer mounted in a desk ty... | 07/31/1979 |
| 4163285 | Control circuit for metal paper printer head Control circuit for a print head of a metal paper printer in which electrodes are arranged on a slope, said electrodes being staggered in horizontal projection by the D-fold of their electrode width. The martrix-like structurized character to be printed c... | 07/31/1979 |
| 4163286 | Digital plotting system for displaying straight line information A digital plotting system for displaying straight line information. This tem employs a long vector to describe a long straight line on a graph that starts from any point, extends in any direction and has a specific length. The direction is implemented by... | 07/31/1979 |
| 4163287 | Binary multiplier circuit including coding circuit A binary multiplier circuit wherein the product is expressed in coded form as soon as the linear (or non-coded) product is produced. When a twelve-bit binary number is multiplied by another twelve-bit binary number a twenty-four bit binary number is produ... | 07/31/1979 |
| 4163288 | Associative memory A high capacity associative read/write memory is provided which includes storage means which can be read from or written into and having memory units of equal capacity each containing an equal and predetermined number of levels. Addressing means are coupl... | 07/31/1979 |
| 4163289 | Sixteen bit microcomputer memory boards for use with eight bit standard connector bus A microcomputer system uses a standardized S-100 bus with eight bit Data In and eight bit Data Out lines, but has a sixteen bit microprocessor with sixteen bit bidirectional data input/output terminals. An arrangement of mirror image pairs of eight bit wi... | 07/31/1979 |
| 4163290 | Holographic verification system with indexed memory A verification system utilizing a holographic memory defined by a multiplicity of individual holograms on a photographic strip arranged side by side in elongate, parallel, hologram channels of substantially equal length. A holographic index on the strip i... | 07/31/1979 |
| 4163291 | Input-output control circuit for FIFO memory In transmitting data between a plurality of sequentially connected FIFO type memory elements by controlling a binary coded signal a circuit element is provided in a manner to correspond to each memory element, so as to indicate a data storage state. A cir... | 07/31/1979 |
