Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 4627004 | Color image recording system and method for computer-generated displays A high spatial and dynamic resolution color image recording system and method for computer generated displays includes a low cost personal computer having a low resolution display monitor adapter and a photographic image recorder coupled to receive low re... | 12/02/1986 |
| 4613056 | Seed meter having cleanout and seed sealing member In a seed meter in which a seed disk having a circular outer edge is rotatably mounted on a hub within a generally cylindrical housing, an elongated cleanout and seed sealing member mounted within the housing adjacent a substantial portion of the circumfe... | 09/23/1986 |
| 4610860 | Method and system for producing carbon fibers High tensile carbon fibers are provided with a high yield process in which, after oxidation of a precursor, the fibers are first precarbonized in an inert atmosphere to to about 600° C. while imparting 5-10% stretch. In precarbonizing, the fibers are ini... | 09/09/1986 |
| 4608370 | Skin formulation Skin treating composition comprising about 3 to about 7 parts salicylic acid, about 8 to 12 parts resorcinol, about 8 to about 12 parts lactic acid, and about 60 to about 90 parts ethyl alcohol, by weight. The composition is applied to the face, and after... | 08/26/1986 |
| 4601372 | Automatically engageable and disengageable drive coupler mechanism An automatically engageable and disengageable drive coupler mechanism is provided in which separate drive and driven couplers are automatically coupled to and uncoupled from each other simply by moving the couplers into and out of contact with each other ... | 07/22/1986 |
| 4600457 | Method and resin solution for splicing carbonized polyacrylonitrile material A method is provided for splicing carbonized PAN tows in which the tows to be spliced are cut square and coated at the ends thereof with a resin solution, following which the coated ends are joined together, heated so as to cure the resin solution and the... | 07/15/1986 |
| 4600122 | Seed meter disk for use with sunflower and other seeds of long, slender shape In a seed meter in which a pressure differential is utilized in conjunction with a rotating seed disk having a circumferential row of seed cells therein to pick up individual seeds from a seed mass and deliver the seeds to a seed discharge area, the seed ... | 07/15/1986 |
| 4599574 | Selectable gain instrumentation amplifier A high accuracy selectable gain instrumentation amplifier system which avoids amplifying signal distortions produced by gain selection switches includes a high gain amplifier having an input coupled to receive a system input signal and a feedback signal a... | 07/08/1986 |
| 4599125 | Method and system for forming sheet material into apertured shapes A method and apparatus for providing apertured elements such as reinforcing rings having precisely defined edges without tearing or distortion operates on an elongated strip of first and second sheet material held together by a detachable adhesive. Both p... | 07/08/1986 |
| 4599098 | Optical fiber and method of producing same Low signal attenuation optical fibers and methods for making such fibers mimimize the internal and interface defects while providing high throughput by radial deposition of successive particulate layers about a small diameter start element and co-vitrific... | 07/08/1986 |
| 4595915 | Electronic surveillance system employing the doppler effect A coherent frequency, velocity responsive electronic surveillance system detects the motion of a transponder relative to two receiving antennas on opposite ends of a surveillance zone positioned at the exit of a retail store. Motion in opposite directions... | 06/17/1986 |
| 4592183 | Modular roofing system A module readily assembled roofing system for overlying a base structure, e.g. of a house or building, comprising a plurality of elongated modules of identical cross-section, each support including a principal body member defining a planar upper surface f... | 06/03/1986 |
| 4570449 | Refrigeration system A refrigeration unit (10) includes a temperature control circuit (42) in which a plurality of coils (32) are wrapped around associated compressors (24, 26, 28, 30, 38 and 40) and are arranged in parallel between a supply manifold (44) and a return manifol... | 02/18/1986 |
| 4565996 | Range limited coherent frequency doppler surveillance system A time limited coherent frequency doppler radar system monitors a precisely bounded merchandise detection zone for motion of a transducer therein. False alarms are reduced without limiting sensitivity by limiting the maximum radar signal propogation times... | 01/21/1986 |
| 4562742 | Capacitive pressure transducer A capacitive pressure transducer is comprised of a deflectable diaphragm and a substantially planar reference plate, both preferably molded of ceramic. The diaphragm includes a sensor electrode ring disposed about a central region thereof and a concentric... | 01/07/1986 |
| 4562500 | Mechanism for latching magnetic disk memory head/arm assembly in parking zone A mechanism is disclosed for latching the read/write heads of a magnetic disk memory in a parking zone. The mechanism permits the heads to operate in the read/write mode within small distances of the parking zone and requires no additional electrical powe... | 12/31/1985 |
| 4561610 | Tape cartridge loading apparatus An arrangement for loading a tape cartridge in a deck of a magnetic tape transport has a motor-driven pair of cams engaging different ones of a pair of pivotally mounted elongated arms disposed beneath the deck with one of the arms mounting a pawl extendi... | 12/31/1985 |
| 4558549 | Wall construction prefabricated from interconnectable modules In a wall construction prefabricated from interconnectable complementary panels each of the panels includes a pair of generally rectangular, offset planar surfaces and a number of metal interconnectors attached thereto at least along the margins for inter... | 12/17/1985 |
| 4556325 | Compartmentalized dynamic mixing apparatus Apparatus for storing and selectively mixing at least two distinct substances in a common package has a container (10) for creating a substance holding chamber (16) in which is disposed a barrier (18) arranged for separating the chamber into at least two ... | 12/03/1985 |
| 4554552 | Antenna feed system with closely coupled amplifier A compact antenna feed system for orthogonally polarized RF signals includes a waveguide feed having orthogonally disposed internal ridges, a pair of wave detectors coupled to the waveguide feed to receive orthogonally oriented RF signals, and an amplifie... | 11/19/1985 |
| 4549146 | Systems and methods for compensating for element nonlinearities in electronic circuits The distortion effects introduced in a complex multifrequency wave by parametric variations in individual active elements arising from signal and power supply variations in a circuit, such as an audio amplifier, are compensable through the use of replicas... | 10/22/1985 |
| 4543630 | Data processing systems and methods A multiprocessor system intercouples the processors with an active logic network having a plurality of priority determining nodes. Messages applied concurrently to the network in groups are sorted, using the data content of the messages, to a single or co... | 09/24/1985 |
| 4537367 | High speed bidirectional magnetic tape transport with constant tension A length of magnetic tape extending between a pair of reels within a cartridge is driven bidirectionally at high speeds with substantially constant tension by a transport having a pair of capstans engaging and movable to accommodate the constantly changin... | 08/27/1985 |
| 4525287 | Thread and bearing lubricant A lubricant composition for thread or bearing surface operated at high temperature and stress load conditions, a thixotropic mixture including a Jojoba base vehicle, metallic and non-metallic particulates, a metallic component for wetting the stressed thr... | 06/25/1985 |
| 4524399 | Magnetic disk memory power supply In a magnetic disk memory, a magnetic disk is driven by a DC motor having a permanent magnet rotor and a pair of stator windings sharing a common ground connection point. The windings are alternately energized from an electrical power source by a switchin... | 06/18/1985 |
| 4520970 | Cartridge tape drive having vacuum auto-threading In a magnetic tape drive in which the supply reel is contained within a cartridge, the tape is automatically threaded from the supply reel within the cartridge past a magnetic head assembly to the take-up reel by a vacuum source coupled via apertures in t... | 06/04/1985 |
| 4517245 | Non-ionic epoxy resin emulsion finishes for carbon fibers A composition is disclosed for treating carbon fibers to provide an epoxy finish thereon, comprising an epoxy resin and an effective amount of a non-ionic emulsifier in the form of a block polymer consisting of a poly(oxypropylene) chain having poly(oxyet... | 05/14/1985 |
| 4508356 | Modified C-shaped mechanical spring seal A mechanical spring seal comprising in combination an elastomeric jacket and a resilient spring insert having modified and matching C-shaped cross-sectional configurations. The major portion of the length of the spring follows a relatively straight path b... | 04/02/1985 |
| 4507796 | Electronic apparatus having low radio frequency interference from system clock signal A printer having greatly reduced radio frequency interference from the system clock signal therein is provided by angle modulating the system clock signal in accordance with a desired modulation signal. The modulation signal is chosen so as to spread and ... | 03/26/1985 |
| 4507272 | Method of purifying partially carbonized pan material prior to carbonization In a method of producing purified carbonized material from polyacrylonitrile precursor material, the precursor material is initially oxidized and partially carbonized prior to purification treatment to remove alkali and alkaline earth metal impurities. Fo... | 03/26/1985 |
| 4506611 | Three-dimensional thick fabrics and methods and apparatus for making same Three-dimensional thick fabrics are made from a laminate of fabric plies by first inserting pointed rods through the laminate to form rows of holes after which needles are reciprocated through the different holes to pull loops of various yarns through the... | 03/26/1985 |
| 4502717 | Pneumatically releasable, tamper-resistant security tag A reusable, pneumatically releasable security tag for monitoring merchandise such as a garment, is disclosed. Encapsulated within the tag is a transponder element which reradiates a radio frequency signal to trigger an alarm when a tagged article is carri... | 03/05/1985 |
| 4501037 | Method for introducing heat-sensitive material into a hot environment In a process for continuously pulling a web of tows of carbonizable material under tension through an oxidizing oven, the web is introduced into the oxidizing oven by initially feeding a leader in the form of a web of heat-resistant cloth through the oven... | 02/26/1985 |
| 4499216 | Method and resin solution for splicing carbonized polyacrylonitrile material A method is provided for splicing carbonized PAN tows in which the tows to be spliced are cut square and coated at the ends thereof with a resin solution, following which the coated ends are joined together, heated so as to cure the resin solution and the... | 02/12/1985 |
| 4498793 | Printer shuttle drive having castered cam followers In a printer in which a shuttle and a counterbalancing mass are driven in opposing reciprocating fashion by a rotating, generally oval-shaped cam, the cam followers which couple the shuttle and the counterbalancing mass to the cam are castered to prevent ... | 02/12/1985 |
| 4498388 | Print hammer mechanism having intermediate pivot fulcrum In a print hammer mechanism in which a thin, flat hammer spring is mounted at a fixed end thereof to a magnetic structure which includes a permanent magnet and a pole piece having a pole tip facing the opposite free end of the hammer spring on a side of t... | 02/12/1985 |
| 4498295 | Thermal energy transfer system and method A thermodynamic system for interchanging thermal energy with external sources or sinks while minimizing the dead volume presented to the pressure cycle is based upon a thermodynamic machine which cycles a working fluid bidirectionally through a regenerato... | 02/12/1985 |
| 4497098 | Fill yarn removal apparatus Apparatus for removing a fill yarn from a web of warp tows advances the web lengthwise across a tabletop having opposite pairs of bars at the leading edge thereof for separating the outermost tow at each of the opposite edges of the web from the remaining... | 02/05/1985 |
| 4477050 | Multi-directional vibration attenuator seat A multi-directional vibration attenuator seat is capable of limited, restrained movement in any direction within a generally horizontal plane in response to vibration and other motions of the seat and the vehicle in which the seat is mounted. The limited ... | 10/16/1984 |
| 4476404 | Flexible conductor for supplying current to a pivotally movable electrical element A flexible conductor strip is provided for connecting a pivotally mounted electrical element, such as the armature of a sector motor, to fixed terminals supplying control signals to the electrical element. The conductor strip includes an arcuate segment h... | 10/09/1984 |
