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Lawrence Welk, the bandleader who entertained millions of Americans over a generation of broadcasting his TV show, once received a patent: for a music-themed design of an ashtray.
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| Number | Title | Issue Date |
| 4298918 | Fluorescent fixture socket An improved socket assembly for a fluorescent fixture is provided in which a terminal floats on a pair of guide posts. A spring exerts a biasing force on the terminal urging it into position to receive and retain the pins of a fluorescent tube.... | 11/03/1981 |
| 4293898 | Garden light fixture A garden light fixture is provided comprising a cylindrical housing about which a plurality of shades extend. The intermediate and top shade are secured to the housing by means of keyways formed integral with the shades which engage and are captured by sl... | 10/06/1981 |
| 4292639 | Quasi-doppler direction finding equipment A quasi-doppler direction finder is provided wherein the alternate dipole elements are divided into two groups. Each of the groups is connected to an associated RF attenuator which is driven by a control signal 180° out-of-phase from that for the other g... | 09/29/1981 |
| 4292284 | Solvent extraction recovery process for indium Indium is recovered effectively from an aqueous leached solution containing indium ions, together with other ions such as ferric ions, zinc ions, etc. if any, by adjusting the pH of the aqueous solution to 0.25-4.5, extracting the indium ions from the aqu... | 09/29/1981 |
| 4288306 | Process for forming a metal or alloy layer and device for executing same A process for depositing a metal or alloy layer on an electrically conductive work piece by means of a glow discharge. The work piece is inserted as one electrode of an electric field in a low-pressure chamber charged with a preionized carrier gas and coa... | 09/08/1981 |
| 4285021 | Circuit for generating an audible signal in tape recorders at the tape end A circuit for generating an audible signal in a tape recorder as the tape approaches its end. The circuit includes an open loop extending between the recording amplifier and loudspeaker. The loop is closed by the metallic foil at the end of the tape when ... | 08/18/1981 |
| 4283037 | Telephone display device A telephone display device comprises a pair of spaced apart legs, an easel mounted to the tops of the legs and a support member extending transversely across the bottom of the legs. The support member is proportioned to fit within the hand grip opening at... | 08/11/1981 |
| 4282257 | Production of vinegar with high acetic acid concentration Vinegar having an acetic acid concentration higher than 18 percent weight by volume is produced in a submerged fermentation by maintaining the temperature of the fermenting broth after the initiation of the fermentation at 27°-32° C. until the acetic co... | 08/04/1981 |
| 4273955 | System for in-service quantitative performance analysis of data communications system A data communication system is provided comprising, at a plurality of locations, data terminal equipment. Communication equipment adapted to transmit and/or receive data from location to location is provided at each location connected to the terminal equi... | 06/16/1981 |
| 4274118 | System for the recording and play-back of video signals A system is provided for increasing the recording/play-back time for video tape devices. A tape is utilized on which signals are recorded in one direction for one half the tape width and in the opposite direction for the other half of the tape width. The ... | 06/16/1981 |
| 4271527 | Double side band-quadrature carrier modulation signal structures An improved method is provided for the complex plane mapping of the signal structure constellation for double side band quadrature carrier modulation. All points are mapped in an N×N constellation having 90° symmetry about the origin. All points in exce... | 06/02/1981 |
| 4268257 | Wheel simulator A device to simulate the rolling of a hypothetical wheel along a path is provided. The device includes a wheel sector mounted to one end of a rotor. A drive is provided for rotating the rotor in one direction and the sector in the opposite direction so th... | 05/19/1981 |
| 4266683 | Outdoor junction box An improved electrical junction box particularly suitable for outdoor use is provided. The junction box contains a plurality of mounting holes each of which is closed by a grommet. The mounting holes are defined within lugs having raised and depending por... | 05/12/1981 |
| 4252505 | Electromagnetic pump An electromagnetic pump characterized in that two independent coils disposed adjacent each other and via a common magnetic path are used for actuating a plunger and a valve, respectively, thereby preventing the generation of noises and abrasion during the... | 02/24/1981 |
| 3997722 | Facsimile reproduction system A facsimile reproduction system is disclosed. The system utilizes a laser beam at the transmission station to scan across an image to be reproduced through an acousto-optic modulator (AOM) cell. The laser beam is reflected off the image onto photo detecto... | 12/14/1976 |
