Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 7091863 | System and method for tracking the movement and location of an object in a predefined area A preferred embodiment includes a system for tracking the movement and location of an object in a predefined area. The system comprises an object having at least one readable sensor contained therein. The at least one readable sensor transmits a unique signal. There... | 08/15/2006 |
| 5297130 | Driving apparatus and a recording and/or reproducing apparatus using the same A driving apparatus for driving an object comprises a pair of piezoelectric elements, one of them being arranged on the one side of the object while the other of them on the other side of the object, and the respective electrode arrangement directions of ... | 03/22/1994 |
| 4860277 | Medium and method for irreversible storage of information A medium for irreversible information storage by locally changing the electrical conductivity of a carrier whose discrete areas of electrical conductivity have been produced by means of polymeric systems which contain conjugated double bonds and are forme... | 08/22/1989 |
| 4504941 | Stylus cartridge having stylus arm restraint The stylus arm restraint comprises an element disposed substantially perpendicular to the stylus arm, and having a portion that is received in a recess provided in the cartridge housing when the stylus arm is held inside the cartridge. The reception of th... | 03/12/1985 |
| 4497052 | Stylus for reproducing information signals recorded on a recording medium A reproducing stylus traces a track of a recording medium, in which track an information signal is recorded as variations of geometrical shape, and reproduces as variations in capacitance the information signal thus recorded. The reproducing stylus compri... | 01/29/1985 |
| 4489278 | Electrostatic voltage detecting device An electrostatic voltage detecting device includes a detecting electrode for detecting an electrostatic voltage generated by charge on a recording medium, a variable capacitance diode whose capacitance changes according to an output signal applied from th... | 12/18/1984 |
| 4439853 | Capacitive playback stylus A capacitive information disc playback stylus comprising a dielectric support element having in one portion a conical body terminating in a constricted tip. The tip comprises a curved prow surface, a flat electrode surface remote from the prow, shoulders ... | 03/27/1984 |
| 4439855 | Capacitive playback stylus A playback stylus for a capacitive information disc comprising a shank, a dielectric material at one end of the shank, a first conical region of a first angle in an end portion of the dielectric material, a second conical region adjacent to the first coni... | 03/27/1984 |
| 4439854 | Video disc stylus A playback stylus comprising a dielectric support element having a conical end, two flats in the conical end, and a constricted terminal portion defined by side surfaces, shoulders interconnecting the side surfaces and the flats, a prow defined by a first... | 03/27/1984 |
| 4433409 | Pick-up assembly for video disc player A pick-up assembly for use in a video disc player comprises a stylus having one lengthwise surface provided with an electrode and secured to a stylus carrier with the electrode facing in a direction away from the carrier, and a generally strip-shaped fly ... | 02/21/1984 |
| 4398282 | Capacitance detection type stylus for grooveless disc records and method for making same A cylindrical diamond body is shaped to form a truncated conical portion. A conductive layer is deposited on the diamond body extending from the truncated end to the other end of the body. The conical portion of the body with the conductive layer being at... | 08/09/1983 |
| 4371961 | Capacitive information system An improved information storage and recovery system comprising a playback stylus, having a dielectric support element and a conductive electrode, and a grooved conductive disc record in which information is recorded. The information is recovered on playba... | 02/01/1983 |
| 4360909 | Signal pickup device in a rotary recording medium reproducing apparatus A signal pickup device comprises a reproducing element for reproducing recorded signals from recording tracks of a rotary recording medium, a holder having said reproducing element mounted at its tip end, a cantilever having the rear end of said holder mo... | 11/23/1982 |
| 4351044 | Recording system using disk-shaped recording medium A recording system of the type wherein the information is recorded on a spiral track on a disk-shaped recording medium, which is rotated by a signal transducer which is moved radially with respect to the recording medium. Both the rotational speed or angu... | 09/21/1982 |
| 4320491 | Apparatus for video disc stylus electrode reconditioning The invention describes a method and apparatus for reconditioning a video disc signal pickup stylus electrode to prevent electrode-disc electrical shorts. An AC or DC potential is repetitively applied during a predetermined period between the stylus elect... | 03/16/1982 |
| 4297312 | Method for preparing stylus lapping discs An improved method of reproducing a spiral groove pattern in the surface of a plastic disc wherein the intersections of the surface of a metal article generated during the replication process are filled in to form concave junctions.... | 10/27/1981 |
| 4296371 | System for measuring stylus shoe length A system for measuring shoe length of a stylus adapted to track a path along a surface of a video disc comprises positioning the tip of the stylus adjacent the surface of a substrate having a signal therein for effecting capacitive variations between the ... | 10/20/1981 |
| 4225755 | Capacitive force transducer A capacitive force transducer, particularly suited for use as a microphone or as a phonograph needle pick-up cartridge, comprises a diaphragm electrode insulatively held to a lip portion of a recess in a second electrode, thereby forming a capacitive dete... | 09/30/1980 |
| 4205856 | Pickup cartridge A pickup cartridge for reproducing disk-shaped record carriers having a spiral groove as an information track carrying audio and/or video information. A horn-shaped resilient seal member prevents entry of foreign matters, such as moisture or dust into the... | 06/03/1980 |
| 4124217 | Signal pick-up apparatus for reproducing a recording disc In a signal pick-up apparatus for reproducing a recording disc, a pick-up cartridge casing is detachably loaded at a predetermined position on a pick-up apparatus structure. An arm is rotatably supported at one end thereof, within the casing. At its other... | 11/07/1978 |
| 4001519 | Pick-up cartridges for gramophone records A pick-up cartridge for a gramophone record comprises a cartridge shell in which is mounted a stylus assembly including a short, rigid stylus arm and a resilient wire which is much shorter in length than the arm and is attached to the rear end of the arm ... | 01/04/1977 |
| 3945902 | Metallized device and method of fabrication A diamond body and an oxide substrate are simultaneously sputter-etched such that the diamond body is cleaned and a layer of the sputtered oxide is deposited on the clean surface of the diamond body, then a metallic layer is deposited on the oxide layer. ... | 03/23/1976 |
