Did You Know...
...that it was melting ice cream that inspired the invention of the outboard motor? It was a lovely August day and Ole Evinrude was rowing his boat to his favorite island picnic spot. As he rowed, he watched his ice cream melt and wished he had a faster way to get to the island. At that moment the idea for the outboard motor was born!
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 4460927 | Optical reading device for reading an information carrier with motion effect facilities The invention relates to optical reading of a track in a spiral or concentric circles, carried by an information substrate, usually a disc, television signals being recorded along the track. The reading device includes a device for generating track jump p... | 07/17/1984 |
| 4445144 | Method for detecting eccentricity in a video disc and in a video disc player A method for detecting and measuring eccentricity in a video disc and a video disc player, in which a video signal representing a special eccentricity test pattern is recorded on a prescribed set of adjacent recording tracks on the disc. Each frame of the... | 04/24/1984 |
| 4429335 | Rotary recording medium reproducing apparatus capable of performing special reproduction A reproducing apparatus is capable of performing special reproduction of information signals recorded on a rotary recording medium. The information signals are recorded in either spiral track turns or concentric tracks. The reproducing apparatus comprises... | 01/31/1984 |
| 4425636 | Method and apparatus for reproducing optically an information recorded on a record medium along tracks In a method and apparatus for detecting an information signal and a focussing error signal of an objective lens with respect to a video disc on which main and sub beams emitted from a laser light source are to be focussed as light spots by the objective l... | 01/10/1984 |
| 4371894 | Video disc transducer system and method A video disc record having a spiral video record track which can provide reproduced video signals with a desired frame rate such as thirty frames per second while the disc record is rotated at a very low speed such as two revolutions per minute. A preferr... | 02/01/1983 |
| 4366564 | Apparatus for writing digital information in a disc-shaped optically readable record carrier An apparatus for recording optically detectable information in a record carrier provided with information areas arranged in accordance with a spiral or concentric track pattern, which areas alternate with synchronization areas each containing the address ... | 12/28/1982 |
| 4357627 | Method and apparatus for improving resolution of scophony scanning system utilizing carrier phase reversal An optical data recording system in which during recording the image of the acoustic pulse at the writing surface is made to move at the same relative velocity with respect to the recording medium whereby motion blur is minimized or reduced. The writing b... | 11/02/1982 |
| 4331976 | High density recording system using side-by-side information and servo tracks An information signal recording system records both an information one and at least one single kind of reference signal for providing a tracking control on a recording medium. The reference signal is recorded on an intermediate part of the recording mediu... | 05/25/1982 |
| 4332022 | Tracking system and method for video disc player A video disc player is described for use with a video disc having frequency modulated video information recorded thereon in the form of a plurality of concentric circles or a single spiral. The information track comprises successively positioned light ref... | 05/25/1982 |
| 4315283 | High density recording system using side-by-side information and servo tracks An information signal recording system records an information signal, a first and a second reference signals for tracking control, and a third reference signal for switching the first and second reference signals at the time of reproduction on a recording... | 02/09/1982 |
| 4310919 | Optical video disc structure A symmetrical video disc structure and method for making the structure are described. The video disc structure is symmetrical about a plane passing through a core member and equidistant and parallel to a first information bearing surface and a second info... | 01/12/1982 |
| 4286147 | In-focus detecting device A focus lens protecting and in-focus detecting device has light receiving circuit and a comparator for comparing the output of said light receiving elements with a reference potential. A switch network is controlled by the output of the comparator to supp... | 08/25/1981 |
| 4241240 | Optical information recording apparatus An optical information recording and reproducing apparatus is disclosed in which a predetermined signal is recorded on a track of a rotating recording medium by a recording light beam and the recorded information is reproduced by a reproducing light beam.... | 12/23/1980 |
| 4229763 | Optical high density FM recording device with corrective signal An optical high density recording device which comprises, in combination, a beam generator, a beam modulator to modulate the beam in accordance with an applied modulating signal, a recording medium to record a locus of the beam irradiated thereonto. The r... | 10/21/1980 |
| 4213158 | Optical data recording system utilizing acoustic pulse imaging to minimize image blur An optical data recording system in which during recording the image of the acoustic pulse at the writing surface is made to move at the same relative velocity with respect to the recording medium whereby motion blur is minimized or reduced. The writing b... | 07/15/1980 |
| 4199820 | Random access storage apparatus with a movable recording medium In a storage apparatus wherein signals recorded on tracks assigned addresses in advance on a rotary recording medium such as an optical video disk are randomly searched at high speed, a random access storage apparatus is provided in which erroneous search... | 04/22/1980 |
| 4160270 | Tracking servo system for video disc player/recorder A servo loop is provided in an optical record/play apparatus for controlling a motor assembly providing relative motion in a radial direction, with respect to a disc record, between the disc record and a beam of focused light. In a record mode of operatio... | 07/03/1979 |
| 4124868 | Head control means for optical videodisc player The invention relates to methods for controlling the starting and stopping of the reading of recording supports read in appropriate readers. The method according to the invention comprises providing a zone free from information at least at the beginning o... | 11/07/1978 |
| 4101947 | Narrow track magnetic-head recorder Information is recorded on a magneto-optic medium having a predominant proportion of preferred domain orientations with a substantial component normal to a recording surface thereof, by using a fringe field component from a magnetic-head. At least one mag... | 07/18/1978 |
| 4093961 | Optical reading apparatus with scanner light intensity control An optical scanner A for a video recording disc B includes a photo detector 6 for sensing the light from a laser source 1 reflected back from the disc. The low frequency and d.c. components of the photo detector output are compared with a reference voltag... | 06/06/1978 |
| 4057832 | Apparatus for reading a disk-shaped record carrier with track jumping for charging motion effects An apparatus for optically reading a record carrier on which information is contained in tangentially extending tracks includes a directing system for making the scanning spot cooperate with the desired track. In order to enable a jump-wise displacement o... | 11/08/1977 |
| 4051528 | Apparatus for optically reconstructing information Optical information reconstructing apparatus comprising a disc having at least one surface on which groups of dots bearing information are concentrically or spirally arrayed, a mechanism for rotating the disc, a light source for projecting a light beam on... | 09/27/1977 |
| 4021606 | Hologram apparatus A hologram apparatus comprises a rotary plane with a plurality of holograms concentrically or spirally arranged thereon, a light emitting source, and at least one photodetector for reading out reconstructed images of the holograms. During rotation of the ... | 05/03/1977 |
| 3985952 | Elasto-optic device for spot wobble in a video disc player An elasto-optic device for providing periodic lateral displacement in a radial tracking servo system for a video disc player. A transparent prism is vibrated in either a flexural or a second harmonic extensional mode by a thin piezoelectric ceramic platel... | 10/12/1976 |
| 3963862 | Record carrier for a television signal In a record carrier for the storage of a television signal in an optically readable track-shaped structure, the information is contained in the frequency and/or amplitude of an undulation of the tracks of constant trackwidth. Via a phase-reading mechanism... | 06/15/1976 |
| 3962721 | Apparatus for reading a disc-shaped record carrier with video luminance and chrominance information An apparatus for reading a disc-shaped record carrier on which signals are recorded in parallel tracks in optically coded form. The signal is read with the aid of a beam of radiation, which after interaction with the record carrier impinges on two detecto... | 06/08/1976 |
| 3959581 | Self-compensating focus system for optical video playback device An optical video playback device having a self-compensating focus system Photographic one or more afocal relays for increasing the operating range of such a system.... | 05/25/1976 |
| 3931457 | Information carrier having addressed information tracks A video record for recording optically readable information is provided with a characteristic information code for quick searching of desired information. The information code is preferably provided within the information video lines which preceed the vid... | 01/06/1976 |
