Did You Know...
...that several people are credited with the invention of the flush toilet? Most people have heard of Thomas Crapper (1837-1910), the sanitary engineer who invented the valve-and-siphon arrangement that made the modern toilet possible. Another claimant to "the throne" was British inventor Alexander Cumming who patented a toilet in 1775. Then there's a nameless Minoan (a native of ancient Crete) who lived 4,000 years ago who supposedly was ahead of his time and created the first flush toilet!
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| Number | Title | Issue Date |
| 4563709 | Rotary record having a spiral track with a video signal and two audio signals recorded thereon A rotary recording medium is recorded with an information signal including a video signal on a spiral track formed thereon in terms of a plurality of fields of the video signal in one track turn of the spiral track. The rotary recording medium is time-seq... | 01/07/1986 |
| 4525751 | Disc record with tapered groove A video disc record of the constant angular velocity type (CAV) includes a spiral groove of constant pitch formed in a band on a surface thereof. The groove has a substantially constant nominal vertical dimension and vertical displacements which taper mon... | 06/25/1985 |
| 4476499 | Video disc recording and reproducing system A video disc recording and reproducing system in which a program is stored on a video disc to eliminate the need for the user to manually input a control program. A program and control signal is recorded in place of at least a portion of one of two audio ... | 10/09/1984 |
| 4446488 | Video format signal recording/reproducing system In a compound voice-image video format signal for displaying stationary image with audio accompaniment, the voice identification signal placed into the vertical blanking interval prior to a voice signal portion also indicates the stereo, bilingual or mona... | 05/01/1984 |
| 4388654 | Video disc player with selectively enabled audio signal expander circuitry A video disc player designed to play video disc records having either non compressed monophonic wide band audio signals or video disc records having compressed stereophonic limited band audio signals recorded thereon. The player includes expander circuitr... | 06/14/1983 |
| 4386377 | TV Interface RF modulation circuitry An interface circuit for selectively generating TV RF signals on one of two adjacent TV channels is designed with two independent RF oscillator-modulator circuits. The respective double sideband modulated signals generated by the RF modulators are respect... | 05/31/1983 |
| 4353090 | Extended play video recording and reproducing system with selection of multiplexed audio A video recording system, and related reproducing system, best suited for use in making and reproducing video disc recordings, wherein each recorded frame of video information represents one or more frames of an original video program, as designated by a ... | 10/05/1982 |
| 4346471 | Optical apparatus for tracking a record carrier An apparatus for tracking, by means of radiating beams of light, a record disc (6) which contains video or audio signals recorded in optical form. First and second lasers (1a, 1b) generate a first beam for reading out recorded information, and a second be... | 08/24/1982 |
| 4329712 | Adaptive distortion elimination circuitry for a video disc player The present invention describes non-linear circuitry for reducing intermodulation distortion occurring in signals recovered from a disc record. The non-linear circuit generates complementary signals in a diode modulator for cancelling the undesired distor... | 05/11/1982 |
| 4321622 | Video track transfer system and method TV playback apparatus and method for a record having track sets comprising video track analogs and a plurality of audio track analogs disposed between the video tracks. All tracks in a respective track set are sensed for playback by a movable reading head... | 03/23/1982 |
| 4286290 | Fast recovery squelch circuit for a video disc player A squelch circuit responsive to a squelch signal mutes audio and video circuits in a video disc player, preconditions a video signal correction servo system to the center of its control range and inhibits a defect correction circuit. A squelch memory, set... | 08/25/1981 |
| 4227213 | Video signal recording system A system for recording stationary images on a convolution track of a video disk in which a stationary image video signal of at least one frame is optically recorded on the track every revolution of the disk. An audio signal is recorded on portions of the ... | 10/07/1980 |
| 4065794 | Playback technique for an audio-video program wherein the video display is controlled by signals recorded as a part of the audio program In an audio-video program consisting of time compressed segments of audio information in the format of TV lines and video change signals associated with one or more of the audio segments, and video information to be displayed in response to the video chan... | 12/27/1977 |
| 4065795 | Recording technique for an audio/video program wherein the audio incorporates video change signals In the recording of audio-video programs in which the audio is time-compressed and converted into television format, the video frames associated with a given audio frame are recorded in a group immediately following the audio frame, and picture-change cue... | 12/27/1977 |
