Matches 251 - 300 out of 411 < 1 2 3 4 5 6 7 8 9 >
Match Document Document Title
4827361 Head clogging detector for use in a video tape recorder  
In recording/reproducing apparatus, pilot signals of different frequencies are recorded cyclically and in a predetermined sequence on parallel record tracks on a moving record medium together with...
4816933 Magnetic recording medium of particular coercive force, filling ratio, and protrusions and recording/reproducing method therefor  
A magnetic recording medium is provided comprising a flexible substrate and a ferromagnetic metal thin film layer on the substrate primarily comprising cobalt. When coercive force is measured by...
4796111 Modulating head tape distance with vibratory motion  
The invention in one embodiment thereof employs separate and respective heads for disparate signal frequency bands. One head is kept in intimate contact with the recording medium to maximize the...
4771344 System for enhancing audio and/or visual presentation  
A system for enhancing the perception of an audio and/or visual presentation by stimulating one or more persons experiencing the audio and/or visual presentation in response to events occurring...
4769804 Optical data recording and reproducing apparatus with erase function diagnosis  
An optical recording and reproducing apparatus for recording and reproducing data in an optical disk is disclosed. The optical disk has a plurality of erase test sectors in tracks, in one of which...
4755883 Removable information inputting device for an electronic recording apparatus  
A removable information inputting device which is removably provided with an electronic apparatus includes a keyboard for inputting an information of a program to be recorded, a memory for storing...
4743983 Recovering data from magnetic recording tape adhered after long storage  
A method has been discovered for recovering data recorded on magnetic recording tape wherein adjacent layers have become adhered after long storage times, even at recommended storage conditions....
4734791 Video tape recorder having status display mode  
A video recording and reproducing system provides an operator with the ability to view the status of all operating conditions of a system at one time. When it is desired to view the status, an...
4730222 Video recording apparatus having low and high resolution operational modes  
Video reproduction apparatus such as a video cassette recorder which is operable in either a first conventional mode or a second high resolution mode. The apparatus includes processing circuitry...
4695903 Audio video entertainment module  
An audio-visual entertainment device includes an enclosed module which contains a video screen, audio speakers and seating for one or two viewers. Sensors respond to the presence of a viewer to...
4688105 Video recording system  
A video recording system enables self-service production of vended videocassette recordings to a user or customer, with user control of several features. Preferably the system includes forming a...
4647989 Video cassette selection machine  
The disclosure being made by the Video Cassette Selection Machine is that of an automated library retrieval system of video tape cassettes combined with the additional features of a complete...
4642705 Magnetic recording and reproduction apparatus, system and method  
A system and method for effecting high density magnetic recordings on magnetic record members such as tape, cards, discs and drums coated with magnetic recoding material. A plurality of different...
4641207 Diagnostic device and method for examining the operation of a disk drive  
An external diagnostic device for examining the operation of a disk drive. The device is coupled to input terminals and output terminals of the drive and operates in a selected one of several modes...
4635227 Reading head for the magnetic scanning of elongate bistable magnetic elements  
The reading head comprises a core, which carries an electric detector winding and which may be E-shaped for reading two rows of Wiegand wires or U-shaped for reading one row of Wiegand wires. Two...
4609950 Magnetic head apparatus with variable inductance  
A magnetic recording head apparatus includes: a magnetic head body opposing a travelling magnetic tape; a tuning circuit having the head body as a variable inductance element; a high-frequency...
4607297 Apparatus for detecting clogging of head gap  
In an apparatus having a record mode for recording video or other information signals in successive parallel information tracks on a record tape by means of a plurality of rotary heads repeatedly...
4594703 Clock-signal reproducing circuit including voltage controlled oscillator  
A simplified clock-signal reproducing circuit for reproducing a clock signal from a repetitive pulse signal or a digital signal such as an EFM signal read from a compact disc as a data recording...
4568598 Article with reduced friction polymer sheet support  
A reduced friction composite sheet construction comprises a semicrystalline polymeric sheet support having a first and second surface, said surfaces having in the range of 5 to 99 percent...
4535369 Magnetic recording and reproducing apparatus  
Signals are recorded on a magnetic tape having a magnetic recording layer containing a magnetic material whose high frequency characteristic varies with a magnetic field produced therein. Changes...
4530016 Magnetic recording and reproducing apparatus  
Signals are recorded on a magnetic tape having a magnetic recording layer containing a magnetic material whose magnetic permeability or high frequency loss varies with a magnetic field produced...
4528601 Digital signal reproducing apparatus  
A digital signal reproducing apparatus comprises a reproducing circuit for reproducing a recorded unipolar signal from a recording medium, an equalizer for subjecting the reproduced signal to a...
4511934 Video tape recorder  
A video tape recorder includes a rotary magnetic head drum having a rotating member and a magnetic head mounted on the rotating member, a laser element mounted on the rotating member, a current...
4500965 Capstanless magnetic tape drive with electronic equivalent to length of tape  
A magnetic tape drive capable of simulating the performance of a fast acceleration start/stop tape drive without a capstan drive or vacuum columns. A streaming type tape drive is provided with a...
4468751 Dictation recording and transcribing system with variable playback sequence  
A central dictation and transcribing system including a plurality of dictate stations (16) and a plurality of transcribe stations (17) in which recorded dictation is recorded in the form of...
4466023 Video disk player simulator, method and apparatus  
A system and method for simulating the operation of a video disk player playing an interactive video disk, which comprises a video tape player, a timing code reader, a monitor, a computer, and an...
4429261 Apparatus for controlling the tension of a cassette tape  
A tape tension sensor is provided to produce an electrical signal indicative of the tension of the running tape of a compact cassette in a tape recorder, and this signal is processed to derive a...
4342059 Electronic gain and noise control for recording of analog information  
Audio signals with opposite relative phases are recorded on two tracks. A dual track head reproduces the signals from the two tracks and introduces another phase reversal of one signal relative to...
4294901 Thermoremanent magnetic imaging member and system  
A magnetic imaging process and imaging member comprising an electrically conductive layer overcoated with an electrically resistive layer wherein a latent magnetic image is formed on the imaging...
4194222 Multitrack recorder including superimposed real time code  
A multitrack recorder is disclosed in which each of a plurality of parallel data signals is mixed with an additional signal corresponding to a digital code indicative of the real time at which the...
4194110 Localized-field static magnetizing device  
A localized-field static magnetizing device consists of a non-magnetic substrate having a magnetic layer thereon that contains a succession of adjoining zones of alternately differing lengths and...
4153920 Recording method employing a magnetic recording medium  
This invention relates to a magnetic recording medium comprising a ferromagnetic metal thin film as a magnetic recording layer on a non-magnetic flexible support, in which the surface roughness of...
4143417 Portable data-gathering apparatus formed by modular components having operate-standby modes  
A hand-held data-gathering unit is formed by removably connected control and power modules: The control module contains a keyboard, a display device, a data input probe, and a microprocessor. The...
4121264 Method for recording information signal and control signal  
A first main information signal is recorded in a first track extending longitudinally along one side of a length of magnetic tape and a corresponding first secondary, or control, signal is recorded...
4106063 Circuit arrangement for a dropout detector  
In a circuit arrangement for a dropout detector for the detection of dropouts in signals which are reproduced from a record carrier, the signal path includes an amplitude discriminator before the...
4106028 Method and apparatus for forming magnetic images by piezoelectric coupling between an optical image and a magnetostrictive imaging component  
Method and apparatus are provided for forming a magnetic image on a recording element replicating incident image illumination. The recording element is a composite structure comprising a...
4101320 Magnetic imaging method  
A magnetic imaging system is disclosed wherein an optical image is first reduced to a graphic image by employing a magnetizable marking material followed by magnetization of the graphic image and...
4079426 Tape speed switching multiple track tape recorder  
An azimuth angle other than zero can occur if magnetic tape vibrates or moves in the tape width direction during recording or playback mode and this can result in azimuth loss which is a function...
4075665 Method and apparatus for increasing the recording capacity of a disk  
A method of recording and reproducing audio information on a disc shaped record carrier. During recording the audio information is divided into consecutive information segments of a duration τ t ....
4074326 Plural-track record disk initialization system  
Described is a transducer head assembly for magnetic disk files, the assembly using the informational data itself recorded on the disk in the form of a plurality of annular tracks for precisely...
4052747 Device for the magnetic domain storage of data having a shift register filled with coded series of domains  
A magnetic bubble domain device for recording information on a magnetizable recording medium including a shift register filled with a series of bubble domains coded in accordance with the...
4046973 Combined portable tape recorder and stereophonic receiver system  
An acoustic apparatus comprising a detachable combination of a stereophonic radio set and monaural tape recorder is disclosed. The tape recorder operates as a monaural element when decoupled from...
4034410 Magnetic recording medium  
A magnetic recording medium comprising a magnetic sheet of domain sized particles of at least one member selected from the group consisting of barium ferrite, strontium ferrite and lead ferrite,...
4012777 Record carrier and device for playing back same  
A recording device for storing and playing back information in which mechanical deformations which are representative of the stored information are provided in the surface of a record carrier...
3975195 Migration imaging system  
Material from a layer of migration material spaced apart from at least one surface of, but contacting a softenable layer is caused to imagewise selectively migrate to at least locations in depth in...
3967317 Predistortion of NRZ recording current for video recordings  
Undesirable interference beat patterns in the displayed video signals produced by a magnetic record/reproduce head are substantially eliminated by appropriately changing the amplitude of the...
3946404 Direct current bias fields for magnetic printing  
Recording head current in magnetic printing systems is reduced by application of a direct current magnetic bias field. The bias and recording fields add to produce a sum field with sufficient...
3943564 Stereophonic recording and playback apparatus  
Apparatus for making stereophonic recordings using multiple microphones, and playing back the recordings through multiple speakers, wherein each of the microphones is mounted with a corresponding...
3942188 Magnetic tape reproducing system  
A magnetic tape reproducing system for providing a still picture of a slow motion picture. A magnetic tape is provided on which video signals are recorded in successive fields of a unit length in...
3935594 Magnetic bubble read/write head for a magnetic recorder/playback device  
A device for recording and playing back information in a spiral-like track or a track consisting of concentric circles present on a disk-shaped recording medium, in which the storage and playback...
Matches 251 - 300 out of 411 < 1 2 3 4 5 6 7 8 9 >