US2073370A - Television system - Google Patents

Television system Download PDF

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Publication number
US2073370A
US2073370A US640616A US64061632A US2073370A US 2073370 A US2073370 A US 2073370A US 640616 A US640616 A US 640616A US 64061632 A US64061632 A US 64061632A US 2073370 A US2073370 A US 2073370A
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United States
Prior art keywords
signals
scanning
foreground
background
series
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Expired - Lifetime
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US640616A
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English (en)
Inventor
Alfred N Goldsmith
Thaddeus R Goldsborough
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RCA Corp
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RCA Corp
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Filing date
Publication date
Priority to FR767445D priority Critical patent/FR767445A/fr
Priority to NL39575D priority patent/NL39575C/xx
Application filed by RCA Corp filed Critical RCA Corp
Priority to US640616A priority patent/US2073370A/en
Priority to GB29327/33A priority patent/GB417282A/en
Priority to DE1933R0089113 priority patent/DE691237C/de
Application granted granted Critical
Publication of US2073370A publication Critical patent/US2073370A/en
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/272—Means for inserting a foreground image in a background image, i.e. inlay, outlay

Definitions

  • the present invention relates' to a system by which independent series of signals may be com-- bined.
  • the invention is applied to television systems and is particularly diducing composite television pictures.
  • a composite picture by which is meant a picture in which 4the background is separately produced from the Vsorting to elaborate masking schemes o'r without the need of resorting to elaborate sets atI the point of transmission.
  • any theatrical presentation it is usually customary to develop for each change of scene to the observed a set and then to position the actors relative to the set so that the entire visible area may be subjected' to view by the audience.
  • anobject of the present invention to provide a system for producing comA posite pictures or television images wherein the foreground. and background action may take place at widely separated points yor may take place at two or more closely'adja'cent points .al-1. though the points are not in direct view offeneanother and the vaction at each point can be en? motion picture lms maygii desired, be used to ground action may take place separately and then be combined with the background to present ac.
  • a systemA for pro-'- foreground is suitably transmitted without remonitor viewing system and then photographingv tirely separate from the action at the other point.
  • a further ⁇ object of this invention is to provide ways and means by which the background and foreground actions may be separately scanned and analyzedand by which the foreground action may serve to cause in the transmission an omission of transmittedsignals representativeof the background.
  • the present invention is so constitutedv that the complete transmission will representvthe combination of foreground and background properly coordinated in sequence to produce at receiving points a single combined or composite picture or image representation representative of both the foreground and the background action or scene.
  • Another object of the invention is to provide a system by which it is relatively simple to photo'- graph composite pictures representing .combined foreground and background action. This may be done'in a convenientmannerby providing a theimage appearing thereupon.
  • a further object of this invention is to produce a system -for transmitting television images in .whicnit is possible to use a single background set and to maintain the desired focus with variations in position of the foreground action without. motion of the background which will evoke inthe mind of the observer the' impression of moving background.
  • Such actions and effects are producible, for example, by virtue .o f the factthat'whenever it is desired tol have 'the fore- .ground action move nearer or further away from @the point ofl scanning than for conditions of normal transmission the predetermined 'xed relv ative locations of the foreground and background actions may be suitably provided for withoutany' physical shift of either foreground ⁇ or back-f ground through a suitably arranged optical system a system 'for transmitting composite Piires which utilizes for the most part only the existing Vwith this known apparatus arrange Vnew vand "novel methods for coordinating the ac' i' l tions at av plurality of points for the combined' transmission of a single series of image signals representative oi' the action or scene at both the background and the foreground.
  • Fig. 1 illustrates the transmitter end of the television system developed in accordance' with this invention.
  • Fig. 2 illustrates also schematically a suggested frm of receiver apparatus for receiving the irnage signals transmitted from the transmitter of Fig. 1;
  • each scanning system includes a lightsensitive plate electrode I2 adjacent to which is a'pick-up or grid-like electrode serving as an anode.
  • the image of the illuminated background and foreground action is adapted to be projected upon the light-sensitive electrode -by way of a suitable optical system (not herein shown) so as to cause at each elemental area of the lightsensitive electrode a space charge which is proportionate in density to the illumination at the coordinated elemental area.
  • a cathode ray is generated and caused to sweep the lightsensitive electrode within the tube by means of deflecting fields I2, I3, I4 and I5 of which the fields I2 and I3 provide motion in one direction 'mental areas can and the fields I4 and I5 provide motion of the beam in a direction transverse, and if the corresponding iields of each scanning tube are coordinated-'it can be seen that the cathode ray generated within the tubes 9 and II will simultaneously impinge upon coordinated elemental areas of lthe light-sensitive screen contained within each tube. In this manner the space charge coordinated with the particular elemental area on which the cathode ray pencil instantaneously impinges is released. Precision adjustment of thisA sirnultaneity of impact on coordinated elebe arranged by suitable electrical adjustment of the circuits associated 4with the tubes 9 and II as hereinafter described.
  • the released space charge may then be applied to the amplifiers I1 and I9 by way of conductors 2I, 2i and 23, 23 ,respectively so as to cause output currents to appear in the output circuits of the amplifiers which correspond in intensity or are proportionate to the intensity of the light impinging upon each elemental area of the light-sensitive electrode within the scanning tube., y
  • the scanning tube 9 scans the background I and that the scanning tube II scans the foreground 3. It can be seen easily that at points where there is a ,scanning operation taking place 1n the foreground, as scanned by tube I I, it will usually be undesirable to permit output energy for transmission to result from the background scanned by the tube 9. If this were notso the receiving points would view the combined simultaneous scanning of background and foreground and the'produced electro-optical image signals at ⁇ the receiver would be ghost-like in appearance because both the background and foreground would be simultaneously observed with the result that the foreground action would appear unreal. normal conditions ghost-like,effects are not desired, but they can, when desired, be made use of, as will hereinafter appear.
  • the output from the amplier I9 representative of the foreground action is directed not only to the combining unit amplifier 25 but alsn to a biasing amplifier 21.
  • the biasing amplier 21, which may include any appropriate number of stages, has its output connected to the scanning tube 5 used for scanning the background.
  • the scanning tube' 5 which is substantially a duplicate of the scanning tube 1 as above mentioned, has, however, provided therein a grid control element 29 to control, in accordance with the teachings ofl Nicolson Patent #1,470,696, for example, the intensity of the cathode rays from the source which are projected within the tube. Whenever signals representing foreground actionappear in the amplifier I9 these same sig- .Under obvious that no scanning action can result for:
  • nals canlbe caused to. block the cathode ray pen- ⁇ ⁇ cil within the tube 5 ⁇ or,in other words, can be' used to bias the cathode ray tube 5 to cut-off. With the tube 5 biased in this manner it is quite .the particular area of -the illuminated ph'otosensltive layer o r surface which corresponds to the' area at which the foreground action is projected upon the lightesensitive surface of the 0 scanning tube 1.
  • the synchronizing sig-- nals for moving the cathode ray pencil within each 'scanning'v tube are directed from the syn ⁇ --chronizing signal generator 3
  • electrostatic' means may 'also beprovided, in which-case a sawtooth voltage wave would be generated inthe synchronizing signalgenerators 3l and 33 t'o -be applied 'to' the .electrostatic ray deflecting plates in contra st tothe saw-tooth current waveherein shown as developed vto produce the. electromagnetic ⁇ cathode ray deflection.- 1
  • thecarrier frequency is modu lated' by the output signals from thecombining 'lli-amplifiery unit 25.
  • the modulated carrier freservesto move the cathode ray within each scan' quency signals are thensuitably amplied inthe transmitter amplifier 39 and transmitted .to geographically'spaced points of reception by Way of the radio transmission link conventionally designated by the antenna 4I or by way of a wire line or network transmission where desired.
  • a portion of the output from the synchronizing signal generators-3l and 33 for producing the horizontal -and Vertical deflection of the cathode ray pencil within the scanningtubes 5 and 1 is also supplied by way of suitable conductors 43 and 45' to themodulator unit 3.5 through an ampliiier 41 whichcontains one more or less stage,
  • the signals transmitted from the transmitting means 4I consist of image signals for a .time period corresponding to the timerequired to movethe cathode ray pencil Within each of Vthe scanning tubes from left to right, for. ex-
  • a suitable receiver 49 is provided from which the signals are suitably amplliied in an amplifying means 5I and supplied' to theV detector 53 to which is also supplied energy from a local oscillator 55.
  • the output of the 'detector 53' there appear intermediate frequency signals which are suitably amplified in the intermediatefrequency amplifier 51 and directedto a second detector 59.
  • the output signals from the detector 59 ' are then suitably amplied in an ampliiierl unit 6I.
  • the picture signals l Vappearing in the output of amplier 5 I are ampliiied to a 'still further degree' by way of picture signal amplifier 634 and are then supplied across the grid cathode circuit of a cathode ray viewing tube 65.
  • the tube 165. is vprovided with a fluorescent end wall 61.
  • the impressed signals serve to control the intensity of the observable or.
  • the synchronizing nsignals are suitably separated and supplied by way of conductors 69 and 1
  • the synchronizing 20 signal generators 13 and 15 are preferably of the general form suggested by the above mentioned application of W. A. Tolson, Serial No. 608,460,
  • the observable eects produced by the cathode ray pencil 11 impinging upon the fluorescent screen 61 is an electro-optical image representation of the combined foreground andl background object areas l and 3 viewed by the scanning 'tubes 1' and 30 5, respectively.
  • each of the scanning tubes 5 and 1 may have as a part of the optical system 45 (not specifically shown herein) by which the light from the object areas l and 3 is directed to. the light-sensitive electrode of the scanning ltubes, a so-called Zoom lens system of the general type shown and described in considerable detail in the article by Messrs. Warmisham and Mitchell which appeared in The Journal of the Society of Motion Picture Engineers, vol. IXIX, No. 4, for October 1932, pages 329 to 339, inclusive.
  • AIt should be noted that when the Zoom lens is 55 used the lenses coordinated with each scanning tube 5 and 1 should be mechanically coordinated one with the other under usual conditions so as to maintain always the proper focus. Furthermore, if it is assumed that the scanning tubes are 60 arranged at'one fixed location and that at a. predetermined distance from each tube there is the separate foreground and background object areas and that, for example, the foreground action moves nearer to the foreground scanning tube ⁇ idly away from the viewing tube, or if it is desired and the background, of course, does not change,-
  • the biasing amplifier unit 21 may be so adjusted that signals directed thereto from the foreground signal amplifier I9 will not serve to bias to complete cut-off the scanning tube -5 but rather will serve only to reduce the amplitude of the output signals from the background scanning device 5 so that 'the combined signals appearing in the combining amplifier unit 25 for related and coordinated areas of the background and foreground simultaneously scannedby the scanning tubes 5 and 1 will be the combined light effect influencing each.v scanning tube, with the intensity of the signals resulting from any one scanning tube however usually diminished or reduced in intensity.
  • the first condition usually to be encountered is a condition where there is no action in the foreground; secondly the condition should be obtained wherein the foreground which is assumedfor purposes of illustration, to be a black matte, such as velvet in the form of a shade box, which is to be illuminated to the fullest extent which the action will require.
  • the biasing amplifier 21 should be adjusted until the background scanning tube 5 just operates completely.
  • This.l condition is the test f to determine the'sensitiveness of contol of the system to select automatically the separate image signals.
  • the black velvet 21, .assumed for the foreground a. red velvet, under which condition the actors 25 willuse green make-up and garments and green illumina- ,tion will be supplied.
  • the light-sensitive photocells or photo-sensitive areas of the scanning tube 1 will be sensitive to green or covered by appropriate green light filters in order that use may be made of the so-called complementary black vin i,
  • any suitable form of scanning device may, where desired, replace the cathode ray tube scanning system.
  • Such types of scanning devices which might 20 be used in' alternative constructions include the so-called Nipkow disk, with or without lenses; the rotary-Weiller Wheel; vibratory mirrors; multispiral and shutter disk combinations; and, in general, any and all types of television scanning devices.
  • the background is moving continuously it is frequently desirable to provide a systernby which the actors can view the scene providing the background eiect.
  • This may be provided by arranging the foreground and background areas I. and 3 so that they face toward each other so that the actors in the foreground can always view directly the instantaneous backupon a separatearea Awitliintlie view of the. actors but out of view of the scanning medium for foreground action. In this manner the foreground action may at times be made easier for 40 the actors 'and better coordination may besecured.
  • a monitor image reproducing system 36 may 1 be controlled by the signals appearing in the combining amplier 25 output circuit which will produce on .the monitor, assuming that a cathode ⁇ ray monitor tube is used, varying intensity electro-optical image effects properly coordinated with foreground andbackground.
  • the monitor image must also be controlled as 'to its instanta-A neous position on the image reproducing device A by means of the synchronizers for each view scanning tube lin a manner similar to the control produced upon the tubes 5,'1 or 65 by the synchronizing signal generators 3
  • actors in the foreground may around the objects so as to ma picture more realistic.
  • Fade-in and fade-out scene desirable in the viewed composi fade-ins and fade-outs may be background and foreground scel transmission may readily be a the apparatus'lherein disclose several foreground and backgro vices in parallel and under tl single controlling source. Eact would then scan an independen normal conditions only'one for background scanning device wc with the combining amplifier u when a fade-out from one scan fade-in to another scanning de he background or foreground i is desired the action may be desired or known type of fade apparatus,l such, for example,
  • imposite pictorial image represenindent means for separately and scanning in synchronism a pluareas to produce from each scan- )f signal impulses, means for, assignals representative of the two i areas, and means under'the conthe series'of signals for rendering e means to produce the lsecond is during periods of simultaneously al impulses from both the scan'- develop the controlling series of L'posite television.
  • hod o! transmittingcomposite telee image signals which comprises inscanning a plurality of related sized iynchronously and simultaneously to i each scanning a series of signals e of the intensity of light and shadlinated elemental areas of each obid'piercing together the signals of ident series into a single series of itrolling the effective intensity of the e of the original series of signals so rolled signal is-reduced to zero value ntrol of the other signal during the '.presence of signals in the controlseries.
  • composite television transmission which comprises simultaneously and syn- I chronously scanning' a plurality of related size object areas representing the background and foreground areas, producing simultaneously in accordance with the intensity of light and shadow on co-ordinated elemental areas of each separate scanned area an independent series of signals representative thereof, grouping together the plurality of independent series of signals into a single series of signals representative of the light intensity upon the two separate areas transformed into like dimensions and superimposed, and rendering one scanning operation ineffective to produce useful signal representations during each appearance of signal energy output from the other scanning and'under the control thereof so that the singley series pf signals produced from grouping together of the independent series represents an intermingled series of signals representative of like size foreground and background areas superimposed.
  • the method of transmitting composite television image signals which comprises simultaneously scanning two related object areas representing foreground and background along paths coordinated one with the other, producing by each separate scanning a series of variable character signals each representing the intensity of light and shadow upon the scanned object area, combining the separate series of signals to form a single series of variable character signals representative of both scanned objectareas superimposed, and reducing the signal strength of one series in the combined series to a value at least equal to cut-off in'accordance with the presence of simultaneously produced signals in the other series.
  • the steps which comprise scanning simultaneously -and synchronously two separate object elds of view to produce two separate series of signals each normally different from the other, reducing the energy output representative of one of the independent series during periods of presence of energy impulses exceeding a predetermined threshold value in the other series and under the control thereof, and simultaneously maintaining the energy impulse level of the controlling series at normal value.
  • steps' which comprise producing for spaced background and foreground areas .a plurality of series of energy impulses of electrical characteristics representative of varying values of light' and shadow, each of said series being representative of u one only of the background and foreground areas, combining the independent series to produce a composite series of impulses having electrical characteristics varying in accordance with both background and foreground areas, and reducing the amplitude of the impulses representative of' background to a zero value during periods of.'
  • a television systemA the method steps which comprise separately and sychronously scanning background and foreground areas to produce independent series of energy impulses-- of electrical characteristics representative of varying values of light and shadow of the areas scanned, combining the independent series to produce a composite series of impulses having electrical characteristics varying in accordance with both the background and foreground areas Scanned, and reducing the effective signal level of the impulses representativeof backgroundtoA cut-off value during periods of .simultaneously .produced signal representations of l foreground;
  • the method steps I10 ing intensity 'of light and shadow on elemental areas of the scannedfforeground and background areas, combining the .electric waves, and -upon combining the waves reducing the signal level of one of the electric waves representing one4 area to zero value during time periods where the electric wave representing the other area exceeds a predetermined effective intensity.
  • the method of producing a series of .signals representative of -a plurality vof independent areas scanned which comprises independently and synchronously scanning a plurality of independent areas of similar boundary forms producing from v each scanning independent electric waves of 3U characteristics varying proportionally to light and shade' variations of the scannedv areas, changing thenormal amplitude of one of the electric waves to zero value under the control of the other electric wave-during time periods when the other electric wave exceeds a predetermined amplitude value, and patching together the elec- ⁇ tricwaves to form a composite wave character:- istic of the wave which would result from superimposing the independent areas.
  • a plurality of simultaneously and synchronously operating scanning systems means to produce from each scanning system separate series of signals, means for controlling the output energy level from one system 40 between zeroand a finite amplitude in accordance with the output energy level from the other system and solely under the control thereof, and means for assembling the .controlled and controlling series of signals into a single new series of signals representative of the superimposed fields of view scanned by 'the-two scanning. systems.
  • the method of producing motion picture lm which comprises independently -scanning a ⁇ plurality of object areas toA produce from each scanning a series of electrical signals representative thereof, controlling the energy level Aof one only of the series of electrical signals in accordance With'the presence andabsence o fsignals Ain the other series of electrical signals, de-
  • the method of transmitting television signals comprising the steps of independently scanning a background and 'a foreground area to pro-Uv depictan independent trainy of energy impulses' lfronreach scanning area according to a 'pre-1.l established ⁇ pattern of scanning, equalizing in time relationship the period of production of energy impulses so that the timey duration' of signals resulting from-each scanning is such that' eectivelythe background and foreground areas scanned have equali and similar size boundaries,
  • wl and foreground areas are indep means for synchronously scann to produce independent video i ing the foreground and backgrc to' co-ordinate in time relation of each of the' produced centre means for reducing the signal .l of signals representingthe bach ing time periods of presence -.vision image signals which con ently and separately scanning Va a foreground area-synchronously each scanning a series of signe of each scanned area, utilizing prised series of signals to contro other series during periods of pre trolling signal, and adding to tl ries of signals the resultant coi signals.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Studio Circuits (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Image Analysis (AREA)
US640616A 1932-11-01 1932-11-01 Television system Expired - Lifetime US2073370A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
FR767445D FR767445A (enrdf_load_stackoverflow) 1932-11-01
NL39575D NL39575C (enrdf_load_stackoverflow) 1932-11-01
US640616A US2073370A (en) 1932-11-01 1932-11-01 Television system
GB29327/33A GB417282A (en) 1932-11-01 1933-10-23 Improvements in or relating to television and like picture transmitting systems
DE1933R0089113 DE691237C (de) 1932-11-01 1933-11-01 Fernseheinrichtung fuer die Abtastung zweier raeumlich getrennter Gegenstaende

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US640616A US2073370A (en) 1932-11-01 1932-11-01 Television system

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US2073370A true US2073370A (en) 1937-03-09

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US640616A Expired - Lifetime US2073370A (en) 1932-11-01 1932-11-01 Television system

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US (1) US2073370A (enrdf_load_stackoverflow)
DE (1) DE691237C (enrdf_load_stackoverflow)
FR (1) FR767445A (enrdf_load_stackoverflow)
GB (1) GB417282A (enrdf_load_stackoverflow)
NL (1) NL39575C (enrdf_load_stackoverflow)

Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2472535A (en) * 1943-04-29 1949-06-07 Pye Ltd Electric remote-control or indicating system
US2474297A (en) * 1946-01-16 1949-06-28 Fed Telephone & Radio Corp Combination televeision receiver and picture projector
US2490561A (en) * 1946-06-20 1949-12-06 Jr William Ussler Television picture mixing circuit
US2531031A (en) * 1947-09-24 1950-11-21 Tele Ind S A R L Television device for recording motion pictures thereof
US2531831A (en) * 1947-10-29 1950-11-28 Rca Corp Method of image transmission
US2538503A (en) * 1946-05-31 1951-01-16 Rca Corp Television signal monitoring equipment
US2566509A (en) * 1946-12-19 1951-09-04 Rca Corp Television camera with indicator
US2568166A (en) * 1948-04-23 1951-09-18 Perry David Phillips Television image superimposition
US2594383A (en) * 1948-09-29 1952-04-29 Rca Corp Registration monitoring
US2607845A (en) * 1947-08-20 1952-08-19 Technicolor Motion Picture Motion-picture photography and monitoring system for color television
US2610246A (en) * 1949-12-30 1952-09-09 Rca Corp Composite picture television
US2611819A (en) * 1949-02-26 1952-09-23 Rca Corp Television signal control system
US2612553A (en) * 1947-12-27 1952-09-30 John H Homrighous Television system
US2624798A (en) * 1948-03-23 1953-01-06 Mergenthaler Linotype Gmbh Photocomposing machine
US2648723A (en) * 1948-12-30 1953-08-11 Rca Corp Inspection system
US2658102A (en) * 1949-12-31 1953-11-03 Rca Corp Color micro-facsimile system
US2725423A (en) * 1951-02-28 1955-11-29 Rca Corp Apparatus for positioning television images in multiple camera systems
US2737730A (en) * 1950-02-10 1956-03-13 Emi Ltd Apparatus for generating and reproducing electrical signals
US2745901A (en) * 1951-07-11 1956-05-15 Freeman H Owens Television apparatus and optical system
US2784246A (en) * 1951-04-10 1957-03-05 Gen Electric Electrical system
US2797612A (en) * 1950-03-04 1957-07-02 Oscar J Holmes Intermittent motion picture film feed apparatus
US2822720A (en) * 1951-08-01 1958-02-11 Douglas Newhall Method of image reproduction and control
US2859538A (en) * 1954-02-05 1958-11-11 Communications Patents Ltd Cathode ray tube display systems or apparatus
US2874213A (en) * 1954-06-29 1959-02-17 Rca Corp Multiplex transmission
US2944109A (en) * 1953-12-07 1960-07-05 Martin E Evans Combined sound and color motion picture and television recording apparatus
US2961920A (en) * 1957-03-15 1960-11-29 Rca Corp Composite photography
US2962547A (en) * 1951-08-01 1960-11-29 Douglas Newhall Position control of television images
US2972141A (en) * 1956-06-15 1961-02-14 Gilfillan Bros Inc System and method for remote radar data transmission and coordinated assembly at a central station
US2985064A (en) * 1957-03-15 1961-05-23 Rca Corp Composite photography
US2985065A (en) * 1957-03-15 1961-05-23 Rca Corp Composite photography
US3037422A (en) * 1957-03-15 1962-06-05 Rca Corp Composite photography
US3071875A (en) * 1959-02-12 1963-01-08 Gen Precision Inc Method and means for correcting parallax
US3089917A (en) * 1961-08-21 1963-05-14 Anthony J Fernicola Means and method for stereoscopic television viewing
US3190955A (en) * 1961-04-20 1965-06-22 Westworld Artists Productions Method and apparatus for producing animated cartoons
US3234665A (en) * 1961-11-06 1966-02-15 Honeywell Inc Simulated periscope apparatus
US3278676A (en) * 1958-05-07 1966-10-11 Precon Process And Equipment C Apparatus for producing visual and auditory stimulation
US4395600A (en) * 1980-11-26 1983-07-26 Lundy Rene R Auditory subliminal message system and method
US4530009A (en) * 1980-11-20 1985-07-16 Kabushiki Kaisha Kobe Seiko Sho Image information synthesizing terminal equipment
US4769707A (en) * 1987-05-20 1988-09-06 Fuji Television Incorporated TV optical effect generating system
US5623581A (en) * 1996-01-22 1997-04-22 Apbi Interactive Kiosk Systems Direct view interactive photo kiosk and image forming process for same
US6148148A (en) * 1989-02-28 2000-11-14 Photostar Limited Automatic photobooth with electronic imaging camera

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1028613B (de) * 1937-02-02 1958-04-24 Fernseh Gmbh Schaltungsanordnung zur UEberblendung von Fernseh-Videosignalen
GB501966A (en) * 1937-06-07 1939-03-07 Alan Dower Blumlein Improvements in or relating to television systems

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2472535A (en) * 1943-04-29 1949-06-07 Pye Ltd Electric remote-control or indicating system
US2474297A (en) * 1946-01-16 1949-06-28 Fed Telephone & Radio Corp Combination televeision receiver and picture projector
US2538503A (en) * 1946-05-31 1951-01-16 Rca Corp Television signal monitoring equipment
US2490561A (en) * 1946-06-20 1949-12-06 Jr William Ussler Television picture mixing circuit
US2566509A (en) * 1946-12-19 1951-09-04 Rca Corp Television camera with indicator
US2607845A (en) * 1947-08-20 1952-08-19 Technicolor Motion Picture Motion-picture photography and monitoring system for color television
US2531031A (en) * 1947-09-24 1950-11-21 Tele Ind S A R L Television device for recording motion pictures thereof
US2531831A (en) * 1947-10-29 1950-11-28 Rca Corp Method of image transmission
US2612553A (en) * 1947-12-27 1952-09-30 John H Homrighous Television system
US2624798A (en) * 1948-03-23 1953-01-06 Mergenthaler Linotype Gmbh Photocomposing machine
US2568166A (en) * 1948-04-23 1951-09-18 Perry David Phillips Television image superimposition
US2594383A (en) * 1948-09-29 1952-04-29 Rca Corp Registration monitoring
US2648723A (en) * 1948-12-30 1953-08-11 Rca Corp Inspection system
US2611819A (en) * 1949-02-26 1952-09-23 Rca Corp Television signal control system
US2610246A (en) * 1949-12-30 1952-09-09 Rca Corp Composite picture television
US2658102A (en) * 1949-12-31 1953-11-03 Rca Corp Color micro-facsimile system
US2737730A (en) * 1950-02-10 1956-03-13 Emi Ltd Apparatus for generating and reproducing electrical signals
US2797612A (en) * 1950-03-04 1957-07-02 Oscar J Holmes Intermittent motion picture film feed apparatus
US2725423A (en) * 1951-02-28 1955-11-29 Rca Corp Apparatus for positioning television images in multiple camera systems
US2784246A (en) * 1951-04-10 1957-03-05 Gen Electric Electrical system
US2745901A (en) * 1951-07-11 1956-05-15 Freeman H Owens Television apparatus and optical system
US2822720A (en) * 1951-08-01 1958-02-11 Douglas Newhall Method of image reproduction and control
US2962547A (en) * 1951-08-01 1960-11-29 Douglas Newhall Position control of television images
US2944109A (en) * 1953-12-07 1960-07-05 Martin E Evans Combined sound and color motion picture and television recording apparatus
US2859538A (en) * 1954-02-05 1958-11-11 Communications Patents Ltd Cathode ray tube display systems or apparatus
US2874213A (en) * 1954-06-29 1959-02-17 Rca Corp Multiplex transmission
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Also Published As

Publication number Publication date
DE691237C (de) 1940-05-20
GB417282A (en) 1934-10-02
NL39575C (enrdf_load_stackoverflow)
FR767445A (enrdf_load_stackoverflow) 1934-07-16

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