US2394857A - Electron ray indicating device - Google Patents

Electron ray indicating device Download PDF

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Publication number
US2394857A
US2394857A US423705A US42370541A US2394857A US 2394857 A US2394857 A US 2394857A US 423705 A US423705 A US 423705A US 42370541 A US42370541 A US 42370541A US 2394857 A US2394857 A US 2394857A
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US
United States
Prior art keywords
anode
tube
pair
cathodes
ray
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US423705A
Inventor
Hultquist J Albert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RCA Corp
Original Assignee
RCA Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to BE507046D priority Critical patent/BE507046A/xx
Priority to BE501568D priority patent/BE501568A/xx
Priority to NL76700D priority patent/NL76700C/xx
Priority to NL81844D priority patent/NL81844C/xx
Priority to BE513971D priority patent/BE513971A/xx
Priority to BE501567D priority patent/BE501567A/xx
Priority to NL7312698.A priority patent/NL159457B/en
Priority to DEST19796A priority patent/DE1252326B/de
Priority to NL78923D priority patent/NL78923C/xx
Priority to NL89130D priority patent/NL89130C/xx
Priority to BE504546D priority patent/BE504546A/xx
Priority to NL7811513.A priority patent/NL168257B/en
Priority to BE512116D priority patent/BE512116A/xx
Priority to US346918A priority patent/US2317460A/en
Application filed by RCA Corp filed Critical RCA Corp
Priority to US423705A priority patent/US2394857A/en
Priority to US606830A priority patent/US2513908A/en
Application granted granted Critical
Publication of US2394857A publication Critical patent/US2394857A/en
Priority to DEL14079U priority patent/DE1790489U/en
Priority to DEL3021A priority patent/DE950945C/en
Priority to DEL6265A priority patent/DE950946C/en
Priority to US209146A priority patent/US2749465A/en
Priority to CH293273D priority patent/CH293273A/en
Priority to CH299070D priority patent/CH299070A/en
Priority to GB3818/51A priority patent/GB727133A/en
Priority to GB4468/51A priority patent/GB700192A/en
Priority to FR1033240D priority patent/FR1033240A/en
Priority to FR61447D priority patent/FR61447E/en
Priority to DEL8579A priority patent/DE973132C/en
Priority to GB15488/51A priority patent/GB703660A/en
Priority to FR65210D priority patent/FR65210E/en
Priority to DEL10017A priority patent/DE967560C/en
Priority to GB26285/51A priority patent/GB742466A/en
Priority to FR65361D priority patent/FR65361E/en
Priority to US256941A priority patent/US2712612A/en
Priority to GB28149/51A priority patent/GB721460A/en
Priority to DET5400A priority patent/DE909008C/en
Priority to FR1059872D priority patent/FR1059872A/en
Priority to GB7382/52A priority patent/GB730548A/en
Priority to GB19518/53A priority patent/GB737668A/en
Priority to US307188A priority patent/US2820916A/en
Priority to FR65462D priority patent/FR65462E/en
Priority to DES31179A priority patent/DE1029940B/en
Priority to DEP13761A priority patent/DE1038201B/en
Priority to GB25960/56A priority patent/GB838078A/en
Priority to US645746A priority patent/US2927237A/en
Priority to DEST16366A priority patent/DE1121234B/en
Priority to US101296A priority patent/US3161800A/en
Priority to GB13575/61A priority patent/GB978223A/en
Priority to FR858793A priority patent/FR1286382A/en
Anticipated expiration legal-status Critical
Priority to DE19661564490 priority patent/DE1564490B1/en
Priority to AT119967A priority patent/AT269298B/en
Priority to SE1761/67A priority patent/SE313122B/xx
Priority to NL6701866A priority patent/NL6701866A/xx
Priority to CH187367A priority patent/CH455948A/en
Priority to GB5965/67A priority patent/GB1165995A/en
Priority to ES336625A priority patent/ES336625A1/en
Priority to FR94634A priority patent/FR1511277A/en
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/78—Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
    • C07D213/86—Hydrazides; Thio or imino analogues thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
    • H01J31/14—Magic-eye or analogous tuning indicators
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/12—Electrically-operated arrangements for indicating correct tuning
    • H03J3/14—Visual indication, e.g. magic eye

Description

Feb. 12, 194e. J, A, HULTQUIST 2,394,857
ELECTRON RAY INDICATING DEVICE Original Filed July 23, 1940 ATTORNEY Patented Feb. 12, i946 ELECTRUN RAY ENDICATKNG DEVICE l?. Albert Hultquist, Scarsdale, N. Y., assigner to Radio Corporation of America, a corporation of Delaware (Cl. Z50-27.5)
4 Claims.
This invention relates to electron ray indicator tubes and is a division of my copending application, Serial #345,918, led July 23, 1940.
In frequency modulation receivers it is eX- tremely important that the receiver be tuned to the exact center of deviation of the transmitted wave in order to avoid distortion and noise. Previously known systems, of which I am aware, for indicating correct tuning of frequency modulation receivers depend on the use of a meter or electron ray tube so connected as to give an indication proportional to the voltage developed on the grid of the limiter stage in the receiver, avery sensitive zero center voltmeter across the output of the discriminator stage, or a dual shadowY electron ray tube with one of its associated amplifiers connected to one end o-f the discriminator" output circuit and the other connected as a phase inverter. Correct tuning in the first mentioned system is indicated by a maximumgrid potential or a closure of the shadow of the electron ray tube. However, this system is rather insensitive to variations in tuning since the response characteristic of the tuned circuits in the receiver is quite broad. It is, therefore, difficult to adjust the receiver for equal response to equal frequency deviations on each side of the midfrequency. Furthermore, the maximum response at this point in the receiver has no relation to the tuning of the discriminator stage and ifany change in tuning takes place there the tuning indicator can no longer be relied upon.
VZin theI last of the above mentioned systems proper tuning is indicated by equal sized shadow areas on both sides of the tube. The comparison of a two shadow area is attended with some difficulty since the broadest parts of the shadows are separated by a considerable distance.
The use of a Zero center Voltmetcr overcomes the foregoing disadvantages but it is expensive and easily damaged.
-An object, therefore, of the present invention is to overcome the above mentioned difficulties.
A further object of the present invention is the provision of a simple, inexpensive system for indicating correct tuning of a frequency modulation receiver, l
Another object of the present invention is the provision of an electron ray structure for giving an indication of the relative intensities of a pair ofpotentials in the form of substantially triangular shadow/ areas with variable length bases, said bases' being closely adjacent for ready comparison;
" Still a further object is the comparison of the relative magnitudes of a pair of independent potentials.
The foregoing objects, and others which may hereafter appear, are attained by providing a novel form of electron ray indicator tube having a luminous coating 0n an anode in the form of a pair of intersecting plane surfaces between a pair of separate emitting cathodes and shadow control electrodes. The line of intersection of the planes is in a plane perpendicular to a line between said cathodes. Electron beams `from each of the cathodes impinging on the adjacent surface of the anode cause the luminous material thereon to fluoresce. The control electrodes cast triangular shadows on the anode, the width of the shadow at the apex of the anode being proportional to the Voltage applied to the ray control electrodes. Since the widest parts of the shadows are closely adjacent they may be readily compared.
The present invention may also be embodied in a pair of conventional single shadow electron ray tubes with their areas placed as closely adjacent as possible, or a tube of the type disclosed in a prior Roberts Patent #2,175,700, granted October l0, 1939, may be utilized, interposing between the end of the tube and the eye of the observer a pair of reversing prisms so that the widest parts of the shadows appear adjacent to each other.
The present invention will be more fully understood by reference to the following detailed description, which is accompanied by a drawing in which Figure 1 is a circuit diagram illustrating the application of my invention to the discriminator circuit of a frequency modulation receiver; Figure 2 is an end View of an embodiment of the present invention and illustrates the indication given when employed in a circuit as shown in Figure 1; Figure 3 is a View partly in section of the embodiment of Figure 2, while Figure 4 illustrates a modication of the invention.
In Figure 1, I indicates generally a discriminator transformer of the frequency modulation receiver. Frequency modulated signals of a constant amplitude are applied to the primary II. To the secondary I2 of the transformer are connected the anodes of rectifier tube I4. The windings of the transformer are tuned to the desired frequency by means of adjustable condensers I3, i3. Across the cathodes of rectifier I4 is connected an output circuit comprising resistors I5, l5 shunted by'radio frequency bypass condensers Il, I8.'V One end of the output circuit is grounded and the other end is connected to an audio frevention and the theory of its operation will notl here be gone into. However, itis important lto understand that when the circuit is properly tuned to a signal to be receivedjthepotential across resistor I is equal inmagnitudeand-op.
posite in polarity to that across resistor I6. Therefore, no D. C. potential dierence exists between lead and ground. On one side ,of resonance 23 will become positive due to anfincrease in potential across resistor I5 and a decrease across resistor IG, while on the otherside oi?v resonance the reverse .condition will .beetrue The theory of operation of the discriminator. cire.
cui,t ism ore completely discussedk inta-*Seeley Patent #2,121,103, .granted- June-2l,V 19,38, and
ref erenceinay be made to thatv patent for a iur ther disclosure.`
Through a decouplingcircuit 25,.-.2614 agridZ'I ofV anamplifier; and' phase inverted tube is connected to the upper end ofv load circuit I5.. I6.
The time-constant of circuit 25, 2l;y shouldbe high enough that, the-.audio frequency signalis-.filftered out and doesnot appear on grid 2l.,V Dual triodeampliiier tube 28, may, ofcourse, be..=re
placedby a` pair yof .physicallyseparate triodesJv if .'desired. Anodes 29 .and3Il--of the amplifier tubrewv28.- are connectedl to the positive sides rotta, v
source-v of.. anode potential indicated as; B+. through resistors 3I and32.k Thefothensidednf the anode potential source is grounded. The cathodes are connected together and to ground. through resistor 39.`
Indicatortube 33 has rayvcontrol electrodes. 34 and 35 connectedto anodes-sZS andz, respeca tively.V The `anode l 36 of; indicatory tube 33 andl its eathodes 311,; 38,. are@ connected'- te, the anode supply source- .inrthe .eQnyeriiier.1elv mamler-v The magnitudes of. plate resistors 31;. 32@andthe.corri-y rnonfcatliode lresistor; ,39, associated with tube v2 8 arreso-adjusted; that with no Vpotential onggrid 21, equal potentials, somewhat lower thanlthe potentiellen, anode or; target.- 35, are impressed on ray. control. electrodes. Y34,135. Ofinclicator tube-...33. The f. shadows Cast 0n. the luminous surfaces-oi enodei therefore. of,- equelsize. asshownin Figurez, When grid21 has a poStVepotential applied thereto.. the. plate current threliehf,refV sister- 3 IA increases causnefeentrolencender-34ste become more negative thus4 increasing the vwiel/th of the shadow; castv thereby on. luminnisV surface of; anodel. The increased currentfflow; through resistor 'rcauses the grid. 2,1 of. ft11e,:phaseinev verter tube 28 to become leffectiveliimore negen tive with respectggto an,odejll,A decreasing KV,the anodecurrentthrough yresistory32., Thepotentialon ray controlelectrode 35 ofr indicator tube 33.- thereiore :becomes more positive..` decreasing the .Width of; its .shadow mrthe -1umine11.s; surface ofanode 3B., The reverseactiontakesplace when grid21 has a negative potential appliedthereto.
It will be notedthat a pair oftriangularshadows are vformed having closely adjacent variable length bases. It will` be readily. seen thatit is very easy to Adetermine by inspection the; relative sizes of thebases of the two` triangles). perfect resonance being indicatedby the shadowedges cast by the two ray control electrodes 34, 35 being exactly adj-acent.
When the receiver is tuned to a frequency remote from any incoming signal the same indication is obtained. As the tuning of the receiver is varied and resonance with a received signal is approached. the lengthxoi thefbase op one of the shaded'areas increases and that of' the other decreases until a certain ratio, dependent upon the constants of the circuits and the strength of the-signal,.is attained. Then as resonance is still more closely approached the larger shaded area decreases in size and the smaller one increases until'thebase lengths are again equal. The receiver is 'thencorrectly tuned. Upon a contintion. The 4form` of. the, bil-pianar anodeor-target 36 is clearly show-n inthis iigure.- Ray rcontrol electrodes 34 and 35 yand cathodes 31 and .38farex constructed yin` the same f manner 'as .described in the heretofore mentioned-Roberts` patent. rLike,y wiseshieldingcaps 40 and 4I are provided Vover,
the ends of the cathode and rayl controlaelec trodes inA order to shield the .eyeA of the'observerz from the direct light .offthecathodes.andimorder` toprevent fluorescence of the.glass:enveloppenn If desired, semiecylindrical shells.. supporting caps 40 .and4 4I may be substitutecl.forV
ofthe tube.
supporting rods 43 in; order f tofrprevent -luores--v cenceon-the sides of the-glass envelope-142.2, Fur#` therrnore, insome casesfit, may -be-desirableto.
provide arl-ow wall/ bisectingj the. externalA sangle.. between the planesI `of4 anode 3 6 Afor; this esame purpose, and to preventv a. spill-over?? Vof .-iiuore" esoerice at` the.A apex oftheanode. Thefwall, be-A ingl thin, andA in aplane parallel ,totthefline-of sight. of `the observer r,causes-nowobstructionatof visions Grids 31 andy38( mayfsurround.cath?,4
odes. 3l .and 38: for limiting the space-current. drawn from the cathodeseii,desir-ed..v The rele:
ments. withiny the glass envelopeAZ .are supportedv in` position lay-support rodsA 5A and Vmica-discsffA-G..v
as is customary f practice ine the .,construction` ofI thermionic discharge tubes.
A moolication of. thepresent'v invention is; shown, inv Figure -,4- wherein; an electron rayetubev of the typeV showndnl the vRoberts.--.-Pate nt #2,175,700 isused in thefcircuit; shown -in Figure 1. Thetube is indicated generallyffbygreference character-5'ILV Inorder to causetheabroadest parts of: theshadow areas. tolappear, fadjacentpa.v
ditionA of jthe` indicatingussystem. mayl Ibeliad by:
tuning the.. receiver awayv from ,fanyssignal 01111034 removing the rectifier tube I4. The absence oaV wenn.'
diamondshaped shadowarea `as .shownen meure 2 indicates that the balance of the indicating circuit has become disturbed through variation of the circuit elements or aging of the tubes. Resistors 3| and 32 must be varied to again arrive at a balance or amplifier tube 28 and/or indicator tube 33 replaced.
I claim:
l. A thermionic discharge tube having an anode in the form of a pair of intersecting planes, said anode having a luminescent material thereon; a pair of cathodes, one adjacent each anode plane, for directing a stream of electrons on dliferent surfaces of said anode whereby said areas become luminous, the line of intersection of the planes of said anode being normal to a line connecting said cathodes, ray control electrodes adapted to cast triangular shadows on the luminous areas of said anode, one ray control electrode being located between each of said cathodes and said anode and operative to control the length of the base of the triangular shadow cast thereby in proportion to potentials applied to said ray control electrode.
2. A thermionic discharge tube having an anode in the form of a pair of intersecting plane surfaces, said anode having a luminescent material thereon, a pair of cathodes adjacent said f control electrodes.
3. A thermionic discharge tube having an anode in the form of a pair of intersecting plane surfaces, said anode having a luminescent material thereon, a pair of cathodes one on each side of the intersection of said plane surfaces, an
imaginaryrline connecting said cathodes/inter- Y seating said plane surfaces, and ray control electrodes positioned along said imaginary line and located between said cathodes.
4. A thermionic discharge tube having a dihedral anode, said anode having a luminescent surface, a pair of electron sources one on each side of an intersection of the planes of said dihedral anode, and a ray control electrode positioned between each electron source and said anode.
J. ALBERT HULTQUIST.
US423705A 1940-07-23 1941-12-20 Electron ray indicating device Expired - Lifetime US2394857A (en)

Priority Applications (56)

Application Number Priority Date Filing Date Title
BE507046D BE507046A (en) 1940-07-23
BE501568D BE501568A (en) 1940-07-23
NL76700D NL76700C (en) 1940-07-23
NL81844D NL81844C (en) 1940-07-23
BE513971D BE513971A (en) 1940-07-23
BE501567D BE501567A (en) 1940-07-23
NL7312698.A NL159457B (en) 1940-07-23 CONNECTOR FOR A SPACE TRADE WORK.
DEST19796A DE1252326B (en) 1940-07-23
NL78923D NL78923C (en) 1940-07-23
NL89130D NL89130C (en) 1940-07-23
BE504546D BE504546A (en) 1940-07-23
NL7811513.A NL168257B (en) 1940-07-23 PRESSURE AEROSOL PREPARATION AND HOLDER WITH AEROSOL PREPARATION.
BE512116D BE512116A (en) 1940-07-23
US346918A US2317460A (en) 1940-07-23 1940-07-23 Electron ray indicating device
US423705A US2394857A (en) 1940-07-23 1941-12-20 Electron ray indicating device
US606830A US2513908A (en) 1940-07-23 1945-07-24 Electric discharge device of the indicator type
DEL14079U DE1790489U (en) 1940-07-23 1950-07-08 THERMOMETER-LIKE VOLTAGE INDICATOR TUBE.
DEL3021A DE950945C (en) 1940-07-23 1950-07-09 Voltage indicator tubes, in particular tuning indicator tubes for radio equipment, with a display system and a further, independent electrode system for other purposes
DEL6265A DE950946C (en) 1940-07-23 1950-11-12 Voltage comparison indicator tubes
US209146A US2749465A (en) 1940-07-23 1951-02-02 Visual indicating device for electric voltages
CH293273D CH293273A (en) 1940-07-23 1951-02-06 Optical display device for electrical voltages, particularly used for tuning display.
CH299070D CH299070A (en) 1940-07-23 1951-02-06 Optical display device for electrical voltages, in particular for voting display in radio devices.
GB3818/51A GB727133A (en) 1940-07-23 1951-02-16 Electron discharge device for visually indicating voltages
GB4468/51A GB700192A (en) 1940-07-23 1951-02-23 Improvements in or relating to visual tuning indicator electron discharge tubes
FR1033240D FR1033240A (en) 1940-07-23 1951-02-28 Optical indicating device for electrical voltage, in particular for indicating tuning in t devices. s. f.
FR61447D FR61447E (en) 1940-07-23 1951-02-28 Optical indicating device for electrical voltage, in particular for indicating tuning in t.s.f.
DEL8579A DE973132C (en) 1940-07-23 1951-03-21 Voltage comparison indicator tubes
GB15488/51A GB703660A (en) 1940-07-23 1951-06-29 Voltage indicator tube, particularly tuning indicator tube
FR65210D FR65210E (en) 1940-07-23 1951-07-06 Optical indicating device for electrical voltage, in particular for indicating tuning in t.s.f.
DEL10017A DE967560C (en) 1940-07-23 1951-09-06 Optical indicator tubes for electrical voltages
GB26285/51A GB742466A (en) 1940-07-23 1951-11-02 Voltage indicator tube
FR65361D FR65361E (en) 1940-07-23 1951-11-09 Optical indicating device for electrical voltage, in particular for indicating tuning in t.s.f.
US256941A US2712612A (en) 1940-07-23 1951-11-10 Voltage reference indicating valve
GB28149/51A GB721460A (en) 1940-07-23 1951-11-30 Voltage indicating valve
DET5400A DE909008C (en) 1940-07-23 1951-12-06 Voting indicator tubes
FR1059872D FR1059872A (en) 1940-07-23 1952-03-20 Indicator tubes and voltage comparators
GB7382/52A GB730548A (en) 1940-07-23 1952-03-21 Tuning indicator valve
GB19518/53A GB737668A (en) 1940-07-23 1952-08-01 Tuning indicator valve of small dimension and a high sensitivity
US307188A US2820916A (en) 1940-07-23 1952-08-30 Tuning indicator valve of small dimension and a high sensitivity
FR65462D FR65462E (en) 1940-07-23 1952-09-01 Optical indicating device for electrical voltages, in particular for indicating tuning in t.s.f.
DES31179A DE1029940B (en) 1940-07-23 1952-11-24 Dry rectifier system with tablet-shaped rectifier elements
DEP13761A DE1038201B (en) 1940-07-23 1955-03-14 Voltage indicator tubes
GB25960/56A GB838078A (en) 1940-07-23 1956-08-24 Thermometer type voltage indicator tube
US645746A US2927237A (en) 1940-07-23 1957-03-13 Voltage indicator tubes
DEST16366A DE1121234B (en) 1940-07-23 1960-04-16 Display tubes with two display systems
US101296A US3161800A (en) 1940-07-23 1961-04-06 Indicator tube having two indication systems
GB13575/61A GB978223A (en) 1940-07-23 1961-04-14 Voltage indicator tube having two indicator systems
FR858793A FR1286382A (en) 1940-07-23 1961-04-14 Cathode indicator tube
DE19661564490 DE1564490B1 (en) 1940-07-23 1966-02-11 Display tubes for two voltages
AT119967A AT269298B (en) 1940-07-23 1967-02-08 Display tube (magic eye) for the optical differentiation of a monaural from a stereo signal
SE1761/67A SE313122B (en) 1940-07-23 1967-02-08
NL6701866A NL6701866A (en) 1940-07-23 1967-02-08
CH187367A CH455948A (en) 1940-07-23 1967-02-08 Display tube for the optical differentiation of a monaural from a stereo signal
GB5965/67A GB1165995A (en) 1940-07-23 1967-02-08 Cathode Ray Indicator Tube
ES336625A ES336625A1 (en) 1940-07-23 1967-02-09 Electron ray indicating device
FR94634A FR1511277A (en) 1940-07-23 1967-02-13 Cathodic indicator

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
US346918A US2317460A (en) 1940-07-23 1940-07-23 Electron ray indicating device
US423705A US2394857A (en) 1940-07-23 1941-12-20 Electron ray indicating device
DE703660X 1950-07-08
DEL14079U DE1790489U (en) 1940-07-23 1950-07-08 THERMOMETER-LIKE VOLTAGE INDICATOR TUBE.
DE742466X 1950-11-11
DE737668X 1951-09-05
DEST16366A DE1121234B (en) 1940-07-23 1960-04-16 Display tubes with two display systems
DEP0038757 1966-02-11

Publications (1)

Publication Number Publication Date
US2394857A true US2394857A (en) 1946-02-12

Family

ID=32913417

Family Applications (6)

Application Number Title Priority Date Filing Date
US346918A Expired - Lifetime US2317460A (en) 1940-07-23 1940-07-23 Electron ray indicating device
US423705A Expired - Lifetime US2394857A (en) 1940-07-23 1941-12-20 Electron ray indicating device
US209146A Expired - Lifetime US2749465A (en) 1940-07-23 1951-02-02 Visual indicating device for electric voltages
US256941A Expired - Lifetime US2712612A (en) 1940-07-23 1951-11-10 Voltage reference indicating valve
US307188A Expired - Lifetime US2820916A (en) 1940-07-23 1952-08-30 Tuning indicator valve of small dimension and a high sensitivity
US101296A Expired - Lifetime US3161800A (en) 1940-07-23 1961-04-06 Indicator tube having two indication systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US346918A Expired - Lifetime US2317460A (en) 1940-07-23 1940-07-23 Electron ray indicating device

Family Applications After (4)

Application Number Title Priority Date Filing Date
US209146A Expired - Lifetime US2749465A (en) 1940-07-23 1951-02-02 Visual indicating device for electric voltages
US256941A Expired - Lifetime US2712612A (en) 1940-07-23 1951-11-10 Voltage reference indicating valve
US307188A Expired - Lifetime US2820916A (en) 1940-07-23 1952-08-30 Tuning indicator valve of small dimension and a high sensitivity
US101296A Expired - Lifetime US3161800A (en) 1940-07-23 1961-04-06 Indicator tube having two indication systems

Country Status (10)

Country Link
US (6) US2317460A (en)
AT (1) AT269298B (en)
BE (6) BE504546A (en)
CH (1) CH455948A (en)
DE (4) DE1790489U (en)
ES (1) ES336625A1 (en)
FR (7) FR61447E (en)
GB (10) GB727133A (en)
NL (7) NL6701866A (en)
SE (1) SE313122B (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2513908A (en) * 1940-07-23 1950-07-04 Gen Electric Electric discharge device of the indicator type
US2594025A (en) * 1949-09-09 1952-04-22 Siemens Ag Electron tube with luminescent shield, especially tuning tube
US2600063A (en) * 1951-02-20 1952-06-10 Leon S Maloof Visual electron flow indicator
US2736834A (en) * 1951-08-10 1956-02-28 Hartford Nat Bank & Trust Co Electron discharge tube comprising a luminescent screen
US2767341A (en) * 1952-08-12 1956-10-16 Dunlee Corp Anode structure for double filament x-ray tube
DE950946C (en) * 1940-07-23 1956-10-18 Lorenz C Ag Voltage comparison indicator tubes
DE959481C (en) * 1952-02-08 1957-03-07 Philips Patentverwaltung Electron beam tuning indicator tubes
US2820916A (en) * 1940-07-23 1958-01-21 Int Standard Electric Corp Tuning indicator valve of small dimension and a high sensitivity
US2822494A (en) * 1952-03-20 1958-02-04 Philips Corp Electron beam-tuning-indication tube
DE1029490B (en) * 1952-10-01 1958-05-08 Telefunken Gmbh Display tubes with two independently controllable deflection electrodes or electrode systems lying parallel to the cathode
DE973132C (en) * 1940-07-23 1959-12-10 Standard Elek K Lorenz Ag Voltage comparison indicator tubes
US2954493A (en) * 1959-06-08 1960-09-27 Sylvania Electric Prod Flip-flop indicator

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US2799790A (en) * 1951-05-19 1957-07-16 Int Standard Electric Corp Multi-range voltage indicating valve
BE519456A (en) * 1952-04-26
DE1059053B (en) * 1957-04-20 1959-06-11 Loewe Opta Ag Tuning display device with comparative tuning display for high-frequency receivers
DE1045557B (en) * 1957-07-04 1958-12-04 Tesla Np Tuning indicator tubes with laterally arranged luminous surfaces
GB2144575B (en) * 1983-08-05 1988-04-20 English Electric Valve Co Ltd Cathedolumanescent display arrangements

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US2219506A (en) * 1936-10-08 1940-10-29 Telefunken Gmbh Tuning indicator circuit
US2243034A (en) * 1937-06-03 1941-05-20 Hygrade Sylvania Corp Fluorescent indicating device
US2105818A (en) * 1937-06-22 1938-01-18 Rogers Radio Tubes Ltd Voltage indicating electron discharge tube
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US2243408A (en) * 1938-05-12 1941-05-27 Rca Corp Visual tuning indicator
BE434519A (en) * 1938-05-27
US2273800A (en) * 1939-08-09 1942-02-17 Hygrade Sylvania Corp Fluorescent type indicator tube
BE443535A (en) * 1940-05-10
US2927237A (en) * 1940-07-23 1960-03-01 Int Standard Electric Corp Voltage indicator tubes
US2513908A (en) * 1940-07-23 1950-07-04 Gen Electric Electric discharge device of the indicator type
DE1038201B (en) * 1940-07-23 1958-09-04 Philips Patentverwaltung Voltage indicator tubes
DE973132C (en) * 1940-07-23 1959-12-10 Standard Elek K Lorenz Ag Voltage comparison indicator tubes
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DE1059116B (en) * 1954-04-28 1959-06-11 Standard Elektrik Lorenz Ag Voting indicator tubes
GB829553A (en) * 1955-11-21 1960-03-02 Arthur Adams Cellular back loud-speaker enclosure

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2820916A (en) * 1940-07-23 1958-01-21 Int Standard Electric Corp Tuning indicator valve of small dimension and a high sensitivity
US2513908A (en) * 1940-07-23 1950-07-04 Gen Electric Electric discharge device of the indicator type
DE1121234B (en) * 1940-07-23 1962-01-04 Standard Elektrik Lorenz Ag Display tubes with two display systems
DE973132C (en) * 1940-07-23 1959-12-10 Standard Elek K Lorenz Ag Voltage comparison indicator tubes
DE950946C (en) * 1940-07-23 1956-10-18 Lorenz C Ag Voltage comparison indicator tubes
US2594026A (en) * 1949-09-09 1952-04-22 Siemens Ag Electron tube with luminescent shield, especially tuning tube
US2594025A (en) * 1949-09-09 1952-04-22 Siemens Ag Electron tube with luminescent shield, especially tuning tube
US2600063A (en) * 1951-02-20 1952-06-10 Leon S Maloof Visual electron flow indicator
US2736834A (en) * 1951-08-10 1956-02-28 Hartford Nat Bank & Trust Co Electron discharge tube comprising a luminescent screen
US2805352A (en) * 1952-02-08 1957-09-03 Philips Corp Cathode-ray tube for tuning indication
DE959481C (en) * 1952-02-08 1957-03-07 Philips Patentverwaltung Electron beam tuning indicator tubes
US2822494A (en) * 1952-03-20 1958-02-04 Philips Corp Electron beam-tuning-indication tube
US2767341A (en) * 1952-08-12 1956-10-16 Dunlee Corp Anode structure for double filament x-ray tube
DE1029490B (en) * 1952-10-01 1958-05-08 Telefunken Gmbh Display tubes with two independently controllable deflection electrodes or electrode systems lying parallel to the cathode
US2954493A (en) * 1959-06-08 1960-09-27 Sylvania Electric Prod Flip-flop indicator

Also Published As

Publication number Publication date
DE1252326B (en)
BE507046A (en)
AT269298B (en) 1969-03-10
GB721460A (en) 1955-01-05
US2317460A (en) 1943-04-27
US2712612A (en) 1955-07-05
DE1790489U (en) 1959-06-18
FR61447E (en) 1955-05-04
BE513971A (en)
SE313122B (en) 1969-08-04
FR65210E (en) 1956-02-07
NL89130C (en)
NL81844C (en)
GB703660A (en) 1954-02-10
NL168257B (en)
GB742466A (en) 1955-12-30
ES336625A1 (en) 1968-01-01
GB978223A (en) 1964-12-16
GB727133A (en) 1955-03-30
DE1564490B1 (en) 1970-08-20
FR1059872A (en) 1954-03-29
NL78923C (en)
BE501568A (en)
NL76700C (en)
GB730548A (en) 1955-05-25
FR1033240A (en) 1953-07-09
BE504546A (en)
US3161800A (en) 1964-12-15
FR1511277A (en) 1968-01-26
GB700192A (en) 1953-11-25
GB737668A (en) 1955-09-28
US2820916A (en) 1958-01-21
BE512116A (en)
CH455948A (en) 1968-05-15
BE501567A (en)
FR65361E (en) 1956-02-09
NL6701866A (en) 1967-08-14
GB838078A (en) 1960-06-22
NL159457B (en)
GB1165995A (en) 1969-10-01
FR65462E (en) 1956-02-21
US2749465A (en) 1956-06-05
DE1121234B (en) 1962-01-04

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