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US2167842A - Electron ray voltage indicator - Google Patents

Electron ray voltage indicator Download PDF

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Publication number
US2167842A
US2167842A US210335A US21033538A US2167842A US 2167842 A US2167842 A US 2167842A US 210335 A US210335 A US 210335A US 21033538 A US21033538 A US 21033538A US 2167842 A US2167842 A US 2167842A
Authority
US
United States
Prior art keywords
ray
control
cathode
voltage
grid
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
US210335A
Other languages
English (en)
Inventor
Keene S Jackson
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 NL54681D priority Critical patent/NL54681C/xx
Priority to BE434519D priority patent/BE434519A/fr
Priority to US198717A priority patent/US2175700A/en
Application filed by RCA Corp filed Critical RCA Corp
Priority to US210335A priority patent/US2167842A/en
Application granted granted Critical
Publication of US2167842A publication Critical patent/US2167842A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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

Definitions

  • My invention relates to visual voltage or tuning indicators of the electron ray type, particularly to tuning indicators for radio receiving sets.
  • a tuning indicator for radio receivers now in of electrons and the size of the shadow angles 6 and 1, represented in Figures 2.
  • Means are provided according to my invention for reducing shadow angle 6 to zero when the commercial use comprises an electron discharge level of the received carrier wave is low and for 5 device with a cathode coaxial with a dish-shaped closing shadow angle 1 only when the strength of anode or electron target interiorly coated with the received carrier is high.
  • the voltages applied fluorescent material which glows when bomto the ray-control electrodes are obtained rebarded by electrons.
  • Parallel to the cathode and pee vely frOm a Single Source Of voltage in the in the electron-path between the cathode and radio receiver proportional to the strength of the 10 if target is an electron ray-controlling electrode received carrier.
  • a common means for deriving connected to a voltage indicative of the resonant a direct current proportional to the strength of condition of the radio receiver.
  • the received carrier shown in Figure 1
  • comprises voltage applied to the ray-control electrode is a detector 8 in series with a load resistor 9 and 14 increased as the radio receiver is tuned to a the Secondary Winding of a transformer 0 15 carrier so that the electron shadow cast by the pled t0 the radio o e e frequency ray-control electrode on the target closes or 0111195 0f the radio receiver-
  • the v e gene reduces t a minimum and preferabl t ated across resistor 9 is applied, according to my 1 shadow angle is zero at resonance.
  • the voltage applied to the ray-control electrode Screen gridemplifier through filter resistor 20 may be taken from an automatic volume control T1115 ect current Yoltage if deslred circuit, the shadow angle, when adjusted to be applleii also to the gnds of amplifiers in the close on strong signals, will not completely close receiver through conductor for auto q to give accurate tuning indication on weak signals.
  • the object of my invention is a visual tuning Anode l5 and screen grid i6 are connected to a 1 indicator which will accurately indicate resonance voltage Source through resistors and 7 I gialzg'radio receiver for both stron and weak si ipace fi: m pn i tiu il t am s an screen gr respective y oug res s ors 32 2: 33? fis'ggzi gg g g sg gfi gg gzi and I9 and produces voltage drops which lower 30 ticmamy in the appended claims but the invem the voltage of ray-control electrodes-4 and 5 with respect to the target.
  • control grid ll determines the potential of r 35 l and 4 are diagrammatic representations of a anodes and I6 and the directly connected my- 85 j tunm indicat r t b d i b d control electrodesfi and 5.
  • the bias g o u t C m l S em 0 my on control grid H which is proportional to the t f Figure Is an end i of the vlsual carrier signal strength, controls the shadow indicator tube connected according to my invenangles 5 and-L 40 tion, and Figure 3 showscurves explanatory of The screen grid tube n is selected with a an .g
  • the plate current has a suiilciently low e I tron of America, comprises an envelope l enclosing value, when th control grid voltage 1 24 lt cathode 3 Coaxial with a dish-Shaped electron source I1 is 100 volts, and resistors l8 and to are target 2 interiorly sensitized with a material 200,000 ohms h, t t t had w angle 1 ap- 'f which glows when bombarded with electrons.
  • shadow angle 6 As the control grid voltage is gradually increased in a negative direction, indicative of approach to resonance, the shadow angle 6 rapidly decreases and'becomes zero at 9 volts. At this voltage, however, shadow angle 1 has not appreciably changed and closes gradually and becomes zero only at about -24 volts.
  • weak signals may be accurately tuned in by observing the closure angle at 6.
  • shadow angle 6 becomes zero and the carrier may be accurately tuned in by observing shadow angle I.
  • Good results have been obtained by adjusting the values of resistors 18 and I! to about 200,000 ohms each and the voltage of source I1 to 100 volts when applied to an amplifier of the 6K! type.
  • the difference between the .control grid voltage at which the two shadow angles become zero may be adjusted by changing the ratio of resistance of resistors l8 and
  • the tuning indicator embodying my invention comprises means for controlling the potentials of the two ray-control electrodes and for changing said potentials at diflercut rates in response to changes in the control grid voltage of the amplifier.
  • resistor 20 is connected between the voltage source and the anode of a conventional amplifier 2
  • the target is connected 5 to the high voltage end of the resistor and the my control electrodes are tapped tothe resistor at spaced points so that the shadow angles produced by ray-control electrodes 4 and 5 may be varied at different rates by thecontrol grid voltage of amplifier 2
  • the relative values of the two portions of resistor 20 may be readily determined.
  • the shadow angle of ray-control electrode 5 reduces to zero first with a negative grid bias voltage of 16.5 volts, and the shadow angle of ray-control electrode 4 reduces to zero with a 0 grid control bias of 27.5 volts where the amplinance in a radio receiver whether the level of the received carrier is high or low.
  • a visual indicator of variable voltages comprising a cathode. an electron target with a surf face facing said cathode which fluoresces with electron bombardment, two ray-control electrodes on opposite sides 01 sa d. a h de f r casti g an areas-m electron shadow on said target, means for controlling the potential of one of said ray-control electrodes, means for controlling the potential of the other of said ray-control electrodes, said control means comprising an amplifier for changing said potentials at difierent rates in response to changes of said variable voltage comprising a cathode, control electrode, screen grid, and anode, said anode and screen grid being separately connected to said ray-control electrodes, resistors connected between said ray-control electrode and target, said control electrode being biased by said variable voltage.
  • a visual indicator of variable voltages comprising a cathode, a target facing said cathode which fiuoresces upon electron bombardment, two spaced ray-control electrodes between said cathode and target, means for changing the potentials of said ray-control electrodes with respect to said cathode and target in response to said variable voltages comprising an amplifier with a cathode, control grid, screen grid, and
  • a visual indicator of variable voltages comprising acathode. a target facing said cathode which fluoresces upon electron bombardment,
  • control grid screen grid, and anode
  • a voltage source connected at one end to the amplifier cathode and connected at the other end through a resistor to said anode, said other end of the voltage source being connected to said screen" grid through a second resistoryone ray-control electrode being connected to said anode and the other ray-control electrode being connected to said screen grid, and means for impressing said variable voltages on said control grid.
  • a visual indicator of variable voltages comprising a cathode, a target facing said cathode which fiuore'sces upon electron bombardment, two spaced ray-control electrodes between said target and cathode, means for changing the potentials of said ray-control electrodes in response to said variable voltages comprising an amplifier with a cathode, control grid, screen grid and anode, a voltage source connected at one end to the amplifier cathode and connected at the other end to said target and through a resistor to said anode, the two ray-control electrodes being con- 'nected to spaced points on said resistor, and

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  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
US210335A 1938-03-29 1938-05-27 Electron ray voltage indicator Expired - Lifetime US2167842A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL54681D NL54681C (xx) 1938-05-27
BE434519D BE434519A (xx) 1938-05-27
US198717A US2175700A (en) 1938-03-29 1938-03-29 Electronic indicating device
US210335A US2167842A (en) 1938-05-27 1938-05-27 Electron ray voltage indicator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US210335A US2167842A (en) 1938-05-27 1938-05-27 Electron ray voltage indicator

Publications (1)

Publication Number Publication Date
US2167842A true US2167842A (en) 1939-08-01

Family

ID=22782498

Family Applications (1)

Application Number Title Priority Date Filing Date
US210335A Expired - Lifetime US2167842A (en) 1938-03-29 1938-05-27 Electron ray voltage indicator

Country Status (3)

Country Link
US (1) US2167842A (xx)
BE (1) BE434519A (xx)
NL (1) NL54681C (xx)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2449291A (en) * 1940-02-26 1948-09-14 Wilcox Gay Corp Recording apparatus volume level indicator
US2455437A (en) * 1943-11-13 1948-12-07 Distillation Products Inc Ionization gauge circuits
US2457575A (en) * 1944-05-23 1948-12-28 Rca Corp Voltage indicator
US2712612A (en) * 1940-07-23 1955-07-05 Lorenz C Ag Voltage reference indicating valve
US2784371A (en) * 1954-12-27 1957-03-05 Bell Aircraft Corp Fault tester for electron tubes
DE1059562B (de) * 1956-11-03 1959-06-18 Telefunken Gmbh Schaltung zur Spannungsanzeige mit Hilfe einer Anzeigeroehre

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2449291A (en) * 1940-02-26 1948-09-14 Wilcox Gay Corp Recording apparatus volume level indicator
US2712612A (en) * 1940-07-23 1955-07-05 Lorenz C Ag Voltage reference indicating valve
US2455437A (en) * 1943-11-13 1948-12-07 Distillation Products Inc Ionization gauge circuits
US2457575A (en) * 1944-05-23 1948-12-28 Rca Corp Voltage indicator
US2784371A (en) * 1954-12-27 1957-03-05 Bell Aircraft Corp Fault tester for electron tubes
DE1059562B (de) * 1956-11-03 1959-06-18 Telefunken Gmbh Schaltung zur Spannungsanzeige mit Hilfe einer Anzeigeroehre

Also Published As

Publication number Publication date
NL54681C (xx)
BE434519A (xx)

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