US2021891A - Double receiver tube for ultra short waves - Google Patents

Double receiver tube for ultra short waves Download PDF

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Publication number
US2021891A
US2021891A US678487A US67848733A US2021891A US 2021891 A US2021891 A US 2021891A US 678487 A US678487 A US 678487A US 67848733 A US67848733 A US 67848733A US 2021891 A US2021891 A US 2021891A
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US
United States
Prior art keywords
grid
tube
ultra short
short waves
receiver tube
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
US678487A
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English (en)
Inventor
Hollmann Hans Erich
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.)
Telefunken AG
Original Assignee
Telefunken AG
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
Application filed by Telefunken AG filed Critical Telefunken AG
Application granted granted Critical
Publication of US2021891A publication Critical patent/US2021891A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/163—Special arrangements for the reduction of the damping of resonant circuits of receivers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/26—Demodulation of amplitude-modulated oscillations by means of transit-time tubes

Definitions

  • R is the double receiver tube which, as well known from the earlier art, is inserted in a continuous parallel wire (Lecher wire) system which, at one end, has the receiving aerial D and which is capable of being tuned by the shifting ofthe bridge B.
  • the tube R differs from a normal receiving tube, according to the invention in that its electrodes are not continuous, but interrupted, a path for the flow of radio frequency oscillations being created between parts of grid and plate by the blocking condensers Ca and Cg.
  • the cathode K consists most suitably also of two parts which must be heated separately from each other in accordance with prevailing conditions.
  • the various electrode parts receive their supply voltages from both sides by way of the Lecher wires LL and the choke coils Dr and Dr.
  • the part located close to the antenna takes care of the damping reduction, whereas the other part is connected to act as a brake audion which in the grid circuit has as a load the transformer T for the modulation frequency.
  • brake voltage Vb so-called serves for the adjustment of the working point upon the (rectifying) characteristic, whereas for the oscillator part heating and grid voltage is variable.
  • the grid voltage the tube is tuned most accurately to the sending wave, while for the heating regeneration 5 is pushed to a point very close to oscillation initiation. It is suitable to operate the rectifier part with such a high or such a low grid potential that it will work away outside the electron resonance, since in that way reaction of demodula- 10 tion upon the damping reduction through the varying grid potential of the audion part is avoided.
  • the brake audion could be replaced also by standard tube rectifier circuit schemes. 15-
  • Figure 2 represents another embodiment of the double tube in that the block condensers Ca and Cg are constructionally united directly with the electrodes.
  • the grid and plate parts, on the anterior sides turned toward each 20 other have metallic rings Ta and T3 which are insulated from each other by mica annuli or a mica disk s, and which represent directly the capacities for a path of flow of the radio frequency energy.
  • the two cathodes in V-shape are introduced from 25 both sides into the grid and stayed in reference to each other by an intermediate piece. As to the rest the operation is the same as that of the double tube Figure 1.
  • the two electrode parts may be 30- adapted to their different functions they may also be dimensioned dissimilarly.
  • the basic idea of the invention holds also true of any desired electrode shape such as wire or planar (sheet) electrodes. 35
  • a vacuum tube comprising a first anode, grid and cathode and a second anode, grid and cathode both sets of electrodes being located Within a single evacuated envelope, said anodes and grids 40 being respectively coupled together capacitively and said cathodes directly.
  • a vacuum tube comprising a first anode, grid and cathode and a second anode, grid and cathode both sets of electrodes being located within a single evacuated envelope, said anodes and grids being respectively coupled together capacitively.
  • a vacuum tube comprising a first cylindri- 5 cal anode, cylindrical grid, and cathode, and a second cylindrical anode, cylindrical grid, and a cathode, both sets of electrodes being located within a single envelope, said anodes and grids being respectively coupled together capacitively 55 and also respectively mounted coaxially with regard to one another.
  • a vacuum tube comprising a first cylindrical anode, cylindrical grid, and cathode, and a second cylindrical anode, cylindrical grid, and a cathode, both sets of electrodes being located within a single envelope, said anodes and grids being respectively physically separated from one another within the tube and mounted coaxially on the same straight line, the ends of the respec-v tive anode and grid electrodes having flat plates for capacitively coupling said electrodes to one another.
  • An electron discharge device comprising a first cylindrical anode and a grid, a second cylindrical anode and a grid, and cathode means for said anodes and grids, all within a. single envelope, said anodes and grids being respectively coupled together capacitively, said anodes being mounted coaxially with respect to each other.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Direct Current Feeding And Distribution (AREA)
  • Amplifiers (AREA)
US678487A 1932-07-08 1933-06-30 Double receiver tube for ultra short waves Expired - Lifetime US2021891A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE400897X 1932-07-08

Publications (1)

Publication Number Publication Date
US2021891A true US2021891A (en) 1935-11-26

Family

ID=6402665

Family Applications (1)

Application Number Title Priority Date Filing Date
US678487A Expired - Lifetime US2021891A (en) 1932-07-08 1933-06-30 Double receiver tube for ultra short waves

Country Status (3)

Country Link
US (1) US2021891A (fr)
FR (1) FR757643A (fr)
GB (1) GB400897A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2522557A (en) * 1943-01-25 1950-09-19 Harold A Zahl Electronic tube
US2749476A (en) * 1951-02-02 1956-06-05 Int Standard Electric Corp Electron discharge devices
US2797266A (en) * 1953-05-13 1957-06-25 Philips Corp Electric discharge tube for highfrequency amplification

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2522557A (en) * 1943-01-25 1950-09-19 Harold A Zahl Electronic tube
US2749476A (en) * 1951-02-02 1956-06-05 Int Standard Electric Corp Electron discharge devices
US2797266A (en) * 1953-05-13 1957-06-25 Philips Corp Electric discharge tube for highfrequency amplification

Also Published As

Publication number Publication date
FR757643A (fr) 1933-12-29
GB400897A (en) 1933-11-02

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