GB429454A - Method of modulating short and ultra-short waves for wireless signalling and the like - Google Patents

Method of modulating short and ultra-short waves for wireless signalling and the like

Info

Publication number
GB429454A
GB429454A GB23360/34A GB2336034A GB429454A GB 429454 A GB429454 A GB 429454A GB 23360/34 A GB23360/34 A GB 23360/34A GB 2336034 A GB2336034 A GB 2336034A GB 429454 A GB429454 A GB 429454A
Authority
GB
United Kingdom
Prior art keywords
short
waves
ultra
aug
varied
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
Application number
GB23360/34A
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.)
OSKAR PFETSCHER
Original Assignee
OSKAR PFETSCHER
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 OSKAR PFETSCHER filed Critical OSKAR PFETSCHER
Publication of GB429454A publication Critical patent/GB429454A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C7/00—Modulating electromagnetic waves
    • H03C7/02—Modulating electromagnetic waves in transmission lines, waveguides, cavity resonators or radiation fields of antennas

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Color Printing (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

429,454. Microphones. ESAU, A., 15, Wilhelm Stadestrasse, and PFETSCHER, 0., 5A, Burgweg, both in Jena, Germany. Aug. 13, 1934, No. 23360. Convention date, Aug. 11, 1933. [Class 40 (iv)] [See also Group XL] Short radio waves are modulated by a microphone forming a leakage path across a high - frequency circuit such as a pair of Lecher wires. In Fig. 1, the Lecher wires 1, 2 have carbon rods 3, 4 inserted at a voltage anti-node which are bridged by a carbon lead 5 laid on them, the contact pressure being varied by impinging sound waves. Granules may be provided at the contact points. In Fig. 2, a transverse metal band 6 is slightly spaced from the Lecher wires 1, 2 the shunt capacity thus formed being varied by sound waves.
GB23360/34A 1933-08-11 1934-08-13 Method of modulating short and ultra-short waves for wireless signalling and the like Expired GB429454A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE429454X 1933-08-11

Publications (1)

Publication Number Publication Date
GB429454A true GB429454A (en) 1935-05-30

Family

ID=6477610

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23360/34A Expired GB429454A (en) 1933-08-11 1934-08-13 Method of modulating short and ultra-short waves for wireless signalling and the like

Country Status (3)

Country Link
BE (1) BE404628A (en)
FR (1) FR777100A (en)
GB (1) GB429454A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE932621C (en) * 1936-10-11 1955-09-05 Max Baermann Magnetic holding device with a permanent magnet and soft iron pole pieces

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE932621C (en) * 1936-10-11 1955-09-05 Max Baermann Magnetic holding device with a permanent magnet and soft iron pole pieces

Also Published As

Publication number Publication date
FR777100A (en) 1935-02-11
BE404628A (en)

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