GB1191451A - Underwater Telephony Apparatus. - Google Patents

Underwater Telephony Apparatus.

Info

Publication number
GB1191451A
GB1191451A GB255955A GB255955A GB1191451A GB 1191451 A GB1191451 A GB 1191451A GB 255955 A GB255955 A GB 255955A GB 255955 A GB255955 A GB 255955A GB 1191451 A GB1191451 A GB 1191451A
Authority
GB
United Kingdom
Prior art keywords
transmitter
signals
ristau
jan
water
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
GB255955A
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.)
BARAKUDA GES fur WASSERSPORT R
HANS JOACHIM BERGANN
Original Assignee
BARAKUDA GES fur WASSERSPORT R
HANS JOACHIM BERGANN
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 BARAKUDA GES fur WASSERSPORT R, HANS JOACHIM BERGANN filed Critical BARAKUDA GES fur WASSERSPORT R
Publication of GB1191451A publication Critical patent/GB1191451A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B13/00—Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00
    • H04B13/02—Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy

Abstract

1,191,451. Leakage telephony. K. RISTAU, and H. J. BERGANN, [trading as BARAKUDA GES. FUR WASSERSPORT RISTAU & CO.]. 27 Jan., 1955 [27 Jan., 1954; 18 Oct., 1954], No. 2559/55. Heading H4U. In an underwater telephony system, the signals are transmitted through the water and transformers are provided at the transmitter and receiver which are adjustable so as to facilitate matching to suit charges in the ohmic resistance of the water between the electrodes. At the transmitter, the microphase signals are passed through a low-frequency amplifier and the amplified audio-frequency signals are fed to the output transformer via an impulse stage. The latter produces a pulse modulated signal at the transmitter immersed electrodes. The impulse stage consists of an overdriven triode the grid of which is provided with a triangular voltage from thyratron controlled resistancecapacitor circuit.
GB255955A 1954-01-27 1955-01-27 Underwater Telephony Apparatus. Expired GB1191451A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1954B0029409 DE977786C (en) 1954-01-27 1954-01-27 Procedure and equipment for underwater telephony
DE1954B0033041 DE977778C (en) 1954-01-27 1954-10-18 Facility for underwater telephony

Publications (1)

Publication Number Publication Date
GB1191451A true GB1191451A (en) 1970-05-13

Family

ID=582870

Family Applications (1)

Application Number Title Priority Date Filing Date
GB255955A Expired GB1191451A (en) 1954-01-27 1955-01-27 Underwater Telephony Apparatus.

Country Status (2)

Country Link
DE (2) DE977786C (en)
GB (1) GB1191451A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2621073A1 (en) * 1987-09-28 1989-03-31 Alsthom System for electromagnetic transmission of data through rocks, in particular from the bottom of a hole being drilled

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE370030C (en) * 1923-02-26 Signal Ges M B H Method and device for remote communication by means of electrical currents
DE308522C (en) *
DE82509C (en) *
DE284643C (en) *
DE300792C (en) *
DE303202C (en) * 1912-02-12
DE273169C (en) * 1912-02-17
DE334691C (en) * 1918-12-19 1921-03-19 Siemens & Halske Akt Ges Arrangement for drag electrodes for streamline telegraphy
US2061734A (en) * 1934-09-29 1936-11-24 Rca Corp Signaling system
US2379899A (en) * 1940-11-29 1945-07-10 Rca Corp Radio communication system
US2389432A (en) * 1942-06-24 1945-11-20 Rca Corp Communication system by pulses through the earth

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2621073A1 (en) * 1987-09-28 1989-03-31 Alsthom System for electromagnetic transmission of data through rocks, in particular from the bottom of a hole being drilled

Also Published As

Publication number Publication date
DE977778C (en) 1970-03-26
DE977786C (en) 1970-03-26

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed