GB1442595A - Underwater telephone - Google Patents

Underwater telephone

Info

Publication number
GB1442595A
GB1442595A GB3204472A GB3204472A GB1442595A GB 1442595 A GB1442595 A GB 1442595A GB 3204472 A GB3204472 A GB 3204472A GB 3204472 A GB3204472 A GB 3204472A GB 1442595 A GB1442595 A GB 1442595A
Authority
GB
United Kingdom
Prior art keywords
casing
transducer
july
transmitter
underwater
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
GB3204472A
Other languages
English (en)
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.)
Graseby Instruments Ltd
Original Assignee
Graseby Instruments Ltd
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 Graseby Instruments Ltd filed Critical Graseby Instruments Ltd
Priority to GB3204472A priority Critical patent/GB1442595A/en
Priority to FR7325040A priority patent/FR2192421B3/fr
Publication of GB1442595A publication Critical patent/GB1442595A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
GB3204472A 1972-07-07 1972-07-07 Underwater telephone Expired GB1442595A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3204472A GB1442595A (en) 1972-07-07 1972-07-07 Underwater telephone
FR7325040A FR2192421B3 (pl) 1972-07-07 1973-07-09

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3204472A GB1442595A (en) 1972-07-07 1972-07-07 Underwater telephone

Publications (1)

Publication Number Publication Date
GB1442595A true GB1442595A (en) 1976-07-14

Family

ID=10332277

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3204472A Expired GB1442595A (en) 1972-07-07 1972-07-07 Underwater telephone

Country Status (2)

Country Link
FR (1) FR2192421B3 (pl)
GB (1) GB1442595A (pl)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119980A (en) * 1982-05-11 1983-11-23 Madelyn Carrol Freeman A device for use by a diver to give a signal
GB2414584A (en) * 2004-05-24 2005-11-30 Michael Anthony Wright Communication device for snorkellers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119980A (en) * 1982-05-11 1983-11-23 Madelyn Carrol Freeman A device for use by a diver to give a signal
GB2414584A (en) * 2004-05-24 2005-11-30 Michael Anthony Wright Communication device for snorkellers

Also Published As

Publication number Publication date
FR2192421A1 (pl) 1974-02-08
FR2192421B3 (pl) 1976-06-25

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees