FR791976A - Perfectionnements aux téléphones de navires - Google Patents

Perfectionnements aux téléphones de navires

Info

Publication number
FR791976A
FR791976A FR791976DA FR791976A FR 791976 A FR791976 A FR 791976A FR 791976D A FR791976D A FR 791976DA FR 791976 A FR791976 A FR 791976A
Authority
FR
France
Prior art keywords
telephones
ship
ship telephones
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
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.)
GLEN S PATENTS AND HOLDINGS LT
Original Assignee
GLEN S PATENTS AND HOLDINGS LT
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 GLEN S PATENTS AND HOLDINGS LT filed Critical GLEN S PATENTS AND HOLDINGS LT
Application granted granted Critical
Publication of FR791976A publication Critical patent/FR791976A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R27/00—Public address systems

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
FR791976D 1934-09-22 1935-07-02 Perfectionnements aux téléphones de navires Expired FR791976A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB27278/34A GB444590A (en) 1934-09-22 1934-09-22 Improvements in or relating to ships' telephones

Publications (1)

Publication Number Publication Date
FR791976A true FR791976A (fr) 1935-12-20

Family

ID=10256967

Family Applications (1)

Application Number Title Priority Date Filing Date
FR791976D Expired FR791976A (fr) 1934-09-22 1935-07-02 Perfectionnements aux téléphones de navires

Country Status (3)

Country Link
US (1) US2074172A (fr)
FR (1) FR791976A (fr)
GB (1) GB444590A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2516845A (en) * 1945-10-05 1950-08-01 Int Standard Electric Corp Telephone call-box system
US2673894A (en) * 1945-12-11 1954-03-30 Jr Robert L Wallace Interlocking switch for intercommunication systems
US2655566A (en) * 1949-05-03 1953-10-13 Abraham L Pittinger Explosion-proof acoustic device

Also Published As

Publication number Publication date
US2074172A (en) 1937-03-16
GB444590A (en) 1936-03-23

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