GB737635A - Improvements in or relating to voice mufflers for telephone transmitters - Google Patents

Improvements in or relating to voice mufflers for telephone transmitters

Info

Publication number
GB737635A
GB737635A GB28710/53A GB2871053A GB737635A GB 737635 A GB737635 A GB 737635A GB 28710/53 A GB28710/53 A GB 28710/53A GB 2871053 A GB2871053 A GB 2871053A GB 737635 A GB737635 A GB 737635A
Authority
GB
United Kingdom
Prior art keywords
sound
voice
mufflers
relating
casing
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
GB28710/53A
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.)
Individual
Original Assignee
Individual
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
Priority to US175102A priority Critical patent/US2670054A/en
Application filed by Individual filed Critical Individual
Priority to GB28710/53A priority patent/GB737635A/en
Priority to DET8589A priority patent/DE1000868B/en
Priority to FR1093466D priority patent/FR1093466A/en
Priority to CH322826D priority patent/CH322826A/en
Publication of GB737635A publication Critical patent/GB737635A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/19—Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Mouthpieces or receivers specially adapted therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Building Environments (AREA)
  • Exhaust Silencers (AREA)

Abstract

737,635. Mouthpiece attachments. TUTTLE, H. C. Oct. 17, 1953, No. 28710/53. Class 40 (4). In a voice muffler for a telephone transmitter, an entrance layer 12 of sound-absorbent fibrous material, covered by a wire mesh 16, has an entrance aperture 14 giving access to an empty chamber 58 from which a sound duct 30 leads to another empty chamber 38 (at the rear of the casing 10) from which an opening 42 gives access to the atmosphere. The remainder of the casing is filled with fibrous sound-absorbent material. The duct 30 is preferably formed by two substantially horizontal wire meshes 46 and 44 with blocks of felt or the like (not shown) between their edges.
GB28710/53A 1950-07-21 1953-10-17 Improvements in or relating to voice mufflers for telephone transmitters Expired GB737635A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US175102A US2670054A (en) 1950-07-21 1950-07-21 Voice muffler
GB28710/53A GB737635A (en) 1953-10-17 1953-10-17 Improvements in or relating to voice mufflers for telephone transmitters
DET8589A DE1000868B (en) 1953-10-17 1953-11-02 Tuning muffler
FR1093466D FR1093466A (en) 1953-10-17 1953-11-02 Improvements in voice attenuators and similar devices
CH322826D CH322826A (en) 1953-10-17 1953-11-13 Voice damper, in particular for attachment to a microphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB28710/53A GB737635A (en) 1953-10-17 1953-10-17 Improvements in or relating to voice mufflers for telephone transmitters

Publications (1)

Publication Number Publication Date
GB737635A true GB737635A (en) 1955-09-28

Family

ID=10279859

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28710/53A Expired GB737635A (en) 1950-07-21 1953-10-17 Improvements in or relating to voice mufflers for telephone transmitters

Country Status (5)

Country Link
US (1) US2670054A (en)
CH (1) CH322826A (en)
DE (1) DE1000868B (en)
FR (1) FR1093466A (en)
GB (1) GB737635A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2798122A (en) * 1953-10-02 1957-07-02 Ungarsohn Harry Voice reporting apparatus and the like
US2846527A (en) * 1954-12-13 1958-08-05 Johnson Hartmann Telephone mouthpiece voice silencer
DE102019213894A1 (en) * 2019-09-11 2021-03-11 mutum GmbH Limiting sound emissions in speech detection arrangements

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2131820A (en) * 1937-02-15 1938-10-04 Louis S Scher Telephone voice silencer
US2245724A (en) * 1940-05-21 1941-06-17 Louis S Scher Voice silencer
US2508581A (en) * 1946-02-18 1950-05-23 Us Office Of Scient Res And De Noise shield for microphones
US2478783A (en) * 1946-06-17 1949-08-09 Louis S Scher Telephone mouthpiece voice silencer with plural silencing chambers
US2566975A (en) * 1947-01-18 1951-09-04 Leo L Beranek Voice silencer

Also Published As

Publication number Publication date
DE1000868B (en) 1957-01-17
US2670054A (en) 1954-02-23
FR1093466A (en) 1955-05-05
CH322826A (en) 1957-06-30

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