GB191801A - Improvements in or relating to mouth pieces or trumpets for telephonic transmitting and receiving apparatus - Google Patents

Improvements in or relating to mouth pieces or trumpets for telephonic transmitting and receiving apparatus

Info

Publication number
GB191801A
GB191801A GB2720821A GB2720821A GB191801A GB 191801 A GB191801 A GB 191801A GB 2720821 A GB2720821 A GB 2720821A GB 2720821 A GB2720821 A GB 2720821A GB 191801 A GB191801 A GB 191801A
Authority
GB
United Kingdom
Prior art keywords
rubber
trumpet
tube
sound
trumpets
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
GB2720821A
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
Application filed by Individual filed Critical Individual
Publication of GB191801A publication Critical patent/GB191801A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators
    • G10K11/025—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators horns for impedance matching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • H04R1/083—Special constructions of mouthpieces

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Soy Sauces And Products Related Thereto (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

191,801. Graham, E. A. Oct. 13, 1921. Mouthpieces and earpieces and attachments.-A transmitter mouthpiece or a receiver trumpet has a tubular cushion of a sound-insulating, sound - absorbing or non- sonorous material such as rubber, rubber sponge or cork arranged between it and an intake tube or sound exit tube attached to the associated apparatus in order to absorb undesired resonant vibrations. In an example, Fig. 1, a flanged tube a of rubber is arranged 'between the member b and the trumpet or mouthpiece c. In a modification, the trumpet c is mounted inside a flanged rubber tube which is fitted within the member b. The parts may be held together by friction or by cement, &c.
GB2720821A 1925-06-17 1921-10-13 Improvements in or relating to mouth pieces or trumpets for telephonic transmitting and receiving apparatus Expired GB191801A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1572825A GB254092A (en) 1925-06-17 1925-06-17 Improvements in or relating to mouth pieces or trumpets for telephonic transmitting and receiving apparatus

Publications (1)

Publication Number Publication Date
GB191801A true GB191801A (en) 1923-01-15

Family

ID=10064422

Family Applications (2)

Application Number Title Priority Date Filing Date
GB2720821A Expired GB191801A (en) 1925-06-17 1921-10-13 Improvements in or relating to mouth pieces or trumpets for telephonic transmitting and receiving apparatus
GB1572825A Expired GB254092A (en) 1925-06-17 1925-06-17 Improvements in or relating to mouth pieces or trumpets for telephonic transmitting and receiving apparatus

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB1572825A Expired GB254092A (en) 1925-06-17 1925-06-17 Improvements in or relating to mouth pieces or trumpets for telephonic transmitting and receiving apparatus

Country Status (1)

Country Link
GB (2) GB191801A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106024297B (en) * 2016-06-02 2017-11-07 科润电力科技股份有限公司 A kind of mounting structure of dry-type transformer

Also Published As

Publication number Publication date
GB254092A (en) 1926-07-01

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