GB190316A - Improvements in connection with respirator mouthpieces, and telephone transmitters - Google Patents

Improvements in connection with respirator mouthpieces, and telephone transmitters

Info

Publication number
GB190316A
GB190316A GB2888421A GB2888421A GB190316A GB 190316 A GB190316 A GB 190316A GB 2888421 A GB2888421 A GB 2888421A GB 2888421 A GB2888421 A GB 2888421A GB 190316 A GB190316 A GB 190316A
Authority
GB
United Kingdom
Prior art keywords
connection
mouthpieces
respirator
telephone transmitters
telephone
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
GB2888421A
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
Priority to GB2888421A priority Critical patent/GB190316A/en
Publication of GB190316A publication Critical patent/GB190316A/en
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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • H04R1/083—Special constructions of mouthpieces
    • 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
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1008—Earpieces of the supra-aural or circum-aural type

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

190,316. Kelly, J. Oct. 31, 1921. Respiratory appliances.-Relates to the combination of telephone transmitters with respiratory appliances of the kind used by aviators &c. The head-piece a is provided with a socket c for the telephone transmitter f and a mouth opening g, the intermediate space j communicating with an external chamber i with an inlet-pipe h, to which is attached a connection n from the oxygen &c. supply.
GB2888421A 1921-10-31 1921-10-31 Improvements in connection with respirator mouthpieces, and telephone transmitters Expired GB190316A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2888421A GB190316A (en) 1921-10-31 1921-10-31 Improvements in connection with respirator mouthpieces, and telephone transmitters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2888421A GB190316A (en) 1921-10-31 1921-10-31 Improvements in connection with respirator mouthpieces, and telephone transmitters

Publications (1)

Publication Number Publication Date
GB190316A true GB190316A (en) 1922-12-21

Family

ID=10282719

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2888421A Expired GB190316A (en) 1921-10-31 1921-10-31 Improvements in connection with respirator mouthpieces, and telephone transmitters

Country Status (1)

Country Link
GB (1) GB190316A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2953129A (en) * 1958-04-21 1960-09-20 Sierra Engineering Company Valve and microphone base assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2953129A (en) * 1958-04-21 1960-09-20 Sierra Engineering Company Valve and microphone base assembly

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