GB191008332A - Improvements in Telephone System and Individual Transmitter. - Google Patents

Improvements in Telephone System and Individual Transmitter.

Info

Publication number
GB191008332A
GB191008332A GB191008332DA GB191008332A GB 191008332 A GB191008332 A GB 191008332A GB 191008332D A GB191008332D A GB 191008332DA GB 191008332 A GB191008332 A GB 191008332A
Authority
GB
United Kingdom
Prior art keywords
insulating
telephone system
attached
block
parts
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
Inventor
Charles Logan Chisholm
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
Application granted granted Critical
Publication of GB191008332A publication Critical patent/GB191008332A/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
    • H04R1/12—Sanitary or hygienic devices for mouthpieces or earpieces, e.g. for protecting against infection

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)

Abstract

8332. Chisholm, C. L. April 6. Plug couplings. - An insulating-block 12, Fig. 7, attached to the casing 1 of a portable telephone transmitter is formed with recesses 13 containing pins 15 adapted to engage the coupling-members shown in Fig. 6. The insulating- block 29 has split tubular projections 23, 24 containing split metal sleeves extending nearly to the end. The leads are attached to metal plugs 33. When the parts are coupled, a spring-pressed pin 35 opens a contact between the parts 34, 38.
GB191008332D 1910-04-06 1910-04-06 Improvements in Telephone System and Individual Transmitter. Expired GB191008332A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191008332T 1910-04-06

Publications (1)

Publication Number Publication Date
GB191008332A true GB191008332A (en) 1910-09-29

Family

ID=32491876

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191008332D Expired GB191008332A (en) 1910-04-06 1910-04-06 Improvements in Telephone System and Individual Transmitter.

Country Status (3)

Country Link
DE (1) DE234973C (en)
FR (1) FR416956A (en)
GB (1) GB191008332A (en)

Also Published As

Publication number Publication date
DE234973C (en)
FR416956A (en) 1910-11-03

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