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GB236442A - Improvements in or relating to telephonic receivers - Google Patents

Improvements in or relating to telephonic receivers

Info

Publication number
GB236442A
GB236442A GB2767824A GB2767824A GB236442A GB 236442 A GB236442 A GB 236442A GB 2767824 A GB2767824 A GB 2767824A GB 2767824 A GB2767824 A GB 2767824A GB 236442 A GB236442 A GB 236442A
Authority
GB
United Kingdom
Prior art keywords
screwed
relating
cap
external
receivers
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
GB2767824A
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 GB2767824A priority Critical patent/GB236442A/en
Publication of GB236442A publication Critical patent/GB236442A/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
    • H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
    • H04R13/02—Telephone receivers

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Casings For Electric Apparatus (AREA)

Abstract

236,442. Graham, E. A. Nov. 19, 1924. Magnetic instruments.-Telephone receivers having an adjustable magnet system operated by external means are provided with removable protecting means surrounding the external adjusting means. A protecting cap h, Fig. 2, may be screwed on, or secured by a bayonet joint to the boss g of the receiver, or the cap h, Fig. 4, mav be provided with a central pin or spigot i adapted to engage a hole, d<1>, screwed or otherwise, in the adjusting stem d. Specification 15369/15 is referred to.
GB2767824A 1924-11-19 1924-11-19 Improvements in or relating to telephonic receivers Expired GB236442A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2767824A GB236442A (en) 1924-11-19 1924-11-19 Improvements in or relating to telephonic receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2767824A GB236442A (en) 1924-11-19 1924-11-19 Improvements in or relating to telephonic receivers

Publications (1)

Publication Number Publication Date
GB236442A true GB236442A (en) 1925-07-09

Family

ID=10263495

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2767824A Expired GB236442A (en) 1924-11-19 1924-11-19 Improvements in or relating to telephonic receivers

Country Status (1)

Country Link
GB (1) GB236442A (en)

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