GB215850A - Improvements in telephone receivers - Google Patents

Improvements in telephone receivers

Info

Publication number
GB215850A
GB215850A GB481723A GB481723A GB215850A GB 215850 A GB215850 A GB 215850A GB 481723 A GB481723 A GB 481723A GB 481723 A GB481723 A GB 481723A GB 215850 A GB215850 A GB 215850A
Authority
GB
United Kingdom
Prior art keywords
stampings
screws
holes
stamping
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
GB481723A
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.)
ALEC EUSTACE HEARNE
STERLING TELEPHONE & ELECTRIC CO Ltd
Original Assignee
ALEC EUSTACE HEARNE
STERLING TELEPHONE & ELECTRIC CO Ltd
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 ALEC EUSTACE HEARNE, STERLING TELEPHONE & ELECTRIC CO Ltd filed Critical ALEC EUSTACE HEARNE
Priority to GB481723A priority Critical patent/GB215850A/en
Priority to FR577119D priority patent/FR577119A/en
Priority to US69287224 priority patent/US1614551A/en
Publication of GB215850A publication Critical patent/GB215850A/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)

Abstract

215,850. Sterling Telephone & Electric Co., Ltd., and Hearne, A. E. Feb. 19,1923. Magnetic instruments.-The magnet in a telephone receiver is formed of two similar arcuate stampings 1, each extending over more than a semicircle and 'bent in its length to the extent of its thickness so that one end of each may overlap the end of the other, as shown in Fig. 3. The holes 4 in each stamping register and screws are passed through the holes to secure the stampings together. The screws may be insulated from one another and form the terminals of the windings. Each stamping may have a portion 3 turned up to form a pole-piece or the stampings may be formed with openings to receive laminated pole-pieces.
GB481723A 1923-02-19 1923-02-19 Improvements in telephone receivers Expired GB215850A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB481723A GB215850A (en) 1923-02-19 1923-02-19 Improvements in telephone receivers
FR577119D FR577119A (en) 1923-02-19 1924-02-13 Stamped earphone magnet
US69287224 US1614551A (en) 1923-02-19 1924-02-14 Telephone receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB481723A GB215850A (en) 1923-02-19 1923-02-19 Improvements in telephone receivers

Publications (1)

Publication Number Publication Date
GB215850A true GB215850A (en) 1924-05-19

Family

ID=9784354

Family Applications (1)

Application Number Title Priority Date Filing Date
GB481723A Expired GB215850A (en) 1923-02-19 1923-02-19 Improvements in telephone receivers

Country Status (3)

Country Link
US (1) US1614551A (en)
FR (1) FR577119A (en)
GB (1) GB215850A (en)

Also Published As

Publication number Publication date
FR577119A (en) 1924-09-01
US1614551A (en) 1927-01-18

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