GB677235A - Improvements in or relating to electro-acoustic transducers - Google Patents

Improvements in or relating to electro-acoustic transducers

Info

Publication number
GB677235A
GB677235A GB28856/48A GB2885648A GB677235A GB 677235 A GB677235 A GB 677235A GB 28856/48 A GB28856/48 A GB 28856/48A GB 2885648 A GB2885648 A GB 2885648A GB 677235 A GB677235 A GB 677235A
Authority
GB
United Kingdom
Prior art keywords
disc
base
casing
cheek
spool
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
GB28856/48A
Inventor
James Samuel Paterson Roberton
Roger Chapman
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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
Priority claimed from GB1873946A external-priority patent/GB624566A/en
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB677235A publication Critical patent/GB677235A/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
    • 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
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for telephonic receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H04R11/06—Telephone receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

677,235. Sound-receiving devices. STANDARD TELEPHONES & CABLES, Ltd. Nov. 4, 1949 [Nov. 5, 1948], No. 28856/48. Addition to 624,566 and 677,225. Class 40 (iv). In an electro-acoustic transducer having its magnetic circuit arranged as in Specification 677,225, the auxiliary pole-piece comprises an annular ridge 21 raised from the surface of a disc 19 the outer edge of which cooperates with the magnet 10, and the disc is pierced at the middle by a hole 23 which is covered by a silk disc 24. In the deaf aid receiver shown a nickel-iron base plate 7 is seated on a shelf 6 in a thermoplastic casing 1 and carries both a central polepiece 11 and the magnet 10, on the upper face of which rests the upper cheek 14 of a spool and a mild steel ring 13. A diaphragm rests on the upper spool cheek 14 and the ring 13 supports the disc 19 so that the annular ridge 21 is substantially opposite the face of the main pole. A projection 22 on the other side of the disc is designed to carry a plug for insertion in the ear, and the hole 23 covered by the silk disc 24 provides a sound passage to the diaphragm. Projections 9 from the lower spool cheek carrying leads to the coil 16 pass through apertures 8 in the base 7 of the magnetic assembly and the leads terminate at contacts 5 on the base 2 of the casing. Grooves 4 in the extensions 3 from the bottom of the casing receive a spring to hold a plug so that its contacts co-operate with those on the base.
GB28856/48A 1946-06-21 1948-11-05 Improvements in or relating to electro-acoustic transducers Expired GB677235A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1873946A GB624566A (en) 1948-10-22 1946-06-21 Improvements in or relating to electromagnetic vibratory devices
GB2745348A GB666408A (en) 1948-10-22 1948-10-22 Improvements in or relating to electro-magnetic vibratory devices

Publications (1)

Publication Number Publication Date
GB677235A true GB677235A (en) 1952-08-13

Family

ID=32232449

Family Applications (3)

Application Number Title Priority Date Filing Date
GB11669/46A Expired GB606012A (en) 1946-06-21 1946-04-16 Improvements in or relating to electro magnetic vibratory devices
GB15648/47A Expired GB677225A (en) 1946-06-21 1947-06-13 Improvements in or relating to electro-acoustic transducers
GB28856/48A Expired GB677235A (en) 1946-06-21 1948-11-05 Improvements in or relating to electro-acoustic transducers

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB11669/46A Expired GB606012A (en) 1946-06-21 1946-04-16 Improvements in or relating to electro magnetic vibratory devices
GB15648/47A Expired GB677225A (en) 1946-06-21 1947-06-13 Improvements in or relating to electro-acoustic transducers

Country Status (4)

Country Link
US (1) US2610259A (en)
BE (1) BE476263A (en)
FR (2) FR61602E (en)
GB (3) GB606012A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE500297A (en) * 1951-10-31
US2754373A (en) * 1952-08-22 1956-07-10 Harry B Shaper Miniature hearing-aid receiver
US2869049A (en) * 1954-04-13 1959-01-13 Baso Inc Electromagnetic control device
US2882459A (en) * 1954-06-04 1959-04-14 Berglund Nils Knut Edvard Polarised relay
US2848560A (en) * 1954-09-20 1958-08-19 Beltone Hearing Aid Company Hearing aid receiver
US2830240A (en) * 1954-09-23 1958-04-08 Hoffman Electronics Corp Electromagnetically controlled capacitors or the like
US2957053A (en) * 1956-02-21 1960-10-18 Gen Phones Corp Audio-electric translating device
JPS4937527B1 (en) * 1971-02-23 1974-10-09
CN102355617B (en) * 2011-08-15 2014-04-16 苏州恒听电子有限公司 Moving-iron unit for loudspeaking device
US11197099B2 (en) * 2019-06-12 2021-12-07 AAC Technologies Pte. Ltd. Screen sounding device
CN111050252A (en) * 2019-12-02 2020-04-21 歌尔股份有限公司 Vibration sounding device for electronic product and electronic product

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US679405A (en) * 1901-03-22 1901-07-30 Emil Volkers Microtelephone.
US1660864A (en) * 1923-01-05 1928-02-28 Westinghouse Electric & Mfg Co Telephone device
US1721217A (en) * 1926-05-20 1929-07-16 Rca Corp Telephone receiver
US1830160A (en) * 1928-03-19 1931-11-03 French Electric Company Telephone receiver
US2069817A (en) * 1933-09-26 1937-02-09 Bell Telephone Labor Inc Acoustic device
US2099727A (en) * 1934-04-05 1937-11-23 Archibald A Duncan Telephone receiver
BE439377A (en) * 1939-05-19
BE479953A (en) * 1940-11-29
US2396135A (en) * 1942-05-06 1946-03-05 Terry Robert Saint George Electromagnetic device

Also Published As

Publication number Publication date
US2610259A (en) 1952-09-09
FR951325A (en) 1949-10-29
FR61602E (en) 1955-05-16
BE476263A (en)
GB677225A (en) 1952-08-13
GB606012A (en) 1948-08-04

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