GB357230A - Improvements in or relating to loudspeakers - Google Patents

Improvements in or relating to loudspeakers

Info

Publication number
GB357230A
GB357230A GB18702/30A GB1870230A GB357230A GB 357230 A GB357230 A GB 357230A GB 18702/30 A GB18702/30 A GB 18702/30A GB 1870230 A GB1870230 A GB 1870230A GB 357230 A GB357230 A GB 357230A
Authority
GB
United Kingdom
Prior art keywords
loudspeakers
relating
hardisty
aldwych
slackening
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
GB18702/30A
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.)
RUPERT WOODVILLE HARDISTY
STC PLC
Original Assignee
RUPERT WOODVILLE HARDISTY
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
Application filed by RUPERT WOODVILLE HARDISTY, Standard Telephone and Cables PLC filed Critical RUPERT WOODVILLE HARDISTY
Priority to GB18702/30A priority Critical patent/GB357230A/en
Priority to US527656A priority patent/US1905702A/en
Publication of GB357230A publication Critical patent/GB357230A/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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Abstract

357,230. Wrench handles. STANDARD TELEPHONES & CABLES, Ltd. and HARDISTY, R. W., Columbia House, Aldwych, London. June 19, 1930, No. 18702. [Class 61 (iii).] The spanner 13 shown in the Figure is employed for tightening and slackening bolts which secure and position the frame assembly containing the diaphragm and coil of a moving coil loudspeaker on the magnet system.
GB18702/30A 1930-06-19 1930-06-19 Improvements in or relating to loudspeakers Expired GB357230A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB18702/30A GB357230A (en) 1930-06-19 1930-06-19 Improvements in or relating to loudspeakers
US527656A US1905702A (en) 1930-06-19 1931-04-04 Loudspeaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB18702/30A GB357230A (en) 1930-06-19 1930-06-19 Improvements in or relating to loudspeakers

Publications (1)

Publication Number Publication Date
GB357230A true GB357230A (en) 1931-09-21

Family

ID=10116940

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18702/30A Expired GB357230A (en) 1930-06-19 1930-06-19 Improvements in or relating to loudspeakers

Country Status (2)

Country Link
US (1) US1905702A (en)
GB (1) GB357230A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2524836A (en) * 1947-04-02 1950-10-10 Rola Company Inc Permanent magnet electrodynamic loud-speaker
US2666980A (en) * 1947-04-02 1954-01-26 Rola Company Inc Method of making loud-speakers
GB673939A (en) * 1947-08-27 1952-06-18 Magnavox Australia Pty Ltd Improvements in loud speakers
GB686743A (en) * 1947-08-27 1953-01-28 Magnavox Australia Pty Ltd Improvements in loud speakers
US2604551A (en) * 1947-10-02 1952-07-22 Magnavox Australia Pty Ltd Magnetic unit with magnetically positioned pole piece for loudspeakers
US3133162A (en) * 1961-09-06 1964-05-12 Aldo L Coen Loud speaker structure
US3240882A (en) * 1962-01-31 1966-03-15 Gen Electric Permanent magnet type loudspeakers
USD346878S (en) * 1991-03-25 1994-05-10 Philip Morris Incorporated Electrical cigarette
USD741841S1 (en) * 2014-06-05 2015-10-27 Jacob Aaron Fuller Audio speaker frame
USD884683S1 (en) * 2019-01-02 2020-05-19 Alpine Electronics, Inc. Speaker driver frame

Also Published As

Publication number Publication date
US1905702A (en) 1933-04-25

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