GB331828A - Improvements in or relating to sound reproducers or transmitters - Google Patents

Improvements in or relating to sound reproducers or transmitters

Info

Publication number
GB331828A
GB331828A GB1077829A GB1077829A GB331828A GB 331828 A GB331828 A GB 331828A GB 1077829 A GB1077829 A GB 1077829A GB 1077829 A GB1077829 A GB 1077829A GB 331828 A GB331828 A GB 331828A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
tube
coil
rubber
tubes
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
GB1077829A
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.)
ERIC MORTON MATTHEW
Original Assignee
ERIC MORTON MATTHEW
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 ERIC MORTON MATTHEW filed Critical ERIC MORTON MATTHEW
Publication of GB331828A publication Critical patent/GB331828A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • 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
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/041—Centering
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/207—Shape aspects of the outer suspension of loudspeaker diaphragms

Abstract

331,828. Matthew, E. M. April 8, 1929. Diaphragms - loud-speakers; magnetic instruments.-The diaphragm of a sound reproducer or transmitter is centred by pneumatic rubber tube9 co-operating with curved working surfaces to prevent creep of diaphragm or tube relative to each other or to the housing. The Figure shows a moving-coil loud-spea.ker in which the moulded diaphragm is suspended at its cylindrical periphery C by a rubber tube <yz> engaging with the radiused surfaces X of the moulded ring T. The coil former H is recessed at J to receive the winding, which may be of magnetic wire, or ribbon wound edgewise, and is divided into sections by square section rubber bands, connections to the coil being anchored to pips M on the diaphragm. The coil former is centred both radially and axially by a rubber tube Y, working between the surface P of the cradle and a radiused portion K of the former. Further tubes may be provided such as at Y<3> or between the coil former and magnet pole R<2>. The apex of the diaphragm is retained in order to prevent passage, of air between opposite sides, or a disc may be affixed at F. By varying the curvature of the surfaces X, K and adjusting the inflation of the tubes the degree of restraint on the diaphragm may be adjusted. A shallow annulus W is provided to receive a further rubber tube to serve as an air seal between the ring T and a baffle. The drawings of the Provisional Specification illustrate various centring arrangements. Figs. 1, 2 and 3 (not shown) show a single tube co-operating with the free edge of a conical diaphragm; in Fig. 4 (not shown) the tube is gripped between a circular recess in the cone edge and a similar recess in the baffle; Fig. 5 (not shown) shows a diaphragm edge held in a double tube, while Figs. 5, 6 and 8 (not shown) give three arrangements employing two tubes, one on each side the diaphragm edge. Figs. 9, 10 and 11 (not shown) give centring arrangements for the former of a moving-coil instrument, the applications of the rubber tubes being generally similar to those for the diaphragm edge. Specification 27945/10 is referred to.
GB1077829A 1929-07-01 1929-04-08 Improvements in or relating to sound reproducers or transmitters Expired GB331828A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1326830A GB337836A (en) 1929-07-01 1929-07-01 Improvements in or relating to sound reproducers or transmitters

Publications (1)

Publication Number Publication Date
GB331828A true GB331828A (en) 1930-07-08

Family

ID=10019877

Family Applications (3)

Application Number Title Priority Date Filing Date
GB1077829A Expired GB331828A (en) 1929-07-01 1929-04-08 Improvements in or relating to sound reproducers or transmitters
GB1326830A Expired GB337836A (en) 1929-07-01 1929-07-01 Improvements in or relating to sound reproducers or transmitters
GB1788530A Expired GB348425A (en) 1929-07-01 1930-04-23 Improvements in or relating to sound reproducers or transmitters

Family Applications After (2)

Application Number Title Priority Date Filing Date
GB1326830A Expired GB337836A (en) 1929-07-01 1929-07-01 Improvements in or relating to sound reproducers or transmitters
GB1788530A Expired GB348425A (en) 1929-07-01 1930-04-23 Improvements in or relating to sound reproducers or transmitters

Country Status (1)

Country Link
GB (3) GB331828A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2846598A (en) * 1956-01-13 1958-08-05 Calidyne Company Inc Vibration generator
US4235302A (en) * 1977-03-15 1980-11-25 Kenkichi Tsukamoto Loudspeaker
US4239090A (en) * 1979-03-29 1980-12-16 Dahlquist Jon G High accuracy bass reproducer device
GB2384938A (en) * 2002-01-31 2003-08-06 1 Ltd Loudspeaker diaphragm suspension arrangement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4532383A (en) * 1980-01-04 1985-07-30 Willy Erazm A Electroacoustic transducer having a variable thickness diaphragm

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2846598A (en) * 1956-01-13 1958-08-05 Calidyne Company Inc Vibration generator
US4235302A (en) * 1977-03-15 1980-11-25 Kenkichi Tsukamoto Loudspeaker
US4239090A (en) * 1979-03-29 1980-12-16 Dahlquist Jon G High accuracy bass reproducer device
GB2384938A (en) * 2002-01-31 2003-08-06 1 Ltd Loudspeaker diaphragm suspension arrangement
GB2384938B (en) * 2002-01-31 2005-07-20 1 Ltd Suspension system for electro-acoustic transducer

Also Published As

Publication number Publication date
GB337836A (en) 1930-11-03
GB348425A (en) 1931-05-14

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