US2234007A - Acoustical apparatus - Google Patents

Acoustical apparatus Download PDF

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Publication number
US2234007A
US2234007A US145168A US14516837A US2234007A US 2234007 A US2234007 A US 2234007A US 145168 A US145168 A US 145168A US 14516837 A US14516837 A US 14516837A US 2234007 A US2234007 A US 2234007A
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US
United States
Prior art keywords
diaphragm
hollow
cemented
acoustical
peripheral portion
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 - Lifetime
Application number
US145168A
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English (en)
Inventor
Harry F Olson
Preston John
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.)
RCA Corp
Original Assignee
RCA Corp
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 to BE428291D priority Critical patent/BE428291A/xx
Application filed by RCA Corp filed Critical RCA Corp
Priority to US145168A priority patent/US2234007A/en
Priority to US145467A priority patent/US2234833A/en
Application granted granted Critical
Publication of US2234007A publication Critical patent/US2234007A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • This invention relates to acoustical apparatus and more particularly to an acoustical diaphragm.
  • the primary object of our invention is to provide an improved acoustical diaphragm which will be free from the aforementioned defect.
  • Another object of our invention is to provide an improved acoustical diaphragm which will act more nearly like a true piston than diaphragms heretofore known.
  • a further object of our invention is to provide an improved acoustical diaphragm as aforesaid which is inexpensive of manufacture and highly efcient in use.
  • the diaphragm we turn back on itself the outside edge of the diaphragm and apply a ring to the turned back edge so as to provide a relatively stiff, hollow peripheral portion for the diaphragm.
  • the portion which is turned back may be of triangular, semi-circular, or any other desired shape, and the hollow interior may be filled with a light weight material of great strength, such as balsa wood.
  • the usual flexible suspens-ion member is preferably cemented to the stiff annular portion and may be employed to mount the diaphragm upon a suitable support.
  • the peripheral portion of the diaphragm may be turned back on itself and cemented to a hollow aluminum tube which extends around the periphery of the diaphragm.
  • Figures 2 to 6, inclusive, show other modifica- 10 tions thereof.
  • a diaphragm I made of flexible material, 15 such as paper, sized linen, a suitable synthetic resin, thin sheet metal, or the like, and of substantially frusto-conical form.
  • the marginal portion 3 of the diaphragm I is bent away from the body portion thereof by being partly turned 20 back on the body portion in an outward direction to provide an inverted V.
  • An annular strip 5 of suitable material (for example, of the same material as the diaphragm I) is cemented to the V-shaped, reversely bent portion in such rela- 25 tion thereto as to enclose a hollow peripheral portion which is substantially triangular in crosssection.
  • This triangular shaped section provides a very rigid peripheral portion for the flexible body portion of the diaphragm I and prevents 30 breaking up of the diaphragm.
  • a resilient annular suspension ring l of rubber or the like, is cemented to the annular strip or member 5, the ring 'l extending radially outwardly from the bent-back marginal portion 3 on a radius greater 5 than that of the marginal portion 3, as clearly shown in Fig. 1, and providing means whereby the diaphragm may be mounted on a suitable baffleor the like 9, as by a plurality of bolts I I.
  • the marginal, reversely bent portion of the diaphragm I is made substantially semicircular in cross-section and the annular member 5 is cemented to the interior thereof, still, however, providing a stiff, hollow peripheral portion for the diaphragm I.
  • the suspension member l is cemented to the annular member 5 and extends radially outwardly on a radius greater than that of the marginal portion 3.
  • the portion 3 is completely reversely bent and cemented to the body of thel diaphragm I, thus eliminating the use of the annular strip 5.
  • the marginal portion 3 in this case may have any suitable shape in cross-section, that illustrated 55 being somewhat of the teardrop design. Instead of cementing the suspension member 'I to the lower part of the hollow peripheral portion 3, it may be cemented to the upper part thereof, as shown in this figure.
  • the marginal portion 3 is similar to that shown in Fig. 2, but the annular member 5 is also made substantially semi-circular in cross-section, the member 'I being cemented to the diaphragm I between the marginal portion 3 and the annular member 5 and again extending radially outwardly on a radius greater than that of the marginal portion 3.
  • Fig. 6 The modication of our invention shown in Fig. 6 is similar to that shown in Fig. 1, but has a ller of some strong but light material I5 therein.
  • materials which are suitable as llers are balsa wood, pith, etc.
  • the lightness of the material does not add substantially to the mass of the diaphragm, while its great strength and rigidity help to stiien the normally hollow peripheral portion of the diaphragm I.
  • An acoustical diaphragm comprising a frusto-conical member of relatively iiexible material having a body portion and a marginal portion, said marginal portion being partly turned back on said body portion outwardly thereof, an annular member secured to said frustoconical member adjacent to said body portion and to said turned-back marginal portion to cooperate therewith to enclose a hollow space and thereby provide a relatively stiff peripheral portion for the diaphragm, and flexible suspension means connected to said annular member, said suspension means extending radially outwardly from said marginal portion on a radius greater than that of said turned-back marginal portion.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
US145168A 1937-05-28 1937-05-28 Acoustical apparatus Expired - Lifetime US2234007A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE428291D BE428291A (en)) 1937-05-28
US145168A US2234007A (en) 1937-05-28 1937-05-28 Acoustical apparatus
US145467A US2234833A (en) 1937-05-28 1937-05-29 Acoustical apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US145168A US2234007A (en) 1937-05-28 1937-05-28 Acoustical apparatus

Publications (1)

Publication Number Publication Date
US2234007A true US2234007A (en) 1941-03-04

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ID=22511894

Family Applications (1)

Application Number Title Priority Date Filing Date
US145168A Expired - Lifetime US2234007A (en) 1937-05-28 1937-05-28 Acoustical apparatus

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US (1) US2234007A (en))
BE (1) BE428291A (en))

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2549139A (en) * 1947-06-17 1951-04-17 Stevens Products Inc Cone diaphragm for loud-speakers
DE1094304B (de) * 1956-01-11 1960-12-08 Peter Grassmann Elektrodynamischer Lautsprecher mit Konusmembran
US5748759A (en) * 1995-04-05 1998-05-05 Carver Corporation Loud speaker structure
US6490363B1 (en) * 1999-10-13 2002-12-03 Chun-I Liu Structure of speaker
US6728389B1 (en) * 2001-05-24 2004-04-27 Paul F. Bruney Membrane support system
US20040188174A1 (en) * 1998-11-30 2004-09-30 Sahyoun Joseph Yaacoub Audio speaker with wobble free voice coil movement
US20050013461A1 (en) * 2003-06-04 2005-01-20 Gilles Milot Loudspeaker
US7185735B2 (en) * 1998-11-30 2007-03-06 Joseph Yaacoub Sahyoun Audio speaker with wobble free voice coil movement
US20070125591A1 (en) * 1998-11-30 2007-06-07 Sahyoun Joseph Y Audio speaker with wobble free voice coil movement
US20100303278A1 (en) * 2008-08-08 2010-12-02 Sahyoun Joseph Y Low profile audio speaker with minimization of voice coil wobble, protection and cooling
US20130306397A1 (en) * 2010-12-23 2013-11-21 Jason D. Silver Acoustic Diaphragm Suspending
US20140140543A1 (en) * 2012-11-16 2014-05-22 Aac Microtech (Changzhou) Co., Ltd. Micro-electroacoustic Device

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2549139A (en) * 1947-06-17 1951-04-17 Stevens Products Inc Cone diaphragm for loud-speakers
DE1094304B (de) * 1956-01-11 1960-12-08 Peter Grassmann Elektrodynamischer Lautsprecher mit Konusmembran
US5748759A (en) * 1995-04-05 1998-05-05 Carver Corporation Loud speaker structure
US20070125591A1 (en) * 1998-11-30 2007-06-07 Sahyoun Joseph Y Audio speaker with wobble free voice coil movement
US20040188174A1 (en) * 1998-11-30 2004-09-30 Sahyoun Joseph Yaacoub Audio speaker with wobble free voice coil movement
US7360626B2 (en) * 1998-11-30 2008-04-22 Joseph Yaacoub Sahyoun Audio speaker with wobble free voice coil movement
US7185735B2 (en) * 1998-11-30 2007-03-06 Joseph Yaacoub Sahyoun Audio speaker with wobble free voice coil movement
US7225895B2 (en) * 1998-11-30 2007-06-05 Joseph Yaacoub Sahyoun Audio speaker with wobble free voice coil movement
US6490363B1 (en) * 1999-10-13 2002-12-03 Chun-I Liu Structure of speaker
US6728389B1 (en) * 2001-05-24 2004-04-27 Paul F. Bruney Membrane support system
US20050013461A1 (en) * 2003-06-04 2005-01-20 Gilles Milot Loudspeaker
US7418107B2 (en) * 2003-06-04 2008-08-26 Harman Becker Automotive Systems Gmbh Loudspeaker
US20100303278A1 (en) * 2008-08-08 2010-12-02 Sahyoun Joseph Y Low profile audio speaker with minimization of voice coil wobble, protection and cooling
US8204269B2 (en) 2008-08-08 2012-06-19 Sahyoun Joseph Y Low profile audio speaker with minimization of voice coil wobble, protection and cooling
US20130306397A1 (en) * 2010-12-23 2013-11-21 Jason D. Silver Acoustic Diaphragm Suspending
US8991548B2 (en) * 2010-12-23 2015-03-31 Bose Corporation Acoustic diaphragm suspending
US20140140543A1 (en) * 2012-11-16 2014-05-22 Aac Microtech (Changzhou) Co., Ltd. Micro-electroacoustic Device
US9210511B2 (en) * 2012-11-16 2015-12-08 Aac Acoustic Technologies (Shenzhen) Co., Ltd. Micro-electroacoustic device

Also Published As

Publication number Publication date
BE428291A (en))

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