US1778308A - Acoustic device - Google Patents

Acoustic device Download PDF

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Publication number
US1778308A
US1778308A US690803A US69080324A US1778308A US 1778308 A US1778308 A US 1778308A US 690803 A US690803 A US 690803A US 69080324 A US69080324 A US 69080324A US 1778308 A US1778308 A US 1778308A
Authority
US
United States
Prior art keywords
conical
diaphragm
support
frusto
edge
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
US690803A
Other languages
English (en)
Inventor
George W Burchett
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Application granted granted Critical
Publication of US1778308A publication Critical patent/US1778308A/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; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones

Definitions

  • this invention comprises a frusto-conical section attached to the base of the conical diaphragm and rigidly supported at its smaller diameter.
  • Fig. 1 is a rear View of a loud s eaking receiver employing this invenig. 2 is a side elevation of the device shown in Fig. 1; andFig. 3 is a detailed section of the diaphragm and frusto-conical support.
  • the diaphragm 5 is conical in shape and as made of some light elastic material such as paper. Attached to its base is a frusto-conical supporting member 6 preferably made of the same material as the diaphragm 5.
  • The'irusto-conical .member 6 serves as a support for the member 5 and cooperates with it in reproducing the sound vibrations.
  • the conical and frusto-conical sections are fastened together at their outer edges, preferably by means of an aluminum ring 7 of tl-shaped cross section clamped around the two sections as is shown in detailin Fig. 3.
  • This ring not only serves as a simple and efficient ineans of clamping the two sections together and stiffening their edges but also provides mechanical protection for the diaphragm.
  • Another ring of metal 8 is clamped around the edge of the'frusto-conical section at its smaller diameter. this section and to provide means of mountmg.
  • lihe diaphragm is supported by a stand 9 on which is mounted a cast metal ring 10.
  • the frusto-conical section is securely attached to this supporting ring by means of bolts 11.
  • the metal ring 8 is kept out of contact with the supporting ring 10 throughout the major part of its circumference and in the form of this inventiQn shown, this is accomplished
  • This serves to stifi'en llolylmeans of bosses 15 provided at each bolt- Attached to the supporting ring 10 is a bracket 12 on which is mounted an actuating device 13 which transmits vibrations to the diaphragm through a rod 14 attached to the diaphragm at its apex.
  • This actuating device may be any of the well-known electromagnetic types but is preferably of the type described in U. S. Patent No. 1,365,898 granted to H. .C. Edgerton January 18, 1921.
  • An acoustic device comprising a conical diaphragm, driving means attached to the apex thereof, a frusto-conical support having one edge attached to said diaphragm and means for rigidly supporting said frusto conical support at its outer edge.
  • An acoustic device comprising a conical diaphragm, a frusto-conical support having its base attached to thebase of said diaphragm and a rigid ring securely fastened to the frusto-conical support at its smaller end.
  • An acoustic device comprising a conical diaphragm, a frusto-conical support having its outer edge attached to the'base of said diaphragm, a metal ring clamped around the inner edge of said frusto-conical support and a rigid rin firmly attached to said frusto-conical support at its inner edge.
  • An acoustic device comprising'a conical diaphragm, a frusto-conical support for said diaphragm, means for clamping together the bases of said conical diaphragm and said frusto-conical support and means for rigidly supporting said frusto-conical support.
  • An acoustic device comprising a conical diaphragm, a frusto-conical support for said diaphragm, a metal ring clamping together the edges of the bases of said diaphragm and said frusto-conical support and a base rigidly attached to the smaller end of said frustoconical support.
  • An acoustic device comprising a conical diaphragm,a frusto-conical section made of material of substantially the same mechanical properties as said diaphragm, means for fastening together the bases of said conical diaphragm and said frusto-conical section, a metal ring clamped around the edgeof said frusto-conical section at its smaller end, an annular support for said diaphragm rigidly attached to said metal ring and means for preventing the edge of said .frusto-conical section from chattering.
  • An acoustic device comprising a conical diaphragm, a frusto-conical support attached to said diaphragm at its base, a metal ring clamp'ed to the edge of the smaller end of. said frusto-conical support, an annular support firmly attached to the smaller end. of Said frusto-conical support at a plurality of points and means for preventing said metal ring from coming in contact with said annu-' lar support at points other than said points of attachment.
  • An acoustic device comprising a conical diaphragm, a frusto-conical support for said diaphragm, a metal ringclamping together the edges of the bases of said conical diaphra m and said frusto-conical support, a metal ring clamped to the edge of the smaller end of said frusto-conical support, an annular support firmly attached to the smaller end of said irusto-conical support at a plurality of points and bosses on said annular support for preventing said metal ring from coming-in contact with said annular'support at points other than said points of attachment.
  • An acoustic device comprising a conical diaphragm of fibrous material, a section of fibrous material for supporting said diaphragm and a metal band clamped on the edge of said diaphragm at the point. of attachment to said supporting section.
  • An acoustic devic comprising a conical diaphragm, a. frusto-conical support for said diaphragm, and a U shaped ring of aluminum clamping together the edges of the bases of. said conical diaphragm and said frustoconical support.
  • An acoustic device comprising a conical diaphragm, a frusto-conical support having its base attached to the base of said conical diaphragm, a rigid ring securly fastened to said frusto-conical support at its smaller end, an actuating device having a vibrating member attached to said conical diaphragm at its apex and a supporting member attached to said rigid ring for supporting said actuating device.
  • An acoustic device comprising a conical diaphragm, a frusto-conical section having one edge attached to saidconical diaphragm, means for reinforcing the other edge of said frusto-conical section, and means for rigidly mounting said reinforced edge.
  • An acoustic device comprising a conical section, driving means connected to the apex thereof, a frustum shaped section arranged to have its base attached to the base of said conical section, means for connecting said sections at their bases, and a rigidmemher to which the smaller end'of the frustumshaped section is attached, said member having an opening therein through which air may pass.
  • An acoustic device comprising a conical diaphragm, a frustum shaped support for said diaphragm, means for securing together ical diaphragm, a fusto-conical section of material of mechanical properties similar to those of said diaphragm, means for fastening together the bases of said conical dia-- phragmand said frusto-conic'al section, means for rigidly supporting the other edge of said frusto-conicai section, and means for reinforcing said last mentioned edge of said frusto conical section to from chattering.
  • An acoustic device comprising a diaphragm, an. apertured support having its edge attached to said diaphragm so as to form with said diaphragm a hollow body, means'for rigidly mounting said support at its aperture, and means connected to said diaphragm for imparting vibrational forces to said diaphragm to move it toward and away from said rigid mounting, said means being positioned Within said hollow body.
  • Anacoustic device in which said apertured support is composed of material of substantially the same mechanical properties as said diaphragm.
  • a rigid ring support In a sound reproducer, a rigid ring support, a coneshaped diaphragm of greater edge diameter than said support, continuous, flexible sheet material uniting the edge of said diaphragm to said support, and means for applying vibrations representing sound to said diaphragm.
  • A. sound producer comprising light flexible material formed into a first and a second surface of revolutiomsaid second surface of revolution having its edge united to the edge of said first surface of revolution, a rigid support member secured to the other edge'of said second surface, and actuating means operatively connected to a point in said firstsurfaoe.
  • a dish-shaped diaphragm In an acoustic device, a dish-shaped diaphragm, a dish-shaped support having an opening therein, a rigid member having a prevent said edge masses configuration substantially the same as the openmg in said dish-shaped member formounting said dish-shaped member thereon,

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Electromagnetism (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
US690803A 1923-11-30 1924-02-05 Acoustic device Expired - Lifetime US1778308A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5577/25A GB231798A (en) 1923-11-30 1923-11-30 Improvements in acoustic devices

Publications (1)

Publication Number Publication Date
US1778308A true US1778308A (en) 1930-10-14

Family

ID=9798721

Family Applications (2)

Application Number Title Priority Date Filing Date
US690803A Expired - Lifetime US1778308A (en) 1923-11-30 1924-02-05 Acoustic device
US690695A Expired - Lifetime US1926888A (en) 1923-11-30 1924-02-05 Acoustic device

Family Applications After (1)

Application Number Title Priority Date Filing Date
US690695A Expired - Lifetime US1926888A (en) 1923-11-30 1924-02-05 Acoustic device

Country Status (6)

Country Link
US (2) US1778308A (fr)
CH (1) CH109921A (fr)
DE (2) DE533263C (fr)
FR (3) FR577680A (fr)
GB (2) GB231798A (fr)
NL (1) NL25188C (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE969535C (de) * 1942-04-14 1958-06-12 Siemens Ag Schwingsystem mit aus Polyvinylchloridfolie bestehender Membran
US2826259A (en) * 1952-08-04 1958-03-11 Arthur W Page Concussion protection for loudspeakers
GB2359440A (en) * 2000-02-17 2001-08-22 Goodmans Loudspeakers Ltd Stiffening flange for a conical loudspeaker diaphragm

Also Published As

Publication number Publication date
DE517737C (de) 1931-02-09
FR577680A (fr) 1924-08-09
GB231798A (en) 1925-03-30
FR29525E (fr) 1925-08-22
CH109921A (de) 1925-05-01
FR29528E (fr) 1925-08-22
GB240596A (en) 1925-10-08
US1926888A (en) 1933-09-12
NL25188C (fr) 1931-10-15
DE533263C (de) 1931-09-10

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