[go: up one dir, main page]

US3032138A - Acoustical devices - Google Patents

Acoustical devices Download PDF

Info

Publication number
US3032138A
US3032138A US698468A US69846857A US3032138A US 3032138 A US3032138 A US 3032138A US 698468 A US698468 A US 698468A US 69846857 A US69846857 A US 69846857A US 3032138 A US3032138 A US 3032138A
Authority
US
United States
Prior art keywords
diaphragm
vibratile
flange
shaped
edge 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
US698468A
Other languages
English (en)
Inventor
Jr William W Haerther
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.)
Hawley Products Co
Original Assignee
Hawley Products Co
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 Hawley Products Co filed Critical Hawley Products Co
Priority to US698468A priority Critical patent/US3032138A/en
Priority to GB33916/58A priority patent/GB876426A/en
Priority to FR780047A priority patent/FR1215391A/fr
Application granted granted Critical
Publication of US3032138A publication Critical patent/US3032138A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed
    • 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 in general to acoustical devices and, more particularly, to improved types of sound reproducing diaphragms.
  • diaphragms used in speakers be triangular in shape such as, for example, when it is desired to afford a triangular-shaped speaker for mounting in a corner, or the like.
  • triangular-shaped diaphragms have been heretofore considered in the art as commonly having inherent disadvantages such as, for example, poor excursion; poor sound reproducing or producing characteristics; tending to crack or break out at the corners, or the like. It is a primary object of this invention to enable such disadvantages of triangular-shaped diaphragms to be eliminated.
  • Another object is to enable a novel triangular-shaped diaphragm to be provided which is capable of reproducing both high and low frequency notes, corresponding in intensity, timbre, mellowness and other qualities, with the originally produced sound waves.
  • a further object of this invention is to provide a novel triangular-shaped sound reproducer or producer which will have a substantially even response curve, Where all sounds of the audible range will be produced or reproduced with substantially equal efficiency.
  • Yet another object is to enable a novel triangularshaped diaphragm to be constructed in such a manner that the vibratile portion thereof has good excursion.
  • Another object of this invention is to eliminate the cracking or breaking out of the corners of triangularshaped diaphragms and to increase the useful life of such diaphragms.
  • a further object is to provide a novel triangular-shaped sound reproducing diaphragm which is thin and light in weight.
  • FIG. 1 is a rear elevational view of a diaphragm embodying the principles of the present invention
  • FIG. 2 is a sectinoal view taken substantially along the line 22 in FIG. 1;
  • FIG. 3 is a rear elevational view of a modified form of diaphragm
  • FIG. 4 is a sectional view taken substantially along the line 4-4 in FIG. 3;
  • FIG. 5 is an enlarged detail segmental top plan view of one corner of the diaphragm shown in FIG. 1;
  • FIG. 6 is a detail segmental top plan view similar to FIG. 5, but showing a modified form of corner structure
  • FIG. 7 is a detail sectional view taken substantially along the line 77 in FIG. 5 and showing the outer edge portion of the diaphragm shown in FIG. 1;
  • FIG. 8 is a view similar to FIG. 7, but showing a modified form of the edge portion shown in FIG. 7;
  • FIG. 9 is another view similar to FIG. 7, but showing another modified form of edge portion
  • FIG. 10 is another view similar to FIG. 7, but showing another modified form of edge portion
  • FIG. 11 is another view similar to FIG. 7, but showing another modified form of edge portion.
  • FIGS. 1 and 2 of the drawings A diaphragm 1, embodying the principles of the present invention, is shown in FIGS. 1 and 2 of the drawings to illustrate one for m of diaphragm contemplated by the present invention.
  • the diaphragm 1 embodies a concave vibratile portion 2 connected by an undulated portion 3 to a mounting strip in the form of flange or rim 4, adapted to be clamped between supporting braces, or the like, of
  • V a speaker, not shown.
  • the vibratile portion 2 is of a convex-rearwardly shape, flaring forwardly and laterally outwardly from a tubular-shaped nipple or apical portion 5 to a substantially triangular-shaped base 6.
  • the base 6 is in the form of an equilateral triangle, and the sides 7, 8 and 9 of the vibratile portion 2 are also equilateral triangles, the lateral edges of each of the sides 7-? engaging respective adjacent edges of each of the other two of such sides.
  • Each of the sides 7-9 is somewhat concave-rearwardly in shape, gradually curving upwardly from the base 6 to the tubular-shaped apical portion 5.
  • a plurality of inwardly projecting ribs 10 are integrally formed in each of the sides 7-9, and extend horizontally thereacross in parallel spaced relation to each other, FIG. 2.
  • the rim 4 of the diaphragm 1 shown in FIGS. 1 and 2 is constructed of three separate strips 11, 12 and 13 of suitable sheet material such as, for example, cloth impregnated with a suitable phenol formaldehyde resin and heat set in the desired shape.
  • Each of the strips 1113 embodies a longitudinally extending inverse trough-shaped undulated portion 3, from the outer edge portion of which extends an outer flange 14, and from the inner edge portion of which extends an inner flange 15, FIG. 2.
  • Each of the strips 11-13 is secured to a respective basal side of the base 6 of the vibratile portion 2, comprising the outer edge portion of the sides 7-9, respectively.
  • each strip 11-13 affords a gluing strip which is mounted on the upper face of the outer edge portion of each of the sides 7-9, respectively, and is secured thereto by any suitable means, such as glue or a suitable plastic.
  • the outer longitudinal edges of the base 6 of the vibratile portion 2 preferably terminate at the inner edge of the undulated portion 3 of each of the respective strips 11-13.
  • the ends of the strips 11-13 are cut at such an angle relative to the length of the strips that the adjacent ends of the strips 11-13 at each of the corners of the base 6 are spaced from each other and flare outwardly from each other at an angle of approximately ten degrees.
  • the vibratile portion 2 of the diaphragm 1 is preferably of one-piece construction and may be made of any suitable material such as, for example, accreted fibrous material.
  • the tubular-shaped nipple 5 is normally formed with a cap portion 16 closing the rear end thereof, and this portion may be clipped or otherwise removed therefrom prior to mounting the diaphragm 1 in a suitable speaker, or the like.
  • the nipple 5 is designed for the attachment thereto of a band carrying a voice coil adapted to operate in the conventional manner of a dynamic loud speaker.
  • triangular-shaped diaphragms had inherent disadvantages such as, for example, cracking 3 or breaking out at the corners; not affording good sound reproducing characteristics; not having good excursion, or the like. With the present invention, these disadvantages are overcome and a practical and eflective triangular-shaped speaker is afforded.
  • the shape and construction of the vibratile portion 2 is such that it tends to vibrate as a unit.
  • the flange 4 constitutes a flexible, pliable, or supple mounting for the vibratile portion 2, and the openings 17 in the flange 4, outwardly of each of the respective corners of the base 6 ofthe vibratile portion 2, in the planes bisecting the respective corners, FIG. 1, enable the vibratile portion 2 to vibrate as a unit, and without breaking out or cracking the corners of the diaphragm 1'.
  • Patent No. 698,467 As is discussed in my copending application for United States Letters Patent, Serial No. 698,467, filed November 25, 1957, now Patent No.
  • a diaphragm 18 is afforded which is constructed in the same manner as the diaphragm 1, except that the sides 19, 2t) and 21. of the vibratile portion 22 are so shaped and disposed relative to each other that the base 24 of the vibratile portion 22 is in the form of a right angle triangle, with the sides 19 and 21 disposed at right angles to each other, and the sides 19 and 21 being disposed at forty-five degree angles to the side 20. With this construction, the side 20 is somewhat longer, and, therefore, larger than the sides 19 and 21.
  • the diaphragm 18 embodies an outer flange or rim 4 constructed of three separate strips 11, 12 and 13, and the sides 19-21 of the vibratile portion 22 embody horizontally extending parallel ribs 10.
  • the flange 25' mounted on the vibratile portion 2 is of a one-piece triangular-shaped construction, the open corners 17 shown in FIG. 1 being eliminated and the only openings at the corners of the flange 25 being openings 26 formed through the undulated portion 3 outwardly of each corner of the base 6 of the vibratile portion 2, the openings 26 terminating at their outer edges in spaced relation to the outer edge of the flange 25.
  • Such construction affords openings in the undulated portion 3 directly outwardly of each of the corners of the vibratile portion, in the planes bisecting each of the respective corners, and with a diaphragm constructed in the manner shown in FIG. 6 the vibratile portion 2 tends to vibrate as a unit to afford good sound reproduction characteristics
  • FIGS. 8 to 11, inclusive, of the drawings different typical variations in supporting flange arrangement, which lend themselves to the practice of the present invention are shown by way of illustration, and not by way of limitation.
  • FIGS. 8 to 11, inclusive, of the drawings different FIGS. 1, 2, 5 and 7 is shown wherein a flange 27 having a substantially flat outer edge portion 28, and an arcuateshaped inner edge portion 29 is mounted on the outer edge portion 30 of a vibratile portion 31.
  • the outer edge portion 39 of the vibratile portion 31 is also substantially arcuate in shape, and the portions 29 and 30 are disposed in overlapping relation to each other to afford an undulated connection 32 between the vibratile portion 31 and the outer edge portion 28, which, unlike the undulated portion 2, is not limited to the supporting flange, but is embodied partially in the supporting flange and partially in the outer edge of the vibratile portion.
  • a vibratile portion 2 is shown connected to a flange 33 which, like the flange 4 embodies an inner edge portion 34 and an outer edge portion 35, the primary difference between the flange 4 and the flange 33 being that the portions 34 and 35 of the flange 33 are separated by a substantially inverted W -shaped undulated portion 36 rather than the single bend of the arcuate portion 3.
  • a vibratile portion 37 having an upwardly offset outer edge portion 38 is secured to a mounting flange 39 having an inner edge portion 46 and an outer edge portion 41 connected by an undulated portion 42, which is convex-downwardly in shape.
  • the inner edge portion 4% of the flange 39 is attached to the outer edge portion 38 of the vibratile portion 37 in overlying juxtaposition thereto, and the inner flange 4t) and the undulated portion 42 of the flange 39 afford a substantially J-shaped member connection between the vibratile portion 37 and the outer edge portion 41 of the flange 39.
  • the vibratile portion 37 is shown connected to a flange 43 which is substantially Z-shaped in cross section, having an inner edge portion 44 connected to an outer edge portion 45 by an upwardly and outwardly extending intermediate portion 46, which affords the undulated portion of the flange 43.
  • the inner edge portion 44 of the flange 43 is connected to the outer edge portion a 38 of the vibratile portion 37 in overlying juxtaposition thereto in the variation shown in FIG. 11.
  • the flanges shown therein will be relieved at the corners thereof, with openings such as, for example, the openings 17 or 26 shown in FIGS. 1 and 6, respectively, extending through at least the outer edge portions of the undulated portions directly outwardly of the corners of the vibratile portion.
  • a concave acoustic diaphragm of substantially triangular configuration said diaphragm including a substantially triangular-shaped vibratile portion merging at its apex into a'tubular portion, each of the basal sides of said vibratile portion having attached thereto a mounting strip and an undulatory interconnecting portion, there being a space between the adjacent ends of said mounting strips and said undulatory portions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
US698468A 1957-11-25 1957-11-25 Acoustical devices Expired - Lifetime US3032138A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US698468A US3032138A (en) 1957-11-25 1957-11-25 Acoustical devices
GB33916/58A GB876426A (en) 1957-11-25 1958-10-23 Improvements in or relating to loudspeaker diaphragms
FR780047A FR1215391A (fr) 1957-11-25 1958-11-25 Diaphragme acoustique triangulaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US698468A US3032138A (en) 1957-11-25 1957-11-25 Acoustical devices

Publications (1)

Publication Number Publication Date
US3032138A true US3032138A (en) 1962-05-01

Family

ID=24805378

Family Applications (1)

Application Number Title Priority Date Filing Date
US698468A Expired - Lifetime US3032138A (en) 1957-11-25 1957-11-25 Acoustical devices

Country Status (3)

Country Link
US (1) US3032138A (fr)
FR (1) FR1215391A (fr)
GB (1) GB876426A (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3573396A (en) * 1964-02-05 1971-04-06 Electronic Res Ass Loudspeaker having improved diaphragm
US5103927A (en) * 1990-08-07 1992-04-14 Heavener James D Variable pattern, collapsible, directional transducer
WO2004017673A1 (fr) * 2002-08-16 2004-02-26 Kh Technology Corporation Haut-parleur pourvu d'un bord exterieur
WO2009080055A1 (fr) * 2007-12-20 2009-07-02 Scan-Speak A/S Renforcement asymétrique d'une membrane
US7717230B2 (en) * 2006-06-05 2010-05-18 Nissan Motor Co., Ltd. Device and method for amplifying suction noise
USRE42490E1 (en) * 2006-06-05 2011-06-28 Nissan Motor Co., Ltd. Device and method for amplifying suction noise
USD905022S1 (en) * 2020-07-22 2020-12-15 Crown Tech Llc Microphone isolation shield
USD910604S1 (en) * 2020-07-22 2021-02-16 Crown Tech Llc Microphone isolation shield

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5332010Y2 (fr) * 1973-11-13 1978-08-09
JPS5481728U (fr) * 1977-11-16 1979-06-09
JPS54105522U (fr) * 1978-01-09 1979-07-25
JPS5748154Y2 (fr) * 1978-02-22 1982-10-22

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB249062A (en) * 1925-03-12 1926-04-15 Paul Georges Huguet D Amour Improvements in or relating to sound recording and reproducing apparatus
US1930328A (en) * 1933-01-25 1933-10-10 Tichenor Sound reproducing diaphragm
US2107757A (en) * 1936-02-29 1938-02-08 Bell Telephone Labor Inc Acoustic device
US2439665A (en) * 1944-01-31 1948-04-13 Rca Corp Sound reproducing device
US2685935A (en) * 1949-05-20 1954-08-10 Hawley Products Co Acoustic diaphragm
DE1004232B (de) * 1952-11-18 1957-03-14 Ernst Romen Nahtlose Membran aus Faserstoff, insbesondere fuer Lautsprecher

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB249062A (en) * 1925-03-12 1926-04-15 Paul Georges Huguet D Amour Improvements in or relating to sound recording and reproducing apparatus
US1930328A (en) * 1933-01-25 1933-10-10 Tichenor Sound reproducing diaphragm
US2107757A (en) * 1936-02-29 1938-02-08 Bell Telephone Labor Inc Acoustic device
US2439665A (en) * 1944-01-31 1948-04-13 Rca Corp Sound reproducing device
US2685935A (en) * 1949-05-20 1954-08-10 Hawley Products Co Acoustic diaphragm
DE1004232B (de) * 1952-11-18 1957-03-14 Ernst Romen Nahtlose Membran aus Faserstoff, insbesondere fuer Lautsprecher

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3573396A (en) * 1964-02-05 1971-04-06 Electronic Res Ass Loudspeaker having improved diaphragm
US5103927A (en) * 1990-08-07 1992-04-14 Heavener James D Variable pattern, collapsible, directional transducer
WO2004017673A1 (fr) * 2002-08-16 2004-02-26 Kh Technology Corporation Haut-parleur pourvu d'un bord exterieur
US7717230B2 (en) * 2006-06-05 2010-05-18 Nissan Motor Co., Ltd. Device and method for amplifying suction noise
USRE42490E1 (en) * 2006-06-05 2011-06-28 Nissan Motor Co., Ltd. Device and method for amplifying suction noise
WO2009080055A1 (fr) * 2007-12-20 2009-07-02 Scan-Speak A/S Renforcement asymétrique d'une membrane
USD905022S1 (en) * 2020-07-22 2020-12-15 Crown Tech Llc Microphone isolation shield
USD910604S1 (en) * 2020-07-22 2021-02-16 Crown Tech Llc Microphone isolation shield

Also Published As

Publication number Publication date
GB876426A (en) 1961-08-30
FR1215391A (fr) 1960-04-19

Similar Documents

Publication Publication Date Title
US3032138A (en) Acoustical devices
US2439665A (en) Sound reproducing device
JPH0416558Y2 (fr)
US3351719A (en) Loudspeaker assembly
US3573396A (en) Loudspeaker having improved diaphragm
US1997790A (en) Acoustic diaphragm
US2685935A (en) Acoustic diaphragm
US3154173A (en) Loudspeaker cone suspension
US2845135A (en) Auxiliary wave propagating and directing attachment for loudspeaker diaphragms
US3722617A (en) Flat diaphragm for sound transducers
US1930328A (en) Sound reproducing diaphragm
US2630189A (en) Mounting of twin acoustic diaphragm assemblies
US1869665A (en) Loud speaker
US1773910A (en) Sound radiator
US1847456A (en) Loud speaker
US2852089A (en) Combined loudspeaker diaphragm and horn
US2582130A (en) Acoustic diaphragm
US2960177A (en) Acoustical devices
US3026958A (en) Acoustical diaphragm
JPH03175800A (ja) 圧電型スピーカ
US1748990A (en) Acoustic diaphragm
US2962109A (en) Acoustical devices
US2718932A (en) Loud speaker construction
US3483946A (en) Loudspeaker
US1845210A (en) Loud speaker diaphragm