US1873153A - Sound reproducing device - Google Patents

Sound reproducing device Download PDF

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Publication number
US1873153A
US1873153A US427855A US42785530A US1873153A US 1873153 A US1873153 A US 1873153A US 427855 A US427855 A US 427855A US 42785530 A US42785530 A US 42785530A US 1873153 A US1873153 A US 1873153A
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United States
Prior art keywords
armature
semi
rigid
vibratory
attached
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Expired - Lifetime
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US427855A
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English (en)
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Price Sidney Leopold
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Individual
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Individual
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00—Transducers of moving-armature or moving-core type

Definitions

  • This invention relates to electromagnetic sound reproducing devices of. the type in which ai diaphragm, cone or other member is adapted to be operated by anarniature arranged in a magnetic eld,'the invention being particularly suitable for loud-speakers for use'in connection with radio telephony or for gramophone pick-ups.
  • 'It is an object of the invention to provide 1i) a device of the typedescribed which, while being of simple-construction and inexpensive to manufacture, and which will give substantially uniforml response to aA wide band of frequencies, aiiords animprovedV tone, volunie-and quality of reproduction.
  • the invention consists broadly in mounting, suspending or supporting the armature directlyor indirectly upon resilient or flexi- -ble or other means adapted to aioidA comparatively" unrestricted freedom to vibrations/communicated according to the various 'speech modifications of the energizingor controlling currents.V
  • the invention comprises supporting the armature of a device of the type described from a' support by means comprising a-flexible or resilient or suspensory member (or members) ⁇ which may be attached at one or both ends to thevsemi-rigid member! or other V support. y
  • the ⁇ armature may be directly supported by thel support, being attached to the flexible or spring member or members, or 'the armature may be firmly attached to an arma* ture carrying member, prefer-ably oi' non'F magnetic material, which is itself connected l by theflexible or spring member' or members to-the semi-rigidmember or mainsupport.
  • the armature or intermediate member may be provided with a spindle for attachment to a diaphragm or cone of a loudspeaker, tele- Ehon'e receiver or the like, andthe whole may e arranged in conjunction with a magnet system between which and' the armaturev ad- 4'5 justment may be effected as is usual in the artf.-
  • the armature may be attached, asby' riVet-ing,screwin'g or the like, to a4 semi-rigid armature carrying PATIENT @ma member consistinggior example, of a stout strip or bar of phosphor bronze or other nonmagnetic material, which member is hinged at or towards one end to a semi-rigid meinber or main support.
  • V Attached adjacent to the other end oit' the armaturel carrying member is the longer limb of a member in the form of a springof roughly U-shape, while the shorter limb is securedthrough an aperture to the main support or supporting member.
  • the hinge may be formed by a pairoflateral extensions onthe intermediate bar or member bentor otherwise formed'to embrace the semi-rigid member or fitinto apertures inthe said'members, being further secured whe-reinecessaryl by soldering, brazing or otherwise.
  • the ⁇ hinge is replaced by a pivot or pin (or pins) on the .armature carrying-member, which pin may convenientlybe seated'in a .depression formed inthe semi-rigid memlber or .be otherwise secured by aid of the pin or pins.
  • Vthe pivot may be carried by th-e semifrigid support member and the seating by the armature carrying memben- Y l f
  • the armature may bepositioned centrallyof the ⁇ armature carrying bar or towards or away (from the spring connection.I l
  • VAcacordingjto ⁇ another arrangement, vthe armature carryingmember carrying the armature-andspindle as indicated above, may
  • Such extensions may be in the form of strips of the material of the member not completely detached therefrom, or
  • the extensions may be parallel to each other and, Vwhere the member is rectangular, may be Aattached at diagonally opposite or at adjacent", corners of the rectangle.
  • the extensions may make any desirable angle with the .p longitudinal edges ofthe armature carrying or intermediate member, such as an mediatemember may be equallyv applied to verse edges.
  • the extensions are arranged at adjacent corners the extensions are preferably, maintained in the i same straight line, and the armatureis preferably arranged on the member so that the centre of mass of the combination lie'sapproxi-l mately on this line.
  • a plurality of y resilient extensions may be provided' at Veach end of the armature carryingor intermediate.
  • a resilient extension may be arranged at each corner, preferably extending longitudinally, or a single extension or pin may be arranged atthe vmid points of the ends of the bar or member;
  • the armature. carryingy or intermediate member carrying the armature may be attached by a plurality of small leaf springs to the semi-rigidv member; for example, a leaf or other spring may be attached adjacent to or at the extremitiesof the intermediateimember.
  • the leaf springs maybe replaced by U-shaped springs having one arm longer thanthe other, the longer arm preferab'lypassing through an aperture in the rigid member and being attached to the armature carrying or intermediate member or'armature, the ⁇ shorter arm being rattached to the semi-rigid member.V
  • Figure 1 shows an armature carrying or intermediate member carrying the armature 'ands mounted on a semi-,rigid member.
  • c Y Figure2 is a View of another arrangement.
  • Figure 3 showsthe device in cross section arranged in a loud-speaker unit.
  • Figures 4to 7 show various formsthatthe suspension of the armature carrying or intermediate member may take as viewed from the ⁇ sideto which the armature is alixed.
  • Figure 8 shows another method of suspension.
  • 1l is a supporting member comprising a strip of phosphor bronze, brass orl the like which is semirigid. It is provided with holes 2 for affix- ⁇ ing to asupport and with holes 3 and 4f. .Attached .to the strip 1 by means of a hinge .justment'being 5 and a spring 6 is an intermediate or armature carrying membery 7, substantially rigid and of non-magnetic material.
  • the spring 6 is attached as by soldering, or riveting to the member 7 and themember 1 at .the points 8 and 9, respectively, and one limb of it passes through'the hole 3 which isv suliciently large toA allow free vmovementof.the vlimbof the spring.
  • a rod 11 is also aixed to the intermediate member at a point about the centre of the armature, so as-toV pass through the hole 4, which is such as to afford clearance.
  • the hinge may take the form of small p11()v rods attached firmly to the membervf? ortheV i .armature and seating on lconvenient faces on the-member 1 .or -vice-fversa.
  • TheVspring-'G may be of phosphor bronze, steel or other suitable resilient material.
  • Figure 3 the device s hownin Figure 2 is villustrated in position-in a loud-speaker unit.y Screws 16 connect the memberl to the casing 17 of the unit which is provided with the usual permanent magnets ⁇ 2l and pole kpieces 2O carrying coils 19. An arrangement for adjusting the distance between the pole pieces and the armature 10 is' provided, ad-
  • Figuresa to 7 I have shown the armature v10 attached to ⁇ themember 7'as .in the case of Figure 1. Instead, however-,of providing a hinge.' or pivot atrone end of the memberI provide resilient extensions at bothfends of. the member 7 lying in the plane of said member-.'ni'orn direct attachmentto struts or the like extending outwardly from the tace of themember l.”
  • The-,extensions 25,27, and 31 are ormedof the material of the. member 7 .and are of such sectionaslto give thev required resiliency.
  • the extensions 29 are pieces of suitabler wire or Vstrip* attached to the member 7 by soldering or otherwise.
  • the resilient mounting would be applied to the support of the needle and intermediate the latter and the diaphragm.
  • the member l may constitutepart of the sound boX or may be attached thereto.
  • the stylus bar may be resiliently supported as in the case of the armature described above, being either hinged adjacent to the end farthest from the ⁇ needle or stylus holder, or supported by a plurality of springs or resilient eX- tensions.l Y
  • I may attach the armature or armature-carrying ⁇ member to. thevsupport by one ormorewires or the like Vstruts projecting:substantiallynormal ⁇ lyfthererom, tvvojbeing ⁇ arranged towards onefend ofthe armaturesor1armaturecarry memberV and one towards theo-pposite end' thereot and preferably equidistant form the other two.
  • I may lmake the supportof a resilient bar, frame or the like, attached .at itsY ends to a ⁇ substantially rigid support-1 ing structure. ⁇ Again, I ⁇ may increasethe llength of 'thewires or struts4 so that they i become more resilient and so'render'unneces-r sary any further ⁇ resilient member.
  • stoodI include any spring having parallel limbs, whether the limbs are oined by: a ysimple bend or one or more coils of the material. t .Y
  • a vibratory member including a magneticarmature
  • a diaphragm actuating stylus connected to the vibratory member, a semi-rigid supporting member in the form of a reed and at least one resilient member attaching the vibratory Y member to the semi-rigid supporting member s so as toaiford to the vibratory member comparatively unrestricted Vfreedom to vibrate.
  • a vibratory member including a magnetic armature
  • a vibratory member including a magnetic armature
  • a diaphragm actuating stylus connected to the vibratory member, a semi-rigid supporting member in the vform of a reed, a hinge adjacentto one end of the vibratorymembei ⁇ connecting said vibratory member to Vthe semi-rigid supporting member and a resilient connection between the vibratory member and the semi-rigid supporting member arranged adjacent to the other end of said vibratory member.
  • a vibratory member including a magnetic armature, an electromagnet system arranged adjacent the armature, a diaphragm actuating stylusV connected to the vibratory member, a semi-rigid supporting member in the -lform of a reed, a hinge adjacent to one end of the vibratory member connecting said vibratory member to the semi-rigid supportingmember and a resilient connection between the Vibratory member and the semi-rigid supporting member arranged adjacent to the other end of said vibratory member.
  • a vibratory member including a magnetic armature, a diaphragm actuating styluscone nected to the vibratory member, a semi-rigid supporting member in the form of a reed and a plurality of resilient springs attaching the vibratory member to thesemirigid supportingmember so as to afford tothe vibratory member comparatively unrestricted freedom to vibrate.
  • bratory member including a magnetic armature, a magnetsystem arranged adjacent the armature, a diaphragmactuating stylus connected to the vibratory member, a semi-rigid supportingv member in the formnoi a reed s and a plurality of resilientsprings attaching the vibratorymember to the'semi-rigidy supporting member so as .to afford to the vibratory member comparatively'unrestricted Vfreedom yto vibrate.
  • a vif bratory member including a magnetic armature, and an intermediate member carrying the armature, a magnet system arranged adjacent the armature, a diaphragm actuating stylus connected to the vibratory member, a semirigid supporting member inv thepfolrm of a reed yand resilient extensions on said intermediate member, attaching'the vibratory member to the semi-rigid supporting member so as to aiiord to the vibratory mem-- ber comparatively unrestricted. freedom to vibrate.
  • an electromagnetic device for reproducingsound means for producing a magnetic held, means for causingvariations in said magnetic field, a semi-rigid support in the. form of Ya reed, a vibratory member comprising a magnetic armature and at least one resilient connection between ⁇ said semirigid support and the'vibratory member supporting the vibratorymember withthe armature .in the magnetic field.
  • kIn an electromagnetic device -or re-k producing sound means for producing a magnetic field, means for causing variations in said magnetic field, a vibratory member comprising a magneticy armature, a diaphragm actuating stylus attached to the vibratory member, a semi-rigid support in the form of a reed from which the vibratory member is suspended and atleast one U-V shaped resilient ,connection between said semi-rigid support and the vibratory member supporting the vibratory member with the armature in the magnetic field.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
US427855A 1929-02-20 1930-02-12 Sound reproducing device Expired - Lifetime US1873153A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5661/29A GB333884A (en) 1929-02-20 1929-02-20 Improvements in or relating to sound reproducing devices for telephony or the like applications

Publications (1)

Publication Number Publication Date
US1873153A true US1873153A (en) 1932-08-23

Family

ID=9800253

Family Applications (1)

Application Number Title Priority Date Filing Date
US427855A Expired - Lifetime US1873153A (en) 1929-02-20 1930-02-12 Sound reproducing device

Country Status (3)

Country Link
US (1) US1873153A (de)
DE (1) DE601280C (de)
GB (1) GB333884A (de)

Also Published As

Publication number Publication date
GB333884A (en) 1930-08-28
DE601280C (de) 1934-08-18

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