US1952169A - Fibrous sound producing means and mfthod of producing the same - Google Patents

Description

March 27, 1934.y ,La HAWLEY 1,952,159

FIERoUs sQuMD PE'oDucIMG MEANS AND METHOD OE PRoDEcING vTHE sAME Filed July 2?, 1931 3 Sheets-Sheet l AVA f/n A 1 A E l l/ f March 27, 1934. J. B. HAwLEY FIBI'OUS SOUND PRODUCING MEANS AND METHOD 0F PRODUCING THE SAME TQS March 27, 1934.

J. B. HwLEY vEnmous somm PnoDUcING MEANS AND METHOD oF PRODUGING THE SAME 5 Sheets-Sheet 3 Filed July 27, 1931 30 affecting the pliability and suppleness of that brous material;

latenteclxM'ar. 27,

UNITED sTATEs-PATENtoFl-ic ,FIBROUS SUND PBODUCING'MEANS AND MF-Tl-IOD 0F PBODUCING- THE SAME Jesse, B. Hawley, Geneva, Ill. Application July 27, 1931, Serial No.A 553,296

1s claims. (Cl. :az-51) i 'f 'I he present invention relates to flbrous'sound by the invention as will later appear, and as are producing means and the method ofproducing 'inherently possessed thereby. the same. v Referring to the drawings:

. Among the objects of the invention is to pro- Fig.' 1 isga 'fragmentary sectional view of a l vide a novel sound producing member composed porous former and ablanking-off means on apart of conjoined strata of diilerent kinds of fibrous of a previously deposited stratum `of hard fibrous materials, such as soft and hard fibres, the ma.- material, and alsoshowing a deposit of a stratum terial being preferably accreted and integrated of soft fibrous material; to form an unitary integral member or unit. The Fig. 2 is a similar view showingthe blankingmember may be of the diaphragmatic type having oil of the stratumof soft brous material and 55 a vibratile portion, such as a cone shaped part, the further deposit of hard fibrous material on anda supporting portion, such as a border or the previously deposited stratum thereof;

marginal part adapted to be secured to a frame Fig.. 3 is a similar view showing a completed or similar supporting means. integrated unitary member before it is stripped l5 The supporting portion is designed to be fiexfrom the porous former; 70 ible, pliable, and supple to afford unimpeded free- Fig. 4 is a similar view showing the blankingdom of movement of the vibratile part when vioff of a central portion of the porous former brated, while the vibratile portionis suiiiciently and the depositing of a thin border stratum of stiff or rigid to maintain its shape whenjactuatedv hard' brous material; y

to propagate or generate'sound. The strata of Fig.5 is a similar view showingthe blanking- 75 the supporting `or bordir Iportion are predomiloi of the border stratum shown deposited in Fig. nantly of soft fibrousmaterial, such as textile 4, and the depositing of a thick stratum of hard fibres, as wool, cotton; linen, and the `like so as fibrous material anda thin stratum of soft fibrous to give the border or supportingportion pliability material on' the centralportion of the former;

and suppleness. Fig. 6 is a similar view showing the blanking- The remainder 'of the border portion may be of oi of the central strata of hard and soft fibrous harder or tougher fibrous material, such as wood materials shown deposited in Fig. 5, and the de- 'Y pulp, paper pulp, and the-like, so as to give the' lpositing of a thick border stratum of soft fibrous border portion durability or toughness, yet not material and a thin border stratum of hard ii- 85 part. A A Fig. 'lis a similar view showing the blanking- The vibratile portion is designed to be suflioil of thick and thin border strata shown deposciently rigidor stiff to sustain the load of propaited-in Fig. 6, and the4 depositing of athick'central gating or generating sound or sound waves, withstratum of hard fibrous material;

out distortion, and without strains, the strata of Fig. Bis asimilar view showing the blanking- 90 1 this portion being predominantly of the harder or off of a border portion of the porous former, and tougher fibres, such as wood pulp, paper pulp, the -depositing of a thin stratum of soft fibrous and the like, the remainderof the strata being material on the exposed portion of the porous of softer fibres so as to give to the vibratile por former;

40A tion some resiliency and to reduce or eliminate Fig. 9 is a similar view showingthe blanking- $5 parasitic resonance and the like, without affecting 1T 01; the deposit ShOWD in F18- 8, and the d ethe stiffness of the vibratile portion as a whole. DOS'JIISv 0f a thick Stra-tum 0f Soft brous ma- Another object ofthe invention is to provide a telfial 0n uw exposed bordel' Portion. the

` novel process 'for producing the above mentioned fonnerf and 5.150 9' deposit 0f a thm stratum 0f m0 article. The various strata or layers o'r lamin l'fglsrllsmelalflwn sid thick stratum are alternately deposlted, accreted and inte Fig. 1o. is a similar View showing the b1 .l I grated P0 a Prus ffmer"b1ank1ng means off of the border strata and the depositi f u being used to blank off a portion of the former ng o thick stratum of hard fibrous material, and a thin or previously deposited` fibrous material, when stra-tum of son nbrous material. and 105 l depositing other fibrous material on the exposed Fig 11 is a similar View showin'g -the'bmukmg part of the former or previously deposited fibrous off ofthe central Snam-UA and the depositing of mtefalf' l thick 'stratum of soft fibrous material.

Otherobjects, advantages, capabilities, process Referring now more in detail to the drawings, steps, and structural features are comprehended the invention is practiced inconnection with a 'no' porous former comprising a plate 1 having a central conic portion 2, a marginal or border portion 3, and an intermediate rolled or undulated portion 4. At the edge, this plate has a flange 5 adapted to rest upon a table (not shown) capable of being lowered into a fibrous bath for submerging or immersing the former, and of being raised out of the bath after deposit of nbrous material on the former from the bath. Any suitable means may be used to effect such immersion into and withdrawal from a bath.

To the table may be connected a suitable suction duct whereby suction or a partial vacuum may be effected in a chamber 6 deiined bythe table, flange 5,- and plate 1. i

The plate 1 has a largenumber of apertures or holes 7 for the passage or the fluidal vehicle or medium, such as water, of the bath. The upper surface of the plate l is preferably formed with grooves 8 which give into the drain holes 7.

Upon the ridges 9 of the plate 1 may rest a thin plate 10 having an innumerable number of ne holes or pores l1. ,Upon this plate 10 may resta .reticulated or foraminous member 12, al

'though this member may be .omitted if desired and the plate l0 be used to perform the function of member l2. The use of the member 12 sometimes facilitates the stripping of the wet brous blank, although the stripping of such a blank from the plate 10 is practical, when the member -12 is omitted.

When it is desired to make a diaphragmatic sound producing member with the vibratile or conic portion entirely of hard fibrous material, such as wood or paper pulp, and the supporting or border portion mainly of soft fibrous material, such as textile fibres, as wool and the like, and partly of hard or tough brous material, as wood or paper pulp, the process used is illustrated in Figs. l, 2 and 3 of the drawings.

The former is iirst submerged in a pulp bath, and with the suction effective in the chamber 6, the water of the bath is drawn through the interstices of the member 12, the holes 11 of plate 10, grooves 8 and holes 7 of plate 1 and thence to the suction duct. This effects a deposit, accretion ,and integration of pulp bres into a thin stratum 13 over the surface of the, porous member 12.

With the suction i Ibeing still eifective, the former and table are raised out of the bath, and then a stopper plate or blanking-ofi member 14 having a conic portion 15 and a curved or curled border portion 16 shaped to conform with a part of the 4undulated or intermediate portion 4 of the plate, vis placed upon the conic or vibratile portion 17 and a part 18 of the juncture or intermediate portion 19 of the pulp blank 13. The border portion 20 of this blank, as also the remainder 21 of the juncture 1 9, are left exposed.

The former is now immersed in a brous bath of soft fibres, such as wool, cotton, or the like, so that a thick stratum 22 of s oft brou's material is deposited, accreted and integrated upon and with the exposed border portion 19 and curved part 21 ofthe blank, thus forming a border stratum portion 23 and a curved juncture stratum part 24. 'The hard and soft bres knit together and are infused and integrated so that there is an unitary integral mass composed of different strata of fibrous material with no demarcation or cleavage. The former -is then raisedout of this bath. See Fig. 1.

The blanking member 14 is then removed, and another blanking member 25 comprising a border blanking oi portion 26 and a curved orlcurled Ystratum portion 29 and -juncture stratum part 30, is deposited, accreted upon,l and integrated and united with the stratum 17 and the inner edge portion 31 of the stratum 22 of the border portion of the blank. See Fig. 2.

so l' The blanking-oi member 25 may then be removed, and the device again submerged in the pulp bath to deposit a thin stratum 32 to the full extent of the blank, this stratum comprising a conic stratum portion 33, border stratum portion 34, and juncture stratum portion 35. The

stratum 32 is deposited and accreted upon, and is integrated, infused and knitted with the conjoint strata 28 and 22, so as to form an unitary integral brous blank, as clearly shown in Fig. 3.l

The various strata are so blended together that there is a continuity of materials without demarcation, yet one portion, such as the conic or vibraN tile portion, is mainly of pulp fibres, and another portion, such as the border of supporting portion,. is predominantly of soft or textile fibres; such as wool, cotton, flax, etc., the thin strata of pulp iibres in this portion giving the border portion durability and resilience without detractlng from the pliability and suppleness of this border portion,

The blank, thus produced, may be stripped from the mold or former, as by air pressureacting through the former to blow off the blank or by suction above the blank and former to lift otl` the blank. The blank may then be compressed, if desired, dried, and treated with suitable materials such as latex for proofing thediaphragm against moisture and other climatic conditions, and also other treating substances, as lacquer,

and the like for adding stiffness to the conic portion, or other characteristics or properties as desired.

In use the diaphragm is supported by way of the border portion which may be held between clamping means or the like, and the apicalpart of the conic portion is suitably connected to an electrical actuator or driver, or carries a voice coil operatively located in an electrodynamic gap. The conic portion vibrates to produce sound, and part of the border portion and the juncture between the border portion and the conic portion flexes pliably to permit free movement of the vibratile conic portion of the diaphragm.

The form above disclosed comprises a conic vibratile portion wholly of pulp iibres, and the border or supporting portion mainly of soft fibres with laminas of harderflbres, as at the surfaces thereof, but the blank may be made with any number of strata of hard and soft fibres with varying degrees of thickness in the different por tions of the diaphragmatic member.

In Figs. 4, 5, 6.and 7 is shownthe mode of vproducing sucha member whereby the vibratile por tion predominates in pulp bres with a thin stratum, as a core, of soft bres, while the border or supporting portion predominates in soft bres l the inner edge of the border stratum 37 and the outer edge of the portion 43 knitting, integrating, and uniting to lform a continuous integral stratum.v See Fig. 5.

'I'he device is then raised out of the pulp bath,

l and is then submerged into another bath of soft fibrous material for the depositing of a thin stratum 44 on the exposed conic portion of the stratum 42 as .clearly shown in Fig.f5. The stratum 44 accretes upon and integrates with the stratum 42 to form an unitary integral mass of materials.

After raising the device from the bath, the blanking-off member is removed and another blanking-oi member 45 is placed upon the conic portion of the blank, as on the stratum 44. The

member has a curled border 46 which is disposed in tapered spaced relation over the stratum portion 43 so'as to provide a beveled splicing space 47 between the part 46 and the stratum portion 43. See Fig. 6.

The device is then submerged in a bath of soit fibrous material and a thick stratumv 48 is den posited and accreted upon, and integrated and united with the stratum 37 and stratum portion 43 to form an integral united mass of materials,

` the` soft bres also accreting in the space 47 and forming a beveled splicing portion 49 which is also integrated and united with the pulp portion 43 as valso with the edge portion of the stratum 44. See Fig. 6.

soft ilbrous material, and then submerged in a bath of harder brous material, such as pulp, and a thin stratum '50 of pulp is deposited accreted upon and integrated and infused-with the stratum 46.` See Fig. 6.

Then, the device, is raised out of the bath, the blanking-ofr member 45 removed, and the blanking-oi member 38a may then be placed upon the stratum 50, the curled part 39a beingspaced above 50 the stratum portion49 to form a beveled .or splice ing space 5l.

The device is then submerged in a pulp bath whereupon a thick stratum 52 of pulp is deposited and accreted upon and integrated and infused with the stratum 44 and stratum portion 49, the

brous material entering into the space 5l to accrete thereon and to integrate with the tapered stratum part 49 and also to integrate and unite with the inner edge portion of stratum 50. SeeA v Fig. 7.

.rials with varying degrees of hard and soft fibres.

' The blank may then be removed and nished as above mentioned in connection with the articles shown in Figs. 1, 2 and 3fy If desired. the strata may be arranged convers'ely to that shown in Figs. 4, 5, 6 and 7, as

.shown in Figs. 8, `9, 10 and 11.

In this case` a bl'anking-off member 5l having a curved portion 52 is first placed upon the border and juncture portions of the former, and then *.75 l the devicevis submerged into al bath of soft fibrous lThe device is then raised vfrom the bath of material to depositand accrete upon the exposed conic portion of the former, a thin stratum 53 of soft brous material. See Fig. 8.

After raising the device out of the bath and removingthe blanking-off member 51, another blanking-off member 54 having a curled portion 55, is placed upon the stratum 53 with the part 55 in tapered spaced relation with the juncture portion 40 of the former so as to form a beveled space 56 between parts 55 and` 40.

The device is then submerged into a bath of lsoft fibrous material whereupon 'a thick stratum 57 with a beveled splicing stratum portion `58 is deposited and accreted upon the exposed parts of the former, and integrated, united and infused with the outer edge portion of the stratum 53. See Fig. 9. v.

The device is then raised from the bath and then submerged into a bath of hard brous material, such as pulp, to form a thin stratum 59 which is deposited and accreted upon and integrated,

vinfused and united with the exposed portion of stratum 57. See Fig. 9.

After raising the device from this bath, the blanking-oi member 54 is removed, and another blanking-oi member 60 having a curled portion 6l, is then placed upon the stratum 59 with the curled part in tapered spaced relation above the splicing lstratum portion 58 to form a beveled space 62 `between part 6l and stratum portion 68.

The device is then submerged into the pulp bath, and a thick stratum 63 of pulp is deposited and accreted upon the exposed stratum 53 and in the space 62 to form a tapered stratum portion 64, and also is integrated, united and infused with the stratum 53 and stratum portion 58, and also with the inner edge portion of the stratum 59. See Fig. 10.

The device may then be 4submerged into a bath of soft fibrous material to form a thin stratum 65 deposited and accreted upon and integrated, united and infused with stratum 63.

After raising the device from this bath, the blanlring-off member 60 is removed and blanking-oli ymember 54a is placed upon stratum 65, Withthe curled part 55a in tapered spaced relation over the beveled splicing stratum portion 64, to form a beveled splicing space 66 between part 55L and stratum portion 64.

The device is then submerged in a bath of soft iibrous material to form a thick lstratum 67 with a beveled splicing stratum portion 68 in the spae 66, which are deposited and accreted upon Vstraturn 59 and stratum portion 64 and in space 66, and also integrated, united and infused with stratum 59, stratum portion 64, and the outer edge portion of stratum 65. The device may then be raised out of the bath and the blanking-off meme ber 54a removed. See Fig. ll. In this way the blank is composed of diierent materials in vary ing degrees of thicknesseawith a preponderance of 4pulp er like fibrous material in the conic or vibratile portion,- and a Vpreponderance of soft :dbrous material in theborder or supporting portion, all integrated, united, infused and knitted i together to form an unitary integral blank.

The blank may then be removed, dried, and treated as above described.

By'using blanking-ol members with curled borders, to provide tapered spaces Ytherebeneath, g

- and juncture portions of the unit whereby the .to produce sound.

While I have herein described and upon the drawings shown a few illustrative embodiments of' the invention and a few methods of producing the same, it is to be understood that the invention is not limited thereto but comprehends other constructions, compositions, details, arrangements of' parts, features, and process steps without departing from the spirit of the invention. Any number` of strata of materials may be accreted and integrated in accordance with the manner of this invention, without limit. As for example, the unit shown in Fig. 7 may have one or more thin strata of soft fibres and one or more thick strata of hard fibres in the conic portion, and one or more thick strata of soft fibres, and one or more thin strata of hard fibres in the border portion of the unit. Likewise, the unit shown in Fig. 11 may have one or more thick strata of hard fibres, and one or more thin strata of soft fibres in the conic portion, and one or more thin strata of hard fibres, and one or more thick strata of soft fibres in the border portion of the unit.

Having thus disclosed the invention,

I claim: A

1.V A vibratile sound producing member of diaphragmatic type comprising integrated strata of different fibrous materials.

2.- A vibratile sound producing member of diaphragmatic type comprising integrated strata of alternate grades of fibrous materials.

'3. A vibratile sound producing member of diaphragmatic type comprising integrated strata of plant fibrous material and animal fibrous material.

fi. A vibratile sound producing member of diaphragmatic type comprising integrated strata of soft fibrous material and hard fibrous material.

5. A vibratile sound producing member of diaphragmatic type comprising integrated strata of pliable fibrous material and stiff fibrous material.

6. A vibratile sound `producing member of diaphragmatic type comprising integrated strata of pulp fibres and textile fibres.

7. A sound producing diaphragmatic member, comprising a vibratile portion and a supporting portion, said vibratile portion being composed of integrated strata of different fibrous materials, and said supporting portion being pliable for af fording free movementof said vibratile portion.

8. A sound producing diaphragmatic member, comprising a vibratile portion and a supporting portion, said vibratile portion being composed of integrated strata of soft and hard fibrous materials, and said supporting portion being pliable for affording free movement of said vibratile portion.

9. A sound producing diaphragmatic member, comprising a vibratile portionand a supporting portion, said vibratile portion being composed of integrated strata of soft .and hard fibrous materials, the hard fibrous material predominating to give said vibratile portion stiffness for propagation of sound when vibrated, and said supporting portion being pliable for affording free movement of said vibratile portion.

10. A sound producing diaphragmatic member,

comprising a vibratile portion and a supporting portion, said supporting portion being composed of softand hard fibrous materials, the soft fibrous A in the supporting portion to give it suppleness and the hard fibrous material predominates in the vibratile portion to give it stiffness, said portions beingintegrated at their juncture.

12. A sound producing diaphragmatic member comprising a vibratile portion and a supporting portion, said vibratile portion comprising a thick stratum of hard fibrous material and a thin stratum of soft fibrous material integrated with said thick stratum and being stiff for propagating sound when said vibratile portion is vibrated, said supporting portion comprising soft fibrous material integrated with said vibratile portion and being supple to afford freedom of movement of said vibratile portion when vibrated.

13. A sound producing diaphragmatic member comprising a vibratile portion and a supporting portion, said supporting portion comprising a thick stratum of soft fibrous material and a' thin stratum of hard fibrous material integrated with said thick stratum and being supple to afford freedom of movement of said vibnatile portion when vibrated, said vibratile portion comprising hard fibrous material integrated with said supporting portion at their juncture and being stiff for propagating sound when said vibratile portion is vibrated.

14. Asound producing diaphragmatic member comprising a vibratile portion and a supporting portion, said vibratile portion comprising a thick stratum of hard fibrous material and a thin stratum of soft fibrous material integrated with said thick stratum andbeing stiff for propagating sound when said vibratile portion is vibrated, said supporting portion comprising a thick stratum of soft fibrous material and a thin stratum of hard fibrous material integrated with said thick stratum and being supple to afford freedom of movement of said vibratile portion when vibrated, said vibratile and supporting portions being integrally united at their juncture.

15. In a process of making a'fibrous sound producing member, the steps of accreting and integrating conjunctive strata of different kinds of fibrous materials, including the blanking-off of a portion while causing the accretion and integration of another portion.

16. In alprocess of making a fibrous sound producing member, the steps of accreting and integrating conjunctive strata of different kinds of fibrous materials on different portions of a porous former, including first accreting and integrating one portion while blanking-off another portion, and then accreting and integrating another p0rtion while blanking-off the said one portion.

17. In a process of making a fibrous sound producing member, the steps of accreting and integrating adjunctive strata of soft and hard fibrous materials, and accreting and integrating therewith respectively and together adjunctive strata of hard and soft fibrous material, to form an unitary stratified integral member.

18. In a process of making a fibrous sound producing member comprising a vibratile portion and a supporting'portion, the steps of forming the vibratile portion with accreted and integrated strata of different kinds of fibrous materials, forming the supporting portion with accreted and integrated strata of different kinds of brous materials, and integrating said portions at their juncture.

19. In a process of making a fibrous sound producing diaphragmatic member having a, viloratilev portion and a supporting portion, the steps of accreting and integrating thin and thick strata of soft and hard fibrous materialsvrespectiveiy,

.accreting and integrating thick and thin strata

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