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5-1; H‘, 1946., K. A. FALCONER » 2,430,815 METHOD AND APPARATUS FOR APPLYING ASBESTOS TO WIRE Filed Oct. i0, 1942 '24 4 She'ets-Sheet 1 NW. 12, 1946. K. A. FALCONER 2,410,815 METHOD AND APPARATUS FOR APPLYING ASBESTOS TO WIRE Filed Oct. 10, 1942 ‘ 4 Sheets-Sheet '2‘ > 3% @ mvsn-ron , NOW 12, 1946METHOD K. A. FALCONER 2,410,815 APPARATUS FOR APPLYING ASBESTOS To‘wIRE Filed Oct. 10,‘ 1942 4 Sheets-Sheet s INVEN'I’OR . Nov. 12, 1946. 2,410,815‘ - K._ ‘A.’ FALCONgER ‘METHOD AND APPARATUS FOR APPLYING ASBESTOS TO WIRE Filed Oct. 10,- 1942 9m. 4 Sheets-Sheet 4 N__NN_ COER, Patented Nov. 12,1946 2,410,815 iUNi'i'ED STATES ‘PATENT OFFICE 2,410,815 METHOD AND APPARATUS FOR APPLYING ASBESTOS ‘1'0 WIRE, Kenneth A. Faiconer, Auburn, Mass. Application @ctober 10, 1942, Serial No. 461,596 ' ' ' 8 Claims. (Ci. 57_5) 2 ‘ ' The present invention relates to an improved method and apparatus for applying ?brous mate rial to an advancing wire and more particularly to applying asbestos ?bers to an electric conduc . tor and the like, an important object being to provide a practical method and apparatus for winding a ?eece of asbestos ?bers about an ad vancing conductor immediately after such a ?eece of ?bers has been stripped from the doffer roll of a conventional form of carding machine. An 10 important object of the invention is to provide eifective means for coiling a ?brous ?eece around an advancing conductor without destroying the 27, 1938. The present invention aims to improve over this practice by preserving‘ the parallel relationship of the ?bers in the ?eece imparted thereto by the usual clothing of the doifer roll of the carding mechanism. , - As will be more fully apparent as the descrip tion proceeds, the present invention provides an improved method involving advancing a conduc tor lengthwise while continuously feeding . a sheet-like ?eece of loosely associated substan tially parallel ?bers of asbestos in a direction ap proximately normal of the line of travel of the conductor, exerting a combined longitudinal and centripetal force on the ?eece whereby it is both normal disposition of ‘the ?bers in the ?eece which are arranged in substantially parallel rela 15 compressed circularly and advanced longitudi nally, but being supported out of contact with tion by the carding machine, it being a particular the advancing wire, whereupon the thus applied , object of the present invention to preserve the parallel relationship of the ?bers. In a practical ‘ ?eece is further compressed and condensed directly around and in contact with the wire in sense, this is regarded of importance since the density of the ?eece is maintained by virtue of 20 such a way that the substantially parallel asso ciation of the ?bers of the ?eece is not disrupted the fact that the ?bers are not disentangled.) A particular problem encountered in the wrap to any material extent, thus the density of the ping of a ?eece about an advancing wire or con ?eece is not lessened by ?ber disentanglement as ' contemplated in the above mentioned Obermaier ductor is involved because such an asbestos ?brous ?eece coming from a carding machine is 25 patent. The invention also consists further in the provision of a novel combination of mutually inherently weak and incapable of withstanding interdependent instrumentalities e?ective to any substantial tension. To this end I aim to carry out the method above described. interpose conveying means between the do?fer For complete understanding of the invention, roll of the carding engine and a hollow rotary cone which is adapted to coil the ?brous ?eece 30 reference should be made to the accompanying drawings, the following detailed disclosure and around the conductor. . the appended claims. It is broadly old in the prior art relating to In the drawings: means for covering electric conductorsto pro Figure 1- is a plan view of the principal parts of: vide means for transferring a ?brous sheet-like apparatus for carrying out the novel method; ?eece‘ of cotton directly from a carding machine Figure 2 is a front elevation thereof; to a rotatable device adapted to apply such ?eece 35. Figure 3 is a section on line III-HI of Fig to the conductor. Such idea is broadly shown in ure 1; ' an ,old patent granted to John Robinson, No. Figure 4 is a plan view similar to Figure l illus 529,411, dated November 20, 1894, but so far as I am aware, the apparatus of the Robinson patent 40 trating a modi?cation; has never been successfully demonstrated and Figure 5 is a front elevation of a part shown . experience has shown that apparatus which works satisfactorily with cotton will not neces- ' in Figure 4; , Figure 6 is a vertical section taken on line sarily suit ‘when handling asbestos ?bers.» For VI-VI of Figure 41 > . handling asbestos ?bers I deem it highly de-, 45 Figure 7 is a view similar to Figure 3 illustrat sir-able to interpose transferring means between ing a modi?cation including pneumatic means the carding machine and the device which ap for buoyantly supporting the ?brous ?eece; plies the ?eece to the conductor. It has been Figure 8 is a view similar to Figure 2,ishowing heretofore proposed to strip asbestos ?bers from ‘the front elevation‘ of the parts illustratedv in -‘ vthe do?er roll of a carding machine to destroy 50 Figure 7. their parallelism and to drop such ?bers in a Referring in detail to the drawings, a cable or haphazard manner in such a way that they be electric conductor wire'such as indicated at w in come entangled and then' coiled around an ad vancing conductor._ Such a machine is shown in Obermaier Patent No. 2,131,598, dated September the drawings is adapted to be withdrawn from a supply reelill by meansyof a draw-oil drum 12 carried by a shaft i4 driven from any suitable 2,410,815 source of power. The drum I2 is effective to feed or advance the wire or cable w longitudinally in a continuous manner in juxtaposition to the peripheral surface of the do?er roll [6 of a con ventional form of carding mechanism which is provided on its exterior with conventional ?ne wire teeth I8 known as the carding clothing. The carding machine has delivered thereto a sup ply of asbestos ?bers in suitable form. This 4 verges in the direction of travel of the advancing wire. The rotary action of this whirler die is effective to compress the ?bers of the ?eece cir cularly around‘the exterior of the advancing con ductor and also to in?uence the longitudinal mo tion of the ?bers covering the wire. In Figure 3 of the drawings the stipple showing is an attempt to illustrate the action of stripping the ?eece from the‘do?er roll and supporting it while en ?brous supply is acted upon in the conventional 10 route therefrom over the transfer member 40 to the rotating hollow cone which is effective to cause an initial compression and impart at least some degree of longitudinal feeding movement to the ?brous mass. It is to be understood, how ‘ ?eece is stripped from the doifer roll i6 by a con 15 ever, that the feeding movement of the ?brous mass, once it is arranged in wrapped relationship ventional form of carding machine comb 20 se to the advancing conductor, is effected jointly cured to the outer ends of arms 22 carried by a by the cooperation of the rotating cone, and the shaft 24 which is oscillated by a known form of rotating whirler die 46 in cooperation with the vibrating mechanism which is enclosed in a hous ing 26. Since this vibrating mechanism consti 20 feeding movement imparted by the rotating cap stan l2. tutes no part of the present invention,’ it is not In the modi?cation illustrated in Figures 4, 5 further illustrated, su?ice to say, that motion is and 6, the parts cooperate in substantially the transmitted thereto by a pulley 28 operably. con same manner as above set forth with the excep nected in'any suitable manner with the carding tion that in this embodiment of the invention. mechanism drive. I ' the means for transferring the fibrous ?eece from A hollow cone-like member 30 is secured to the the doffer roll l6 to the rotating cone 30 com extremity of a hollow sleeve 32 which is rotatably prises a conveyor belt 5|]- which is trained around mounted in a suitable bearing 34, the sleeve being supporting pulleys 52 and 54. Mounted on the continuously rotated by a pulley 36 connected in any suitable manner with the drive for the card 30 supporting shaft for the pulley 54 there is also a pulley 56 which is connected by a crossed belt 58 ing machine. As the carding machine is oper with a pulley 59 secured to the sleeve 32. As thus ated it will be understood that the comb 20 above arranged it is apparent that as indicated by the referred to will be intermittently vibrated and arrows in Figure 6 when the cone rotates clock the cone will be continuously revolved. The sleeve 32 and cone 30 are provided with an 35 wise the pulleys 52 and 54 will be driven in coun terclockwise direction, thus causing the upper aligned axial passageway 38 through which the stretch of the conveyor belt 50 to travel inra wire or cable 10 is advanced longitudinally. In‘ proper direction from a region adjacent the doffer the embodiment of the invention shown in Fig manner by the carding machine so as to produce a sheet-like ?eece of asbestos in such a way that the elemental ?bers thereof are arranged in sub stantial parallelism. This asbestos sheet-like roll toward the rotating cone 30 so as to thus ures 1 to 3, inclusive, as the ?eece is stripped from the doffer roll [8 it is received by a transfer mem 40 effectively support the ?imsy ?brous ?eece and ber 40. Thus there is no haphazard dropping of ?bers as taught by the Obermaier patent, nor positively feed it into a position for cooperative engagement with the rotating cone. In the modi?cation shown in Figure 7 the parts is there any disentanglement, it being a particu are arranged as in Figure 3, but in addition there lar feature of the present invention to provide an operative means for transferring the ?eece 45 to, I here provide pneumatic means for buoyantly supporting the ?eece while it is being transferred with the ?bers thereof in the same parallel rela from the conveyor member 40 to the underside tionship which they occupy while on the do?er of the rotating cone 30. To this end I have shown roll of the carding machine. In this embodiment in this ?gure a plurality of parallel pipes 50 which of the invention the transfer member 40 takes the form of a rotating‘ cylinder of small diameter 50 are approximately coextensive in length with the cone 30, the pipes being connected with a header which turns in a'direction opposite to the direc 62 leading to a suitable sourceof compressed tion of rotation of the do?er roll It? as will be air, the upper portions of the pipes being per apparent from the arrows in Figure 3. This forated so as to permit the emission of air jets transfer member 40 carries a spur gear 42 which meshes with a similar gear 44 secured to the 55 64 therefrom. In this modi?cation I have also illustrated an air pipe 56, the outlet ori?ce 68 sleeve 32. Thus it'is apparent that the transfer of which is in the form of a nozzle located near member 40 rotates in a direction opposite to the the butt or large end of the cone 30. The pipe direction of rotation of the cone 30 as indicated 66 is connected with the same source of supply by the arrows in Figure 3. The rotary motion of the transfer member '0 60 as that to which the pipes B0 are connected and the function of the jet of air discharged from the delivers the ?eece to the lower portion of the nozzle is to assist in advancing the flimsy ?brous rapidly rotating cone 30. The action is such that ?eece longitudinally along the rotating cone 30. the frictional drag imparts a centripetal force to It is to be understood that the mechanism de the ?bers of the ?eece, thus tending to draw them inwardly toward the axis of rotation of the 65 scribed can be operated without the use of the pneumatic means shown in the modi?cation of cone while at the same time the rotary motion Figures 7 and 8 and the use of this pneumatic of the cone tends to advance the ?eece longitudi nally in the same direction as that in which the conductor is traveling under in?uence of the wire 70 Located in juxtaposition to the small end of the cone 30 there is rotatably mounted a whirler die 45 mounted in suitable bearings and driven from any suitable source of power. This whirler die has a central opening 48 therein which con 75 feeding action exerted by the capstan i2. _ means is contemplated chiefly when applying relatively heavy fibrous coating to the advancing conductor. While I have described quite precisely a pre ferred method and apparatus, the practicability of which has been demonstrated in practice on a commercial scale, it is not to be construed that I am limited thereto since various modi?cations 2,410,815 , 5 v > may be made by those skilled in the art without departure from the invention as de?ned in the appended claims. ' ’ I claim: _ 6 . , and a rotary die havinga central bore therein converging in the direction of travel of the con ductor and e?ective to compress the ?bers of the ?eece about the conductor whereby the substan tially' parallel association of- the ?bers of the ?eece is not disrupted to any material extent byv 1. In the manufacture of insulated electric conductors the method which comprises ad vancing a conductor lengthwise, continuously disentanglement. ' feeding a ?eece of loosely associated substantially 5. Apparatus for applying asbestos ?ber to an parallel ?bers of asbestos in a direction approxi- _' electric conductor comprising means for advanc mately normal to the line of travel of said con 10 ing the conductor lengthwise, carding means for ductor, exerting a combined longitudinal and cen tripetal force on the ?eece whereby it is com pressed circularly and advanced longitudinally While supported out of contact with the advancing ' wire and then circularly compressing the thus condensed ?brous mass directly around the wire whereby the substantially parallel association of ‘forming a ?eeceiof asbestos whose ?bers are dis- _ posed in substantially parallel relation, means in terposed between the carding means and the ad vancing conductor for positively supporting the ?eece as it is delivered by said carding means, a hollow rotary member through which the con-, ductor is fed e?‘ective to c'oil, the ?eece and ad the ?bers of the ?eece is not disrupted to any ma vance it longitudinally about the advancing con terial extent so that the density of the ?eece is ductor while out of contact therewith, and means not lessened by ?ber disentanglement. 20 for compressing the ?brous mass of the ?eece 2. Apparatus for applying asbestos '?ber to an about the advancing conductor. ‘ electric conductor comprising means for advanc 6. Apparatus for applying asbestos ?ber to any ing the conductor lengthwise, carding means for electric conductor comprising means forv advanc forming a ?eece of asbestos whose ?bers are dis ing the conductor lengthwise, carding means for posed in substantially parallel relations, a means forming a ?eece of asbestos whose ?bers are dis interposed between the carding means and the posed in substantially parallel relation, a posi traveling conductor for supporting and trans tively driven conveyor means interposed ‘between versely feeding the ?eece as it is delivered by the carding means, a hollow rotary member through the carding means and the advancing-conductor for supporting the ?eece as it is being delivered which the conductor'is fed effective to coil the 30 by said carding means, a hollow rotary member ’ ?eece and advance it longitudinally about the through which the conductor is fed effective to advancing conductor while out of contact there ’ coil the ?eece and advance it longitudinally with, and means for compressing the ?brous about the advancing conductor while out of con ?eece about the advancing conductor. ' tact therewith, and means for compressing the 3. Apparatus for applying asbestos ?ber to an 35. ?brous ?eece'about the advancing conductor. electric conductor comprising means for. advanc 7. Apparatus for applying asbestos ?ber to an a ing the conductor lengthwise, carding means electric conductor comprising means for advanc for forming a ?eece of asbestos whose ?bers are ing the conductor lengthwise, carding means for - disposed in substantially parallel relation, a forming a ?eece of asbestos whose ?bers are dis means interposed between the carding means and 40 posed in substantially parallel relation, means the traveling conductor for supporting and trans for stripping the?eece from the carding means, versely feeding the ?eece as it is delivered by the and pneumatic means for maintaining a stratum carding means, a hollow rotary memberthrough of air below the advancing conductor effective to which the conductor is fed effective to coil the »‘ buoyantly support the ?eece. as it is being stripped ?eece and advance it longitudinally about the from said carding means. advancing conductor while out of contact there 8. An apparatus'of the class described comwith, and a rotating die having a converging bore - prising, means for longitudinally advancing a effective to compress the ?brous ?eece about the wire, means for feeding a ?eecelof loosely asso advancing conductor. ' _ 1 ciated substantially parallel ?bers in a direction 4. Apparatus for applying asbestos ?ber to an 50 approximately normal to the line of travel of electric conductor comprising means for advanc said wire, a rotary hollow member through which ing the conductor lengthwise, carding means for the wire passes and which is effective to coil forming a ?eece of asbestos whose ?bers are dis said ?eece and advance it longitudinally, means posed in substantially parallel relation, transfer for pneumatically supporting the ?eece while it means for positively feeding said ?eece trans 55. is en route to said hollow member and rotary versely of the line, of travel of said conductor, a means for compressing the ?brous ?eece about, hollow rotary cone through which the conductor the wire as it emerges from said rotary hollow travels e?’ective by its rotary motion to coil the ?eece received from the "transfer means and to exert a longitudinal feeding movement thereto, member. ' KENNETH A. FALCONER.