US377484A - Maueice gandy - Google Patents

Description

(No Model.

. 3 sheets-sheet 1. M. GANDY. CHAIN 0R ROPE BBLTING POR DRIVING MACHINERY. No. 377,484. Patented-Feb. 7', 1888.

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CHAIN oli-ROPE BBLTING POR DRIVINGMAGHINE'BY. y No. 371.484. y Patented.]5,eb.`7,l888.

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MfGANDY. 'GH-AIN 0R ROPE BELTING PQR DRIVING MAGHINBRY. BT01371484) i Patell'ed'FebfL` 1888.

l MMM UNITED STATES: Pa'drinwr'C)F1ucn;.lf A

' rions reasons.

MAURICE GA/NDY, oFLivEnrooL, ENGLAND, Y

CHAIN canoes BELTING Foamivlvme'MACHINERY.

SPIE!(ZfllCl-"IC ATIONy forming 4part of Illiettersi` Patent N o. 377.484, dated February 7kI 1888. l

Application iiledhehruary 16, 1887. Yerlai No.2l7,769. (No model.) i

To @ZZ vwhom it may concern,.- v f 1 Be it known that I, MAURICE GANDY, a subject of the Queen of Great Britain, residing at l16 represent longitudinal sections of bands for driving machinery made according toiny present invention, and the pulleys upon which they run. Figs. 2, 4, 6, 8,10, 12, and Y17 represent cross-sections of the same, respectively; and Figs. 13, 14C,y and l5 represent a novel device for connecting the endsof the ropes which may be used in the practice of said invention.

Bare wire ropesrunning in grooved pulleys have heretofore been used as belts or bands for driving machinery. While such ropes jhave greatstrength, still they have two obvious and well-known defects-wiz., they are decient in gripping-power'and are quickly worn out and become useless by chafing upon the grooves in the metal pulleys upon which they run. Round or angular belts of leather have been used,and while they ar'e satisfactory as far as gripping-power is concerned, they are not entirely'free from objections. Their fibrous character permitsy them constantly to stretch and makes it necessary frequently to shorten them to maintain their driving-power; besides, they are very expensive and are not as strong` as wire-ropes. l

I am also aware that metal chains and wire ropes provided with friction-surfaces have been used; but in all such belts with which I am acquainted the frictionrblocks or surfaces have been fashioned and combined or attached tothe chain or rope in such a manner as to make the belt as a wholeobjeetionable for va-y of improvements on this class of belting, and the novel features will be particularly pointed My present invention consists out in the claims `concluding this specication. v 'f n vReferring to the drawings, Fig. 1, A rep-- resent the links of a chain.v vIB representsa removable link for the purpose of uniting the two ends of the chain. v All the small or alternateA links A may be -made of. the const ruc-`l tion represented by yl, or as many of them as may be deemed advisable may be made ofJ such construction, soA that the chain 'may be readily opened and joined again at any point.,V

rIhe friction-blocks may be made wholly .ofV

wood, leather,fpaper, cork,v ulcanized rubber,

or other suitablematerial, or a combination of any of these, or they maybe made with ametalsurface.

and size to lit the pulleys, and are separated by intervening `spaces-to allow them to rfun around the pulley without-binding. MTo' utilize their entire surface for 'gripping the pulley, I usually curve or hollowthese sections to correspond with the periphery of the pulleys on which they are to run, as illustrated in the drawings. This feature mayhowlever, t (Y in many cases be dispensed with,especially" Y when the blocks are made o ffor covered'. with vulcanized rubber-or cork, or other compressible material, as in that case ythey will `accommodate themselves to the periphery of the pult 1 I ley and gripitthroughout their'entirelength Y when made straight. f f. y

l In carrying my invention into practice I may use any form of. chain. Severaldesir'- able forms are inustratedin rigs. 1, 3, 5, 7,

Ini-Fig. lvthe core of the grippingblock', formed of wood, is .illustrated fbyD,"

andy 9.

upon which the gripping material `C'is attached in any suitable manner and by any desirable means. In Fig. 3 the core of the fricf tionblock is made of a tube of metal, D',

preferably steel, upon which-the gripping? surface C is attached, preferably .by rivets( (Not shown in fthe-drawings.) Near the ncenter of lthe tube D', in the inside of said` tube, a groove is cut yinto which the link Af its,

thereby preventing the friction-block moving' l longitudinally on said link, but leavingsu-f-y icient play between thetwo to allow thebl'ock to tilt upon the link as apjoint `or socket.

Ico

Fig. 5 shows a square belt, substantially of similar construction vwith the round belt illustrated in Fig. 1. Fig. 7 shows a square belt of similar construction in many respects to the round belt illustrated in Fig. 3. In Fig. 7, however, the friction-blocks are held upon their respective links by means of checks F F, inserted insidel of the tubes D. Immediately in top of the metal tube D' a layer of paper is placed, which in time is covered by a layer of cork, or leather, or rubber, C. In Fig. 9 the friction-blocks are attached directly to the long links A, between which are placed the short links A', which likewise permit the blocks to find their bearings on and accommodate themselves to the pulley. These several figures illustrate various forms of chains which may be advantageously employed in the practice of my present invention, as well as 'various forms of friction-blocks, and various means of attaching the blocks to said chains, and are deemed sufficient to indicate clearly the general practice of my invention when link chains are employed.

Instead of using a link chain I may employ a wire rope, as indicated in Figs. 1l, l2, 16, and 17. Figs. 11 and 12illustrate a V-shaped belt made to run on a grooved pulley, and Figs. 16 and 17 illustrate a flat belt made. to run on a plain pulley. The wire ropes H are attached to the core I of the belt, made of wood, metal, or other suitable material,which is covered with a friction-surface, G.

For the purpose of giving the necessary flexibility to the belt and to permit the several friction blocks to accommodate themselvesjwithout restraint to the peripheryof the pulley, I attach the blocks to the rope by a cleat or similar device, grasping the wire rope at intervals and presenting only suicient bearingsurface on the rope to resist the strain, thus making an easy clinging fastening, and permitting the blocks to tilt and accommodate themselves readily to the face of the pulley.

I prefer to use a plurality of small ropes placed side byside instead of a single rope of larger diameter. By so doing I distribute the pressure more evenly throughout the width of the belt, and I remove the liability of the belt to twistandV insure the friction blocks or cushions running straight in the grooves, and, besides, as the several ropes may be spliced at different points, the belt is made of more uniform strength throughout its entire length. I further improve the action of these friction-blocks by making the bearing in said blocks for the connecting rope or chain as low as possible, and, where convenient, below the upper edges of the grooves in which they run, thus increasing their stability and diminishing the danger of tilting or twisting in the grooves.

If desired, the ropes may be spliced in any Well-known way; but I prefer to join the ends by the means illustrated in Figs. 13, 14, and 15. Fig. l5 illustrates aferrule of uniform external diameter, cut with a screw-thread and having a diminishing or tapering internal diameter, as clearly shown in Fig. 13. Such a ferrule is slipped upon each end of the rope, small end first, so that the larger end comes at the extreme end of the rope. The strands of the rope are then forced apart by a pointed tool, and melted solder or cement is poured between the strands, attaching to the strand and making a solid rivet-headed mass and se curing the wires firmly in the ferrule. The inside of theferrule may be previously tinnedor coated with other metal to which the solder will adhere. In order to increase the space between the strands to receive the solder or cement and to eliminate from the ferrule all objectionable elements, I burn out the hemp core of the rope before pouring in the solder. The two ends ofthe rope are then drawn together and an internally-screw-threaded ferrule (having a right-hand thread cut in onehalf of its length and a left-hand thread cut in the other) is screwed upon the ferrules L until the necessary tension is secured. To this ferrule I then preferably apply a suitable covering to avoid the noise incident to the striking of the metal ferrule against the face of the pulley.

I have now described the general features of my invention and indicated various forms in which it may be applied; and I understand that any formal change not affecting the principal or general features of the invention will be included in the foregoing description and in the following claims.

It will be observed that one of the principal features of my invention consists in constructing a chain or wire-rope belt in which the individual friction-blocks will independently and freely adapt themselves to the surface of the pulley. This may be accomplished by attaching the blocks to a chain, so that they may have an independent motion of their own, as illustrated in Figs. 1, 2, 3, 4, 5, 6, 7, and 8, or by attaching the blocks firmly to the links and providing intermediate links between them, as illustrated in Figs. 9 and' 10, or by attaching blocks to a wire rope with a limited bearing-surface and play, so arranged that the rope may bend and describe practically a IOO IIO

true arc in passing around the pulley and then straighten'itself out in running between the pulleys. These, or substantially similar devices,may be employed,so as to give to the friction-surfaces that degree of adaptability and independence of motion which is essential to the best forms of belt.

What I claim, and desire to secure by Letters Patent, is-

1. A belt for driving machinery, consisting of the combination of a flexible metal band, friction-blocks attached thereto, and means, substantially as described, for permitting said blocks to tilt on said band and to accommodate themselves to the surface of the pulleys on which they run.

2. A belt for driving machinery, consisting of the combination of a'iiexible metal chain,

n, V377,484 k v v3 formed of long andshortlinks alternately,and bination of a metall chain, friction-blocks atro.

friction-blocks attached thereto, all substantached thereto, and means, substantially as tially as described. described, for limiting the llongitudinalimove- 3. A belt for driving machinery,y consisting ment of said block on said band.

friction-blocks composed of a metalshellcovlof the combination of a flexible metal band and M ATI-RICE. GANDY;l A

ered with a friction-surface, substantially as Witnesses: f

described. M.` LEE SMITH,

4. In a belt for driving machinery, the com- Y 'CHARLES LADE.

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