US443302A - storie - Google Patents

Description

(No Model.) 5 Sheets-Sheet 1.

A J. D. STORIE. I

APPARATUS FOR TREATING DRIVE CHAINS.

No. 443,302. Patented Dec. 23, 1890.

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J. D. STORIE. APPARATUS FOR TREATING DRIVE CHAINS.

No. 448,302. Patented Dec. 23, 1890.

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(No Model.) 5 Sheets-Sheet 3.

J. D. STORIE.

APPARATUS FOR TREATING DRIVE GHAINS.

No. 448,302. Patented Dec. 23, 1890.

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A APPARATUS FOR TREATING DRIVE CHAINS. No. 443,302. Patented Dec. 23, 1890.

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APPARATUS FOR TREATING DRIVE GHAINS.

Patented Dec. 28, 1890.

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, UNITED STATES Irricni PATENT JAMES DOUGLAS STORIE, OF OSI IAlVA, ONTARIO, CANADA.

SPECIFICATION forming part of Letters Patent No. 413,302, dated December 23, 1890.

Application filed October 21, 1889.

To all whom it may concern: Be it known that I, JAMEs DOUGLAS STORIE, of the town of Oshawa, in the county of Ontario and Province of Ontario, Dominion of Canada, have invented certain new and use ful Improvements in Apparatus for Treating Drive-Chains; and I do hereby declare that following is'a full, clear, and exact description of the same.

My invention has special reference to apparatus designed for treating drive-chainsthat is to say, chains made up of links, each having a head or knuckle adapted to be looked over the end bar of the neighboringlink; and the main objects of the present apparatus are to provide for the testing of the chain after the links have been put together, with the view of determining the strength and limit of strain, as well as to ascertain whether any of the links are imperfect, the limbering of the chain, and the loosening of the joints, so as to increase its flexibility, and the windin g of the chain. By this apparatus I do away with the separate chain-stretchers heretofore required, and in applying the test as to strength I am enabled to regulate or vary the amount of tension according to the size of the links and purpose for which the chain is to be used.

I am aware that a machine has been used for Winding these drive-chains where the chain has been passed around a number of horizontal rollers previous to being wound upon the last of the series; but it has been impossible to wind any but very long coils, and there has also been great difficultyin setting the end of the chain in connection with the spindle upon which the same has to be wound, and retaining it in that position while the winding is going on, and, furthermore, no provision has been made for thorough limbering or simultaneous testing, nor has it been easy to remove the coils from the said spindle after the winding is complete, and another serious objection has been that the links are often bent during the operation. In winding, the chain passes round a key or spindle of peculiar construction pro ectin g from a table, upon which the chain rests on its edge,

and when the winding is complete the said spindle is quickly depressed or withdrawn semi No. 327,732, (No model.)

from the center of the coil in such manner as to leave the latter intact.

The distinguishing feature of my invention is the use of a horizontal table, as before mentioned, on which the chain can rest edge upward, instead of being supported on horizontal rolls carried from a vertical support, as heretofore, and it is by this reversal of position that I am enabled to secure the combinations and arrangements of parts whereby the chain can be simultaneously tested, limbered, and wound. The horizontal support provided by the table allows scale-beam mechanism used. in the test to be combined with the limbering mechanism by elements common to both, and as regards the winding mechanism, it may be said that without this horizontal support afforded by the table, whereby the chain can travel along its edge upward, such winding mechanism would be comparatively useless; and I would also remark that the testing mechanism (acting upon the chain while it is supported by the table, and therefore deprived of the force of gravity by which in other machines, by being allowed to fall to the floor, it is prevented from clogging such testing mechanism) requires the winding mechanism for this purpose in the absence of such natural force. This windingkey is not claimed in the present application, asit is reserved for inclusion in another application for Letters Patent tiled by me February 18, 1890, under Serial No. 0,952.

For full comprehension of the machine and of its different arrangement of parts, combinations of mechanism, and details of construction, reference must be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate like parts.

In said drawings, Figure 1 is a diagram plan representing my mechanism with endless chain, arranged for limbering and test-lug only. Fig. 2 is a front or side view of the machine. Fig. 3 is a diagram plan showing an arrangement of parts when it is desired to wind separately without or after testing or limbering chains of specific lengths. Fig. a is an enlarged plan (top) of the machine (with end portions of the table andauxiliary rollers omitted) showing a chain in the act of being wound, as well as limbered and tested. Fig. 5 is a bottom plan of same. Fig. 6 is a transverse section 011 line 6 6, Fig. 2, but on a larger scale; Fig. 7, a cross-section on line 7 7, Fig. 5; Fig.8, a cross-section online 8 8, Figs. 4 and 5, also showing oiling device; Fig. 9, a transverse section on line 9 9, Fig. 2, but on same scale as Figs/l and 5; Fig. 10, a section 011 line 1O 10, Figs. & and 5; Fig. 11, asec tional detail of oiling device; Figs. 12 and 13, details of journal; Fig. 11, a sectional detail of one of the adjustable auxiliary rollers; Fig. 15, a detail of one of the auxiliaryfixed rollers; Fig. 16, a detail showing windingkey or spindle depressed below the level of the table; and Fig. 17, an enlarged detailof head of said spindle, showing slot to receive the end link of the chain and sides configurated to suit the shape of the center of the coil.

For the sake of clearness I will first describe the apparatus used for the main purposeviz., the simultaneous limbering, testing, and winding or ceiling of a chain haviug especial reference to Fig. l and other figures projected therefrom.

A is any suitable table, upon which the made-up chain is laid (or fed from the driving or other machine) edge upward, upon the upper surface of which are arranged two shoes B 13, between which the chain treated passes, one B being rigidly bolted to the table, but capable of adjustment to suit different sizes of chains, and the other 13' carried by bolts b, passing down through slots a and fixed to a slide Z), (see Fig. 7,) working in proper guides a on the underside of said table, resistance being ollfered to the movement of this slide and the shoe B by a 1OVGPDOL111 G, pivoted to a hanger or lug a" on the under side of the table and having the point of its shorter arm bearing against the end of such slide. This beam is graduated and has a sliding weight C,whereby the amount of resistance to the movement of the slide and shoe may be varied to regulate the friction and suit different sizes of chains passing between the shoes. 0 is a loop-support for the beam. These shoes also have the effect of offering, in connection with rollers to be described, the proper resistance to the strain put on in testing the chain, as will be hereinafter explained.

In line with the shoes and on the surface of the table are arranged two series of rollers D D and D D, having vertical spindles (Z (Z.

and d d. The spindles (Z (I pass through slots (2 in the table A and are screwed into a lever E, pivoted at E to the under side of the table at a point beneath the shoes, while those d (1 pass through slotsfand are screwed into slides F, adjustable in guideways by screws F, provided with suitable crank-handles F F G is a sprocket-wheel mounted on the top end of a vertical counter-shaft G, n'ojeeting up through apertures g in table A, and G is a guide-plate adjustable to suit different sizes of such wheels, pivoted to the table near such sprocket-wheel and serving to prevent the chain being carried around by it, as it might do, instead of passing on to the windingkey, as required.

The counter-shaft G is rotated through suitable gearing G by the driving-shaft G", (only partially shown,) and communicates motion through pulleys H li and belt ll to the winding key or spindle, to which the end of the chain is secured. This key or spindle J'*" is a very important element of my machine and is, as before mentioned, reserved for inclusion in my said application No. $0,952. It embraces a head-piece J, to project through an opening a in the table and above the surface of same while winding, having a slit in it, as shown in Fig. 17, to receive the end link, shown in Fig. 4c, and its sides configurated to suit the shape of the center of the coil formed by the straight surfaces of, say, the first three or four links encircling it, the shape being approximately quadrangular. For different sizes of l nks diilerent-sized heads with same configuration mustof course be used, and, as shown in Fig. (i, the arrangement is such that they can be screwed into the top of a plunger, preferably formed in two parts J J' screwed together, which forms part of the spindle. The plunger rests on a spring J confined within a sleeve J, which sleeve carries the pulley 11. encircles the plunger and serves to rotate it through a pin J, projecting from the same into a slotj in the sleeve, this slot also serving to regulate the upward movement of the plunger. The spindle secures a vertical bearing in a recessed foot-plate for the end of the sleeve J", and a boss on the under side of table A for the upper part J of the plunger.

J" is a lever pivoted atj to a hanger from the table A, slotted to encircle the part J of the plunger and bearing, when it is desired to depress the same, upon a collar-J", secured beneath it to the part J.

lVorking in connection with lever E, (see Fig. 5,) previously mentioned, is another lever K, pivoted at 7.: to the under side of the table at a point to the left of the slide 11', so that it will cross beneath same and serve to operate such slide through a pin 7.:, projecting from its under side. A handle 7; projects up through a slot at (in which also the spindle of the outermost roller 1) works) in the table from the free end of lever K, whereby it may be moved by hand at any time to operate the slide Z).

L is a support for the free ends of the levers E and K, and M is an adjustable bearingpiece carried on the end of lever K and be ing in contact with lever E, so that the latters movement will be imparted to lever K. A chain N, with one end secured to the end of lever It, passes over a sheave N, (preferably with hectagonal or like periphery to secure a good bearing for the chain and avoid bending of its links,) carried in a hanger from the under side of the table, and has its other ated about centrally of the machine.

end attached to a scale-beam 0, (shown in Fig. 2,) pivoted to a leg or standard A, situ- This scale-beam O is weighted at both ends, for reasons to be explained farther on, the lefthand portion being graduated and furnished with a sliding weight or poise O, in addition to any desired nominal weight hung from the end, and the right-hand end having attached to it a cord 0 which passes over a sheave O hung from the table, and carries a like nominal weight,

It is desirable that the shoes B B should not be subjected to any more strain or wear than is necessary, and, in fact, that they should act more in the capacity of an automatic clutch with power only just sufficient to check momentarily at the start of the machine the pull upon the chain while the testing takes place, the greater portion of the resistance being furnished by a set of auxiliary rollers P P, arranged in line with the shoes, and between which the chain is passed before reaching them. In order that the resistance of these rollers may be varied and different-sized chains acted upon, those P are made adjustable in slots 19 in the table, Fig. 14, showing a detail of rollers P, and Fig. 15 the same of rollers P. The arrangment for adjusting rollers P consists in squaring their spindles for the application of a wrench, and by loosening them from the nuts on their ends, which nuts are held against turning by guidestripsp along the slots 19, they can be moved to new positions and tightened up again. These rollers are used to secure extra limbering and to assistthe retaining shoes, as mentioned. v

\Vith the exception of mentioning that Q is the lever for throwing the machine into and out of operation, (the usual and wellknown clutch mechanism which it works not being shown,) and that R is a recessed guarddisk mounted loosely on a spindle passed through a slot in the table and screwedinto a slide R, provided with adjustingscrew R provided with crank-handles R so that it (the disk R) will serve to prevent the chain leaving the sprocket-wheel by any chance, I have described the portions of the apparatus used for securing the main object of the invention, and it would perhaps now be as well to explain the operation of these parts in performing the simultaneous limbering, testing, and winding or coiling of a chain.

In order that the testing operation may be clearly understood, let us suppose that a No. 45 chain has been selected for operating upon. According to the prevailing standard this chain is calculated to successfully stand a test of eight hundred pounds and to break at twelve hundred pounds, under which circumstances it must be arranged that such eighthundred-pounds strain shall be applied to it. The chain, as shown in Fig. 4, has an end link located in the slit in the winding-key, which has its head projecting above the surface of the table, is then fitted over the teeth of the sprocket-wheel G, and arranged between the rollers D D and shoes B B, and continuing, passes between the auxiliary rollers P P, from which point, when it is a mat ter of simultaneous limbering, testing, and winding, as now being explained, it requires no further arrangement other than placing it upon its edge throughout its entire length on any part of the table. (The arrangement shown in Fig. 1, as previously mentioned, and which is more fully described further on, is for simultaneous limbering and testing only, the winding not being performed.) When the chain is located as just described, I arrange upon the left-hand end of the scale-beam eight hundred pounds and a like amount 011 the cord attached to the right-hand end. This whole amount on the left can be made up by the nominal weight or divided between a less nominal and the sliding weight, according to the usual manner of weighing; I might at this point state that the use of the sheave O and hanging the eight-hundredpound weight over it in the way shown is for the purpose of diminishing the total weight that has to be borne by the pivot of the scale-beam without diminishing in anyway the weight required on the left-hand end of ICU ance constitutes a hold against the movement of the chain through them, and it being desirable that only about a half,or four hundred pounds, say, of this amount should be furnished by the shoes, for reasons previously mentioned, the remaining amount must be supplied by the rollers DDPP. By means of the weight on the graduated lever-beam O, with its shorter arm bearing against the slide b operating the shoe B, and the sliding weight on the beam 0, this amount can be approximately if not positively gaged, for, supposing the rollers are arranged to furnish a proportion of the amount varying from a third to two-thirds of the eight hundred pounds required, it but remains to shift the weight toward the end of the beam 0 until the deficiency is made up. It will be noticed that in Fig. 4 the rollers D are in line with those D, this being the normal position of the parts, their spindles at the front end of the curved slots, and as they are mounted on the lever E it is naturally in the same line; but on reference to Fig. l the rollers D are seen to be located at the rear ends of the slots and to be in such aradial line as the lever E which carries them would assume it moved in that direction on its pivot-point. It will now be seen that if the rollers D are to be moved into the position shown by Fig. 1 the left-hand end of the scale-beam 0, weighted with sixteen hundred pounds, which is connected to the lever E by chain N and holds such lever with the rollers D in line with the rollers D, as shown in Fig. 4:, such a weight must be lifted, and in the performance of this lies the test. Before starting, then, there is a frictional resistance or hold of eight hundred pounds against the passage of the chain under treatment in the direction of the sprocket-wheel (which is the pulling mechanism) imposed by the shoes B B, rollers D D, and auxiliary rollers 1 P; and, furthermore, sixteen hundred pounds weight or resistance against the movement of rollersD D onlever E to the position shown in Fig. 1i. e, toward the sprocket-wheel.

The reason for using sixteen hundred pounds on the beam to secure the eight hundred pounds test will be readily seen from the following explanation: It being desired to test every portion of the chain as it passes along without interruption, it is necessary that at one end of a given portion there shall be arranged a yielding hold or check and at the other a continuous pull, while the weight creating the given tcst strain is applied intermediate of the two extremities. N ow the whole efficiency of the intermediate weight of sixteen hundred pounds connected to the lever E is at a certain period of the operation divisible, as it were, into eight hundred pounds of what we will call weight-pressure, and eight hundred pounds of yielding frictional pressure-that is to say, the moment the grip of the shoes on the chain is released by the movement of lever E the chain can be pulled by the sprocket-wheel through them, and whatever resulting reduction there may be in the frictional hold or pressure of the shoes caused by the movement of the lever, such diminishment is compensated for bythe eight hundred pounds of yielding frictional pressure on beam 0. As is well understood, if two forces of eight hundred pounds each are pulling in opposite directions at each end of a chain or rope there is only a strain of eight hundred pounds on the chain, because one force acts only as the necessary resistance to the pull of the other, therefore where one of such forces is frictional and a yielding one, as is the case with the the temporary eight hundred pounds hold of the shoes and rollers, there must be a weight of sixteen hundred pounds provided, which, while it will not interfere with the movement of the chain, will yet offer the eight hundred pounds necessary resistance to equalize the pull on the chain and afford also the eight hundred pounds weight necessary to secure that amount of strain.

The machine is started by moving the lever Q, which will be connected with any suitable and well'known clutch mechanism (not necessary to be shown here) which can throw into working-gear with any suitable power the drivin g-shaft G, the sprocket-wheel being rotated in the direction indicated by the arrow, Fig. 4, and the winding-key being rotated in the same direction simultaneously with it. The pull of the sprocket-wheel on the chain draws the rollers D into the line shown in Fig. 1, raising the scale-beam O, and the movementof the lever E with such rollers is communicated to lever K,which in turn acts upon the slide 1), through pin 7a, to ease the grip of the shoe B on the chain and so allow it to be drawn forward and wound into a coil around the windingkey, the rollers D remaining in the same position through almost the whole operation and every part of the chain being tested. The length of lever E is such that not more than twenty pounds extra pull is required to move shoe B, and this extra amount can be included in the test. I would here explain that there is always a maximum of eight hundred pounds strain on the chain between the sprocket-wheel and the rollerD nearest to it, even until the last link leaves such roller, for this reason. So soon as the last link leaves the shoes, which is one point and the end roller nearest the sprocket-wheel the other point between which the resistance is being yieldingly applied, the rollers D begin to travel, with their sixteen hundred pounds pressure, back toward the rollers D, thus sustaining the eight hundred pounds of friction and eight hundred pounds weight to the last. lVhen the coil is finished the machine is stopped and lever J depressed to lower the winding-key and disengage the coil, leaving it in a compact condition ready for storage. For different chains tests of different strains will be given, these being determined by the weights applied to the scale-beams, the.

\Vhen it is desired to simply limber and test the chain without Winding, the arrangement shown in Fig. 1 is used. X is a roller placed near the end of the table, around which roller the chain passes, its function being, in connection with the tension-roller X, to keep the chain taut. The roller X. is mounted on a spindle projecting up through a slot in the table from a slide provided with adjustingscrew X and crank-handle X, and by this means can be made to take up the slack in the chain, which bears on it before the machine is started. The operation in this case will be the same as previously described, with the exception of winding, the chain in this case simply passing on the outside of the key, or it might be taken only through the rollers P P and D D and shoes and around the sprocket-wheel and rollers X. X, avoiding the key entirely.

\Vhile the entire amount of resistance required to temporarily hold the chain, as before explained, could be furnished by the shoes B B, instead of by them and auxiliary rollers combined, there is an advantage in the use of the latter not to be disregarded, and

that is the avoiding of any chance of the chain reaching the shoes in an uneven condition or kinked, whereby the chain might easily be broken.

The rollers D are made adjustable with relation to those D, in order to accommodate links of different sizes, for in the case of larger links they would be drawn toward the front (where thecrank-handles F are situated) of the machine, and for smaller links moved inward by turning the crank-handles F and, further, it might be desirable in liinbering to run the chain several times through the machine, increasing the bend each time by moving the rollers D farther inward.

It will be observed with reference to Figs. 9 and 10 that the rollers D are grooved where the side bars of the links forming the chains come in contact with them, this being for the purpose of providing a proper bearing for the links and to avoid any chance of bending, as it can easily be seen that the links being straight their side bars, if a recess is not provided, would conform to the shape of the roller. It is only necessary for the rollers D to be grooved, because the parts of the links that bear on those D are the heads. If desired, however, both sets of rollers could be grooved.

In order that the chain can be thoroughly oiled during its passage, as described, I arrange oil-cups S, of the construction shown in Fig. 11, at the back and the front of the rollers D D. In Fig. 10 the front cup is removed from its spindle.

As shown, an oil-cup consists of a disk with an annular recess in its upper side to carry the lubricant, a peripheral groove in which is arranged a ring of absorbent material-such as felt, hemp, &c.-and channels between the recess and the groove through which the. oil can reach the felt. The cups are mounted freely on spindles s,'projecting up through slots in the table from slides having a yielding pressure toward the rollers by means of springs S, encircling horizontal guide-bars S extending from such slides through apertures in the sides of the table A.

I have shown in Figs. 1, 2, and 3 a convenient manner of preparing coils for shipment, Fig. 3 showing the arrangement for separate winding, although I do not wish to claim the same herein, as it forms part of the subjectmatter of my said other application, Serial No. 340,952. The coils for shipment being usually required in moderate lengths are obtained from the larger coils in store, and as the chains are usually ordered in specific lengths of, say, thirty, forty, or such a number of links, it is desirable to have a convenient system of measuring, which I have also shown and will describe, but also do not wish to claim herein for the same reasons as given above. The length of the tableA is increased and a horizontal spindle T is arranged to project at a convenient height across the table from a support at the rear thereof, and upon this spindle one or more of the larger coils to be divided up into smaller ones are placed.

15 t are pins arranged at the end of the table, and the operator takes the outer end link of each large coil and unwinds till he is enabled to fit the link over one of the pins. Starting from this link he can count back toward the coil, and when the required number is reached mark the table and thereby save further trouble should a quantity of chains of that particular length be required. Having disconnected the length required, it now remains to rewind it as compactly as possible for shipment, and to do so an end link is inserted in the slit in the winding-key and the roller X transferred to the spindle U, which projects up through slot u in table A from a slide U, having hearings in guideways on the under side of the table. The function of this roller, in connection with such slide, is to furnish a yielding pressure upon the coil while being.

wound, and in Fig-5 I have shown, and will nowdescribe, though not wishing to claim herein, for the same reasons as given above, a means of effecting such yielding pressure and of' regulating the extent of its application.

U are what may be termed whiffletrees or frame's,(shown in frontelevation and section in Figs. 12 and 13,) to which and to the slide U are connected the ends of strong retractile springs U". These frames are pivotally connected by screws to with nuts U", arranged to travel on adj usting-screws U carried in suitable bearings and provided with crank-handles U. hen a chain of very small length is to be wound, the roller X will of course need to be brought at the start in close proximity to the winding-key, and when a longer one it will be moved farther away. There is no other connection between the whiffletrees movable by the adjusting-screws and the slide than the springs U"; but their retractile force is such as to condense their coiling to a stabilitysufficiently rigid to impel the slide and roller in a direction from the key when desired without collapsingin thesmallest degree. It will now be seen that when the roller X is properly located the machine is started and the chain woundaround the key, as in the operation first described, receiving at the same the pressure of the roller, which increases as the ends approach. As each coil is finished its outer end is secured in the usual way and it is then ready for shipment.

Instead of a roller, as at X, a shoe fixed on the spindle might be used as the friction de vice.

hat I claim is as follows:

1. The winding key or spindle having a slit or recess for retaining the end link of a chain to be wound thereon, and sides configurated to suit the shape of the center of the coil.

2. The combination, with a table and a key or spindle adapted to act as the core of a chain wound thereon, of a yielding roller or shoe bearing against the coil and imparting friction thereto as the coil is being wound while issuing from mechanism for n'ieasuring the test. strain of such chain, and means for effecting such yielding pressure.

In a machine for treating drive-chains, the combination, with a table, of a series of friction-rollers mounted vertically thereon and having their spindles passing through said table, whereby the chain may pass between said rollers edge upward, for the purpose described.

4. In a machine for treating drive-chains, the comliiination, with means for retaining the chain until the limit of test strain has been put on, of a series of rollers through which the chain is threaded, one or more of which are adapted to yield with the strain, and means in connection therewith for releasing the chain from the retaining devices.

5. In a machine for treating drive-chains, the combination, with a table on which the chain rests edge upward, and pulling mechanism, of a series of friction-rollers mounted vertically thereon and having their spindles passing through said table, and a lever pivoted to and slides adjustable in such table, to which lever and slides such spindles are alternately connected, for the purposes described.

6. In a machine for treating drive-chains, the combination, with a table on which the chain rests edge upward, and with mechanism for detern'iining the test strain, of a tie vice for winding the chain into a coil during its issuance from such testing mechanism, different portions of such chain being at the same time respectively tested and wound.

7. The combination, with a pair of shoes adapted to grip the chain until the limit of strain has been put on, of one or more series of rollers through which the chain is threaded and adapted to limber the same, and devices for applying a regulated test strain to said chain while the operation of limbering is proceeding.

8. The combination, with a series of rollers through which the chain is threaded for limbering the same, of devices for applying a regulated test strain and a key or spindle upon which the chain is wound as it comes direct from such limbering and testing devices, substantially as described.

9. In a machine for treating drive-chains, the combination, with a device for retaining the chain at one time and offering a yielding resistance or friction thereto at another, and with means for effecting a pull on the chain, of two graduated weighted scale-beams and two levers adapted to operate together in such manner that the movcmentot one lever actnates the other, so that the chain is released from the retaining device and a specified teststrain put thereupon.

10. In a machine for treating drive-chains, the combination, with a device for retaining the chain at one time and offering a yielding resistance or friction thereto at another, and with means for effecting a pull. on the chain, of a series of rollers adapted to assist such device in offering a yielding resistance to the chain.

11. The combination, with the table A and the sprocketavheel G, of the adj ustahle guideplate G acting to prevent the chain adhering to such wheel beyond a desired distance, and means for securing said plate in position, as shown and described.

1;. In a testing-machine, the combination, with pulling mechanism, of the doubleended scale-beam O, with weights attached to both ends, and means for hearing the weight at one end-while allowing its drop or gravity to act upon the end of the beam, as and for the purposes set forth.

1 .3. In a testingmachine having pulling mechanism, the combination, with a table and scale-beam O, with weights attached to both ends,ot sheave O, hung from said table, and a cord passing over said sheave and serving to attach one of said weights to said beam, as shown and described.

it. In a machine for treating drive-chains, friction-rollers mounted vertically on a table and having two grooved peripheral recesses at their lower ends, for the purpose set forth.

15. The combination, with table A and scalebeam 0, suitably pivoted, and having weights connected with each end, of lever E, chain N, and sheave N, as and for the purpose set forth.

16. The combination, with table A, lever E, and means for operating same, of lever K, having sliding weight, slide 1), and pin 7.1, as and for the purpose set forth.

17. In a machine for treating drivcchains, the combination, with a suitable support and means for offering a yielding resistance to the passage of the chain, of a double-armed scalebeam with one arm graduated and carrying a sliding weight to secure pressure and the other adapted to exert such pressure.

Oshawa, Ontario, October 10, 1850.

JAMES DOUGLAS S'lORlE.

In presence of- II. Y. CARSWELL, 1*. W. (Iowanv

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