US392372A - Nail-setting machine - Google Patents

Description

(No Model.) 3 SheetsSheet 1.

' S. 0. SMITH.

NAIL SETTING MACHINE.

No. 392,372. Patented. Nov; 6, 1888.

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(No Model.) 3 sneetksneet S. 0. SMITH. NAIL SETTING MAGHINE.

Patented Nov. 6, 1888.

N. PETERS, PlwlO-Lilhogmpher, Washingiun, D4 0.

3 Sheets-Sheet 3.

Patented Nov. 6, 1888.

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' S. 0. SMITH. NAIL SETTING MACHINE.

N. PCTERS. WWW! WnHnM D. C-

(No Model.)

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PATENT NAlL-SETTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 392,372, dated November 6,.1888, Application filed April 26, 1888. Serial No. 271,915. (No model.)

To (ZZZ whom it may concern.-

Be it known that I, SAMUEL 0. SMITH, a citizen of the United States, residing at Lowell, in the county of Middlesex and Common.- wealth of Massachusetts, have invented a certain new and useful Improvementin Nail-Setting Machines for Boots or Shoes, of which the following is a specification.

My invention relates to nail-setting machines for boots and shoes; and it consists in certain improvements, hereinafter described and claimed, in the machine described in United States Letters Patent No. 198,590, dated'December 25, 1877. These improvements have for their object to make the machine more positive in its operation and more. certain of feeding the nails constantly in the proper direction; to prevent the nails from being jarred from the single-nail groove of the feed-carrier; to avoid the possibility of any nail turningin the pool and being subsequently discharged by the lifters head first into the flexible conductors, and thus entering the form,

- and thereby to avoid the necessity of subsequently sorting the nails.

In the accompanying drawings, on three sheets, Figure 1. is asideelevation of so much of such a machine provided with my improvements as is necessary to the understanding of thesarne,the frame,cam-roll,fulcrum-shaft, and lifter-cam shaft being in vertical section; Fig.2, aside elevation of parts of two of the nail-carriers near their front ends, a part of one of the flexible conductors in side elevation, a side elevation of one of the lifters, its connecting rod and link, and a cross-section of the oscillating bar to which said bar is connected, a portion of said rod being broken away, also a cross-section of a part of the frame and the cushion, the cover or cap of said cushion which supports said bars, and the adjustable poolcap to vary the length of the pool; Fig. 2, a side-elevation of the front part of areturn-carrier provided with a pool, and of the upper part of a riser, the pool-cap being omitted,

. representing a nail striking its point against nails previously deposited in the pool; Fig. 3, an isometric view of said adjustable pool-cap; Fig. 4, a plan of the same; Fig. 5, a front elevation of the oscillating bar, the connecting rod and link, and the lower part of the lifter, a part of said connecting-rod being broken away; Fig. 6, a plan of the lifter; Fig. 7, a right-side elevation of the same; Fig. 8, a rear elevation of said lifter; Figs. 9 and 10, respect ively, vertical crosssections of said lifter on the linesocmand yg in Fig. 7; Fig. 11, a horizon tical longitudinal section of the nail-receiving box on the line 12 v in Fig. 12; Fig. 16, a verticaltransversesection ofaportion of the head, the slide-holder, the sliding spout, and itsslide through the center of said spout; Fig. 17, a horizontal cross-section of the sliding spout, its slide and holder on the line u '11, in Fig. 16, and in the same plane of the guides and stops which direct theskimmer to its proper position, and a plan of a part of the skimmer in position, parts of the nail-receiving boxes being indicated by dotted lines; Fig. 18, a right-side elevation of the feed-carrier and theroll of the roll-joint; Fig. 19, a plan of a part of thesame,

showing the beveled nail-discharge at the front of the same, a portion of said discharge being broken out and turned ninety degrees to show the inclination of the same; Fig. 20, a rightside elevation of the parts shown in Fig. 19, a part being in central vertical section to show the waste-hole, also showing the means of varying the size of the quarter-turn hole and waste-holeby equal amounts; Fig. 21, a central longitudinal section of parts of the feed carrier and adjustable slide adjacent to the quarterturn hole; Fig. 22, a central longitudinal section of parts of said feed-carrier adjacent to the waste-hole; Fig. 23, a perspective View of a part of the adjustable slide, showing the lug which reaches up into the quarter-turn hole; Fig. 24-, a perspective view of the part of the adjusting-slide provided with the lug which reaches into the waste-holc; Fig. 25, a vertical crosssection on the line 25 25 in Fi 20; Fig. 26, a right-side elevation of one ofthc bunting-levers, of a part of one of the feed-ear- Instead of the means shown in said patent for imparting alongitndinal reciprocating motion to the nail-carriers, the same consisting ofvcrtical spring-standards connected to said earriers and operated in one direction by a corrugated roller the teeth of which press the spring away from the axis of the roller while its own elasticity restores it to position after the teeth have passed above or below the 1101i Zoutal central plane of the roller, I use the means hereinafter described.

A stationary fulcrum-shaft, (i, is supported transversely of the machine upon the frame A below the carriers, and upon said shaft are supported and turn all the three-armed bu nting-levers If, each being provided with an upwardly-projecting arm, II, a downwardly-projecting arm, 7:, having a rounded or nearly circular end, 71*, and with a third downhanging arm, It, the latter connected by means of aspiral spring, I, and screw-eyes it to a crossgirt, a? or a, of the frame A, these buntinglevcrs being arranged with the arms 7/ alternately 011 the front and rear sides of the fulcrum (l, and the office of the springs Ill being to keep the rounded ends it constantly in contact with the cam-roll K. roll K is. immediately below the axis of the fulcrum-shaft (l and in the same horizontal plane with the centers of the rounded ends /r.

a longer time than is consumed by the motion imparted directly by the cam, and if the rear sides, of the cam surfaces are curved, as above described, said bunting-levers will start very slowly and move with constantly-accelerating speed until the front sides of the next cam-surfaces strike the bunting-levers.

The carriers 13 B are all recessed on their under sides at b b to receive the upper ends of the upward]y-projcct-ing arms It of the bunting-lever H, and the rounded ends lfiof said 1c ver H are so arranged that the springs I draw the carriers in the direction of their upward inclination, while the blows of the cams on said circular or rounded ends cause the carrier to move suddenly an equal distance in the direction of their downward inclination,so that the nails placed on said carrier will be caused to move with said carriers when the latter are drawn by the springsI until the motion of the carriers is by the means above described so suddenly reversed that the momentum of the nails is not overcome and the surfaces of the carriers are shifted in the direction of their downward inclination from under the nails, so that in effect the nails continue to move and pass up the inclined surfaces of the carriers.

The feeding of the nails up the inclined surfaces of the carriers will be accomplished more rapidly if the rear sides, 7. of the cam-surfaces are curved, as above described, because the action of the springs I will then cause the carriers to move at first slowly and allow the inertia of the nails to be overcome and with a constautly-acceleratcd speed until the carriers and nails are moving together at their greatest speed, when the motion of the carriers is reversed. In the construction shown and described in said patent the feed motion and the The cam-roll K has a uniform rotation in the direction shown by the arrow and is provided with a series of canrsurfaces, 7:, the front side,

It", of each such cam-surface being nearly radial and the other or rear side, 7., of said cam-sureurving from the side I.",at first gradually and then more rapidly,back ward to the front side, It, of the next cam-surface, so that the front side, 7.1, strikes the rounded ends h" and swings the bunting-levers suddenly on the fulcrumshaft G, one such front side, It, striking down upon the rounded ends of alternate levers,

while the diainetrieally-opposite front sidcJu, strikes upward against the rounded ends of allof the other series of said levers. After the bunting-1evers are thus moved suddenly in opposite directions alternately, as above. described, they return to position by the springs I drawing said rounded ends if against return motion of the carrier are performed in I almost equal times, so that the feed motion of The axis of the camthe nails on the carriers is caused by the blow of the teeth of the corrugated roller against the spring standards therein shown, being of slightly greater solidity and suddenncss than the action of the spring-slandards,which cause the return motion; hence without a very careful adjustment of the springs in that construe tion the carrier will fail to feed the nails. On

, the other hand, in my improvement above dofaccs being considerably longer, and preferably scribed the blow is given in one-third of the time required to return the carrier, and the blow which causes the motion of the nails is a perfectly-solid blow, while the return motion is soft and gradual. The movement of the carrier in practice need he only about a thirtysecond of an inch.

In the drawings (see particularly Figs. 26 and 27) two different joints for connecting the bunting-levers to the carriers are shown in Fig. 26, being more particularly applicable to the feed-carriers, but capable of being applied to the rcturlrcarricrs as well, provided that the return-carriers be made of sufficient depth and that the fulcrum-shaftG and the cam-roll the long sides if of the cam-roll, so that the K be arranged low enough in the machine. bunting-levers in their return motion occupy 1 In each case the upper end of the bunting-1e- IIS would need to be reduced, and the spring ver. enters the carrier,'but, as represented in formed in the under side of said feed-carrier and embracing considerably more than half of the curved surface of said roll, the under side of the roll being provided with a slot, h, having parallel sides, which receive and fit the upper end of said bunting lever, but loosely enough to allow the lever to approach and recede from the center of the roll as the lever turns on the fulcrum-shaft G. The roll-joint shown in Fig. 26 is noiseless in operation and attended with very slight friction and prevents any backlash of the .earrier with reference to the bunting-lever.

In the construction shown in Fig. 27 the upper arm, h, of the bunting-lever His provided with a leaf-spring, h, on the opposite side of said lever from the springs I, which obviates the necessity of a careful fitting of said arms h to the recesses b in the return-carriers.

In my improved construction above described the bunting-levers are used merely-to lessen the wear of the cam-roll, which would only about five-eighths as long as the lower..

If the cam-roll were to be applied to the nailcarrier directly, it would need to be turnedend for end and rotated in the opposite direction, and in order to get the same amount of motion the projection of the cam -surfaces would then be attached directly to the nailearrier. In the construction shown in said patent the nails are by the movement of the feed-carriers carried forward for a distance in a nailgroove having the full width of the carrier for a portion of its length, and there contracting into a narrow or single-nail groove j ust wide enough to allow the nails to pass in a single file to the quarter-turn hole, through which they are discharged singly head first, while the surplus nails ,are conducted by an overflow-groove to an overflowvent, through which said surplus nails escape on the return-carrier; but it has been found in practice that some. of the nails are by the jarring of the machine turned across the singleuail groove and overflow groove (these grooves being side by side and together occupying the full width of the carrier) and pass sidewise over the grooves and over the quarter-turn hole, thus interfering with the turn ing of other nails in said quarter-turn hole,and

fall off from said carrier onto the feed-grooveor into the pool. (The overflow-vent is called in said patent a waste-vent, but operates alike on perfectand imperfect nails and is not to be confounded with the waste-vent hereinafter described.) .To prevent this, I cutaway the top of the feed-carrier on each side of the single-nail groove b close to said grooveat b, so that the topof the feed-carrier at the single-nail groove is too narrow to support a nail across the carrier unless the nail is accurately balanced thereon, so that it is practically impossible that a nail should be carried sidewise over the wholelength of the single-nail groove. Hence any nail which turns sidewise before reaching the single-nail groove will be dis charged at that point from the feed-carrier onto one of the return-carriers, either by sliding down the inclined surface If at the side of the single-nail groove or by falling from the other side of said carrier onto the inclined bottom b of an overflow-vent, b, arranged below the top of each feed-carrier and extending through the same below said single-nail groove from side to side of said feed-carrier, the falling nails being carried by their own gravity down said inclined bottom I) through the feed-carrier and onto the return-carrier.

After passing along the singlenail groove, the nails come to a Waste-vent, b properly so called,the same being a longitudinal vertical hole in the bottom of the nail-groove shorter than the quarter-turn hole, said waste-vent being of such a length that a nail or piece of a nail which is substantially shorter than the standard length of nail will fall through said waste-vent, while anail oftheproperlength will pass safely over said waste-vent, because less than half the weight of any such perfect nail will at any time be over the opening of the waste-ventthat is, more than half the weight of a perfect nail will be behind the waste-vent until the front end of the nail has passed the waste-vent and is supported by the nail-groove beyond, and more than half the weight of a perfect nail will have passed the waste-vent before the rear end of said nail leaves the nailgroove behind said vent. The short nails and pieces of nails discharged by the waste-vent fall upon the floor or into any suitable receptacle. The nails next come to the quarterturn hole b which operates as described in said patent, and is made adjustable in length l of the length of the quarter-turn hole would require an equal diminution or increase of the length of the waste-vent. I therefore extend the slide w, to which is secured the part g,

which forms the bottom of the nail-groove in front of the quarter-turn hole, back to the waste-vent, and secure to said slide a vertical projection, 20, which extends upward into said waste-vent and isprovided with a thin cap, 10 grooved in its upper surface to form a part of the nail groove, said cap extending forward into the nail-groove immediately in front. The waste-vent is made long enough and the projection 10 is so arranged between the slide to and cap w to allow said projection to move in said waste-vent and to shorten or lengthen the opening of the same as the slide is moved to shorten or lengthen the quarter turn hole. lheinclined nail-discharge near the front end of the feed-carrier is secured to said slide 10, substantially as shown and described in said last-named patent, and the slide is secured in position, when properly adjusted, by the means there shown.

To prevent the lateral jarring of the car riers,1 support the legs I) bflwith which the carriers are provided, upon caps a a, which rest upon cushions a a of rubber or other elastic material,(metallie springs would serve the same purpose,) arranged in grooves a a in the tops of the crossgirts a a. This arrangement causes the carriers to work more freely and with less noise than if the carrier rested directly upon the rigid frame which supports the cam-roll and the other moving parts of the machine, and renders the nails less liable to be shaken out of their proper po- U sition on the carriers so as to project over the sides of the nail-grooves.

From the quarter-turn hole Z) to the pool I) the nails advance as described in said first named patent. The nails accumulate in the pool and with their heads toward the front of the machine, (to the left in Fig. 1,) and the nails are lifted one by one by the lifter, the upper surface of which is inclined backward and grooved on its upper surface, as shown in said patent. The lifter shown in said firstnamed patent has parallel straight sides at the top, and the nail, being tapering, does not cover the surface of the top of the lifter at the back part of the same, its groove having parallel sides, so that it is possible for the lifter to pick up at the same time a nail and a sliver (or piece with parallel sides thinner than a nail) or short piece of a nail, which nail and piece being together discharged into thethroat would pass through the flexible conductor into the skimmer, but would become wedged in the die, the holes in which correspond to the holes in the skimmer and the perforations in the heel, so that the punch cannot drive the nails through the die, and the heel remains in the heel-machine instead of being removed therefrom by thepuneh, as it should be, and another heel being subsequently introduced below thedie causesthemachine to be broken a common accidentcausing considerable out lay for repairs and the stoppage of the machine.

lhe lifter 0 shown in the accompanying drawings is beveled off on each side from front to back at c c to leave a nail-groove, 0', just wide enough to receive one nail, all other nails or pieces of nails dropping off from the lifter, so that only one nail or piece of a nail is delivered by each lifter at a time to each flexible conductor E. No great injury is done if the imperfect nail, a sliver, or short piece is delivered into the skimmer and driven into the heel, as this does not preventthe heel from being properly discharged from the heel-machine, and the only harm done is that the heel contains one imperfect nail. In the patent first referred to the lifter isjointed to the upper end of a rod the lower end of which is rigidly secured in the lifter-bar, and the lifter works with considerable friction in the returncarrier and is liable to be cramped against the sides of the slot in which the lifter moves, as the lifter-bar, being secured to a lifterlever, moves in an arc of a circle. Furthermore, no provision is shown for adjusting the height of the lifter to the-top of the throat. To remedy these defects, I make the lifter-rod in two parts, 0 c, jointed to each other at c, and the upper part, 0 is jointed to the lifter at 0", while the lowepart,-c, is rigidly secured in the lifter-bar 0 but is adjustable therein, being held by a set-screw, c, which turns in said bar and thrusts against said rod. The lifter-lever C, to which the lifterbaris secured, is operated by means equivalent to what is shown in said patent, a stud, c", projecting from the rear end of said lifter-lever and enteringa grooved cam, c driven by gearing from the main shaft or CfilillOll shaft.

In the patent first referred to the pool is not adjustable in length and no contrivanee is used to adapt the pool to operate upon nails of different lengths. It is obvious that if the nails are all of the same length and this length is the same as that of the pool,and the nails have all been properly turned in the turning-hole, all the nails in the pool will lie with their heads toward the front of the machine; but when the machine is operated upon shorter nailsthat is, upon nails substantially shorter than the pool-the nails will slide down the inclined bottom of the pool, (said bottom of the same inclination as the top of the lifter,) and, gradually accumulating, will leave in front of them a vacant space within the pool, forming a wall or obstruction, against which the point of a nail subsequently entering the pool may strike, and the position of said lastnamed nail be thereby reversed, the head of the nail falling over backward onto those already in the pool, so that the nail will subsequently be discharged head first into the throat D, and, passing through the flexible conductor E, be discharged into the skimmer point up. A nail driven head first into the heel is of little use in holding the lifts of the heel together, and the punch which drives the nail is sometimes broken by missing or slipping from the point of a reversed nail and being crowded aside by the nail. The nails are prevented from being reversed in the pool by means of the adjustable pool-cap b", which is arranged at the front end of the pool and secured to the return-carrier by a screw, b, which passes up through a vertical longitudinal slot,b, in said return-carrier and enters a threaded hole in said cap, so that by loosening the screw 11 the cap b maybe caused to project to any required distance over the rear end of the pool, so that .own box.

nal slot, t

any nails discharged from the feed-carrier upon said cap will be delivered with the points at the front end of the pool, and if. the nails are shorter than the full length'of the pool the space in front of the accumulated nails will be so covered that the .point of a nail cannot enter it. The adjustable pool-cap, therefore, in effect varies the length of the pool to suit the lengths of any nails that may be used in the machine.

When the nailshave accumulated in the pool as high as the cap, the nails subsequently entering the pool move along past the throats in the manner expressed in said first-named patent. It is necessary that the nails should accumulate in the pool, so that in case the feed is delayed the pool may not be entirely empty. From the pool the nails pass, as above stated,- through the flexible conductors into the head or guide block L, into which the lower ends of the conductors E are soldered or otherwise secured, the head or guide block being merely a form perforated with a row of holes, Z, arranged as the holes in a boot-heel, the nails dropping into these holes and through the head into the skimmer S (shown in Figs. 14, 16, and 17) if the skimmer be properly placed beneath the head.

In the patent first referred to no means are shown for catching the nails as they fall from the head or guide block when the skimmeris not in position, the nails having heretofore vwith the face of the heel, so that if no provisions were made to catch these nails of different sizes in separate receivers they would become mixed in the absence of the skimmer and require to be sorted subsequently. To avoid this difficulty, I arrange below the head a box, M, into which the long nails may drop, and arrange below the holes which discharge the short nails a spout, T, which reaches over another box, M, at the side of the first-named box, so that each size of nails will in the absence of the skimmer be discharged into its As the holes in the head or guide block are purposely made large to allow the Inails to fall readily and quickly through them,

the nails are liable when leaving the head L to shear oif sidewise and fall into the first-named .box unless the upper end of the spout is in close proximityto the under side of said head. For the same reason the skimmer to catch the nails must be close to the head when in use, and the spout must therefore be moved aside when the skimmer is removed. Consequently I provide the spout T with a horizontal shank, t, which enters a hollow stand, t, secured to the bracket Z,which'supports the guide-block L and is provided with a horizontal longitudi- Within this slot 15 is placed a spiral s rin t which is com ressed between the inner end (or left end in Figs. 12 and 17) and a horizontal pin, t*, which passes transversely through said slot 25 into said stand t, so that the spoutT may be moved from the right out from under the head, compressing the spring i and will be restored to position by the expansion of the .spring when the spring is allowed to expand.

The skimmer S shown is of the ordinary construction, being a heel-shaped block provided with nail-perforations s s in the order and arranged with the same intervals as the holes in the guide-block L, and provided also with a suitable handle, 8 with gage'points 8 which engage guide-pins in the heel-machine, and with gates s siwhich close the lower endsof the nail-perforations s 8, being attached to levers ss thrown outward by springs 8 8 arranged between said levers s s and the handle s of the skimmer in such a manner that by pressing these levers toward the handle the gates will be opened and allow the nails to fall from the skimmer into the die of the heel-machine. The gage-points of the skimmer when the skimmer is shoved under the guideblock are directed by the guides onto the stop-pins Z P, (see Fig. 17,) bringing the skimmer to its proper position with the nailperforations of the skimmer under the corresponding nail-holes of the guide-block and shoving the spout away from under the guideblock. As soon as the skimmer is removed, the spout T returns under the head.

I claim as my i nvention 1. The combination of a suitable frame, the longitudinally movable nail carriers supported thereon and each provided with a longitudinal groove in its upper surface to re ceive and guide nails, springs to move said carriers in one direction, and the cam-roll provided with a series of cam-surfaces, each of which has a nearly-radial front portion and afollowing portion curving at first slowlyand then more rapidly backward and inward to the next cam-surface of said roll, whereby the rotation of said cam-roll will allow said car- 'riers to move in one direction with the nails supported on said carriers and Wlll thereafter ported thereon and each provided with a lon gitudinal groove in its upper surface to receive and guide nails, springs to move said carriers in one direction, and the cam-roll provided with a series of I cam-surfaces, each of which has a nearly-radial front portion and a following portion curving at first slowly and then more rapidly backward and inward to the next cam-surface of said roll, whereby the rotation of said cam-roll will allow said carriers to be moved in one direction by said springs,

at first slowly to overcome the inertia of the nails supported on said carriers, then more rapidly, and when said carriers and nailshave attained their greatest speed will suddenly move said carriers an equal distance in the opposite direction from under said nails to give sald nails a substantially continuous movement in said first-named direction, as and for the purpose specified.

3. The combination of the frame, the nailearriers supported thereon and recessed on their under sides, the fiilcrum-shaft, thebuntlug-levers turning on said shaft and provided with downhanging arms having rounded lower ends, a cam-roll, and springs to hold said rounded ends in continual contact with said cam-roll, said cam-roll being provided witha series ot'cznn-surlaces,each ofwhich has a near- ]y-radial front portion and a following portion curving at first slowly and then more rapidly backward and inward to the next cam-surface 01 said roll, whereby the rotation of said camroll will cause said carriers to be drawn, at first slowly, but with constantly increasing speed, in one direction and alternately thrown suddenly in the opposite direction an equal distance, as and for the purpose specified.

4. In a nail-setting machine, the feed-can rier provided in its upper surface with a nailgroove of substantially the width of said carrler for a portion of its length, but gradually contracting into a singlc-n ail groove, or groove onlywide enough to conduct a single nail, said carrier being narrowed oil on each side of said single-nail groove to prevent nails arranged crosswise of said carrier being carried along the same above said single-nail groove, as and for the purpose specified.

.7. The combination ofthe frame, the sliding carriers, and elastic supports arranged upon said frame below said carriers and supporting the same to prevent vibration of saidcarriers and to prevent nails on said carriers being jarred therefrom, as and for thepurpose specitied.

6. The combination ol' the frame provided with cross-girls, elastic cushions supported on said cross-girts, caps arranged upon said cushions, and carriers sliding upon said caps to prevent the vibration of said carriers and to prevent nails on said carriers being jarred therefrom, as and for the purpose specified.

7. The combination of the carrier provided w th a pool for the accumulation of nails, the litter provided with an inclined top and with a groove tapered to receive a single nail, a threat or nailtube extending through said carrier and above the bottom ol said pool, and means, substantially as described, for giving to said lifter avertically-reciprocating motion to discharge one nail only at a time from said pool into said throat, as and for the purpose specified.

S. The combination ol the carrier provided with a pool for the accumulation of nails, the lifter provided with an inclined top and with a tapering groove adapted to receive a single nail, a threat or nailtube extending upward through said carrier and above the bottom of said pool, and means, substantially as described, for giving to said lifter a verticallyreciprocating motion within said pool, said lifter having its side edges beveled oil on top from said groove to prevent said lifter from discharging more than one nail at a time from said pool into said throat, as and for the purpose specified.

9. The combination of the reciprocating lifter-bar,the carriers having slots,the lifters arranged to fit and slidein said slots, the li i'terrods connecting said litters and said lifter-bar, and each formed in two parts jointed to each other, one 01' said parts being jointed to a lifter and the other of said parts being rigidly secured to said lifter-bar to allow said lifters to move freely in said slots, as and for the purpose specified.

10. The combination of the reciprocating liftenbar, the carriers having slots, the lifters arranged to slidcin said slots,and the lifter-rods connecting said litters and said lifter-bar and adjustable vertically in said litterbar, as and for the purpose specified.

1].. The combination of the reciprocating liltenbar, the carriers having slots, the lifters arranged in said slots and fitting and sliding in the same, and the litter-rods connecting said litters and said lifter-bar and each formed in two parts jointed to each other, one of said parts being jointed to a litter and the other of said parts being rigidly secured to said lifterbar, but adjustable vertically therein, as and for the purpose specified.

12. In a nailsetting machine, the combination of the rcturircarrier provided with a pool for the accunmlation of nails, alifter provided with an inclined top having a nailgroove, means,substantially as described, for imparting to said lilter a vertically-reciproeating motion through said carrier within said pool, a threat or nailtube extending through said carrier and rising above the bottom of said pool, and a cap adjustable on said carrier and projecting over said pool to vary the length of said pool to adapt it to operate upon nails of different lengths, as and for the purpose specified.

13. In a nail-setting machine, the combination of the return-carrier provided with a pool for the accumulation of nails, alifterprovided with an inclined top having a nailgroove, means, substantially as described, for imparting to saidliftcra vertically-reciprocating motion through said carrier and within said pool, a. threat or nail-tube extending through said carrier and rising above the bottom of said pool, a cap, and a screw extending through a longitudinalvertical slot with which said carrier is provided and entering said cap to secure said cap on said carrier and to allow of said cap being adjusted on said carrier to vary the length of said pool to adapt it to operate upon nails of different lengths, as and for the purpose specified.

14. The combination of the head or guide block having a curved row of nail-holes adapted to conduct nails of a certain length and a straight row of holes for shorter nails, a box or receptacle arranged below said guide-block to receive the longer nails discharged-therefrom, a separate box or receptacle to receive said shorter nails, and a spout arranged below said straight row of holes and discharging into said last-named receptacle, and

adapted to be moved aside to allow a nailform to be placed under said block, as and for other times to discharge said longer nailsinto one of said nail-receptacles and said shorter nails into the other of said receptacles, as and for the purpose specified.

16. The feed-carrier provided with a nailgroove and with a quarter-turn hole and with a waste vent both arranged in said nai1- groove, and also provided with a slide movable 1n the body of said carrier, said quarterturn hole and said waste-vent being formed partly in said body and partly in said slide, whereby the movement of said slide will simultaneously vary the length of said quarterturn hole and said waste vent by equal amounts, as and for the purpose specified.

17. The combination of the body of the carrier and the slide,said body and said slide having a continuous nail-groove,and a continuous quarter-turn hole formed partly in said body and partly in said slide, said body being provided with a waste-vent arranged in said nailgroove, and said slide being provided with a stud extending upward into said waste-vent and'having at the top of said waste-vent a thin cap grooved continuously with said nailgroove and extending into said nail-groove in front of said stud, whereby the length of said quarter-turn hole and waste-vent may be simultaneously varied by equal amounts by the movement of said slide, as and for the purpose specified.

18. The combination of the carrier, the cylindrical roll provided with a slot having parallel sides and arranged in and fitting a rounded slot formed in said carrier, and extending more than half-way around the curved surface of said roll,and the bunting-leverhaving an arm adapted to enter and fit the slot in said roll,- as and for the purpose specified.

19. The combination of the return-carrier provided with a recess in its under side, the bunting-lever provided with an arm which enters said recess and is loose therein, and a spring interposed between said lever and the side of said recess to obviate thenecessity of carefully fitting said arm and reeess'to each other, as and for the purpose specified.

In witness whereof I have signed this specifieation, in the presence of two attesting witnesses, this 28th day of February, A. D. 1888.

SAMUEL 0. SMITH.

Witnesses:

ALBERT M. MOORE, KIRKLEY HYDE.

Images