US188773A - Improvement in machines for drilling the shanks of rivets - Google Patents

Description

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M. BRAY. MACHINE FUR DRILLING THE SHANKS 0F RIVETS.

No.188,773. Patented March 27,1877.

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MACHINE FOR DRILLING THE SHANKS 0F RIVETS. No.188,773. Patented March 27,1877.

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` M. BRAY. MACHINE FOR DRILLING THE SHANKS 0F RIVETS. No.188,773. Paten ted March 27,1877.

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NAPETERS. PHOTO-LlrHOGHAPHER, WASHINGTQNy D c described INrrEn STATES PATENT' rien.

MELLEN BRAY, OF NEWTON, MASSACHUSETTS.

IMPROVEMENT IN MACHINES` FOR DRILLING THE SHANKS OF RIVETS.

Specification forming part of Letters Patent No. 188,773, dated March 27, 1877; application filed October 2, 1876.

for drilling out vthe body or shank of a rivet after the rivet has been formed by a previous operation, so as to make said shank a thin hollow tube, capable of being clinched upon the material in which it is set by turning the end of said tubular shank over onto the material in the same manner that eyelets are set, and is an improvement upon the invention in Letters Patent No. 166,963, granted to me August 24, 1875.

My invention consist-s, first, in mounting the clamping dies or jaws, which seize and hold the rivet while it is being drilled, upon the supplementary or movable frame which carries the` intermittently rotating carrierwheel, and other rivet separating and feeding devices, and adapting said clamping -jaws to be coupled with the operating-levers for ini-- parting ni'otion thereto, mounted on the main frame when the su)` lementar frame is secured in positionon the main frame, and to be readily disengaged from said .levers by moving said supplementary frame back on the main frame, as will be described.

4My inventionfurther consists inthe use, in combination with an intermittently-rotated carrier-wheel, provided With pockets in its periphery totreceive and carry in succession a series of rivets to 4a position in t'ront ot' the drill, an inclined chute, down which said rivets slide in a single line, with their heads all in one direction, and a reciprocating plunger arranged to move in a suitable channel-way, and feed the rivets successively from the foot of the inclined chute into the pockets of the carrier-wheel ot' a discharge-chute or channelsame pocket a drilled rivet into said discharge channel-way with its head downward.

My invention further consists in forming upon the outer end ot' said discharge-chute or channel-way a broad, shallow, Hat-bottomed tray or receptacle, the upper surface of the bottom of which coincides with the bottoni of the discharge end of the groove in said channel-way, in which the discharged rivets may accumulate until inspected by the operator.

My invention further consists in the use, in combination with an inclined chute, down which the rivets slide in a single line With their heads all in one direction, and a reciprocating plunger arranged to move in a suitable channel-way at right angles to said chute, and feed the rivets successively trom the foot of the inclined chute, ot' a reciprocating wedge, adapted to pass between the lower rivet in the inclined chute and those above it, forcing said lower rivet into the horizontal channelway in front of the reed-plunger, and retaining those above it in their position in the chute till the feed-plunger has passed the end of the inclined chute in its movement toward the carrier-wheel, and then recede to allow the rivets to descend the chute till the lower one rests against the side oi' the feed-plunger.

My invention further consists in the use, in combination with an intermittently-rotating carrier wheel or disk, provided with a series ot' pockets in its periphery, each adapted to receive a rivet and convey it to the drillingtool, a pair ot' clamping-dies, an automatically-operated drill, and a detent-wheel, having formed in its periphery as many notches or detents as there are pockets in the carrierwheel, and mounted upon the shaft of said carvier-wheel, of a reciprocating detenta-rod, arranged in a position radial to the axis ot' the detent-Wheel, and a cam, arranged and adapted to move said detent-rod endwise, and force its end into a notch in the detent-wheel, to correct any inaccuracy in the position ot the carrier-wheel relative to the drill, and lock it in such position till again released by the rotation of said cam after the drill has completed its Work upon the rivet, and been withdrawn therefrom.

My invention further consists in mounting said anti-friction trucks, upon which the cams act to operate the clamping-levers, upon studs set in rectangular boxes or blocks titted to slots made through the ends of the long arms of said levers, and adapted to be adjusted transversely ot' said levers by means of set` screws working in nuts formed in said levers, and bearing against said blocks for the purpose of regulating the pressure of the clamping-jaws upon the rivet, and to compensate for the wear of the parts.

My invention further consists in making each of said rectangular boxes or blocks in two parts, the line of separation being parallel to the upper and lower surfaces of that portion ofthe lever into which they are to be inserted,and each of said parts being provided with a lip or lips, to bear upon the upper and under side of the lever, in combination with a stud to carry the anti-friction truck. provided with a shoulder or collar to bear against the under side of the lower portion of the box, a shank extending' up through both parts ofthe box, and a nut bearing upon the upper portion ot' the box, to bind the two parts together, and both to the lever, by forcing the lips on the two parts of the box hard upon the upper and under surfaces of the lever.

My invention further consists in the combination, with an inclined chute, of a feed-plunger, to take a rivet from the foot of the chute and feed it to the carrier-wheel, a lever, a connecting-rod, and a positive-inotion cam, all

connected together, and cooperating to impart to said plunger a positive endwise mo tion in both directions.

My invention further consists in the use, in combination with an antomatically-operated drill, an intermittently-rotated carrierwheel, and a pair of clamping-jaws for holding the rivet while being drilled, of an elevated oiltank, a suitable discharge-pipe, provided with a cock to regulate the ow of oil, and a funnel to receive the oil from the pipe, and direct it upon the drill.

My invention further consists in the use, in a drilling-machine, provided with an elevated tank to supply oil to the drill, of a receivingtank, placed below the drill, in position to catch the oil and the chips cut bythe drill, and having a bottoni slightly inclined, so that the oil will drain away from the chips; a secondary tank, placed at a lower level, into which the oil drains from the receiving-tank; and a pulnp, adapted to draft from said secondary tank and discharge into the elevated tank, from which it again ows by the action of gravity to lubricaie the drill.

My invention further consists in the use, in combination with an intermittentlyoperated carrier-wheel, provided with a series of pockets in its periphery, each adapted to receive and carry a rivet to the drilling-tool, an in clined chute, and a reciprocating plunger, arranged to niove in a suitable channel-way and feed the rivets successively from the foot of the chute to the pockets in the carrier-wheel, of an automatically-operating stop mechanism nr ""imanniilliiilniiiiilllilililiinuiiiiiiiniiiiiiiniliiiiniiiiiniiiliiiwiiuiiiiniiiiiiiiniiiihuniiiiiniiiiiiiuiiiiinlilmiiniiiiniiiliiniitiiiniiiiiilinnnlnilutlunamwmtt adapted to test every rivet that has passed the drill, and, if it is drilled to the proper l depth. discharge it from the wheel into the discharge-chute or channel-way; but if. for any reason, a rivet should pass the drill and l arrive at the place for discharge without bei ing completely drilled, the same mechanism will canse the stoppage of the machine and sound an alarm, the details of which mechanism will be best understood in connection with i the description ofthe drawings.

My invention further consists in the use, in combination with an intermittently-rotated carrierwheel, provided with a series of pock- .i ets, an inclined chute, down which the rivets slide in a single line, a reciprocating plunger, adapted to feed the rivets in succession from the foot of said inclined chute to the carrierwheel, and a discharge-chute or channel-way in line with the feed plunger, of a pivoted or spring-operated gate, extending across said discharge-chute or channel-way parallel with and close to the side of the carrier-wheel, and adapted to swing to one side to allow the passage of a rivet, and then spring back to its normal po sition to close the side of the pocket in the carrier-wheel, and prevent the solid rivet being' fed into the pocket from being thrown too t'ar.

My invention further consists in the use of a driving pulley mounted loosely upon its shaft so as to revolve freely thereon, and made to engage therewith and impart motion thereto by means of a detent notch cut in one end of its hnb,and a corresponding tooth set 1in or formed upon the shaft, and a spring adapted to move said pulley in the direction of the length of the shaft and cause said tooth and notch to engage, said tooth and notch having their bearing sides made tapering, or at an angle to the axis of motion about which said pulley revolves, so that if, for any reason, the resistance to the rotation of the cam-shaft is increased beyond a given point the drivingpulley will be moved on its shaft, disengaging the tooth from the notch, and said pulley will revolve upon its shaft without imparting motion to the several parts of the machine.

My invention further consists in the use, in combination with a driving-pulley fitted to revolve freely upon its shaft, or to be engaged therewith and impart motionthereto by being moved along said shaft in the direction of its length by the pressure ot' a spring, and adapted to be disengaged again by an increase ot' resistance of a spring-pawl attached to and revolving with the pulley, and a circumferential groove cut in the shaft in such a position that when the driving-pulley is disengaged from its shaft by being moved along said shaft against the tension ot' the spring said pawl will drop into said groove and prevent further engagement of the pulley with the shaft till attended to by the operator.

My invention further consists in combining, with said loosely-attached driving-pulley, a bell, so arranged that when said pulley is revolved upon its shaft said bell will continue to sound an alarm to call the attention ofthe operator to the fact -that something Ais wrong with the machine.

My invention further consists in mounting the drill-spindle in bearings having a mortise made radially through that half toward which the belt which drives the spindle draws, into which is fitted a half box made of a block of Babbitt metal, or other suitable bearing composition, in such a manner that it may be moved radially therein, in combination with a follower-plate resting upon the top or outer end of said half box, and a set-screw adapted to bear upon said follower and force said half boX toward the shaft to take up the wear and keep the drill-spindle in line. i

My invention further consists in the oombination with a drill-spindle mounted in bearings in such a way that it may be rotated and moved endwise therein, and provided with a collar at its rear end, a yoke adapted to bear against the rear end of said spindle, and also embrace said spindle forward of its collar, and provided with one or more guidepins to prevent rotation thereof bythe revolution ofthe drill-spindle of a pathcam adapted Vto impart to said yoke, and through it to the drill-spindle, a positive forward and backward motion, and a stand adapted to support said yoke nearly under the point acted upon by the cam to prevent the downward thrust of the cam from unduly springing said yoke and causing it to bind upon the drill-spind-le.

Figure l of the drawings is a plan of my improved automatic drilling-machine. Fig. 2 is a front side elevation, with a portion of the oil-supply tank shown in section. Fig. 3 is a back side elevation. flfig. 4 is a sectional ele vation ofthe drivingshaft and its appendages. Fig. 5 is a central vertical and longitudinal section. Fig. 6 is an' elevation of the inner end ofthe supplementary or removable frame, and the rivet separating, feeding, and testing devices mounted thereon. Fig. 7 is a transverse section of the supplementary carrierwheel and the shield-stands on line a: m, on Figs. l, 2, 3, 5, and 8. Fig. 8 is a vertical seotion on line y y on Fig. 6. Fig. 9is a section through carrier-wheel shaft onl line z e on Fig. 6, showing supplementary frame and stop mechanism in elevation. Fig. l0 is a detail illustrating the relation-ofthe detent lockingbolt to the cam for voperating it. Fig. ll is an elevation of the cam, cam-lever, and a portion of the connecting-rod for imparting an intermittent rotary motion to the carrier-Wheel. Fig. l2 is a transverse section of the lever for operating the clampinggjaw on line 'v fv, and illustrating the manner of applying and adjusting the cam-truck. Fig. 13 is an end elevation of the drillvspindle yoke, and the stand for supporting the same.

Thesame letters of reference refer to the same parts in all of the drawings.

Ais the main frame of the machine mounted upon suitable legs B, portions only of which are shown.

C is the driving-shaft. operated by a belt, (-not shown,) acting upon the pulley D, and provided with the worm C1, which meshes into and acts upon the worm-wheel E secured to the outer end of the shaft El, which is mounted in the bearings Al A1 on the frame A, and has mounted thereon between said bearings, the disk path-cam F, and the two cylinder pathcams a and al.

G is a drill spindle mounted in bearings A2 A2 of the frame A in such a manner that it may be revolved and moved endwise therein at the same time, and provided with the pulley Gl, by means of which and a belt (not shown) rotary motion is imparted thereto.

H H1 is a yoke made in two parts, connected together by the rods b b, which tit into suitable holes in the bearing A2, one part H of the yoke bearing against the rear end of the spindle G, and the part H1 surrounding the spindle in front of the collar c formed on the rear end of said spindle, in such a manner that, while the spindle may be revolved about its axis at a high rate of speed without imparting any movement to the yoke, any motion imparted to said yoke in the direction of the length of the spindle either forward or backward will cause a corresponding-inotion of the spindle.

The yoke H H1 is provided upon its under side with the tongue or slide 3 fitted to and adapted to reciprocate in the groove 4 formed in the upper side of the stand H2, and carries the cam-truck c1, which lits into the path c2 in the cam F, by means of which a positive endwise motion in both directions is imparted tol the drill-spindle to feed the drill to its work and withdraw it from the rivet when the drilling is completed.

Upon the'forward end ot' the spindle G is screwed a drill-chuck, G2, in which is carried a drill, d, oi'l suitable size, and adjusted to the proper length to drill the rivet to the required depth when the cam F 02 has forced the spindle G to the extreme of its forward motion.

J J are two'levers arranged upon opposite sides of the drillspindle and equidistant therefrom, having formed in their front ends slots to engage with the clamping-jaws g g, and pivoted at l1l to the frame A, the long arms of said levers extending toward the rear of the machine, and having formed therein, directly over the cams a and al, slots ff, in which are litted. so as to be readily adjusted transversely of said levers, the rectangular boxes J1, each made in two parts, provided with lips, and clamped together, so as to cause said lips to bear hard upon the upper and under surface of said levers by means of a binding-bolt, h1, and nut h2, the adjustment of said boxes being effected by means of the screws J2.)2 working in screw-threads formed in the stock of said levers, and connected to said boxes so as to impart thereto a positive motion in both directions.

The binding -bolts h1 also carry the camtrucks h3, which tit into, and are acted upon by, the paths i'ormed in the peripheries of the cylinder-cams c and al, which serve to impart to the levers J J an equal and simultaneous motion in opposite directions.

The shaft El has, secured to the end opposit-e to the Worm-wheel E, and outside of the frame A, the path-cams E2 and E3 and the face-cam F1.

The path -cam Ez engages with and acts upon a truck mounted upon a stud set in the side of the lever F2, which is pivoted to the stand l3 secured to the side of the main frame A, and imparts to said lever an intermittent vibratory motion.

The lever F2 is connected to the three-armed lever K, mounted loosely on the end of the shaft j, by the link or connecting-rod K1, and the lever K is connected by the link K2 to the arm L secured firmly to the end of the rocker-shaft k.

rlhe upper end of the lever K has pivoted thereto the pawl l, which engages with the ratchet-wheel l1 secured firmly to the shaft j, the form of the cam E2 and the arrangement of the levers F2, K, and L, links or rods K1 and K, the pawl l, and ratchet-wheel l' being such that each revolution of the cam-shaft will impart an intermittent rotary motion to the shaft j, and an intermittent vibratory motion to the shaft k.

The shaftj is mounted in bearings in the supplementary frame M, and has secured thereon in the center between the two side frames, and directly in front of the drill d, the carrier wheel or disk m, the outer edge of which is made of a thickness about equal to the diameter ot' the rivet to be drilled, and has cut `through said thin portion a series ot' slots or pockets, n, ot' a shape corresponding to the rivet, as seen in elevation, said pockets being equidistant from each other, and so formed as to receive the rivet with the head toward the axis of the wheel, as shown in Fig. 5.

The shaft j also has secured thereto the wheel or disk N, having formed in its periphery a series of detent-notches, equal in number to the pockets a in the carrierwheel m, and into one ot' which is forced, by the action of the face-cam F1, the V-shaped point or end of the reciprocating rod N l at the completion of each motion of the carrier-wheel m, and serves to correct any irregularity in the motion of the carrierwheel, and to hold itin place till the clamping-jaws have closed upon the rivet, the detentrod bein g forced into the notch by the direct pressure of the cam F1 after the wheel has completed its motion, and withdrawn again before the wheel commences to move again, by the action of the spring N2 and the let-off or fall in the cam F, the rod N1 being made adjustable in length, to compensate for the wear of the parts, by being made in two parts, and a coupling-sleeve, N3, connected thereto by means ot' right and left hand screwthreads.

This method of correcting and locking .the carrier-wheel is a great improvement over the device used in the machine patented by me August 24, 1875, inasmuch as there is less Wear to the parts, less friction to resist the movements ofthe various feeding devices,while a more perfect correction or registration of the carrier-wheel relative to the drill is attainable, from the factthat greater pressure can be brought to bear upon the detent-Wheel to turn it when out of place.

O O' are two stands, placed one upon either side ot' the carrier-Wheel, provided with long hubs, through which the shaft 7' passes, and secured by suitable feet to the cross-tie of the frame M.

The faces of said stands contiguous to the carrier-wheel m are cupped out so as to form a chamber between said two stands, within which the thick portion of the carrier-Wheel may revolve, while at the same time said stands bear against the sides of the thin outer edge of said wheel, around the entire circumference of said wheel, to prevent the rivets being displaced from the pockets, except at the points where the rivet is fed into the wheel and discharged therefrom, and at the point where the clamping-jaws seize the rivet to hold it while being drilled.

These stands O O are provided, on the side facing the drill-spindle, with dovetailed slides to receive the clamping-jaws g g, constructed and adapted to engage with the levers J J and be operated thereby, substantially as described in my previous patent cited above, the difference in the two arrangements being that by mounting the jaws g g on the stands O O', instead of on the die-plate secured to the main frame A, as described in my previous patent, the drill and jaws are made much more easily accessible.

The frame M is fitted to and secured upon the front end of the frame A, substantially as described in the patent referred to above.

P is a bifurcated stand, Q an inclined chute, p a curved shield, R a pivoted chute mounted upon the shaft k, and carrying upon its upper side the hopper S, all constructed, arranged, and operating substantially as described in the patent before referred to.

The rivets slide down the inclined chute Q in a single line, with their heads all downward, till the lower rivet drops into the horizontal channel r in front of the plunger fr', by which it is fed into one of the pockets n in the carrier-wheel m.

The plunger lr is formed upon or securedto the front end of the bar o, fitted to move in a dovetailed slide, formed in the upper surface of the shield-stand O', directly over and parallel with the shaft j, said slide being provided with a gib and set-screws, by means of which the friction of said bar o may be regulated.

Directly under the bar o a circular recess is formed in the shield-stand O', in which is placed a spiral spring, o1, and the followerdisk o2, which is pressed upward by the spring o1, hard against the under side of the bar o, as shown in Fig. 7, for the purpose of increasing the friction on the bar o, so that it will remain in a state of rest at either extreme of its endwise movement, till moved by the direct application of force thereto.

Upon theu'pper side of the slidingbar o is secured a supplementary bar, s, heldin place by the screws s1 passing through oblong slots s2, and screwed into the bar o in such a man ner that the bar s-may` bevmoved upon the bar o a short distance in either direction, without affecting the position of the bar o.

A reciprocating motion is imparted to the bar s, and through it to the bar o, by means of the elbow-lever T, pivoted to the frame A at u, one end of which engages with the pin s3 set in the bar s, and atthe other end is pivoted to one end of the connecting-rod U, the opposite end of which is connected to the movable end of the cam-lever U', to which an intermittent vibratory motion is imparted by the path-cam E3.

V is a light lever, pivoted at t to the bar o, and carrying at the end toward the front side of the machineA the vertical adjustable pin t1, so arranged that when the lbars o and s are moved to the extreme of their backward motion said pin will stand directly over the edge of the carrier-wheel, with its center-line coinciding with the center of a pocket therein, with its point or lower end far enough above the same to clear the longest rivet to be drilled.

To the rear end of the lever V is pivoted the link t2, which is pivoted at its opposite end to the link t3, which is fitted to move up and down between two ears u1 u1, formed 'on the rear end of the bar o, the link t3 being guided in itsupward and downward motions by a fulcrum-pin, u2, projecting from opposite sides thereof into oblong vertical slots us cut through the ears u1, as shown in Figs. 6 and 9. Y

The link t3 extends below the pin u2, and rests upon the movable end of the spring V1, the tension of which tends to hold the pin u2 hard against the upper ends of the slots a3, as shown in Fig. 6.

The rear end of the bar s is connected, by means of the double link fv, o, to the central joint ofthe toggle-links t2 and t3 in such a manner that the first part of the forward motion of said bar will tend to straighten the toggle formed by the links t2 and t3, and if there is no impediment in the way of the free descent of the pin t1 the rear end of the lever V will be raised, causing a corresponding depression of the front end of said lever, the pin t1 entering the ldrilled shank of the rivet, held in the pocket of the carrier-wheel, at which time the rear end of the slots s2 coming in contact with the screws s1, a continuation of the movement of the lever T will cause the bar o, plunger r', and the lever V to be moved endwise toward the front side of the machine, the pin t1 discharging the drilled rivet from the pocket of the carrier-Wheel into the discharge-chute or channel-way V2, extending from the carrier-wheel to the front side' oi`-the frame, in line with the channel- Way r' and the plunger 1"', feeding an undrilled rivet into the same pocket, when the forward motion of the lever V and plunger ceases, and they remain in a state of rest till the carrier-wheel has moved about its axis a distance equal to the distance between two pockets, when the motion of the lever T is reversed, the first effect of which is to move the bar s upon the bar o, bend the toggle-joint, and cause the front end of the lever V to be raised, when the bar o and lever V will be moved back to their starting points.

Wis the lower arm of the shipper-lever, which controls the belt which imparts motion to the counter-shaft, from which the machine is driven, the upper arm of said lever being broken away.

The extreme lower end of the lever W has secured thereto, or formed thereon, a slightlyprojecting tooth, w, which, when the lever W is in position to hold the belt onto the tight pulley on the counter-shaft, (not shown,) engages with the catch w', projecting upward from the spring V1, while the spring W tends to move the shipper-lever W in the direction to ship the belt onto the loose pulley.

Now, if, when the bar s begins to move toward the front of the machine, there should happen to be an undrilled or an imperfectlydrilled rivet in the pocket of the carrierwheel, the pin t1 would be intercepted before completing its downward stroke by coming in contact with the solid metal of the rivet, which, presenting more resistance than the spring V1, the power of the toggle joint would be exerted downward, depressing the spring V1, releasing the shipper lever W from the catch w', when' the tension of the spring W will move the shipper-lever and throw the belt onto the loose pulley of the counter-shaft, st opping the machine, and ringing the bell X, to call the attention of the operator.

The discharge channel-way V2 may discharge into the shallow-tray like extension V3, the bottom of which is on a level with the bottom of the channel-way at its junction therewith, so that the rivets may be discharged into said tray with their tubular ends upward, or said tray may be dispensed with, and the rivets may fall from the end of the channel-way V2 into any suitable receptacle placed beneath said channel-way for the purpose.

The channel-way V2 is provided with a gate, a2, to close the entrance thereto held in position with its side in line with the side of the carrier-wheel to prevent the momentum of the plunger' r1 from throwing the rivet in .front ofit through the pocket of the carrier-wheel, so far as to present an obstruction to the ro- 6 IS'SJ tation of said wheel, said gate swinging about its pivot to allow the drilled rivet to be discharged into the channel-way V2, and thrown into position again by the spring a3 in time to intercept the solid rivet being fed into the pocket.

To the upper side of the shield-stand O is secured by means of the screws b2 b2 passing through slots c c3 the bar Y in such a inanner that it may be moved endwise in a line parallel to the motion of the plunger r', and

'having secured to or formed upon its front end the curved finger d1, having its outer end beveled or wedge shaped, and adapted to move across the upper surface of the inclined chute Q, near its lower end in such a manner as to lorce the lower rivet in said chute into the channel-way r in front of the plunger' r', and retain the other rivets in said chute above said wedge till the plunger r has passed the mouth ot' the chute, said linger d' and bar Y being moved in one direction by the spring d2, and in the opposite direction by the end of the plunger r coming in contact with the finger d1.

Z is an oil-tank placed in an elevated posit-ioii, and provided with a discharge-pipe,e, and cock e1, by means ot' which the oil contained in said tank may tlow to and be discharged into the fumiel e2, by which it is directed to the drill.

Z1 is au oblong tank placed beneath the working parts oi the machine with its bottom slightly inclined toward the rear, and supporting therein the shallow tray Z2, having its bottom raised some distance above the bottom of Z1, and inclined toward the front or hopper end ot' the machine, and a portion of it perforated or made of line wire netting, so that While the pan Z2 will catch and hold the metal chips produced by the drill the oil will flow through its perforated bottom into the receiving-tank Z1, whence it tlows into the secondary receiving-tank Z3 placed at a lower level than Z1.

A1 is an oil-pump, the piston of which is operated by the connecting-rml f1 and crankpinjz set in the disk f2, secured upon the end ofthe driving-shaftU, said pump beingadapted t0 draw oil from the tank Z, and discharge it through the pipe f4 into the elevated tank Z.

B1 is a lever pivoted to one side ot' the frame A, and carrying the tappet-rod g1 adapted to strike the inclined chute Q, when said lever is vibrated to iar said chute and insure the descent of the rivets.

Motion is imparted to the lever B1 in one direction by the oscillations of the pump connecting-mdf, and in the other direction by the spring g2.

The driving-pulley l) is titted loosely upon the shaft (l, or in such a manner that it may be rotated thereon, and moved along said shaft in the direction of its length, and has formed in one end of its huh the V-shaped radial notch h4, which engages with a correspondingly-shaped projection, h5, on the contiguous side of the collar G1, secured upon the shaft C.

The pulley D is forced toward the collar O1 by the spiral springt', the tension of which may be increased or diminished at will by means of the nut 'i1 and check-nut i2.

The pulley D has attached thereto, so as to revolve with it, a spring-pawl, la', adapted to engage with the circumferential groove 'i3 when the pulley D is moved along the shaft Cfar enough to disengage the projection h5 from the notch h4.

B2 is a spring secured by one end to the stand O2, which supports the rear end of the shaft C. and extending parallel, or nearly so, with the shaft, till its opposite end nearly reaches the web of the pulley D, and has attached thereto the bell D'.

Tlie web of the pulley D has set therein, so as to project therefrom, a pin, 7'2, so arranged relative to the spring B2 that when the pulley D is engaged with the shaft C, so as to revolve therewith, said pin will pass the end of said spring without striking it; but when the pulley D is moved along the shaft to disengage it from the collar G1, the pin j2 will strike the end of the spring B2 at every revolution of the pulley D and ring the bell D.

The object of this arrangement of the driving-pulley is to stop the machine whenever, by the breaking of a drill, the disarrangement ot' a rivet in the carrier-wheel, or other cause, the resistance to the' operations of the machine is increased beyond what the tension of the spring t will counteract. Each of the caps of the boxes A2 has formed therein a vertical mortisc, in which is placed the Babbitt box A3, and followerplate L2. resting thereon and adapted to be adjusted by the set-screw t3, alid having its bearing in the secondary cap Z1, as shown, to compensate for the wear occasioned by the draft of the belt which drives the spindle.

What I claim as new, and desire to secure by Letters Patent of the United States, is as follows:

l. In combination with the supplemeii tary frame M, movable upon the main frame A, the clamping-jaws g g, mounted upon said supplementary frame M, and adapted to engage with the levers J J when the frame M is secured in position, and to be disengaged therefrom when the frame M is moved back, substantially as and for the purposes described.

Z. The combination of the carrier-wheel m, the inclined chute Q, the reciprocating plunger r', and the discharge channel-way V2 extending from the carrier-wheel directly opposite the plunger lr', substantially as described.

3. The discharge channel-way V2, having formed upon its outer end the shallow traylike extension V3, constructed and arranged substantially as described.

4. The combination ofthe inclined chute Q, the reciprocating plunger r', and the reciprocating finger d1, provided with an inclined or wedge-shaped end, all constructed, arranged, and adapted to operate as and for the purposes described.

5. In combination withthe carrier-wheel m, adapted to be intermittently rotated about its axis, and an automatically-operated drill, the detentwheel N, the reciprocating rod N1, provided with a V-shaped point or end, and the cam F1 and spring N2, all arranged and adapted to operate substantially as described.

6. The combination of the clamping-levers J J, having formed in their rear ends rectangular slots extending transversely thereof, the boxes J1 provided with lips and carrying the cam-trucks h?, and the adjusting-screws J2 J2, all arranged and adapted to operate, as and for the purposes described.

7. The box J1, made in two parts, provided with lips, and bound together and to the-lever J by the bolt h1, in combination with the adjusting-screw J2 connected thereto, so .as to impart a positive motion to said box in both directions, substantially as described.

8. The combination of the inclined chute Q, the feed-plunger r', adapted to take a rivet from the foot of the chute and feed it to the carrier-wheel, the lever T, connecting-rod U, cam-lever U', and the path-cam E3, all adapted to impart to said plunger a positive motion in both directions, substantially as described.

9. In combination with an automaticallyoperated drill, an intermittently-rotating carrier-wheel and a pairofclamping-jaws, adapted to seize and hold the rivet while it is beingl drilled, an elevated oil-tank, a suitable discharge-pipe provided with a cock to regulate the iow of oil and a funnel to receive the oil and direct it upon the drill', substantially as described.

10. The combination, ina drilling-machine, of the elevated oil-supply tank Z, the receiving-tank Z1, the secondary tank Z3, and the pump A4, adapted to draft from the secondary tank Z3 and discharge into the supply-tank Z, substantially as described.

11. In combination withan intermittentlyoperated carrier-wheel, provided with a sexies of pockets, each adapted to receive and carry a rivet to the drilling-tool, an inclined chute, and a reciprocating plunger, adapted to feed the rivets successively from the foot -of the chute to the pockets in the carrier-wheel, the lever V, pivoted to the plunger-carrier, and carrying at one end the testing-pin t1, and connected at its other end with a toggle having no fixed fulcrum, and the bar s, movably attached to the plunger-carrier, and connected to the center of the toggle, all arranged and adapted to operate substantially as described.

12. The combination ofthe carrier-Wheel m, inclined chute Q, plunger r', lever V, testingpin t1, a toggle having' no lxed fulcrum, and adapted to impart motion in either of two opposite directions, the reciprocating bar s,

the spring V1, provided with the catch w', and the shipper-lever W, adapted to engage withla the catch w', and be held thereby against the tension of the spring W', substantially as and for the purposes described.

13. In combination with the shipper-lever W, held in position by the spring V1 and catch w', and the spring W', adapted to move the lever W away from the catch w when the spring Vl is depressed, the bell X, flexibly connected to the shipper-lever, substantially as shown and described.

14. The combination of the carrier-Wheel m, the inclined chute Q, the feed-plunger rf, the lever V, provided with the testing-pin t1, the discharge channel-way V2, and the spring-operated gate a2, all arranged and adapted to operate as and for the purposes described.

l5. rEhe combination of the pulley D, provided With the beveled-sided notch h4 in the end of its hub, and mounted loosely upon the shaft G, so that it may he revolved or moved endwise thereon, the collar G1, secured to the shaft G, and having formed upon its radial face, contiguous to the hub of the pulley D, the bevel-sided tooth h5, and the spring i, all arranged and adapted to operate as and for the purposes described.

16. The combination of the pulley D, provided with notch h4, and mounted loosely upon the shaft C, the spring t', the collar G1, provided with the tooth h5 and the circumferential groove i3, and the spring-actuated pawl k', all arranged and adapted to operate as and for the purposes described.

17. In combination with a driving-pulley adapted to be engaged with its shaft by being moved lengthwise of said shaft by the pressure of a spring, and to be disengaged therefrom by an increase of resistance to the revolution of said shaft,l the spring B2, having secured thereto or otherwise connected therewith the bell D', and the pin j2, projecting from and revolving with the pulley D, all arranged and adapted to operate as and for the purposes described.

18. In combination with the rotating and reciprocating drill-spindle G, the Babbitt metal half-boxes A3, fitted to and movable in mor- `tises made through the caps of the spindlebearings, the follower-plates Z2, and the setscrews L2, having their bearings in the secondary caps Z4, substantially as described.

19. The stand H2, provided withthe groove or slide in its upper surface, in combination with the yoke H H1, provided with the tongue tted to and adapted to reciprocate in the groove, substantially as and for the purposes described.

Executed at Boston, Massachusetts, this 29th day of September, 1876.

' MELLEN BRAY.

Witnesses:

N. C. Lot/nahen, E. A. HEMMENWAY.

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