US370912A - Ments - Google Patents

Description

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2 Sheets-Sheet 1,

PLANING MACHINE.

Patented Oct. 4, 1887..

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K. WHITE.

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1S. WHITE.

PLANING MACHINE.

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UNITED STATES PATENT OFFICE.

SAMUEL K. WHITE, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO LAMPERT 8t 00., OF SAME PLACE.

PLANlNG-MACHiNE.

SPECIFICATION forming part of Letters Patent No. 370,912, dated October 4, 1887.

Application filed May-22, 1886. Serial No. 202.988. (No model.)

To all whom it may concern:

Be it known that I, SAMUEL K. WHITE, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvementsin Lead-Planing Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being bad to the accompanying drawings, and t0 the letters of reference marked thereon, which form a part of this specification.

The object of this invention is to provide an improved machine for planing or finishing strips of soft metal, such as printers leads; and it consists in the matters hereinafter de scribed, and pointed out in the appended claims.

In the accompanying drawings, illustrating my invention, Figure 1 is a side elevation, partly in central vertical section, of a machine embodying my invention. Fig. 2 is avertical cross seetion of the same, taken upon line x w of Fig. 1. Fig. 3 is a sectional plan view taken upon line 3 3 of Fig. 2. Fig. 4 is a similar sectional view taken upon line 00 a: of Fig. 2. Fig. 5 is an enlarged detail plan view of parts shown in Fig. 1. Fig. 6 illustrates a form of device for actuating the reciprocating bed or table of the machine, as hereinafter described.

In the said drawings, A indicates the main frame of the machine, said frame being sustained upon legs or standards a in the usual manner; and B, alongitudinally-reciprocating table or carriage having bearings at its side edges in guides A A upon the frame A, and adapted to sustain or support the strips to be operated upon.

0 indicates the knife or cutter, which is made with a horizontal cutting-edge upon its lower end adapted to operate upon the topsn rface of a lead or strip of metal upon the table 13; and D is a vertically-movable block for supporting the cutter, said block being attached The machine illustrated is provided, for the purpose of holding the metal strips to be planed upon the table 13, with a gripping device, which is actuated automatically for clamping and releasing the strips by the action of the devices by which the table is reciprocated. For this purpose motion is transmitted to the table through thernedium of a bar, E, which is located beneath and supported by the table B, and is adapted to slide longitudinally to a limited extent upon the latter, so that there will be a certain amount of lost motion between the bar and the table at each time the direction of motion of the latter is reversed.

The gripping device comprises, essentially, a pivoted jaw or gripper, F, which is constructed to act against an opposing surface upon the table, and is actuated by a lug or projection upon the bar E, which operates to move said jaw at each time the bar is moved relatively to the table at the forward and rearward limit of the movement of the table, as will be hereinafter more fully explained.

The driving devices herein shown as acting upon the bar E for the purpose of giving a reciprocatory movement to the carriage B consist of a rack-bar, G, secured upon the said bar E, and which is made double and adapted for engagement upon both of its sides with a cog-wheel, H, which is mounted in a frame, I, adapted to oscillate upon a horizontal axis parallel with and vertically beneath the rackbar, in such manner as to enable the said cogwheel to engage both sides of the rack-bar and pass around the end of the latter at both limits of its movement, the wheel being held in engagement with the rack by stops 1 upon the sides of the frame A, and caused to move around the rack at its ends by means of curved guide-pieces or yokes J, constructed to engage an anti-friction roller, h, mounted upon the end of the shaft H, to which said wheel H is secured. The said yokes are arranged, as more clearly shown in Fig. 3, to hold a gap or ICO recess, h, in the wheel in engagement with rollers g at each end of the rack, and to cause the central axis of the shaft to describe a semicircular curve about the said rollers g,so as to bring the wheel again in position for engagement with the rack after passing around the end of the latter. The stops I operate to limit the lateral oscillatory movement of the frame I, so as to hold the said wheel H in en- IO gagement with either one side or the other of the rack, as clearly shown in Figs. 2 and 3, the frame I being shown in dotted lines in said Fig. 2 in its position when engaging one side of the rack and in contact with the said stop 1. :5 The stops 1 are, as shown, formed by serewbolts inserted through the sides of the frame, and provided with jam-nuts upon their ends outside of the frame, so that they may be adjusted in position as required for the perfect operation of the parts.

The frame I is pivotally supported concentrically with the main driving-shaft K of the machine, said frame, as herein shown, being for convenience mounted upon the shaft itself,

which latter is sustained in a bearing, A adjacent to the said frame and in a hearing, A, attached to an overhanging bracket, A, bolted to the end of the frame A. The shaft H of the pinion H is preferably actuated by means 0 of a pinion, K, upon the driving-shaft K, which pinion intermeshes with a gear-wheel, H", fixed to the said shaft H at its end adjacent to the shaft K, the frame I being bifurcated at its lower end and provided with two 5 separated bearings, I l", which engage the shaft K at points exterior to the gear-wheels K and H It is entirely obvious from the construction above described that when the shaft K is given 0 a rotative motion the pinion H will be rotated through the medium of the gears K and H, so as to drive the rack G longitudinally in a direction depending upon the side of the rackbar with which the said pinion H is engaged,

and that when the said rack has been carried endwise until the gap h in the pinion engages the end roller thereof the anti-friction roller it upon the pinion-shaft, engaging the guide J, will carry the pinion, together with the frame I, laterally until the pinion engages the opposite side of the rack, when the latter will be moved in a reversed-direction until its opposite end is again reached, when the direction of its motion will be again reversed, as before.

The jaw F, forming part of the gripping device above described, is connected by means of apivot-pin,f, with the carriage B, and is rigidly connected with the lever-arm F, extending rearwardly from the jaw, and adapted to engage the stop or projection e, which is attached to and moved with the sliding bar E, the parts being so arranged that when the said bar is thrust in a direction to carry the carriage toward the cutter the said stop a will lift the lever F, and thereby cause the clamp-jaw F to press against the end of the lead located between it and the carriage-bed, and when the said bar E is moved in the opposite direction, or in such manner as to return said bed into position for the placing of a new st1'ip,the said stop 0 will allow the lever-arm F to fall, and thereby permit the release of the lead which has been operated upon.

The relative movement between the carriage B and the bar E is limited by suitable stops upon said parts, so that the amount of lost motion between them is only sufficient to properly actuate the jaw by the movement of the lug or projection c in the manner above stated. As a preferred construction in the parts above referred to, the bar E is held at its edges in grooves I), formed in the lower surface, by suitable longitudinal flanges, b, upon the lower surface of the carriage B, and the lug c is secured to or formed on aplate,E, secured to the uppersurface of the said bar E, within a recess, B, extending vertically through the carriage B, as more clearly shown in Figs. 1 and 5. The said recess B is made somewhat longer than the plate E, so as' to allow the desired lost motion between the bar E and carriage B, the ends of the said plate E and the end walls of the recess B in this case forming the stops above referred to for limit ing the relative movement of the said bar and carriage. The end walls of the said recess B are desirably provided with cushions I)", of leather or other suitable material, to prevent shock or jar when the parts come in contact with each other, as will occur at the beginning of the return movement of the table, and also at the beginning of the movement of the table in a direction for cutting in case there is no metalstripplaeed beneath thejawsF. Aspring, f, is desirably arranged to hold thelever-arm F downwardly, and thereby insure the opening of the grip-jaw at proper times, said spring, as herein shown, being of leaf form and attached at one end to the top surface of the carriage B, and resting at its free end upon the said lever-arm. The recess B is shown in the drawings as covered by a thin plate, I)", having a central opening for the passage of the end of the lever-arm F, said covering-plate being for the purpose of preventing the access of chips or other foreign material to the said recess. The pivot f of the grip-jaw may be held by any suitably-arranged bearings upon the earriage, said pivot, as herein illustrated, being held at its ends in lugs f", formed upon a circular plate, F,whieh is held in a recessin the top of the carriage by means of serewsf. The plate F is preferably made with a roughened gripping-surface, F in its part opposed to the jaw F, which latter is also preferably roughened upon its working-face to more effectually hold the end of the metal strip or lead which is operated upon by the machine.

The employment of a rack and pinion for actuating the table or carriage of a machine for planing printers leads or other soft-metal strips, although desirable as a means of readily giving a rapid reciprocating motion to the said carriage, has been found objectionable, owing to thevibratory or chattering movement thereby given to the said. carriage, such vibratory movement tending to produce an uneven or wavy surface in the planed lead or strip, and the same result often follows from the use of cog-gearing or other similar device. at any pointin the driving-connections by which the machine is actuated- I have found, however, that by placing a spring or cushion of rubber or other material in the connecting parts. between the carriage or other part sustaining or holding the work and the devices by which the latter is actuated any injurious shaking or. vibratory movement is entirely avoided, and that the knife will make a perfectly clean an smooth cut.

In the machine shown in the drawings, in

which the longitudinal movement of the rack is imparted to the bed through the medium of the projection e and the lever F of the gripper F, a cushion, E for the purpose above cited,

is placed between the plate E, sustaining the elastic instead of a rigid connection between the rack-bar G and the table B, it being entirely obvious that in the machine shown the longitudinal strain by which the table is moved does not come directly upon the table itself, but is transmitted to the latter through the medium of the projection e and the clamp-jaw F, which latter operates'to press the gripping end of the strip against the carriage. It will thus be seen that the carriage itself, in this case, in one sense forms the lower jaw of a grip device,which is moved or drawn directly from the bar E, or, in other words, that the said carriage forms a long or extended lower .jaw to the grip, affording suitable support for the strip to be planed.

The plate E is, as herein shown, held upon the bar E by means of screws or bolts 6', ,insertedthrough the plate E into the bar, said screws or bolts being arranged to hold the plate E from endwise displacement, butin such manner asnot to interfere with the clasticity of the connection afforded between said plate and bar by the said cushion E In the particular construction of the carriage or table B illustrated, the said table is provided with a central raised rib, I), made flat upon its top surface to receive the metal strip or lead to be planed, said rib terminating at its end adjacent to the gripping device upon a level with the gripping-surface F This construction in the table is, however, not essential to the operation of the machine, and is employed merely'to facilitate the removal of,chips from the surface upon which the strips are placed.

The pivoted or swinging block 0', to which the knife is immediately attached, is, as herein showmadapted to rotate at its upper end upon a transverse horizontalpivot, c, which is held at its ends in lugs or projections 0 upon the plate D, and the lower end of the block Gand the cutter, 0, carried thereby are preferably adapted to swing freely forward away from the supporting-block D in the return movement of the carriage after, eachstrip has been planed, the cutter being arranged to fall backwardly into'position for operation as soon as the carriage begins itsmovement toward the knife in amanner common in planing-mav arm, 0', extending laterally and downwardly therefrom and having upon its lower free end a piece or block, 0, of flexible materialsuch as rawhide-adapted to rest upon the top surface-of thebed B at one side of the work, the

saidarm operating to throw the knife forwardly and upwardly in the return or backward movement of the carriage, and to thereby sustain its cutting-edge free from the work dursaid knife.

means of setscrews a passing through a slot,

0, in the arln, whereby the latter is madecapable of adjustment vertically, as may be found ing the backward passage of the latter beneath As herein shown, the said arm 0 .is adjustably connected to the-block Oby. 0 I

desirable in adjusting the position of the cutter, or under other circumstances. The prompt return of the OUtlJGIZtO its working position at the end of the return movement of the carriage is insured by means of a spring, D", secured to a part of the plate D, and resting at its free ends against the lower part of the block 0, the free end of the said spring D being, as shown-arranged to engage a pin, 0 secured in a block, 0 which latter is secured upon the forward face of the block 0 and provided with a passage, through which is inserted the shank of the cutter O, and in which it is held.

by a set-screw, c, as clearly shown in Figs. 1 and 2.

For. the purpose of adjusting-the cuttingedge of the cutter so as to bring it accurately.

ITS

by-turning both screws the plate may be moved and held accurately to and in a desired angular position. .The plate D is held in contactwith the block D by means of aheaded bolt, 6 engaging a slot, d in the plate.

The block D,which, as before stated, is ver tically movable in the support A, is desirably made of dovetailed shape in cross-section and held at its edges between guide-flanges 66* upon the frame A bearing-plates a, being herein shown as placed between the said fiangesa and the side margin ofthe block, which plates A are held in contact with the block bymeans I of set-screws a passing through the flanges a 'to compensate for wear.

whereby the plates may be moved inwardly The said block D is connected with the frame A by means of a vertical adj usting-screw, D whereby the vertical position of the block may be accurately adjusted, said screw D being mounted in a bearing, a, upon the frame A and engaged with a threaded aperture in the upper part of the block D. The said block D is preferably split "ertically in its upper part, as clearly shown in Figs. 1 and 4, and set-screws are inserted through the split parts to enable the latter to be clamped or held firmly in contact with the set-screw, the object of this construction being to enable the screw to be held firmly in engagement with the block, and to thereby prevent lost motion between the parts.

For the purpose of rigidly holding the upper end of the set-screw in its bearing a, and for clamping said screw so as to prevent possibilityof the adj ustmentof the block D being disturbed by the accidental turning of the screw, a hub, D, provided with turning levers or handles, as shown, is placed upon the screwshaft above the bearing (IF, and connected with the shaft by a spline and groove, so as to allow the shaft to move longitudinally through, but not to rotatein, the hub, and upon the screw-threaded end of the screw-shaft above the hub is placed a jam-nut, D similarly provided with levers or handles, so that after the screw has been turned by the hub D, so as to bring the cutter in a desired position vertically, the jam-nut may be screwed down upon the hub D with the effect of clamping the several parts firmly and immovably in position.

An automatic clutch mechanism is herein shown whereby a drivingpulley upon the shaft K may be disconnected therefrom at the termination of each forward and return movement of the carriage, said device being constructed as follows: L is the driving-pulley, mounted to rotate freely upon the shaft K,exterior to the bearing A", said pulley being provided upon its hub with one of the members,l, ofa friction-clutch, the other member, Z,ofsaid clutch being mounted upon a sleeve, L, constructed to slide longitudinally but not to rotate upon the shaft K, and provided with an annular groove, Z which is engaged with the forked end m of a sliding rod, M, having bearings at m and m upon the frame. The said rod M is connected by means of a pitman, M, with the depending arm n of a bell-crank lever, N, pivoted upon the frame A near one side of the latter. The opposite end, a, of said lever N is connected with a rod, 0, extending to a suitable treadle, whereby the rod may be actuated,and is also adapted to engage aspringdetent, P, adapted to hold said arm n of the lever downwardly, and thereby retain the clutch in engagement against the action of a spring, N, arranged between the arm a of the said lever N and an opposing surface upon the frame A, said spring operating to hold the lever N and the sliding bar M in position for the disengagement of the clutch. A spring-dctent, P, pivotall y supported upon the machineframe, is provided with a hooked upper end, 1), adapted to engage and hold the armndownwardly against the action of the spring N, the said detent P being engaged by a spring, P, tending to hold said detent normally in posi tion to engage the arm N,theprojection 19 upon the said detent being so arranged that when the free end of the arm n is raised the said projection will be prevented by contact with the end of the said arm from engagement with the latter. Upon the rear end of the carriage B is located a depending stop or projection, B, (shown in dotted lines in Fig. 1 and in full lines in Fig. 2,) the said stop B being arranged to encounter the detent P and throw it forward out of engagement with the lever N at the moment the carriage reaches the forward or outward limit of its movement.

From the construction above described it is obvious that when the carriage B is in position for the insertion of a metal strip or lead the stop B will be in engagement with the detent P, so as to hold the latter clear from the lever N, as shown in Fig. 1, the said lever at such time being thrown upwardly by the spring N, so as to retain the clutch disengaged. If, now, it is desired to start the machine, the treadle is actuated, so as to depress the rod 0, and to thereby throw the clutch into engagement. As soon as the shaft begins to revolve and the carriage to advance, the detent P will be released from the stop B and allowed to spring forward over the end of the arm n of the lever N, so that when the said lever is released by the operator the detent will retain the said arm and other parts of the clutch mechanism in position for engagement, and they will remain in this position until the carriage has made one complete reciprocation, when upon again reaching the forward limit of its movement the stop B will encounter the detent P, and thereby release the lever N and cause the stoppage of the machine.

The machine herein shown is provided upon the driving-shaft K, adjacent to the hearing A, with a collar, k, and between said collar and the end of the bearing is placed a washer, k, of rawhide or other similar material. Upon the end of the said shaft K adjacent to the bearing 1" of the frame I, which engages said shaft, is also placed a similar collar, it, having between it and the bearing 1 another washer, k, the end of the shaft which extends beyond said collar k" being screw-threaded and provided with a nut, k, whereby the collar and the washer k may be forced against the end of the bearing 1. The action of said nut also tends to move the shaft longitudinally in the bearings A A, and to thereby cause the washer k to press upon the bearin gs A. By this construction a means is provided for giving frictional resistance to the rotation of the shaft K, and the object of such construction is to counteract the momentum of the shaft and other moving parts, and to thereby cause the prompt IIO . stoppage of the said shaft and of the table at the moment the clutch device is thrown out of gear by the action of the stop B against the detent']?, it being entirely obvious that in case 5 the impetus of the revolving parts were sufficientlt-o carry the bar E backward toany considerable extent the gripping-jaw would be closed before the end of the strip or lead could be inserted beneath it.

Itis found in practice that in operating upon opposite sides of a strip of soft metal, if the latter is placed inthe same positionupon the bed or'table B at each operation, and the cutter is thereby caused to bite into the sur- I 5 face of the strip at the same place several times in succession, the strip is liable to be pulled apart or break at such place. To avoid liability of this result a movable stop, f, is preferably provided beneath the jaw F, against which stop the end of the strip is thrust in placing it upon the table, said stop being shifted in position after the severed strips in a batch of strips have been planed upon one'si'de, so that in planing them upon their opposite sides the cutter will strike into the opposite surfacesat points slightly in front of or behind the places at which the first cuts begin. In the particular construction illustrated the said stop f is formedby or upon alever, F*, which is pivoted upon the top of the table B, and is provided with a curved. slot, f and clamp-screwf, whereby the stop may be moved to and held at a desired distance from the end of the jawF.

The table B is herein shown as constructed to rest bygravity in the guides A A, except at the part of said guides adjacent to the cutter-supporting frame A at which point the frame A is provided with upwardly and inwardly extending flanges a", sustaining gibs a in position to bear upon the beveled edges of the table, and thereby hold the latter closely in place upon the guides during the action of the cutter onthe work, set-screws a being desirably provided for setting the gibs a closely up against the bearing-surfaces of the table. It is to be understood, however, that these and other similar details of construction in the machine may be varied in carrying out my invention, as may be found convenient or desirable. c

One of the principal features of improvement in my invention is that involved in the employment of an elastic connection between 55 the driving devices by which the table or carr'iage is actuated and the table or carriage itself. Incase the machine to which this cushion is applied is one in which a grip-jaw for clamping the lead is actuated by a relative movement of the carriage itself and a reciprocating part to which the power for doing it is applied, as is the case in the machine herein shown, a cushion to give the yielding or elastic connection between the said reciprocating part and the carriage will usually be located in the connections between the said recipro-- eating part and that part of the gripping device which is actuated by it. In other cases, however, the cushion may be interposed at other points between a rack and pinion, coggear, or other connecting device liable to give a vibratory motion in the reciprocating table or carriage, and a carriage or table upon which the work is independently secured. A construction of this kind in which a sliding rackbar and pinion is employed is illustrated, for instance, in Fig. 6, in which figure blocks of rubber E are shown as inserted between a sliding rack-bar, G, which is provided with projections or lugs 9, between which lugs and the corresponding lugs, b upon an independent] y sliding carriage, B, the said rubber blocks E are located.

Inasmuch as important advantages are obtained by the novel feature of construction described, comprising an elasticconnection between a driving device and the table orcarriage actuated thereby, said cushion is herein broadly claimed without restricting the particular manner of its application.

I claim as my inVention- 1 1. A planing-machine comprising a recipro eating bed or table and means for actuating the table, embracing an elastic connection between said table and the driving devices, substantially as described.

2. The combination, with a reciprocating bed or table,'of means for actuating the table, comprising a rack-bar having a limited movement longitudinally with relation to the table, and an elastic block or cushion interposed between the rack-bar and table, substantially as described.

3. The combination, with a cutter andare ciprocating bed or table, of a part or bar constructed to reciprocate with the table and movable to a limited extent with relation to the latter, to which part or bar the power for actuating the table is applied, a gripping device upon the table, and alug or projection upon the said movable part or bar constructed to engage and actuate the gripping device, substantially as described.

4. The combination, with a cutter and areciprocating table, of a gripping-jaw pivoted upon the table and provided with a lever-arm, F, a bar, E, having a limited movement longitudinally with relation tothe table and pro-, vided with a lug or projection, e, engaging said lever F, and means applied to the bar E for actuating the table, substantially as described.

5. The combination, with a cutter and a re- 6. The combination, with a cutter and are ciprocating table, of a gripping-jawmounted upon the table and constructed to act against an opposing surface upon the latter, a sliding bar having a limited movement longitudinally with relation to the table and provided with a part or projection engaging and actuating the jaw, a cushion interposed between said bar and projection, and means applied to the said bar for actuating the table, substantially as described.

7. The combination, with a cutter and a reciprocating table, of a gripping-jaw pivoted upon the table and provided with a lever-arm, F, a bar, E, having a limited movement longitudinally with relation to the table, a plate,E, secured to the bar and provided with a lug or projection, c, engaging said lever-arm F, a cushion interposed between the bar E and the plate E, and means applied to the said bar E for actuating the table, substantially as de scribed.

S. The combination, with a cutter and a reciprocating table, of a gripping-jaw mounted upon the table and constructed to act against an opposing surface upon the latter, a sliding bar having limited longitudinal movement relatively to the table, and provided with a part or projection engaging and actuating the jaw, a cushion interposed between said jaw and the projection, a rack formed upon or attached to the said bar, a pinion engaging said rack, and means actuating said pinion for giving a reciprocatory movement to the table, substantially as described.

9. The combination, with a cutter and a reciprocating table provided with a recess, B, near its rear end, of a gripping-jaw pivotally supported upon the table and provided with a lever-arm, F, a sliding bar, E, mounted to slide upon the lower surface of the table and provided with a plate, E, located within the recess B and provided with a projection or lug, e, engaging thelever-arm F, the said plate E being made shorter than the recess to allow a limited relative movement of the bar and table, and means applied to the said bar E for actuating said table, substantially as described.

10. The eombination,with the table B, provided with the recess B, of the gripping-jaw F, pivotally supported upon the table and pro vided with a lever-arm, F, and a sliding bar, E, provided with a plate, E, located within said recess B, and provided with a lug or projection, c, said recess B being provided with cushions 0 substantially as described.

11. The combination, with the table B, of the gripping-jaw F, pivoted upon said table and provided with a lever-arm, F, a sliding or lug actuating said gripping-jaw, a double rack bar secured to said bar E, a pinion adapted for engagement with both sides of said rack-bar, an oscillating frame affording bearings for the pinion, stops limiting the lateral movement of the frame, curved guides at the ends of the rack-bar adapted for engagement with a projection upon the pinion, a drivingshaft mounted in the frame concentrically with the axis of oscillation of the said frame, and gearing connecting said driving-shaft with the pinion, substantially as described.

13'. The combination, with the table B and sliding bar E, of the double rack bar G, attached to said bar E and provided with end rollers, g, a pinion, H, attached to a shaft, H, and adapted for engagement with the said rackbar, said pinion being provided with a gap, h, adapted to engage the rollers r a roller, 7:, upon said shaft H, curved guides J J at the ends of the rack-bar, an oscillating frame, I, affording bearings for said shaft H, a drivingshaft affording pivotal support for the said frame I, gear-wheels upon the driving-shaft and the shaft H, and stops I, for limiting the lateral movement of the said frame I, substantially as described.

14:. The combination, with the table B and a gripping device thereon, of a stop, f, movably secured at the rear of the clamping-sun faces of said gripping device, substantially as described.

15. The combination, with the table B and the pivoted jaw F, of a stop, f", a lever, F, sustaining said step, said lever being pivoted upon the table B and provided with a slot and clamping-screw, substantially as described.

16. The combination, with a reciprocating table, of a cutter, a pivotally-sustained support for said cutter, and an arm attached to the said cutter-support and provided with a flexible end piece or part engaging the surface of the table, whereby the cutter is lifted clear of the work in the return or backward movement of the table, substantially as described.

17. The combination,with the reciprocating carriage or table, of rotary driving devices connected with the carriage or table for actuating the latter, and provided with an automatic clutch mechanism, and a friction device applied to one of said rotating parts for arresting the movements of the latter when the clutch is disengaged, substantially as described.

18. The combination,with the reciprocating table provided with a projection or stop, B, of means for actuating the table, comprising a driving-shaft, K, a driving-pulley mounted upon the shaft and connected with the latter by a clutch, means connected with the clutch for actuating the latter, embracing a lever, N, having a horizontal arm, a, a spring applied to hold the clutch normally disengaged, and a spring-detent, 1?, applied to engage the said arm a for holding the clutch in engagement,

IIO

said stop B upon the table being adapted for engagement with the said detent, substantially as described.

19. The combination, with a reciprocating carriage or table, of apart or bar constructed to reciprocate with the table and movable to a limited extent with relation to the latter, a gripping device upon the table, a lug or projection upon the said movable part or bar c011- structed' to engage and actuate the gripping device, rotary driving-connections acting upon said part or bar for actuating the table and embracing an automatic clutch mechanism, and a friction device applied to one of said rotating parts for arresting the movement of the latter when the clutch is disengaged, sub stantially as described.

20. The combinatiomwith the reciprocating table provided with a projection or stop, B of means for actuating the table, comprising a driving-shaft, K, a driving-pulley mounted upon the shaft and connected with the latter by a clutch, means connected with the clutch for actuating the latter, embracing a lever, N, having a horizontal arm, n, a spring applied to hold the clutch normally disengaged, a spring-detent, P, applied to engage the said arm n, for holding the clutch in engagement and adapted for engagement with the said stop 13*, the said driving-shaft being provided with washers k k, of rawhide or other similar material,located between collars upon the shaft and the bearings of'the latter, and means for adjusting the pressure of said washers upon the bearings, substantially as described.

In testimony that I claim the foregoing as my invention I affix my signature in presence of two witnesses.

SAMUEL K. WHITE. Witnesses:

O. CLARENCE POOLE, V. F. MAYER.

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