US2044709A - Multiple spindle drill - Google Patents

Description

June 16, 1936.

' H. I. LEWISET4AL' MULTIPLE SPINDLE DRILL Filed Aug. 51, 1933 5 Sheets-Sheet 1 757 2 Wveuroes; F" Ahmev is was Rusk/ex 52v 75M) Z Wwgd June 1 1936- H. I. LEWIS ET AL MULTIPLE SPINDLE DRILL 5 Sheets-Sheet 2 Filed Aug. 31, 1933 Amara/mks.- WARP) A law/s F3? yeozo saeemxm 5 A r we've Y5 June 16, 1936. 7H. LEWIS El AL MULTIPLE SPINDLE DRILL 5 Sheets-Sheet 3 Filegl Aug. 51, 1933 Q Wm ANA-"ra s DERMK warm Arraeuevs June 16, 1936. H. l. LEWIS ET AL. L 2,044,709

MULTIPLE SPINDLE DRILL Filed Au 51,

1953 5 Sheets-Sheet 4 llllll l l I l l I I l l I I ll mm w p a: 5 4w N In E Y m em r 5 A F n 16,193 H. I. LEWIS ml. 2,044,109

MULTIPLE SPINDLE DRILL Filed Aug. $1, 1953 V 5 Sheets-Sheet 5 Patented June 16, 1936 PATENT OFFICE MULTIPLE SPINDLE DRILL Harry I. Lewis and Frederick'W. Seybold, Dayton, Ohio, assignors to Harris Seybold Potter Company, Cleveland, Ohio, a corporation of Delaware Application August 31, 1933, Serial No. 687,586

23 Claims.

This invention relates to improvements in multiple spindle drills, particularly drilling machines for making perforations in paper sheets,

such for instance as are employed as fillers in loose leaf books.

One of the objects of the invention is the provision of means for drilling a series of holes in a stack of paper sheets quickly and accurately.

Another object is the provision of means for disposing of the cuttings of a series of hollow drills in a simple and efiective way, which means shall be unaffected by adjustment of the drill heads transversely of the machine for the purpose of regulating the spacing of the perforations.

Another object is the provision of control mechanism which in addition to providing automatic stopping at the end of the return stroke, permits automatic stopping at the end of the work stroke, that is at the point of greatest penetration of the drills, in order to facilitate depth adjustment of the individual drills.

Another object is the provision of means for varying the high point position of a rising and falling work table, for the purpose of providing depth adjustment of all drills simultaneously whereby sets of drills of different lengths may be employed.

Another object is the provision of a novel press er foot for gripping the work adjacent the point of application of the drill.

A further object is the provision of means for permitting the gauging of sheets close to the line of centers of the drills.

Still another object is the provision of effective means for lubricating the drill.

Other objects and features of novelty will appear as we proceed with the description of that embodiment of the invention which, for. the purposes of the present application, be have illustrated'in the accompanying drawings, in which Figure 1 is a front elevational view of the complete machine, certain parts being broken away and others shown in section in order to more fully illustrate the invention.

.Fig. 2 is a side elevational view.

Fig. 3 is anelevational view, partly in transverse vertical section and on a larger scale, of the table raising and lowering mechanism.

Fig. i is a side elevational view of the same, also partly in vertical section. a

Fig. 5 is a detail sectional view taken substantially on the line 5-5 of Fig. 1, and showing one of the drill heads in elevation on a larger scale.

Fig. 6 is a sectional view taken substantially stroke.

on the line 6-6 of Fig. 5 showing the drill spindle and accompanying parts.

Fig. 7 is a horizontal sectional detail view of aportion of a spindle, the view being taken substantially on the line 'l'i of Fig. 5.

Fig. 8 is a detail horizontal sectional View taken substantially on the line 8 of Fig. 5.

Fig. 9 is a horizontal sectional detail View taken substantially on the line 99 of Fig. 4.

Fig. 10 is an elevational detail view of the sliding jaw clutch member.

Figs. lland 12 are elevational detail views of two levers which may be employed in connection with the invention.

Fig. 13 is a development of the perimeter of a slotted drum employed in connection with the control for the table movement.

Fig. 14 is a large scale sectional view through the base of the clamping foot and the drill lubricator carried thereby, and

Fig. 15 is a detail elevational view of an eccentrio driving element and other integral parts.

In the embodiment of the invention herein illustrated the hollow drills rotate without axial movement. The table upon which the work is positioned moves up to feed the work to the drills and then down again to permit the finished work to be removed and new work to be placed in position against the back and side gauges. The cuttings travel upwardly through the hollow drills and through passages in the spindles and in the drill heads into a transverse conveyor, in the present instance a screw conveyor, which is carried by the frame of the machine, and with which the head passages are always in communication regardless of the positions of adjust-' ment of the heads. In the present embodiment the table has a fixed length of stroke up and down, but that stroke may be raised or lowered, thereby permitting the use of drills of different lengths. The up and down movement of the table is arranged to be stopped when a clutch is disengaged, and a control for the clutch may be set for automatic disengagement'at the bottom of the table stroke, or for automatic disengagement both at the bottom and at the top of the The stopping of the table in the top position is for the purpose of enabling the operator to set the drills accurately in relation to the wooden drill strip in the table. The control also provides for continuous running, that is without disengagement of the clutch, and for jogging, that is manual control by means of which the clutch may be thrown in or out at will so as to cause movement of the table up or down to any extent desired and to stop the movement at the desired position.

Referring now more particularly to the drawings, the frame or body of the machine is indicated by the reference numeral l5. In the body of the machine are provided vertical ways l6, within which slides I! are adapted to move up and down. These slides are integral parts of a pedestal l8 upon which is carried the work table 19. The latter is illustrated in its lowermost position.

The upper part of the machine body is U shaped, that is it comprises two hollow vertical side posts 20 and 2|. Connecting the upper ends of these posts and rigidly attached to both of them is a cross rail 22, more or less rectangular in cross section, its cross sectional shape being illustrated in Fig. 5. This rail carries the adjustable drill heads and the conveyor for disposing of the drill cuttings. On its forward side it is provided with a wide dovetail 23, 24, the intermediate portion 25 between the two separated parts of this dovetail being curved rearwardly to accommodate the drill heads and their driving shaft, as will presently appear.

At the ends of the dovetail 23, 24 we mount two brackets 26 having dovetail portions which are formed to fit the dovetail 23, 24, these brackets being secured against movement upon the rail by screws 21 or the like. Each bracket carries a bearing for a shaft 23, through which power is furnished for the rotation of the drill spindles.

In the lower part of the rail 22 there is a conveyor comprising a lengthwise passage 29 which is open on the forward side of the rail throughout the length of the latter. A conveyor screw 38 may be positioned within this passage. A free exit for cuttings is provided between the hollow post 20 and the adjacent end of passage 29, so that the cuttings may drop down through the post onto an inclined surface 3| therein, by means of which the cuttings are directed rearwardly into any convenient receptacle, not shown.

Any desired number of drill heads 32 may be mounted upon the dovetail 23, 24. Each head has a dovetail form to engage the dovetail portion 23 of the rail, and at the top is provided with a wedge block 33 which engages behind the dovetail portion 24. The wedge carries a threaded .post 34 which extends through a perforation in the head and has threadedly mounted thereupon a thumb nut 35. When the head 32 is to be adjusted lengthwise of the rail 22, the thumb nut 35 is loosened, and when the desired adjustment has been made the nut is again tightened, thereby locking the head against movement. The wide dovetail insures accurate positioning of the various heads, as well as of the bearings for the shaft 28, and thereby maintains the shaft and drill heads in accurate position relative to each other.

Each head 32 is partly hollow and accommodates a spiral gear 36, which is free to slide upon the shaft 28 but is held against turning movement with respect thereto by a key 31 mounted in the gear and free to slide within a keyway 38 in the shaft. Plates 39, removably attached to the head, hold the gear 36 in proper position within the head.

In each head there is a vertical spindle 4!! rotatably mounted in ball bearings 4! and 42 and in an oil-less bushing 43. Upon this spindle there is a spiral gear M which meshes with gear 36, and which is slidably keyed to the spindle in order to permit vertical adjustment of the latter. Such vertical adjustment is accomplished by means disclosed in detail in Patent 1,554,060 to J. T. Wright. Briefly, this means consists of a nut 45 mounted upon a threaded portion of the spindle between two split collars 46 and 41, the collar 46 engaging an upper ball thrust bearing 48 and the lower collar 41 engaging a washer 49 which rests upon the lower end of a window 50 in the head. As the nut 45 is rotated in one direction or the other, being held by the collars and by the bearing 38 and washer 59 against vertical movement with respect to the head, it causes the spindle to move up or down in the head. The collars 46 and ti! are caused to rotate with the spindle by means of screws 5| and 52 set into the spindle, the heads of the screws extending into the spaces between the ends of the split collars. The nut 45 is cylindrical on its outer surface, and is provided with one or more vertical slots for the reception of a pin or pins 53 mounted in a knurled ring 54. One or more projections 55 at the lower edge of ring 54 are adapted to extend into sockets 56 in the upper edge of split collar 41'. When an adjustment is to be made the operator raises ring 54 to disengage the projections and sockets 55 and 56 respectively, rotates the ring to impart rotation to the nut to the desired extent, and then permits the ring to descend again, causing the projections 55 to again enter the sockets 56,

whereby the nut is locked against accidental niovement. Quick adjustment of the spindle up or down to accomplish individual adjustment of the drills is thereby provided.

The lower end of each spindle has an enlarged part which extends through the bushing 43 and comprises a chuck for the reception of the hollow drill 51. This enlarged portion of the spindle is provided with a passage 58 communicating at the bottom with the bore of the hollow drill and deflected at the top and terminating there at a somewhat reduced portion of the spindle in a mouth 59 which opens into an annular chamber 6% in the head surrounding the spindle. Opposite the mouth 59 the spindle is provided with a wing 6! which sweeps through the chamber 63 and serves to expel any cuttings discharged from the mouth 59 into an inclined passage 62 formed in the head in communication with the chamber 60. The lower end of the passage 62 registers with the conveyor passage 29 in the rail 22. The 4 hollow drill per se forms no part of the present invention but, as an example of a drill which may be employed for the purpose, reference may be had to Dom Patent 1,279,495, issued September the lower part of which may be cylindrical as shown in Fig. 5. The upper portion of the plunger however is a hexagonal rod 65 which has its lower end turned down and threaded to fit within a threaded socket in the upper extremity of the cylindrical part 64. A nut 66 threaded onto the threaded portion of the hexagonal rod 65 may be turned down against the cylindrical portion 54 to lock the two plunger elements in desired relative adjustment. The plunger extends through a cylindrical bore in the head 32 of a size to slidably fit the cylindrical part 64 of the plunger. Around the hexagonal rod within this bore there is a spiral spring 6'! which bears at its lower end against the nut 66 and at its upper end against a plug 68 mounted in the upper-extremity of the bore and-provided with a hexagonal opening which acts as a guide for the hexagonal part 65 of the plunger as it moves up and down. The plug I38 may be held aaginst movement by a set screw 69. The plug 88 prevents the plunger from turning during the operation of the machine, but. if, any slight rotational adjustment of the plunger is. desired it may be secured by loosening the screw 69, after which the plunger may be turned to the desired angle and the screw again tightened. I9 is a collar mounted upon the plunger above the head andheld in any desired position by a set. screw II. This collar 19 acts as an ad- When the stop 19 is adjusted downwardly on the plunger the initial position of the presser foot 63 is raised, and at the same time the initial pressure of the spring 91' is increased, but with a 18 which acts as a drill block.

.given'relative' relation between the parts 64 and 65 of the plunger, and assuming that the spring 81 is always under more or less pressure, then the spring pressure exerted by the presser foot 63 upon the work pile varies directly with the distance between thepresser foot 63 and the head 32, in other words it varies directly with the degree of penetration of the drill into the paper.

stock. The stock therefore is gripped most firmly at the end of the work stroke when the need for gripping is greatest, but in practice the adjustments are such that the paper is also gripped under a considerable pressure at the beginning of the work stroke.

We provide special means for applying lubrication to the exterior surface of the drill in order to facilitate its travel through the paper stock, but the lubricating liquid is of sucha character and it is applied so sparingly as not to cause any discoloration of the paper around the perforation. To this endwe providea fountain brush which comprises a hollow metal container 12 with .a brush tuft T3 at its lower extremity. Thiscontainer is threadably mounted in the foot 63 and has a knurled head I4 by which it may be turned so as to position itself axially at such a point as to cause the brush to engage the side of the drill to such an extent as to feed the proper amount of lubricant onto the rotating surface of the drill. In the upper end of the container'there is a filler plug I5 which is provided with a tapered central opening. A tapered plug I6 fits this opening. When the plug 19 is loosened or removed atmospheric pressure is free 'to assist gravity in producing a flow of lubricant through the brush .13 vonto the drill. When the plug I6 is pushed tightly into its socket, however, air cannot enter the container and the flow of lubricant is interrupted.

In the top of the table I9beneath the line of centers of the drills 5'5 there is a transverse groove 11 which receives a maple or other wooden strip In the upper surface of the table rearward of the strip 18 there is a dovetail groove I9 within which slides a dovetail block 89 constituting part of a backcloseto the edges of the paper stock. In such cases we mount upon the gauge plate 8| a plurality of gauge strips .83 which have upper portions hooked over the plate Ill and which are secured in desired position by set screws 84. These gauge strips are mounted out of alignment with the drill, spindles, and they permit the forma tion of perforations right up to the gauge line. The table is also provided with a side gauge 85, omitted from Fig.1 for the sake of clearness. This gauge may be mounted or adjusted in any desired manner.

. In the forward end of the table I9 there is a depending hanger 86 carrying a split bearing 91 within which is oscillatably mounted a shaft 88.

. A crank handle 89 is pinned to the forward end movement of the connecting rod 92 imparts reciprocation to the table I9, moving in its ways I9. The axis of pivot 9!, however, may be raised or lowered with respect to the table by the manipulation of the handle 89, thereby changing the upper and lower limits of the table stroke without changing the length of the stroke.

The mechanism for reciprocating the table and the control for that mechanism constitute a unit which is separable from the balance of the machine for facility in repair and replacement. This unit is mounted in a box 957which may be secured to the forward transverse part of the frame by bolts 96. A cover 9'! closes the rear of the box. In the top of the box there is an opening 98 through which the connecting rod 92 extends.

On the forward wall of the box 95 there is formed a forwardly and rearwardly extending boss 99 within which is supported a large pin or fixed shaft I99. Upon this pin there is rotatably mounted ,a casting illustrated in Fig. 15, which includes an eccentric Bill, a concentric disc I02 with tapped holes I93 therein, and a drum I94. A pair of eccentric straps I95 and I98embraces the eccentric IIlI. Studs IEI'I secure these eccentric straps togetherand to the lower end of connecting rod 92.

A worm wheel I08 surrounds the forward part of drum I04 and is secured to disc I02 by means of bolts or studs I09 extended through openings in the worm wheel into the tapped holes I93 of the disc. A plate H0 secured to the rear end of pin I09 serves to hold these rotating parts against axial movement.

Worm wheel I98'is driven by-worm III on a shaft H2 which is mounted in ball bearings H3 and I I4 carried by the box 95. Beyond the bearing H4 the shaft H2 is splined to slidably carry a jaw clutch member I I5 which is normally urged toward the left, as viewed in Figs. 1 and 3, by

a coil spring H6 surrounding the shaft and the hub of the clutch member. The jaws of this clutch member are adapted to engage with jaws of a clutch member HI carried upon the end of a shaft H8 aligned with the shaft H2. This shaft H8 is mounted in ball bearings carried in an outwardly extending cylindrical boss H9 on the box 95. Beyond the boss H9 there is keyed to shaft H8 a fiy-wheel I29 which overhangs the .boss H9 to some extent and is'provided with a pair of integral V-pulleys I2I. V-belts I22 run from these pulleys over a pair of small pulleys I23 on the shaft of an electric motor I24, the base I25 of which is hung from a transverse rod I26 about which the base may pivot. Adjusting screws I21 are threaded through the lower end of the base I25 and bear against some fixed part of the machine frame or box 95. By this means the proper tension in the belts may be secured and maintained.

On the outer extremity of'the shaft II8 we mount a sprocket wheel I28 which is connected by means of a chain I29 with a sprocket I30 on one extremity of shaft 28. Driving force from the latter shaft to the conveyor screw 30 is transmitted by a pinion I 3| made integral with sprocket I30 and meshing with a gear I32 on the shaft of conveyor screw 30.

A brake shoe I33 is adapted to engage the periphery of fly-wheel I20 and is pivotally mounted upon the short end of a bell crank lever I34 which is pivoted at I35 in the frame of the machine. At its upper end it carries an operating handle I36 which projects through an opening in the machine frame. This braking means may be employed to stop the fly-wheel promptly after the motor switch has been opened.

The sliding clutch member II may be caused to move away from engagement with the clutch member II1 when a pin I31 on the upper end of a bell crank lever I38 is caused to drop into engagement with a cam groove formed in an enlargement of the clutch member. When this occurs the rotation of the clutch member with its cam face against pin I31 forces the clutch member to the right'against the action of spring I I 6, disconnecting the clutch members'and thereby interrupting the application of driving force to the table moving mechanism. Lever I38 is provided with a perforated hub I39 which is mounted upon a short shaft I40 that has hearing in a side wall of box 95. The lever I38 is secured against rotation upon the shaft by means of a set screw, not shown, threaded into the tapped hole I 4|. On the outer end of shaft I40 there is secured a bell crank lever I42. Pivotally connected at I43 to this lever is a rod I44 which runs through a perforated bracket I45 mounted on the box 95. Below this bracket a coil spring I46 surrounds the rod. This spring abuts against and is adjustably tensioned by a pair of nuts I41 threaded onto the lower end of the rod. The spring tends to rock the shaft I40 in a clockwise direction as viewed in Figs. 2 and 4. In order to rock the shaft I40 in an anti-clockwise direction we attach to the lower end of lever I 42 at I '48 a link I49 which extends through a suitable opening in the box 95 and is pivotally connected at its forward extremity to a crank I50. The latter is pinned to a shaft I5I, and on this shaft there is also secured a pedal I52. When pressure is applied to the latter by the operator's foot, the shaft I40 is turned anti-clockwise against the action of spring I46.

Lever I38 has pivotally mounted thereon at I53 another bell crank lever I54, the lower arm of which bears against a spring pressed plunger I55 slidable in a socket I56 formed in a projecting arm I51 of the lever I38. The upper arm of lever I54 is formed to enter a notch I58 in the periphery of the clutch member I I5. A pin I59 mounted in a socket I60 in lever I38 is adapted to engage the rear side of lever I54 and to retract that lever when the lever I38 is retracted. When the clutch member I 15 is moved out of clutching engagement, and the application of power to the table moving mechanism is thereby interrupted, the mechanism tends to stop, but there might be suflicient fly-wheel effect to rotate clutch member II5 far enough to permit pin I31 to descend again into engagement with the low part of the cam surface on the clutch member, thereby temporarily engaging the clutch members a second time. The lever I54 falling into socket I58 .on the clutch member prevents such an occurrence. It also enables a stopping of the table at an absolutely accurate position, for instance at the very top of its stroke, which is of advantage in setting the drills for depth of out.

In addition to the pedal means for manually withdrawing the clutch pin I31, we provide automatic means which will now be described. I6I is an oscillatable shaft which may be moved longitudinally. It has four different longitudinal positions, determined by a spring detent I62 adapted to take into any one of four different annular grooves in the shaft. The shaft extends out through an opening I63 in the forward wall of the machine frame and on its outer extremity carries a knob I64 to the rear face of which is secured a sector shaped plate I65. This plate serves as a pointer which is used in conjunction with a plate I66 (Fig. 9) on the top of a bracket I61 to indicate to the operator the longitudinal setting of the shaft I6I.

A crank arm IE8 is pinned to shaft IBI. On it is pivoted at I69 a blade I which has a notch in its lower edge to receive a stop pin III carried by the arm I58. A tension spring I12 tends to hold the forward end of the plate I60 down. This loose mounting of the plate I10 upon the arm I68 prevents jamming and possible breakage of the parts.

On a splined rear portion of shaft I 6I there is .slidably mounted against relative rotation an arm I 13, which at its outer extremity is pivotally connected with a link I14 that extends down to and is pivotaliyconnected with lever I38 at the point I thereof. It will be evident therefore that if the arm I68 is swung clockwise in Fig. 3 the link I14 .will be raised and the shaft I40 will be turned anti-clockwise, thereby withdrawing the clutch pin I31.

In the furthest forward position of shaft I 6I, marked Continuous on the plate I66, the blade I10 rides over the uninterrupted smooth periphery of drum I04, which corresponds with the upper portion of the development shown in Fig. 13. In the second position, marked Stop bottom on plate I66, the blade I10 rides upon the periphery of the drum until it encounters deep slot I16 in thedrum, when the blade enters that slot enabling spring I46 to turn shaft I 40' clockwise and disengage the clutch. The slot I16 is so positioned as to stop the table at the bottom of its stroke. In the third position of the shaft, marked Stop'top on plate I 66, the blade I10 can enter shallow slot I11 as well as deep slot I16. These slots being arranged 180 apart, the table stops at the bottom of its stroke and again, after the driving mechanism is released manually, at the top of its stroke, and so on. In the rearmost position of shaft I6I, marked Jog on plate I66, the blade I10 is withdrawn from any contact with drum I04. The spring I46 is accordingly free to throw the pin I31 to clutch disengaging position, and it is held there except during such time as the operator keeps his foot on pedal I52. With this setting therefore it is possible for the operator to move the table to any desired point inits stroke by'merely removing his foot from the pedal I52 when the table reaches such desired point.

The rail 22 with its accompanying parts may be withdrawn rearwardly after bolts I19 extended through openings I 80 in the rail and threaded into tapped openings in the frame have been removed. When this is done the chain I29 is first disconnected. The rear sides of the posts 20 and 2! are open sufficiently to permit the protruding parts of'the shaft 2B'and screw conveyor 30, with their sprockets and gears, to be withdrawn.

Operation.In the drawings two drill heads are illustrated. It is to be understood, however,

that any number within the capacity of the machine may be employed. When the back and side gauges have been set for a given piece of work and the drill heads have been positioned, drills are mounted in the spindles. The operator then swings handle 9!] to loosen split bearing 98, after which he moves handle 89 so as to lower the table with respect to the connecting rod 92. Next, he sets the knob I64 with the plate I65 opposite the notation Stop top. He then starts the motor I26 and the table travelsupwardly to the top of its stroke, and stopsowing to the fact that the blade I'Ill drops into slot IT! in drum I04. The operator now manipulates handles 90 and 89 again to raise the table sufficiently to cause one or more of the drills to engage the wooden strip 18. Owing to the fact that the drills may not all be of identically the same length they may not all touch the strip I8, but the operator next proceeds to make them do so by manipulating the rings 54 of the individual spindles in the manner heretofore described, it being understood, of course, that the motor is stopped while such adjustment is being made.

With the motor running, the operator will then touch the pedal I52 with his foot, thereby withdrawing blade IIB from slot IT! and permitting the clutch members to engage, whereupon the table will descend and the drum I94 will rotate sufiiciently to permit blade I'IB to enter slot I16, when the table will be at the bottom of its stroke. Everything is then in readiness for a regular run of work. The sheets are placed against the gauges, the operator touches the pedal I52, the table rises and feeds the work to the drills, and then recedes again, automatically stopping at the bottom of its stroke. The finished work is then removed and new work put in its place and the operation repeated.

In some cases it may be possible to remove fin- 1 ished work and put new work in its place without extending through said head parallel to said rail,

gearing between said shaft and spindle movable lengthwise of the shaft as the head is moved along the rail, and bearings for the ends of said shaft mounted upon said rail.

2. In a machine of the class described, a rail having a dovetail supporting portion, a drill head mounted upon and adjustable lengthwise of said dovetail supporting portion, a spindle rotatably mounted in said head, a driving shaft parallel to said rail extending through said head, gearing between said shaft and spindle movable lengthwise of the shaft as the head is moved along the supporting rail, and brackets carrying bearings for said shaft, said brackets being mounted upon said dovetail portions at the ends of the rail.

3. In a machine of the class described, a rail, a drill head mounted upon and adjustable lengthwise of said rail, a hollow drill rotatably carried by said head, a driving shaft extending through said head parallel to said rail, gearing between said shaft and said drill movable lengthwise of the shaft as the head is moved along the supporting rail, a conveyor carried by said rail extending lengthwise thereof, and means carried by said head for delivering cuttings from said drill into said conveyor.

4. In a machine of the class described, a rail, a drill head mounted. upon and adjustable lengthwise of said rail, said rail having a lengthwise passage therein open on the side toward said adjustable head, a mechanical conveyor in said passage, a hollow drill rotatably mounted in said head, means for driving said drill, and means for delivering cuttings from said drill into said conveyor passage.

5. In a machine of the class described, a rail, a drill head mounted upon and adjustable length- 1 Wise of said rail, said rail having a lengthwise passage therein open on the side toward said adjustable head, a spindle rotatably mounted in said head, a hollow drill mounted in said spindle, means for rotating said spindle, said head having an annular chamber surrounding the spindle and said spindle having a passage therethrough for receiving cuttings from said drill and delivering them into said annular chamber, and said head having an inclined passage connected with said chamber and registering with the open side of said rail passage.

6. In a machine of the class described, a rail, a drill head mounted upon and adjustable lengthwise of said rail, said rail having a lengthwise passage therein open on the side toward said adjustable head, a spindle rotatably mounted in said head, a hollow drill mounted in said spindle, means for rotating said drill, said head having an annular chamber surrounding the spindle and said spindle having a passage therethrough for receiving cuttings from said drill and delivering them into said annular chamber, said head having an inclined passage connected with said chamber and registering with the open side of said rail passage, and a sweeper blade on said spindle within said annular chamber for forcing cuttings into said inclined passage.

7. In a machine of the class described, a rail, a drill head mounted upon and adjustable lengthwise of said rail, a conveyor carried by said rail extending lengthwise thereof, and means for delivering cuttings from said drill head to said conveyor effective in all positions of the drill head.

8. In a machine of the class described, a rising and falling table, mechanism for causing said table to move up and down through a given stroke of predetermined length, said mechanism comprising a connecting rod, a pivot for one end of said connecting rod, and an eccentric mounting for said pivot by means of which its distance from said table may be varied. I

9. In a machine of the class described, a rotating drill, means for feeding the drill and the work toward each other, and means fixed with respect to the work during thedrilling operation for brushing liquid onto the side of the drill.

102' In a machine of the class described,a rotatingdrill, a presser foot adapted to engage the work adjacent the drill, means for feeding the drill and the work toward each other, and means carried by the presser footafor applying liquid to the side of said drill.

11. In a machine of the class described, a drill, a Work table beneath the-drill, mechanism for producing. relative movement of the drill and table toward and away from each other in a recurring cycle, said mechanism comprising a crank and connecting rod, and control means settable to interrupt the. said movement at the point of greatest separation, or to interrupt'the movement both at the point of greatest separation and at the-point of closest approach.

12. In a machine of the class described, a drill, a work table beneath the drill, mechanism for producing relative movement of the drill and table toward and away from each other, said mechanism comprising a crank and connecting rod, and control means settable to permit'continuous operation of said mechanism, to inter-,-

rupt the said movement at the point. of greatest separation, tointerrupt the movement. both at the point of greatest separation and at the point of closest approach, orto interrupt the movement at any desired point.

13. In a machine of the class described, a pair of' spaced posts, a rail mounted between said.

posts, a drill head adjustably'mounted upon said rail, a spindle in said head, a shaft'removablymounted in the rail extendingthrough said drill head and operatively connectedwith said spindle, one endof said shaft having a drivingelement thereon, and means forremovably securingsaid rail to'said posts.

14.- In a machine of theclass described, apair of' spaced posts, a rail mounted'between said posts, a drill head adjustably mounted upon said rail, a spindle in said head, a shaft removably mounted'in' the rail extendingthrough said drill headandoperatively connected with said spindle; a mechanical conveyor for cuttings-mounted in. said rail, means for operatively connectingsaid shaft and conveyor, a driving element attached to one of said'last named elements, and means for..- removably securing said rail to saidposts.

15. In a machine of-theclassdescribed, a head.

having a vertical-boretherethrough, a.-.plunger extending through said-bore, a:presser foot on the lower end of the plunger, spring .meanswithinthe. head tending to depress said :-plunger, and an adjustable stop on the upper end of the plunger adaptedto engage said-head tofrlimit the-downward movement of.-the plunger.

16; In a machine'of the class described, a head having a vertical bore therethrough, a plunger.-

extending-through said bore, a presser. foot on -the lower end of the plunger, spring means within, the-head tending to depress said plunger, means:

carried by the plunger for varying-the tensionof the spring means, and an adjustable stop on-the upper end ofthe plunger adapted toengage said head to limit the downward movement of the plunger and to permit downward movement thereof to a sufiicient extent to expose said ten- 'sion varying means.

17. In a machine of the-class described, a head having a vertical bore therethrough, a plunger.

extending through said bore; said plunger being formed in two separable parts with the joint therebetween normally positioned within said bore, a'presser foot onthe lower end of the plunger, spring means withinthe head tending to depress said plunger, and an adjustable stop on the upper end of the plunger adapted to engage said head to limit the'downward movement of theplunger and to permit downward movement thereof toan extent sufiicient to expose said joint, wherebyythe plunger may be disassembled and removed from the bore.

18. In a machineof the class described, a head having a vertical bore therethrough, a plunger extending through said bore, the upper-portion of said plunger having a non-circular cross section, a collar having an opening therethrough shaped to slidably fit the non-circular portion of theplunger, said collar having a circular outer surface fitting within said bore and rotatable therein, and means for holding the collar in any one of aiplurality of different angular positions,

. whereby the angular arrangement of the plunger maybe-adjusted.

19.In a machine of the class described, .a rotatingdrilL a presser foot adapted to engage the work; adjacent the drill, means for feeding the drill and-the work toward each other, and a fountain .brush carried by the presser foot in position to'engage the side-of the drill and to brush liquid thereonto.

20. In a machine of the class described, a drill,.a

work table beneath the drill, a crank and connectingrod for producing a cycle of relative movements of the drill and table from a point of greatest separation to a point of closest approach and back again to said point of greatest separation, and control means settable in advance for automaticallyinterrupting said cycle at the point of closest approach.

21. In a machine-of the class described, a drill,

means-for:adjusting the drill longitudinally, a

workrtablebeneath the drill, a crank and connecting rod for producing a cycle of relative movements of the drill and table from a point of greatestwseparation through a stroke of fixed length to a point of closest approach. and back again to said point of greatest separation, and control means settable in advance for automatically,

23.- In a machine of the class described, a drill,-

a work table beneath the-drill, means for verti cally reciprocating one of said elements through a stroke of given length, said means being normallyinterrupted automatically at-the point of greatest separation of said elements only, and

means actuatable during the operation of the ma-- chinefor automatically interrupting the said reciprocation when said movable element next arrives at the point of closest'approach.

HARRY I. LEWIS. FREDERICK .W. SEYBOLD.

Images