US831697A

US831697A - Drilling-machine.

Info

Publication number: US831697A
Application number: US7710201A
Authority: US
Inventors: Benjaman F Barnes
Original assignee: Individual
Current assignee: Individual
Priority date: 1901-09-30
Filing date: 1901-09-30
Publication date: 1906-09-25
Anticipated expiration: 1923-09-25

Description

No. 831,697. PATENTED SEPT. 25, 1906. B.,-F.IBARNBS.

DRILLING MACHINE.

APPLICATION FILED SBPT.30,1901.

- 3 SHEETS-SHEET 1.

PATENTED SEPT. 25, 1906.

B. P. BARNES.

DRILLING MACHINE.

APPLICATION FILED SEPT. 30, 1901.

3 SHEETS-SHEET 2.

No. 831,697. PATENTED SEPT. 25, 1906. B. F. BARNES.

DRILLING MACHINE.

APPLICATION FILED SBPT.30,1901.

3 SHEETSSHEET 3.

BENJAMAN F. BARNES, OF ROCKFORD, ILLINOIS.-

DRILLING-MACHINE.

Specification of Letters Patent.

Patented Sept. 25, 1906.

Applicationfiled September 30, 1901. Serial No. 77,102.

T ail whom it may concern.-

Be it known that I, BENJAMAN F. BARNES, a citizen of the United States, residing at Rockford, in the county of l/Vinnebago and State of Illinois, have invented certain new and useful Improvements in Drilling-Machines, of which the following is a specification.

One of the objects of this invention is the production of a drillin -machine having a quick-advance and quic -return feed movement of the drill-spindle.

The invention further refers to a means for varying the extent of such quick-advance movement with relation to the slower workfeed movement of the spindle.

The invention further refers to a means for yieldingly connecting either the quick feed or the work feed to the spindle in order to guard against breakage when the quick feed is thrown into action.

The invention further refers to a driving means for the qlpick feed capable of slipping to revent brea age.

further object of the invention is the embodiment in a drilling-machine of the various im rovements more fully hereinafter specifie In the accompanying drawings, Figure 1 is a perspective view of a drilling-machine embodying the features of my invention, showin the drill-spindle partially lowered by a fu l movement of the quick feedJ Fig. 2 is a view similar to the preceding one taken from the opposite side of the machine, but showing the drill-spindle in its elevated or initial position. Fig. 3 is a detail perspective view illustrating a part of the quick-feed mechanism, showing said mechanism in the position assumed after having-lowered the drill-spindle to its work, as in Fig. 1. Fi 4 is a detail erspective view of parts of t e mechanism looking upon that side of the drillingmachine shown in Fig. 1. Fig. 5 is a view, partly in section, taken on the axial center of,

. the transverse shaft for feeding the drillspindle.

Fig. 6 is a vertical section on dotted line a a of Fig. 5. Fig. 7 is a vertical sectional view illustrating the spring-operated detentlunger'for holding the shifting mechanism ifiustrated in Fig. 4 in either of its two positions. toothed sector, the movement of which drives the drill-spindle through its quick advance and return movements. Fig. 9 is a diametric sectional view of the locking-disk,

Fig. 8 is a side elevation of thethe releasing of which permits the movement ofthe quick advance and return feed. Fig. 10 is a face view of said locking-disk. Fig. 1 1 is a fragmentary vertical central section through the drill-spindle, illustrating its connection with the spindle feed mechanism.

In the embodiment herein shown of'my invention I have combined with the usual work-feed of a drilling-machine an automatically-actuated quick advance and return feed for the drill-s indle. The quick feed and the slower wor -feed (where said workfeed is power-driven) are operated conjointly during the first part of the downward movement of the drill-spindle, the work-feed being mer ed in the quick feed; but when the drill reac es its work the quick-feed. movement by previous adjustment terminates and from this point on the spindle is advanced under the action of the work-feed alone. drill emerges through its work the work-feed is automatically disconnected from the drillspindle, and said spindle is raised to its initial osition by the return action of the quick eed. The relative extent of the quick downward movement of the drill-spindle and of its slower movement under the action of the work-feed, also the position that the drillspindle assumes as its initial position, are severally placed by means of certain adjust- As the ments of the mechanism wholly within the control of the operator.

In the construction of the drilling-machine hercinbefore briefly outlined I provide the usual supporting-column 1, having the horizontal bearin s 2, the vertical bearin s 4, formed integr l with said column, the orizontal shaft 3, lyingin said bearings 2, and the vertical drill-spindle 5, supported in the bearings 4, said horizontal shaft and said drill spindle being rotatably connected by means of the bevel-gears 6. The horizontal shaft is also provided with the cone drive-pulley "Z:

over the cone-pulley 8 and said cone-pulley 12. A vertical shaft is rotatably mounted in the bearings 16 and carries at its upper end a worm-wheel. 17, adapted to mesh with the worm 13, fixed to the shaft 10. The lower end of the shaft 15 is provided with a worm 18, fixed thereto, which worm is adapt ed to mesh with the teeth of a worm-wheel 19, loosely mounted upon the transverse spindle feed-shaft 20. A ratchet-wheel 21 lies beside the worm-wheel 19 and is fixed in any suitable manner to the shaft 20. A pawl 22 is mounted upon the side of the worm-wheel 19 by means of the pivot 22*, and the point of said pawl is held by the spring 22! in engagement with the teeth of the ratchet-wheel 21; At its free end the pawl 22 carries a fixed stud 22, having an offset cone-shape head, said head projecting beyond the.ratchetwheel 21 in a direction away from the worm-wheel 19. A collar 23, loosely mounted upon a hub 24', integral with and extending from the supporting-column 1, is provided with a conical forward end adapted to engage the conical head of the stud 22 of the pawl 22 to move said pawl upon its pivot 22' and raise the tooth of said pawl from engagement with the teeth of the ratchet-wheel 21 when said collar 23 is moved toward said ratchet-wheel 21. Outside the worm-wheel 19 the shaft bears a wheel 25, having recesses 25 in its periphery to receive a rod for manually moving the drillspindle. a Y An oscillatory operating-shaft 26 is mounted in the bearings 27, fixed with relation to the supporting-column 1, and carries two segment-gears 28 and 29. The teeth of the gearsegment 28 mesh with teeth 31, formed upon the upper side of the collar 23, from which it will be seen that a movement of the segment 28 will slide the collar 23 longitudinally of the shaft 20. The teeth of the segment 29' mesh with the correspondin teeth of a vertical rack-bar 32, which rac -bar is slidably mounted at its lower end in a suitable guideopening in one of the bearings 27 for the shaft 26 and at its upper end in a similar opening in the bearing 33. The upper end of this rack-bar is provided with a notch 32, adapted to receive the flange of a locking orescapement disk for controlling the" movement of the quick-feed mechanism, to be'hereinafter more fully described.

At its forward end held forward thereinv by means of a coilspring, 37'. A pin 37 limits theforward the operating-shaft 26 carries a hand-lever 34, which hand-lever. is

movement of the lunger 37. When the shaft 26 is oscillate the roller 36 passes the point of the plunger 37, depressing said plunger against the action of its spring 37 The plunger thus acts as a detent to hold the shaft 26 positively in either one of its two oscillatory positions, also by reason of its spring action serving to move the rack-bar 32 so that its notch 32 is thrown out of coincidence with the flanges upon the locking-disk hereinbefore mentioned.

A movable clam ing-stud 38 is adjustably secured to the feec rack of the drill-spindle by means of the screw-threaded rod 38*, which rod passes through'the opening between two-adjaccnt teeth ofthe feed-rack and enters a correspondingly-screwthreaded o ening in the stud 38. This adjustable c amping-stud is adapted to engage the arm 30, fixed on the shaft 26, and the position of the stud 38 upon the rack of the drill-spindle 5 thus determines the point at which'thecollar 23 will be slid upon the hub 24 and the tooth of the pawl 22 withdrawn from the teeth of the ratchet 21. In practice this is necessary when the drill has passed through its work, and the work-feed should be disconnected from the shaft-20 in order that said shaft may be rotated in a contrary direction by the quick feed to return said drill-spindle to iIts initial position.

drill-s ndle will next be described.

ings 40 integral with'the supporting-column 1, and at its rear end said shaft 39 carries a loose pulley 41, having a finished hub 41*. At a point adjacent to the pulley 41 the shaft 39 carries a spider 42, fixed to said shaft, and this spider has two friction-blocks 42, adapted to bear upon diametrically opposite oints in the periphery of the hub 41. The ictional contactbetween these blocks and the hub is regulated and wear taken up b means of the adjusting-screws 42 The pu ley 41 is continuously rotated during the operation ofthe drilling-machine by means of a belt 43, running over said pulley from a pulley on the counter-shaft (not.shown) at the base of the drill. The friction between the pulley 41 and the shaft 39 thus tends at all times to rotate said shaft and will rotate it save when it is locked against movement by.

' end of the shaft 39 is fixed a worm 44, adapted to mesh with the teeth ofthe worm-wheel 46, fixed upon a shaft 4 5, rotatably mounted in the upper part of the supporting-column 1.

- The shaft 45 also carries the lock ng-disk 47,

hereinbefore'referred to, which disk has two concentric flanges 47 and 47 separated at uick advance and return feed for the ITO their ends by the spaces 47 and 47. The notch 32 in the rack-bar 32 is just suflicient in Width to permit the passage of one of the flanges 47 and 47 An oscillatory yoke or connecting-rod 48 is pivotally connected to the face of the worm-wheel 46 by means of the wrist-pin 46 which wrist-pin is, in effect, a crank-arm on the shaft 45. A gear-sector 50 is pivotally mounted, bymeans of the bolt 50, to the supporting-column 1, and the teeth of this sector are ada ted to mesh with those of a pinion 51, carried by the stud 51, and those of the spur-gear 52 (to which ear said pinion isfixed) are adapted to mes with the teeth of a pinion 53, loosely mounted upon the shaft 20. A hub 54 is fixed to the shaft 20 by .means of the nut 54 and has a rotative connection with the pinion 53 by means of the teeth 55, formed in the meeting faces of said hub and said pinion; This \releasable connection between the inion 53 and the shaft 20 is rovided in or er that the may e disconnected and the dull-spindle advanced under the work-feed alone, if dei j as imparted by the reciprocation of the block 49 is governed by the positions of the

screws

57 and 58 with reference to the ends'of the elongated opening 56. If only a slight movement of the sector (and consequently of the drill-spindle) is desired, the screw 58 is withdrawn almost entirely from the opening 56; but if a considerable movement of the sector is necessary said screw is projected farther into said opening. During a downward movement of thedrill-spindle the block 49 bears upon the upper end of the screw 58, and this screw is intended to be adjusted in position in the elongated opening 56, so that the yoke 48 will have moved to its lowermost position, Fig. 3, when the drill reaches a point adjacent to its work. The position of the screw 57 is such that the ear-sector 50 may be oscillated downward y the workfeed (through the gear connection between the shaft 20 and said sector) until the drill emerges through its work. When the drill reaches this-point, the screw 57 may be in contact with the upper side of block 49, or it may be at some distance from said block, de-

pending upon the height to which it is de-,

sirable to raise the drill above its Work in attaining the initial position of the spindle.

quick feed- From the foregoing description it will be seen that the

screws

57 and 58 may be adjusted so that much or little of the vertical movement of the yoke 48 is transmitted to the drill-spindle 5, according to the necessities of the work and the deslres of the operator. It will also be noted that the sector 50 is constantly in gear with the shaft20, so that a sufficient amount of lost motion must be provided for to permit the drillspindle to descend throu h 1ts work after the yoke 48has assumed its owest position. It will also be seen that the work-feed and the quick feed both act conjointly upon the drillspindle during the rapid lowering of said spindle, during which time the quick feed outstrips the work-feed, causing the ratchetwheel 21 to sli under the pawl 22, said awl clicking over t e teeth of the ratchet-w eel. When the drill-spindle reaches its work, the quick feed ceases, the Work-feed alone then advancin the spindle.

' The 0 ject in driving the quick-feed mechanism. independently of the work-feed or the spindle-rotating means is to permit of alwa s operating the quick feed at maximum spec regardless of variations in the speed of t e Work-feed or spindle.

In operation, assuming the parts to be in the gositions indicated b Figs. 2 and 4 of the rawings or in any ot er one of its initial positions that may be selected by the o erator, the piece to be drilled is placed upon t e drilltable and the hand-lever 34 moved by the operator from right to left. This movement of the hand-lever oscillates the shaft 26 and raises the rack-bar 32 so that its notch 32 coincides with the flange 47 of the lockingdisk 47 releasing the disk (together with the worm-wheel 46 and the shaft 39) to the rotative tendency of the constantly-driven fricalso rocking the arm 35 into a position in which the sprin -plunger 37 exerts a tendency to raise sai arm 35 and with it the rack bar 32. The rotation of the shaft 39 drives the Worm-wheel 46, depressing the yoke 48 and oscillating the sector-gear 50. This oscillatory movement of the gear 50 drives the train of

gears

51, 52, and 53 to uickly lower the drill-spindle 5 and to bring t e drill into a position adjacent to the Work. At this oint the oke has reached the limit of its ownward movement, the locking-disk 47 having made half of a revolution, bringing the notch 47 thereof into coincidence with the rackbar 32. When this occurs, the rack-bar is instantly raised by the spring-plunger 37 so that its notch 32f is out of coincidence with the flanges of the locking-disk 47, stopping the rotation of said disk and preventing the o eration of the quick feed. The drill-spind e is now advanced by the work-feed, and when the drill emerges through its work the adjustable clamping-stud 38 upon the rackof the oscillatory shaft 26, whereupon continuing downward movement of the drillspindle oscillates the shaft 26, sliding the collar 23 lengthwise of the hub 24 and causing the conical forward end of said collar to engage with the conical head of the stud 22, carried by the pawl 22. The engagement of the collar 23 with the stud 22 moves the free end of the pawl 22 outward upon its pivot 22 against the tendency of the spring 22 and withdraws the tooth of said pawl 22 from ongagement with theteeth of the ratchet-wheel 21, freeing the shaft 20 from connection with the constantly-rotated worm-wheel 19 of the workfeed.

The oscillatory movement just described of the shaft 26 moved the arm 35 downward into a position where the spring-plunger 37 tends to move said arm still farther downward and also moved downward the rack-bar 32 by reason of the segment-gear (29) connection between said shaft 26 and said rack-bar,

which movement of the rack-bar brought the notch-32 of the rack-bar into coincidence with the flange 47 of the locking-disk 47, thereby releasing said locking-disk (and the shaft-39 and worm-wheel 44) to the rotative tendency of the constantly-driven pulley 41 and permitting a movement -of the quickfeed mechanism to elevate the yoke 48 and sector 51, and thus restore the drill-spindle 5 to its initial position. When the rotation of the locking-disk 47 brings the notch 47 d into coincidence with the rack-bar 32, the springplunger 37 draws said rack-bar downward to bring the notch 32* out of coincidence with the flanges of said disk, stopping the operation of the quick-return feed. The mechanism has now made a complete cycle of its movement and stands at rest, ready for the removal from the drill-table of the work just operated upon and the substitution therefor of a newpiece of work. When such new work is placed upon the drill-table, the handlever 34 is again moved by the operator, and the cycle of movement just described is repeated. Some yielding connection between the feed-shaft and either the work-feed or the nick feed is necessary to permit the change i rom one feed to the other without-the breakage of parts which would result from an un- A gear-drive or other positive connection ger of such breakage is obviated.

It is apparent that the work-feed instead of being ower-driven might be operated by hand an the drill-spindle advanced and returned by the quick feed in the same manner as hereinbefore described. It is further obvious that many other changes and modifications might be made in the quick-feed mechanism without departing from the spirit and scope of my invention; also, that the quickadvance movement of the spindle might be eliminated and the quick-return movement retained, in view of all of which I desire to have it understood that I do not limit myself to the embodiment herein shown of my invention, but claim said invention broadly.

The term slip connection used herein is intended to include the various mechanical appliances for permitting one feed to actuate v the spindle while the other feed is moving at a different rate of speed or is stationary. Such mechanisms include not only pawls and ratchets, friction and toothed clutches, and other friction slipping devices, but also include yielding spring connections arranged to take up motion, and thereby permit a greater rotative movement of one shaft than of the other. Some form of slip connection interposed between one of the feeds and the drill-s indle, or included as an element of one of sai feeds, is highly important, if not absolutely necessary, in the successful operation of mechanism embodying certain important features of this invention, 'wherefore applicant desires not to be limited by the terms chosen to describe said invention.

I claim as my invention 1. In a drilling-machine, in combination, a

drill-spindle; means for advancing said drillspindle under two different feed-speeds during each advance movement of said spindle;

and a slip connection between said spindle and the means for advancing said spindle under the slower feed-speed.

2. Ina drilling-machine, in combination, a drill-spindle; meansfor advancing said'drillspindle under-two different feed-speeds during each advance movement of said spindle; means for varying the extent of the advance movement of the spindle under one of said feed-speeds; and a slip connection between said s indle and the means for advancing the spind e under the slower feed-speed.

3. In a drilling-machine, in combination, a drill-spindle; a work-feed mechanism and a quick advance feed mechanism having a driving connection with said spindle, said workfeed mechanism having a slipping connection between certain of its elements.

4.. In a drilling-machine, in combination, a

work-feed for advancing the spindle; a yielding connection between said spindle and said work-feed and means for varying the extent of the advance movement of the spindle under one of said feeds.

5. In a drilling-machine, in combination, a drill-spindle; means for raising and lowering the splndle; a Work-feed adapted to actuate said raising and lowering means; a quick feed, independent of the work-feed, for actuating said raising and lowering means; a slip connection between said Work-feed and said raising and lowering means; a driving means for actuating said quick feed; and adjustable means for rendering said quick feed inefi'eotive to operatethe raising and lowering means for a portion of the movement'of said quickfeed driving means.

6. In a drilling-machine, in combination, a drill-spindle; a-work-feed for said spindle; a quick advance and return feed for said spindle independent of the work-feed a slip connection between said work-feed and said spindle; means tending to actuate said quick feed; means for holding said nick-return feed from action; and means ior releasing the quick-return feed to action.

7. In a drilling-machine, in combination, a drill-spindle; a work-feed for said spindle; a guick advance and return feed for said spinle independent of the work-feed; a slip connection between saidwork-feed and said spindle; means tending to actuate said quick feed means for holding said quick-return feed from action; means for releasing the quickreturn feed to action; and means for adjustably limiting the'extentof the efficient ac tion of the quick feed to advance the spindle.

8. In a drilling-machine, in combination, a drillspindle; a work-feed and a nick advance and return feed for said spin e; a slip connection between said work-feed and said spindle; means tending to actuate said quick feed; a detent for holding said quick feed from action; and means adapted to be actuated by the work-feed for withdrawing said detent to release the quick-return feed to action. t

9. In a drilling-machine, in combination, a drill-spindle; a work-feed and a nick advance and return feed for said s in e; aslip connection between said work-feed and said spindle; means tending to actuate said quick feed; a detent for holding saidquick feed from action; and means adapted to be actuated by the advance movement of the drillspindle under the work-feed for withdrawing said detent to release the quick-return feed to action.

10. In a drilling-machine, in combination, a' drill-spindle a feed-shaft therefor; a spindle-feed mechanism comprising a wormwheel having a slip COIlIlGCtlOIIWIth said-feedshaft; and a second s indie-feed mechanism operatively connecte with said feed-shaft,

- said spindle-feed mechanisms being arranged to operate at different s eeds.

11 In a drilling-mac 'ne, in combination, a drill-spindle; a feed-shaft for said spindle;

two gears on said feed-shaft, one of said gears having a ratchet connection with said shaft; a work-feed adapted to engage with said lastmentioned gear; a quick-advance feed adapted to mesh with the other one of said gears; and means for varying the extent of the advance movement of-said spindle under the work-feed.

12. In a drilling-machine, in combination, a drill-spindle; a feed-shaft for said s indle; two gears on said feed-shaft, one of sai gears having a ratchet connection with said shaft; a work-feed adapted to engage with said lastmentioned gear; a quick-advance feed adapted to mesh with the other one of said gears; and means for varying the extent of the advance movement of said spindle under the quick feed.

13. In a drilling-machine, in combination, a drill-spindle; a feed-shaft for said spindle; two gears on said feed-shaft, one of said gears having a ratchet connection with said shaft; a work-feed ada ted to engage with said ratchet-gear; an a quick advance feed adapted to mesh with said other gear.

14. In a drilling-machine, in combination,

a drill-spindle; a feed-shaftfor'said spindle;

said ratchet-gear; a quick advance and return feed adapted to mesh with said othergear; and means for breaking said ratchet connection during the rotation of said feedshaft in one direction.

15. In a drilling-machine, in combination, a drill-spindle; a spindle-feed shaft; a gear loosely mounted on {said shaft; aratchetwheel fixed on said shaft; a pawl pivotally mounted on said gear and adapted to engage said ratchet-wheel; means for rotating said gear to rotate the shaft in one direction;

means for rotating said shaft in a contrary direction; and means for withdrawing said pawl from engagement with said ratchetwheel.

16. In a drilling-machine; in combination, a drill-spindle; a spindle-feed shaft; a gear loosely mounted on said shaft; a ratchetwheel fixed on said shaft; a pawl pivotally mounted on said gear and adapted to engage said ratchet-wheel; a stud on said pawl; a collar loosely mounted on said shaft and adapted to engage'said stud to withdraw the 'pawl from engagement with the ratchetwheel; means for rotating said gear to rotate the-shaft in one direction; means for slidin said collar longitudinally of said shaft; and means for rotating said shaft in a contrary direction.

17. In adrilling-machine, in combination,

a drill-spindle; a work-feed for advancing,

the spindle; a quick feed driven independently cf the work-feed for returning the spindle; a driving means capable of slipping for operating said quick feed; means for holding said quick feed from action against the actuative tendency of said driving means; and

means automatically actuated for releasing the quick-return feed to action.

18. In a drilling-machine, in combination,

.a drill-spindle; a quick advance and return feed for said spindle; a flictiondriving means for actuating said'quick feed; means for holding said quick feed from action against the actuative tendency of said friction-driving means; and means for releasing the uick feed to action.

19. In a drilling-machine, in combination, a drill-spindle; a quick advance and return feed, for said spindle, said quick feed comprising a friction driving means; a detent for holding said quick feed from actuation by, said friction driving means; and means for withdrawing said dete'nt.

'20. In a drilling-machine, in combination, a drill-spindle a uickfeed, for advancing the spindle, said quidli feed comprising a friction driving ,means and. means for withholding said driving means from actionto move said spindle; and means for releasing said driving means. w r

21.. In a drilling-machine, in combination,

a drill-spindle having a quick feed, said quick feed comprising a friction driving means and means for locking said quick-feed mechanism against the action of said friction driving means; and means adapted to be manuallyoperated for releasing said locking means.

22. In a drilling-machine, in combination, a drill-spindle having a quick feed; said quick feed comprising a friction driving means, an oscillatory lever actuated by said driving means and having a gear connection with said spindle, means for adjustabl limiting the extent of movement of said ever, and means for locking said'quick-fe'ed mechanism against the action 'of said friction driving means.

.motion connection between said device and said lever.

25. In a drilling-machine, in combination, a drill-spindle, and a quick feed for advanc oscillatory lever havin with said spindle, a cran -'arm, a connecting- 8 ing the s indle, said quick feed comprising an .oscillatory llever having a gear connection with said spindle, a crank-arm,'rneans for rotating said crank-arm, and an I adjustable lost-motion connection between thecr'ankarm and the lever for moving said lever.

26. In a drilling-machine, in combination,

I a drill-spindle, and a quick feed for advancing the spindle, said quickffeed comprisingan oscillatory lever havin a gear connection with said spindle, a cran -arm,'a connectingrod extending between said crank-arm and said lever, and means adapted .to rotate said crank-arm.

27.- In a drilling-machine, in combination, a drill-spindle having a quick feed to advance the spindle, said quick feed comprising an a gear connection rod extending between said crank-arm and said lever, means constantly tending to rotate said crank-arm, and means for looking said crank-arm from rotation; and means for releasing said crank-arm to rotation.

28.. In a drilling-machine, in combination,

uick feed to ada drill-spindle having a p vance the spindle, said quic feed comprising an oscillatory lever having a gear connection with said spindle, a crank-arm, a yoke pivotally connected with said crank-arm and having an adjustable lost-motion connection with said lever; a shaft for rotating said crank arm, a constantly rotated pulley mounted on saidshaft and having a frictional engagement therewith, and means for looking said crank-arm from rotation; and means for releasing said crank-arm to rotation.

29. In a drilling-machine, in combination, a drill-spindle having a nick feed to advance the spindlefsaid quic feed comprising an oscillatory lever having a gear connection- With said spindle, a crank-arm, a yoke pivotally mounted on said crank-arm and having a sliding connection with said lever, means for adjustably limiting the extent of movement of said sliding connection, a shaft for rotating said crank-arm, a pulley arranged to be constantlyrotated, on said shaft,

means forcausing said pulley to frictionally' engage said shaft to rotate the shaft, and a the crank-arm; and means for releasing said crank-arm to rotation.

30. In a drilling-machine, in combination, a drill-spindle; a work-feed and a quick advance and return feed for said spindle, said quick feed comprisinga reciprocatory-device; and means for permitting, lost motion between said device and the spindle to ad- 'justably limit the effective movement of said device to operate the quick feed.

31. In a drilling-spindle, in combination, a drill-spindle; a quick advance and return feed for said spindle, said feed comprising a reciprocatory device;- and adjustable means locking-disk adapted to prevent rotation of for permitting lost motion between said device and the spindle, to limit the effective movement of said device to operate the quick feed. i

, 32. In a drilling-machine, in combination, a drill-spindle; and a quick advance and return feed for said spindle, said quick feed comprising a reciprocatory device and an oscillatory lever, said device having an adjustable limited sliding connection with said lever for limiting the efiective movement of said quick feed upon the spindle to lower the same.

33. In a drilling-machine, in combination, a drill-spindle; and a quick advance and return feed for said spindle, comprising an oscillatory lever having a gear connection with said. spindle, said lever also having an elongated opening therein, a crank-arm, a yoke pivotally connected with said crank-arm and having a block lying within the elongated opening of said lever, adjusting-screws at each end of said elongated opening, and means for rotating said crank-arm.

34. In a drilling-machine, in combination, a drill-spindle having a work-feed and a quick advance and return feed, said quick feed comprising an oscillatory lever having a gear connection with said spindle, acrank arm, a connecting-rod extending between said crank-arm and said lever, means tending to rotate said crank-arm, and means for locking said crank-arm against rotation; and means adapted to be operated by the movement of the Work-feed for releasing the lock to permit the return of the spindle.

35. In a drilling-machine, in combination, a drill-spindle having a work-feed and a quick advance and return feed, said work.- feed having a slip connection with said spindle, said quick feed comprising an oscillatory lever having a gear connection with said spindle, a crank-arm, a yoke pivotally connected with said crank-arm and having an adjustable lost-motion connection with said lever, a shaft for rotating said crank-arm, a pulley arranged to be constantly rotated mounted on said shaft and having a frictional engagement therewith, and means for locking said crank-arm from rotation; and means adapted to be operated by the movement of the work-feed for releasing said lock to permit the return of the spindle.

36. In a drilling-machine, in combination, a drill-spindle having a work-feed and a quick advance and return feed, said workfeed having a slip connection with said spindle, said quick feed comprising an oscillatory lever, having a gear connection with said spindle, a crankarm, a yoke pivotally mounted on said crank-arm and having a sliding connection with said lever, means for adjustably limiting the extent of the mo vement of said yoke relatively to said lever, a shaft for rotating said crank-arm, a pulley on said shaft arranged to be constantly rotated, means for causing said pulley to frictionally engage said shaft to rotate the shaft, and a locking-disk to prevent rotation of the crankarm, said disk being adapted to be rotated by said shaft {and means adapted to be operated by the movement of the work-feed for releasing said locking-disk to rotation.

37. In a drilling-machine, in combination, a drill-spindle; a work-feed for said spindle; a quick advance and return feed, independent of the work-feed, for the spindle; means adapted to be actuated by the operator for starting said quick feed to advance the drill- -spindle and for placing the work-feed in acti on; and means adapted to be automatically operated by the work-feed for actuating the quick-return feed.

38. In a drilling-machine, in combination, a drill-spindle a work-feed for said spindle; a quick advance and return feed, independent of the work-feed, for said spindle; means adapted to be actuated by-the operator for starting said quick feed to advance the drillspindle, and for placing thework-fee'd in action; and means carried by said spindle adapted to start the quick-return feed when the spindle reaches a certain point in its descent.

39. In: a drilling-machine, in combination, a drill-spindle; a work-feed for said spindle; a quick advance and return feed for the spindle; means adapted to be actuated by the operator for starting said quick feed to advance the drill-spindle; means adapted to be automatically operatedto suspend the advancing action of the quick feed; and means adapted to be automatically operated by the workfeed for starting the quick-return feed.

40. In adrilling-machine, in combination, a drill-spindle; an oscillatory lever having a gear connection with said spindle; a crankarm; a connecting-rod extending between the crank-arm and said lever; and means for intermittently rotating said crank-arm to oscillate said lever to quickly advance and return the drill-spindle.

41. In a drilling-machine, in combination, a drill-spindle; an oscillatory lever having a gear connection with said spindle; a crankarm; a connecting-rod extending between the crank-arm and said lever, said connectingrod having an adj us-tablelost-motion connec tion with said lever; and means forintermittentl rotating said crank-arm to oscillate said ever to quickly advance and return the drill-spindle.

42. In a drilling-machine, in combination,

- a drill-spindle, a work-feed for said spindle;

an oscillatory lever having a gear connection withsaid spindle to raise and lower the same; a crank-arm; a connecting-rod extending between the crankarm and the lever and having an adjustable lost-motion connection withsaid lever; means tending to rotate said crank-arm means for locking said crank-arm 1 3 o i from rotation; means adapted to be actuated by the operator for releasing said crank-arm to a partial revolution and for placing the work-feed in action; and means adapted to be automatically operated by the work-feed for further releasing said crank-arm to the remainder of its rotation.

43. In a drilling-machine, in combination, a drill-spindle having a work-feed and a quick-return feed arranged to feed said spindle alternately; means tending to drive said quick feed; a locking-disk adapted to be rotated with said quick feed, having a projecting portion for locking said disk from rota tion; a rod provided with a notch adapted to receive said projecting portion; and means adapted to be operated by the Work-feed for moving said rod to bring said notch into coincidence with said projecting portion to .re-

.lease said quick-return feed to action.

44. In a drilling-machine, in combination,

v a drill-spindle having a quick feed; means for driving said quick feed; a lockingdisk adapted to be rotated with said quick feed, said disk having a projecting portion; a rod for locking said disk from rotation, said rod being provided with a notch adapted to receive the projecting portion of said disk; means for moving said rod to bring said notch into coincidence with said projecting portion to release said quick feed to action; and means for moving said rod to bring the notch out of coincidence with said projecting portion.

45. In a drilling-machine, in combination, a drill-spindle having a work-feed and. a quick-return feed; means for driving said quick feed; a locking-disk adapted to'be rotated with said quick feed, said disk having a projecting portion; a rod for locking said disk from rotation, said rod being provided with a notch adapted to receive the projecting portion of said disk; means adapted to be operated by the work-feed for moving said rod to bring said notch into coincidence with said projecting portion to release said quickadapted to receive one of said flanges to release said quick feed to action; and means for moving said rod to bring the notch in said rod into coincidence with one of said flanges.

47. In a drilling-machine, in combination, a drill-spindle; a shaft for rotating said spindle; a Work-feed mechanism driven from said shaft and having a slip connection with said spindle; and a quick-feed mechanism for advancing said spindle driven independently of said shaft.

48. In a drilling-machine, in combination, a drill-spindle; a shaft for rotating said spindle; a work-feed mechanism driven from said shaft; a quick-feed mechanism for advancing said spindle driven independently of said shaft; and means permitting one of said feeds to overrun the other. 1

49. In a drilling-machine, in combination, a drill-spindle; a quick-feed shaft; means for rotating'said shaft; a friction-clutch between isms to overrun the other.

- BENJAMAN F. BARNES- Witnesses:

A. O. BEHEL, E. BEHEL.