US694784A

US694784A - Automatic drilling-machine.

Info

Publication number: US694784A
Application number: US6809001A
Authority: US
Inventors: Daniel Ramsay
Original assignee: Individual
Current assignee: Individual
Priority date: 1901-07-12
Filing date: 1901-07-12
Publication date: 1902-03-04
Anticipated expiration: 1919-03-04

Description

No. 694,784. Patented Mar 4, 19.02.

= D. RAMSAY.

AUTOIIAT IC DRlLLING MACHINE. A i lie ei n filed Jul 12, 1901. (No Model.) 4 Sheets-$haat i.

m: naims FETER'S 00.. PHGTO'LXYHOH wnsumc-rnu. n.

No. 694,784. Patented Mar. 4,1902. I u. BANISAY.

AUTDHATH) DRILLING MACHINE,

(Application filed July 12 1901.) v (No Model.) 2 4 Sheets$heet 2.

5 MM x 1 "ma Norm: PETEPS cu. morau'moxwasumm'uu, n. cy

No. 694,784. Patented Mar, 4, I902.

D. RAMSAY.

AUTOMATIC DRILLING'MACHI'NE.

(Application filed July 12. 1901.

(No Model.)

4 Sheets-Sheet 4.

-UNiTnD STATES PATENT O FICE.

DANIEL RAMSAY, OF PHILADELPHIA, FENNSYLVANIA.

AUTOMATIC DRILLING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 694,784, dated March 4, 1902. Application filed July 12, 19Q1. Serial No. 63,090. (No model.)

To all whom. it inn/y concern:

Be it known that I, DANIEL RAMSAY, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Automatic Drilling-Maor drilling machine constructed'in accordance with my invention. Fig. 2 is an end View of the machine looking in the direction of the arrow m, Fig. 1. Fig. 3is a view, partly in plan and partly in section, on the line a, a,

Fig. 2. Fig. 4. is asectional plan view on the line b b, Fig. 1; and Figs. 5, 6, 7, 8,and9 are views, on an enlarged scale, illustrating certain features of the invention not sufficiently illustrated in the general views of the drawings.

The fixed upright frame of the machine is represented at 1, this frame having at the rear bearings for the driving-shaft 2, which has fast and loose pulleys 3 and 4 for receiving the driving-belt and is also provided with a cone pulley 5 and a spur-pinion 6, as shown in Fig. 2. The cone-pulley 5 drives by means of a belt 7 a cone -pulley 9 on the shaft 10, mounted in suitable bearings at the top of the fixed frame, and said shaft has at its front end a bevel-pinion 11, which meshes with a bevel-wheel 12 at the upper end of the central drill-spindle 13 of the series of spindles employed in the machine, this series in the present instance comprising three spindles namely, the central spindle 13 and

spindles

14 and 15, one on each sideof the same. The hub of the bevel-wheel 12-is free to turn in, but is vertically confined to, a bearing 16 at the upper end of the fixed frame 1 of the inachine, and the upper end of the central drillspindle 13 is square, splined, or otherwise constructed so that it can slide vertically through the hub of said bevel-wheel, but is compelled to turn therewith. Each of the spindles is confined vertically to, but free to turn in, suitable hearings upon a transverse frame 17, which is connected by vertical rods 19 to a yoke 20, to which is connected the forward end of arope, cord, or chain 21, which passes over suitable pulleys 22 above the machine and carries at its opposite end a weight 23, as shown in Fig. 2, whereby the weight of the frame 17 and of the drill-spindles is counterbalanced and the raising and lowering of said spindles is thereby easily effected. In the present instance'the 'ce'nt'ralspindle 130i the series is adapted to a fixed bearing on the frame 17; but

the side spindles 14 and are adapted to bearin gs in laterally-adj ustable boxes 24, which at their rear ends are provided with nuts engaged by right and left hand threads upon a screwrod 25, which is laterally confined to a lug or projection 26 at the rear-0f the frame 17. Hence by turning said screw-rod in one direction or the other the boxes 24 can be moved from and toward each other to vary the distance apart of the drills of the series as may be desired. The side spindles 14: and 15 have spur-pinions 27, which are driven from a spur-pinion 29 on the central spindle 13 through the medium of intervening spurwheels 30, the spindles ofewhich are adapted to segmental slots 31 in the frame 17, as shown in Fig. 4, so that said spur-wheels can be moved in or out to accord with the distance between the spur-wheels 2,7 and'29, nuts 32 on the lower ends of the spindles serving to secure them in position after adjustment. The drill-spindles are free to move vertically in bearings 33, carried by a transverse bar 34:

on the fixed frame, the side bearings being adjustable laterally by means of a right and left hand threaded screw-rod 35 in the same manner as the upper bearings of said spindles.

A stripper-plate 36 operates in conjunction with each of the drills, these stripper-plates being secured to and depending from the lower bearings 33 for the drill-spindles, as

shown in Figs. 1 and 2. Vertical movement is imparted to the drill spindles in the following manner: Between collars 37 on the central drill-spindle 13 is vertically confined a cross-head 39, which is also by preference secured to the side rods 19 of the drill-carrying frame 17, so that vertical movement imparted to saidcross-head will be partaken of by all three of the drill-spindles. A pin on the back of the cross-head is connected by a link to a crank-pin on a disk 41, said crankpin being adjustable from and toward the axis of the disk, so as to vary its throw in accordance with the desired extent of vertical movement to be imparted to the drills. The disk 41 is secured to a shaft 42, which is free to turn in suitable hearings on the fixed frame and has secured to it a ratchet-wheel 43 and a duplex spur-wheel composed of two toothed segments 44 and 45, mounted sideby side, as shown in Fig. 2, and adjustable circumferentially, the toothed portion of each segment being slightly in excess of one-half of the circumference of the wheel, so that by properly adjusting these segments in respect to each other a toothed segment of any desired extent between one-half of the circumference and the entire circumference of the wheel can be formed. One of the segments may be keyed or otherwise secured to the shaft 42 and the other adjusted by turning it to the proper extent in respect to the fixed segment and then secured thereto bya bolt 42, carried by the web of one segment and entering one of a series of openings 42 in the web of the other segment, as shown in Fig. 9. The toothed portions of both segments are adapted to mesh with a wide spur-pinion 46, which is free to turn on a short shaft or stud 47 at the back of the machine, this shaft or stud also having a spur-wheel 49, which meshes with the spur-pinion 6 of the driving-shaft 2. When the spur-pinion 46 is in mesh with the toothed portions of the segments 44 45 or either of them, therefore power will -be transmitted to the shaft 42 through the medium of the spur-gearing shown and described; but when a blank portion of the duplex segmentwheel is presented to the spur-pinion 46 other means must be resorted to for rotating said shaft 42. For this purpose, therefore, the ratchet-Wheel 43 is engaged by spring pawls 50, hung to the face of a worm-wheel 51,which is mounted so as to turn loosely on the shaft 42 and meshes with a worm 52 at the lower end of a short vertical shaft 53, which has at its upper end a bevel-wheel 54, meshing with a bevel-pinion 55 on a transverse shaft 56, the latter having at its rear end a pulley driven by a belt 57 from a pulley on the top shaft 10 of the machine. A slow and powerful movement can therefore be imparted to the disk 41, this movement being that employed when the drills are descending and acting upon the work, quicker movement of the drill-spindles being effected at other times by means of the directspur-gearing connection between the driving-shaft'and the shaft 42, the teeth of theratchet-wheel 43 in this case slipping under the pawls 50. The worm-shaft 53 has its upper bearing in a fixed portion of the frame of the machine; but the lower bearing of said shaft is in an eccentric sleeve 59, mounted in a bearing on the fixed part of the machine, as shown in Fig. 6, the upper collar 60 of said eccentric sleeve having a handle 61, whereby it may be turned in its bearing, and said handle being provided with a spring-actuated locking-bolt 62, which by engagement with suitable notches in the top of the bearing will serve to retain the eccentric sleeve in different positions of adjustment. By turning the sleeve, therefore, the worm 52 can be moved out of engagement with the worm-wheel 51 when it is desired to effect such release, the spring of the shaft permitting such movement. As the duplex segmentwheel of the shaft 42 is when said shaft is being operated by the worm-gearing described moving at a slower rate of surface speed than the pinion 46, I find it advisable to use for the first tooth of the segment 44 a yielding or elastic tooth which as it is gradually brought into position to mesh with the teeth of the pinion 46 will be free to spring or yield when the teeth of said pinion 46 first come into contact with the same and act only upon the crown of it, the teeth finally meshing with a tooth of the pinion when the segment has been moved forwardly to such an extent as to permit of the proper hold of the tooth of the pinion upon it. This spring-tooth is shown in Fig. 5 of the drawings and consists of a plate 63, secured to the blank portion of the periphery of the segment and bent backward upon itself, as shown at 64, to form a proper tooth outline, a recess in the periphery of the disk permitting the springing inward of the tooth to the limited extent required before a tooth of the pinion 46 can properly mesh with the same. a

The work-carrying table or bed 66 of the machine is guided in the fixed structure 67, which is located in advance of the lower portion of the upright frame 1 of the machine, lon= gitudinal reciprocating movement of said table or bed being effected by engagement of a nut on the under side of the same with a longitudinal screw-shaft 69, which turns in bearings in the structure 67, as is common in mechanism for reciprocating the .tool-carriages of lathes and similar metal-working tools. The nut which engages with the feedscrew 59, however, is of the peculiar duplex construction shown in Fig. 7, and comprises two brackets 70 and 71, mounted on the under side of the table 66 and each terminating at its lower end in a nut engaging the screwshaft 69. The bracket 70 is fixedly secured to the table; butthe bracket 71 is adjustable from and toward the bracket 70 by means of a transverse bolt 72 and nut 73. Hence the two parts of the'nut can be moved from and toward each other to compensate for any wear of the threads of either the screw 69 or of the nuts of the brackets, so that close fit of the screw to the opposite nuts is therebyinsured and any backlash or play of one in respect to the other is effectually prevented.

On the main table or bed 66 is mounted a pair of transverse guides 75, each provided with a central screw-shaft 76, and each of ICC these screw-shafts engages with anut 77, as. shown by dotted lines in Fig. 3, said-nuts be:v ing formed on or connected to the under sides of the plates 79, which are free to slide in the guides 7 and carry opposite longitudinal rails 90 and 91, preferably of the angular.

cross-section shown in Fig. 2, the rail 91 having confining-bolts 92, whereby the plate or ----Ltion transverse to-the movement of said work follows: Vertically confined between collars. on thecentral drill-spindle 13 is a sleeve 93,-

short transverse shaft 97, which is providedother object to be drilled can be confined between the two rails. I

-Movement-of the work table or bed in its guides and of the work-carrier in the directable or bed is edectedby the return or rising movement of the drill-spindle carrier, the

mechanism for causing this result being as which is free to move vertically in'a bearing 94=on the fixed frame and has atthe back a rack 95, passing through a slot in said hearing and meshing with a spur-pinion 96 on a I at, its outer end with a chain-wheel 99,-said wheel receiving a chain belt 100,which drives asimilar-chain-wheel 101, secured to a shaft 102, mounted insuitable bearings in theup :right frame 1 oft-he machine, said shafthav-' ingsecured wit a hub with arms 103, which are adapted by contact with pins 104 on a chain-wheel 105,loose on the shaft 102, to turn said chain-wheel forwardly'or in the direction of the arrow shown in Fig. 2. One of the arms 103 also plays between one of the pins-101 and a set-screw 106, carried by a stud 107 on the face of the chain-wheel 105. Hence said arm is also capable of imparting -backward movement to said chain-wheel,

the distance between the end of the set-screw.

110 on a shaft 111, mounted in bearings in a standard 112 and in the upright frame of the mach-ine,-said chain-wheel 110 having springpawls 113, which engage'with a toothed disk 114 on the shaft 111, the chain-wheel 110 being free to turn in either directionupon said shaft. The variouschain-wheels are so pro- I portioned thateach lift of the drill-spindle carrier will impart to the chain-wheel 110 movement to the extent of at least one-half a revolution in each direction, so that by reason of the pawls 113 and tootheddisk 114 intermittent forward n10vements-of a half-turn will be impartedto the shaft 111. The said shaft 111 has at its outer end a. spur-wheel 115, which meshes witha spur-wheel 116, the latter meshing with aspur-pinion117 ona shaft 119, which is mounted in bearingsin a standardor bracket 120, the shaft or spindle of the spur-wheel 116 being adapted to a longitudinalslot 121 in a lever'122, which is hung;

to the shaft 119 and has a slotted segment 123 for the reception of a studon the fixed frame, to which stud the segment can be secured by means of a uut-12e thereon. This construction provides for the use of spur wheels 116 and 117 of any desired size, which thus constitutechange-wheels whereby the half-revolutions imparted to the spur-wheel may be caused to impart any desired fraction of a revolution to the shaft 119, depending upon the amount of 'feed of the-table 66 required between successive actions of the drills.

to a bearing on the structure 67; the other arm of said lever having a spur-wheel 129, which is constantly in mesh with the spurwheel-126. The outer end of=the 1ever127-isconnected by means of a link to a radiallyadjustable crank-pin 131 on a disk 132, car

ried by the outer end-of a shaft l33 which is adapted to suitable bearings on the front of the structure 67' and has another spur-wheel 134, which when the table 66 is at one limit of its movement meshes'with a spur-pinion 135 on a shaft 136, mounted in suitable bearings in brackets secured to the-guides75of said table-66, said shaft 136 having another pinion 137, with which the'spur-wheel 134- meshes when the table 66 is at the opposite limit of its movement. The shaft 136also has bevel-pinions 140, which mesh with -cor-. responding bevel-pinions 141 atthe'frontends.

of -the feed-screw shafts 76 of the guides 75,

and the rear ends of said screw-shafts have bevel-pinions 142; which mesh with similar bevel-pinions 143 on a shaft-l4t4=, adapted .to

bearings inbrackets at the rear ends of the guides 75,saidshaft144= having spur-pinions 1 15 and 146, which alternately mesh with a toothed segment 147 on a shaft 149, adapted to a bearing in the upright-frame 1 of the machine, the pinion 115- meshing with said toothed segment'when-the table-66 is at-oue limit of its-movement and'the pinion- 146 meshing with the toothed segment 147 when the table 66 is at the opposite end of its-movement. The shaft lE-l receives movementfrom the shaft lllthrough the-medium of- ;intermeshing spur-pinions 150 and 151, as shown, in'Fig. 3. 'When the work-carrier is at either limit of its longitudinal-travel, therefore, thefeed-sc rews 76 of the guides 75 will have movement imparted to them-sufficient togivethe desired transverse movement to the work-carrier, and at the same time the shaft 136 will be operated, so as to impart movement of, par--- tial-rotation to the shaft 133, this movement being sufficientrto carry the crank-pin 131 of the disk 132throughoutahalf-turn that is The shaft 119 hasanother spur-wheel- 125, which meshes with a spur-wheel 126,-carried by-one arm of a lever 127,- which is hung 'to'say, from bottom to toportop to bottom H 'ofthe disk, therebyeffecting a rocking-ofthe.

lever 127 and causing the spur-pinions 126 and 129v to engage alternately with the spurwheel 152 at the outer end of the feed-screw 69, which operates the main table 66. lrVhen the leverl27 is in the position shown in Fig. 2, the spur-pinion 126 is the only one intermediate between the spur-wheel 125 and the spur-wheel 152; but when the lever has been shifted so as to carry the pinion 126 out of mesh with the spur-wheel 152 and the pinion 129 into mesh therewith both of the

pinions

126 and 129 will be interposed between the spur-wheel 125 and the spur-wheel152. Consequently the feed-shaft 69 will be rotated in a direction the reverse of that which it receives when the parts are in the position shown in Fig. 2. rotation of the feed-screw is thus provided for at each end of the travel of the table 66, and at the same time the work carrier is moved transversely to the feed-table, so that after forming one row of openings in a plate or other object during one movement of the table 66 another row of openings in a different plane is formed therein on the reverse movement, and so on until any desired number of rows has been produced. A complete spur wheel or pinion may be used instead of the segment 147, if desired.

In the drawings I have shown a series of three drills arranged side by side in the same plane; but the number and grouping of the drills may be Varied in accordance with the character of the work to be performed. The transverse guides 75 are also shown as inclined at an angle other than a right angle to the table or bed 66; but it will be evident that the angle of these guides may be varied as desired and a single transverse guide may be used, or, on the other hand, more than two of these guides may be employed.

In order to prevent any possibility of backward movement of the shaft 111, due to the frictional hold of the chain-wheel 110 thereon while said chain-wheel is being turned backwardly, I provide the said shaft with a notched collar 153, as shown in Fig. 1, this notched collar engaging with a sliding springbolt 154:, mounted in the bearing 112, when said shaft 111 comes to rest after having completed a forward half-turn. Hence the shaft is effectually locked against any backward movement which would interfere with the proper operation of the feed-screws of the work table or carrier.

It will be observed that my improved machine is wholly automatic in its action, that the feeding of the work is positive in each direction, and that all desired facilities are provided for adjustment of the work in respect to the drills or for adjustment of the latter in respect to the work. Hence the machine is capable' of performing a wide range of operations.

Having thus described my invention, I claim and desire to secure by Letters Patent- Proper reversal in the direction of 1. The combination in a vertical drillingmachine, of a drill-spindle, means for vertically reciprocating the same, a work-table, a

work-holder guided transversely on said worktable, feed-screws for the work-table and work-holder, and gearing whereby the vertical movement of the drill-spindle is caused to impart movement to said feed'screws, substantially' as specified.

2. The combination, in a -"ertical drillingmachine, of a drill-spindle, means for rotating and vertically reciprocating the same, a work-table and longitudinal feeding devices therefor having as elements a spur-wheel on the feed-screw, a driving spur-wheel, and a lever carrying two spur-pinions meshing together, one of said pinions being also in mesh with the driving spur-wheel,whereby the rocking of the lever will permit either of its spurpinions to mesh with the spur-wheel of the feed-screw in order to reverse the direction of rotation of the same, substantially as specified.

3. The combination, in a vertical drillingmachine, of a drill-spindle, means for rotating and for vertically reciprocating the same,

a work-table, and feed-gearing interposed between the vertically-rcciprocated spindle and the work-table, one of the elements of said gearing being a lost-motion clutch whereby feed movement of the table will be arrested until the drill is withdrawn from the work, substantially as specified.

4. The combination, in a vertical drillingmachine, of a drill-spindle, means for rotating and for vertically reciprocating the same, a work-table, and feed-gearing interposed between the drill-spindle and the work-table and having as elements a pawl-and-ratchet clutch whereby movement is imparted to the feed-screw only when the drill-spindle is reciprocating in one direction, substantially as specified.

.5. The combination, in a vertical drillingmachine, of a drill-spindle, means for rotating and vertically reciprocating the same, a work-table, a feed-screw therefor, and gearing interposed between the drill-spindle and said feed-screw, and serving to transmit movement from one to the other, elements of said gearing being change-wheels whereby the extent of movement of the feed-screw on each reciprocation of the drill-spindle can be varied, substantially as specified.

6. The combination, in a vertical drillingmachine, of a drill-spindle, means for rotating the same, and reciprocating devices for said drill-spindle comprising a shaft having a spur-segment thereon, a pinion for driving the same, a loosely running and continuously-driven worm-wheel on said shaft, and a one wayclutch connection between said worm-wheel and the shaft, substantially as specified.

7. The combination, in a vertical drillingmachine, of the drill-spindle, means for rotating the same, and reciprocating devices for the spindle comprising a shaft and two independent driving devices therefor, one having 1 a one-way clutch whereby it is connected to the shaft and the other having an adjustable spur-segmentcomprising two memberseach with partially-toothedperipheiyQsaid members being adjnstable' circu'mferentiallyon the shaft so as to increase orediminish the extent of toothed segment'presente'd, slnbstang tially as specified.

' S. The combination in a drilling-machine,

of a drill-spindle, means fori'otatin g the same,v

' toimpart reciprocating movementto the'drillspindle, and gearingfor rotating the shaft and reciprocating devices for said'drill-spindle comprising ashaft having a toothed'segment whose" leading tooth is yielding and' elastic, a pinion for drivingsaid segment,

means whereby rotation of the shaft is caused shaft When'its segment is out of'mesh with the driving-pinion, substantially as specified. I

10. The combination, in a vertical drilling machine, ofthe work-table; means for reciprocating thesame, a"work-h'old'er, guides Witnesses:

therefor, disposed transversely of the feedtable,transverse feeding devices for the workholder, and gearing whereby said feeding devices are rendered operative when the worktable reachesthe limit of its movement fin either direction, substantially as specified;

11. The combination, in a vertical drillingmachine, of the feed table, meansfor reciprocating the same, a work-holder, gnides for said work-holder disposed transversely of the, "feed-table,work-holderfeeding deviees,gearing for operating thesame ateither'limitfof movement of the feed-table, reversing-gearing for the feed-table, and gearing whereby said'j'reversing devices are ope'ratedby the work-holder' feeding mechanism at either end of the travel of the feed-table, substantially asspeeified; H g

12. The combinatiomina vertica'i drilling machine, of the drill spindle, means'for rotat ing and for vertically reciprocatingthe same,

a work-table, feeding devices therefor, and

feed-operating gearing interposed between the drill-spindle and'said ivorlr-t'ablefeeding devices and having as'elements acne-way clutch whereby forward movement is impart- "ed to the feeding devices, and a spring-lock whereby backward movement of said feeding devic'sis prevented, substantially asspecified.

In testimony' vhereofl'havesigned my name to this specification in thepresenee of two subscribing witnesses;

' DANIEL RAMsAY;

FQEIBEZCHTOLD, JOS.H.KLEIN. I