US1121995A - Tool-grinder. - Google Patents

Description

H. G. 'ELVERS.

TOOL GRINDER. APPLICATION FILED JUNE 27/1914. 1,121,995. Patented Dec. 22, 1914.

4 SHEETSSHEET 1.

. "Ilium I M [Illllll LO Y7 "l f7aaera J01 il 706 67.350571? u. 0. ELVERS.

TOOL GRINDER;

APPLICATION FILED JUNE Z7, 1914.

Patented Dec. 22, 1914.

4 SHEBTS-SHEET 2.

H. 0. ELVERS.

TOOL GRINDER. APPLIGATION FILED JUNE '27, 1914.

Patented Dec. 22, 1914.

4 SHEETS-SHBET 3.

H. 0'. ELVERS.

TOOL GRINDER.

APPLIOATIONTILED JUNE 27,1914. I 1,121,995. Patented Dec. 22, 1914.

B 4 SHEETSSHEET4.

' To all whom it may concern UNITED STATES PATENT OFFICE.

- Him 0.. ELvEns, or MADISON, wIscoNsIN, ASSIGNOR r eIsnoLr MACHINE I comramr, or usmson, WISCONSIN, A. oonronnrron or WISCONSIN.

woonenmnnn.

Be it known that I, HANS C..ELVERB,"&

'citizen of the United States, residing .at

Madison, in the county of Dane and State of Wisconsin, have invented certain new and useful Improvements in Tool-Grinders,

of which the following is a specification. v

This invention relates "to improvements in tool grinding machines, and has reference more particularly to improvements in that class of grindin machines that are adapted to sharpen meta working tools em loye'd on lathes, boring mills and other'mac ine shop tools. I

" Among the objects of the invention are,

making it adjustable to the decreasing size of the emery wheelas-the latter wears down,

to provide a novel attachment for the tool holder to facilitate the grinding of broad facing cutters and'which shall have an op erating mechanism of its own adapted to be actuated when the regular tool holder is locked in a stationary position, to provide a novel one-piece or integral frame and basin or pan, to provide a novel means'for locking the. tool holder in stationary position when it is desired to grind'flat or broad facing cutters by the attachment above referred to,

to provide means for oscillating the tool holder either manually or by power across tical'section, of the complete-machine; Fig.

.the face of the emery wheel, and to rovide means for adjusting the; position on; tool held in the-tool holder'wi'th'relation to the emery wheel in a direction at right angles to the horizontal pivotal axis of the tool holder support. 1 f

Other minor objects and advantages of the invention will be apparent" from the following detailed description, taken in con nection with theaccompanying drawings,

Figure 1 is a side elevation, partly in ver- 2 isl-a fragmentary side elevation illustrating the sectional and adjustable character of the hood of" the emery wheel; Fig. 3 is a front elevation, partly in vertical section, of

the complete machine; Fig. 4 is a horizontal section substantially in the plane of the stationary tubular arm on; which the tool holder. carriage isTmounted-for oscillation crosswise of the faoe'of-theemery wheel;

' lug block and adjustably' keyed by a set'scr'ew. r 27. To the forward edge of the adjustable I V Fig. 5 is an enlarged detail view, partly, in elevation and partly in vertical section, on the line 55 of Fig. 7, showing the means for locking 'the hand lever by which the tool 4 4 Specification of Letters fatent. Patgnted Dec. 22, 1914. n pusauon am June 27, 1914. Serial No. 847,592.

holder is oscillated either to the frame of the machine or to a power operated lever;

- Fig. '6 is a detail view of the same mechanism in horizontal section on the line 66 ofFig. Fig. 7 is a detail view of thesame mechanism, artly in sideelevation and partly in ver ical section; Fig. 8 is an end '-elevat 1on of the tool holder attachment for grinding broad facing cutters, and Fig. 9 is a top plan View of the attachmentshown in Fig. 8.'

' Referring to the drawings, the frame of the machine is preferably formed in a single cast ng and comprises the base plate 10, a

column 11 risin from the rear of the base plate, and abasm 0r pan 12 risin from the front portion of the base plate; n the upper end of the column 11 is suitably jour naled a spindle 13,- on one end of which is secured the usual cu -'sha ed em'ery wheel 14. In the lower portion 0 I the column 11 is journaled a driving shaft 15 carrying fast and loosepulleys' 16 and 17, and a transmission pulley 18 connected by a belt 19 ex tending-through the hollow column-11 to a pulley 20'fast on the spindle 13.

5 Surrounding and inclosin the periphery and rear side ofthe emery w eel 14 is a two'- part adjustable hood, the same comprising a stationary-section 21. securedto the bearing block of the spindle 13 and covering-the rear side and rear portion of the circumfer' ence'of the-emery-wheel, and an adjustable [section 22 covering the forward peripheral portion of the emery wheel and o si flicient diameter'to telescope over the stationary sec}.

tion 2'1. The adjustable section 22 is sup orted by an arm'23 to which it is secured y a lug-24 and'set screw 25,the rear end of said arm being adjusta'bly mounted in a 26' on ,the side of the spindle bearing hood section 22 is hinged, the cover plate 28 which guards 'the working face of. the emery wheel opposite that portion, engaged by the tool in the grinding operation.-

the hood section 22 can be adjusted rear-- wardly overthe section 21 so as to make the total width of the. hood conform at'all times substantially to that of the emery wheel. One advantage 1 of this construction grows out of the fact that the water supply nozzle 29 is usually mounted on the forward edge of the hood, and by maintaining a substantially constant relation of the forward edge of the hood to {the grinding edge of the wheel the water jetis-most efiectively dicured vw ithin the frame anQg b i the p machine. This hollow s or Q prises a rear portion 37 (Fig. .1) duced portion 38, an annular shoulder-.39

being formed on the junction of the. two portions. The rocking plate 34 is secured:

in adjustedposition by a cla'mpflstud 40 (Fig. 1) entering one side of-Tthesaddle frame 86 and passing through aslotted segment bar 41 fast on the rocking plate-.34.

The saddle frame 36 is formed 351$) inner end with a split collar 42 that embraces the larger section 37 of the supporting arm, and it is formed at its forward end with a similar split collar 43' that embraces the reduced inner end of a tubular stem member 44 that is slidably mounted in a hole in the front slide of the basin 12 and itself is movable endwise on the reduced portion 38 of the hollow tool holder supporting arm. The bearin collar 43 is confined on the inner end o the stem member 44 by a nutf45. Journaled in the outer end ofthe. stemmember 44 is a shaft 46 having a threaded portion extending axially of the stem member 44 and engaging a nut 47 secured to the for-' ward end of the tubular arm section 38. On

the outer end of the shaft 46 is a hand wheel 48, by 'turning which the'stem member 44 and the tool carrier connected thereto is adjusted to and fro from the grinding face of the emery wheel in the direction of the axis of the latter. Secured to the inner wall of the basin '12 are crescent-shaped shields 49 and 50 that extend through arc-shaped slots in the forward-end and rear ends of the base plate of-the saddle fraine.36 and serve to protect the bearing's42 and 43 of the latter rom the water and grit'that falls into the basin.

Referrin now more particularly to Fig. 4 and the etail views, Figs. 5, 6 and 7, 51

designates. a hand lever journaled at it 1...

vertical position.

, 7) with... which engages a nerend by a hub 52 on the reduced portion 38 ofthe tool holder supporting arm, said lever extending through'an opening 53 (Fig. 3) in the side of the basin 12 and. terminating in a handle 54. The outer portion of lever 51, inwardly of the base of the handle '54, is somewhat enlarged and suitably chambored to accommodate adjusting and locking enlarged portion of the lever 51 is a horizontal locking bolt 55 formed on. its upper side with a rack 56 and in its outer side with three notches, consisting of a central notch 57 and notches 58 and 59 -lying to either side of said central notch (see Fig. 5). Journaled in the lever 51 above and at right angles to the locking bolt 55 is a short shaft 60 (Fig. 7) having formed on its inner end a pinion 61 meshing with the rack 56 of the locking bolt and having on its outer end a vertical operating handle 62. One end of the locking bolt 55 hasa reduced and flatteuedextension 63 (Fig. 5) that, when the bolt isshot in one directionby turning the handle 62 downwardly to the right, engages a'notch 64 formed in a stationary bracket 65 secured to the outer surface of the basin 12, thereby locking the lever 51 rigid with the frame of the machine. Slidingly mounted within the handle 54 is a spring-actuated locking pin 66 that, when the locking bolt 55 is shot to any of its three positions, autoinatically engages one of the notches 57, 58

for 59 of the locking bolt to lock the latter in its set-position. To a depending extension .52 of the hub 52 oflever 51 is secured by a bolt,.l16 a counterweight 117 that substantially balances the tool holder and its assotipped to either side of a 'eiated parts when designates another lever arm that is also mounted to rock on the main supporting arm 38 by means of a hub 68, the forward end of which lever is formed with a-worm wheel sector 69 (Fig. worm 70 formed on'a vertical shaft 71 journaled in upper and lower'bearings 72 and 73 formed-on the lever 51, the upper end of the shaft 71 having a milled head 74for actuatingthe same.

Throu h. this worm gear mechanism the lever 6 is at all times connected to the lever devices, as hereinafter described. In a bearing or bed formed in and crosswise of the llILtl) 51, and the lever 67 is itself-connected to the I saddle frame '36 of the tool holder by means of a short upwardly extending arm 5 (Fig. 7) on the lever 67, a sleeve or-boss 7 6 on the upper end of arm 75, and a pin or rod 77 carriedby any and slidingly engaging the sleeve 76.

' By means of the worm and worm sector connection between the levers 51 and 67 'it is possible to adjust the position of the tool held in the tool holder relatively to the emery wheel in a direction at right angles to the axis of the main supporting arm 38,

the saddle frame 36 and pivot- {Which is llite "desirable; where teas-tat to be roun that .wheli clamped in theteol hol er, project varying distances or. at varying angles from the face of the latter- Sofar as I ani aware, in-grindihg ma chines of this character no provision has ever been made for' power operation of the tool holder. In the present machine I have incorporateda mechanism by which the tool holder can heoperated eithermanlial-ly or from the same power shaft by which the spindle and emery. wh'eela're'driven, and this mechanism will now be described.

Referring firstto Fig. 4-, 78 and 79 designate two arms of a power lever that are connected at their'inner ends by a bearing ring or hub 80 which is also journale'd on the main supporting arm 38,- and which lever,

extendsentirely across the basiiiv12 of the -machii1e frame- As will be seen by reference to Fig. 1,- the lever supporting rings or hubs .52 and: so. are set sideby side on the arm 38 and are turned downzen theirv inifer or opposing faces "to provide a seat or bearinLgfor the supporting ring or huh'68 of the lever 67: the entire assembly beihg confined.

sidewi'se between the shoulder 39 of the sii" portingaarm anda ring .81 fastened to 't e desired between zero and the maximum ra-" dius of the diskby the connection shown comprising. an undercut slot 85 extending counter shaft 83 that carries the crank disk.

diametrically across the face of the disk, and a wrist-pin 86 on which the pitman 110' is mounted and WhlOlfllS adjustable lengthwise of the slot- 85 by a clampiiig bolt 87. Splined on the inner end of the drive shaft 15 is a pinion '88 controlled by a lever 89 pivoted to lthegear easing-'84 and connected by a link 90-tothe-lower eiid of an arm 91 fast on a shaft 92, whichlatter is journaled in a bearing bracket 93 and carries at its other end an operating handle 94.- By this means the pinion 88 is 'sl'idable into and oiit of engagement with a spur gear 95 journal'ed within the gear casing 84;, which spur gear 95 carries a pinion 96 that, in. turn, meshes with a spur gear 97 fast on the 82. By manual-manipulation of the operating handle 94, therefore, the power lever 78, 79, 80 can be connected Wlth or disconnected from the power shaft 15.. The other arm 78 of this power lever extends parallel with the lever arms 51 and 67 through the opening 53 and, at its outer end, is formed with an arc-shaped head 98 in the outeredge. of which is formed a groove 99 (Fig. 4);;

that engages aii arc-shaped tat't'gue 100' sttutttito" th'e itvet 51. f In e inner side-of the' -h'ead 98 of the lever arm 78 is forhied a notch orhole v101 (Fig. 5) into which the right hand end ofthe locking bolt "55 is shot byswiiiging the handle 62 to the-left, there- 7 by lockin the lever the 8 to the lever arms 51 and 6 ,f whei'eby the- )"scillating move- 1 merits of the tool holder around the supportin arm 38 ma be effected by power.

F'rornthe foregoing it will be readily 1m.- derstood that when th locking in 66 engages the central note 57 of t e locking bolt'the latter is in idle-positionfwhen the' lohking pin -66 engages the right hand notch 59, the lever arms 51 and 67 are locked .to go I the fraiiie-fof the machine; and when the locking 'pin 66 engages the lefthand notch the ettertpe ting mechanisms!) as to'b'e It may at hated that the .p tvetievet 78 canbe allowedto oscillate continuoiisly even 'tthefi the opeater is oscillating the tool Home by at-@1554; and thus .11- l he has to do when he. wishes to connect hp is to t tf tt the handle 62 to theleft and the spring-actuated pin 66 will then force'the lock bolt 55 into its seat 101 as-th'e lever oscillates past the .lock.bolt. As the'operator is "cons'taiitly engagin and disen aging the power oscillating m ianism, thfs feahire is quite valuable si' e it makes it uniieeessary to reach over to handle 94 for shifting the" sliding ge'ar inand out every time that he wishes to change from manual .58. thele'verfarms '51 and state lockedto the tool holder to the power oscillating lever v its screws 104. The tool clamp is formed with a dovetail'slide'105 on its rearside which 'ehgagesa slideway 106 in a holder 107, being confinedin place by a gib 108. The holder 107 is formed with a stem or shank 109 that is secured in the tool holder head proper 30. on the lower edge of. the tool clamp 102 is a rack .111 engaged by a pinion 112 on the lower end of a shaft 113 journaled in a vertical bearin 114' on the rear side of the holder 107; an on the upper end of the shaft 113 is ,an operating handle 115. In

using this attachment the same is mounted and forth across the fac'etof the emery wheel 5y oscillating .the arm ,As show n,'the

pi'xiin 1121s made of tathen igt diameter by its shank 109. in the head 30, the latterso that it is only necessary to swing the handle 115 through an arc of about 120 degrees.

I claim:

1. In a tool grinder, the combination with an emery wheel, and a tool holder head mounted to oscillate across the face of said emery wheel, of means for locking said tool holder head in stationary position whereby to adapt the same to receive a manually operated attachment for the grinding of broad facing cutters and like tools.

2. In a tool grinder, the combination with a column and an emery wheel jou'rnaled in the upper end ofsaid column, of a basin formed integrally with said column, a hori-- zontal .arm at its outer end projecting through and supported by one side of said basin, a tool holder mounted on said arm within said basin, and means for oscillating said tool holder across the face of said emery wheel.

8. In a tool grinder, the combination with a frame and an emery wheel journaled therein, of a .horizontal arm on said frame, a tool-holder mounted-to-oscillate on said arm, a hand lever pivoted at its inner end on said arm and connected to said tool-holder, and means for locking said hand-lever to the saidframe.

at. In a tool grinder, the combination with a frame and an emery wheel journaled therein, of a horizontal arm on said frame, a tool holder mounted to oscillate on said arm, ahand lever connected to said tool holder, a locking bolt slidably mounted in said hand lever, a bracket secured to the frame later- {ally opposite said hand lever and formed with a socket to receive one end of said locking bolt, and means on said hand lever for actuatingsaid locking bolt into and out of engagement with said socket.

5. In a tool grinder, the combination with a frame and an emery wheel jiournaled therein, of a horizontal'arm on said frame, a tool holder mounted to oscillate on said arm, a hand lever connected to said tool holder, a locking bolt slidably mounted in said hand lever and formed with a rack bar on one side thereof, a bracket secured to the frame laterally opposite said hand lever and formed with a socket to receive one end of said locking bolt, a pinion journaled in said hand lever and engaging. said rack bar, and means for turning said pinion. V

6. In a tool grinder, the combination with a frame and an emery wheel journaledtherein, of a horizontal arm on said frame, a tool holder mounted to oscillate on said arm, a hand lever connected to said tool holder, a locking bolt slidably mounted in said hand lever, a bracket secured tothe frame laterally opposite to said hand lever and formed with a socket to receive one end of said locking bolt, means on said hand lever for actu ating said locking bolt into and out of, engagement with said socket, and means on said hand, lever for securing said locking bolt in either locking or released position.

'7. In a tool grinder, the combination with a frame and 'an emery wheel journaled therein, of a horizontal arm on said frame, a tool holder mounted to oscillate on said arm, a hand lever connected to said tool holder, a locking bolt slidably mounted in said hand lever and formed with a rack bar on one side thereof, a bracket secured to the frame laterally opposite said hand lever and formed with a socket to receive one end ofsaid locking bolt, a shaft journaled in said hand lever at right angles to said locking bolt and having a pinion on one end engaging said rack bar, a handle on said shaft for turning the same, I and means for automatically securing said locking bolt in locking or released position.

8. In a tool grinder, the combination with an emery wheel, and a tool holder mounted to oscillate across the face of said emery wheel, of hand operated means for oscillating said tool holder, power operated means for oscillating said tool holder, and means for rendering either said hand operating means or power operating means eflective at the choice of the operator.

9. In a toolg'rin'der, the combination with an emery wheel, and a tool holder mounted to oscillate across the face of said emery wheel, of a hand lever for oscillating said tool holder, a power actuated lever for 0s cillating said tool holder, anda locking bolt slidably mounted in one of said levers and adapted to engage and disengage a socket ,in the other whereby to couple said levers together for power operation of the tool holder or to uncouple them for hand operation thereof.

10. In a tool grinder, the combination .with an emery wheel, and a tool holder mounted to oscillate across the face of said emery wheel, of a hand lever for oscillating said tool holder, a power actuated lever for oscillating said tool holder formed with a socket therein, a locking bolt slidably mounted insaid' hand lever forcOiiperation with said socket and formed with a rack bar on oneside thereof, a pinion journaled'in said hand lever and engaging said rack bar, and means for turning said pinion.

11. In a tool grinder, the combination with a frame and an emery wheel journaled therein. of a horizontal "arm on said frame,

a tool holder mounted to oscillate on said a socket therein, a bracket secured to theframe opposite the other side of said hand' lever and formed with a socket, a locking arm, a hand lever connected to said tool bolt slidably mounted in and crosswise of said hand lever, and means for actuating said locking bolt into engagement with said bracket, or with said power operated lever, or to an intermediate position wherein it is disconnected from both.-

12. In a toolgrinder, the' combination with a frame and an emery wheel journaled ther i of a horizontal arm on said frame, a tool holder mounted to oscillate on said arm, a hand lever connected to said tool holder, a power operated lever pivoted on said frame and extending substantially parallel with said hand lever and formed with asocket therein, abracket secured to the frame opposite the other side of said hand lever and formed with a socket, a locking bolt slidably mounted in and crosswise of said hand lever, and means for automatically securing said locking bolt in any of said three positions.

13. In a tool grinder, the combination with a frame and an emery wheel j ournaled therein, of a horizontal arm on said frame, a tool holder mounted to oscillate on said arm, a leverpivoted on said arm and connected to said tool holder, a second lever pivoted on c said arm, and extending alongside said first named lever and terminating in a handle, and means connecting said levers for simultaneous operation, said connecting means including mech anism for varying the vertical angle formed between said levers whereby the relative position of the tool holder may be varied with relation to the emery wheel in a direction at right angles to said horizontal arm.-

14:. In a tool grinder, the combination with a frame and an emery wheel journaled therein, of a horizontal arm on said frame, a tool holder mounted to oscillate on said arm, a lever pivoted on said arm and connected to said tool holder, a second lever pivoted on said arm and extending alongside said first named lever and terminating in a handle, a worm wheel sector formed.

on one of said levers and a worm journaled in the other lever engaging said worm wheel sector, and means for turning sald worm.

HANS o. ELVERS.

Witnesses W. L. MILLER, H. J PARKE.

Images