US381092A - Machine for grooving bit blanks - Google Patents

Description

`(No Modemy J. SWAN.

No, 381,092:l

MACHINE POR GROWING BIH.1 BI..\NK'S.l K Y flatented Apr. 10. 1888.22, n y f s sheetsvsheet-zQ j'.

'I EN Il0 .lfu'Y IW INI" .NIW

(No Modeln.) 4 I 3 Sheets-Sheet 3. l J. SWAN.. i i f MAGHINE- FOR GROOVING BIT BLANKS.l

10,331,092, aten-@MPL10,1388;

v lUNITED SrATEs PATENT GFFICE.;

JAMES swAN, or snYMoR, CONNECTICUT.

` v MACHINE FCR 'CROovlNc Bi-TFBLANKS.

SPECIFICATION formingfpart of Letters Patent ].\l'cz.3 81r,092`l dated April 10,1888. Y l Application filed January 26, 1888. i Serial No. 261,973.` (No model.) 4 Y To all it may concern.-

Beit known that I, JAMES SWAN, a citizen of the United States,'residing at` Seymour, inthe county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Machines for Grooving Bit-Blanks; and I do hereby declare the followi y ing to be a full, clear, and exactdescription of theinvention, such aswill enable others skilled 1c kin the art to which it appertains to make and v use the same.' y f My invention has for its object to produce a machineof vthis class which shall be simple in construction yand adjustment, durable, and

' I 5 which will produce the bestof Work ata greatlyincreased rate-of speed.. f

With these endsin view I havedevised the novel construction of which the following de:

scription, in connection' with-the accompanyi zo ing drawings, is a specification,- numbers being ...used to denote the several parts. y

Figure 1 is a plan view ofthe machine complete; Fig. 2,r a rearjelevation thereof; Fig. 3, an elevation of a cutter -and hinged journal- Y box detached; Fig. 4, an inverted. plan viewy corresponding with Fig. 3 Fig.. 5, a .cross-sec'` tion on the line fr a; in Fig. 3, looking 'toward the 1eft5andFig. 6 is a view of a double-ended blank as grooved by the machine. 1 i

3o 1 denotes the bed of the machine, a portionof which is raised above the other portion,` formingV upper and lower planes, the purpose of which w11l presently be clearly. understood, and 2 denotes the legs by which it is supported.

3-5 The bed is preferably made 'circular in-form, l.

as shownin the drawings, and is provided at l its. frontend with an extension, 3,l which may be made integral therewith or cast separately andy attached thereto.

4o y4 denotes the blank to be operated upon,

which is carried by a chuck, 5, at the. end of a-scr'ew, 6, passing through a stationary nut or box, 7, at the forward end of the extension.

In the present instance I have shown the -`blanks Vas fed forward by a'hand-wheel, 8, al-

though in practice .I contemplate making the feed automatic. As the blank is fed forward it passes'into a guide, 9, upon a plate, 10,

o which is adjustably and detachably secured to 5o extension 3, as shown.

11 is astop carried by plate 10, which is shown in dotted lines YinvFig. ,1, to limit the forward movement of the chuck when the blank has been thrown far enough forward so thatthev cutters sh all have made grooves of the required length therein.. y

The .rear end of Ythe guide is made ,coneshaped and is cut .away obliquely, 'asindicated in Fig. 2, to enable the cutters tooperate upon the blank. It should be .understood that the .blank fits closely enough in the guide' so' as to he held against any lateral movementpduring -adapted to swing over toward the right, as

the operation of thecutters. A diffcrentsi'zed guide yisof course used for .each-sized ,blank that is operated upon. suitable construction may be used, it/jbeing simply lrequired thaty the chuck Vshall act quickly,preferably by a screw, 12, and shall hold theblank firmly lWithout marring it.'Y In practice one endof theblank'is fed forward to the cutters' andv operated upon, then the Any lathe-chuckrfof grooved end is insertedin the chuckand they A opposite end grooved.'v Theblank is then cut Vin two, and the other processes of forming the completed auger, bit, or gimlet are proceeded '13 denotes the cutters,which are carriedr by y i shafts 14, journaled in boxes 15.

16 and 17 denote,- respectlvely,fnutsifand endwise adjustmentis given to said'shafts, itA

being of course understood that thefcutters are'v changed for each size of blank and thatthe adjustment of said cutters 'must be absolutely accurate.

shaft. As the cutters operate upon opposite sides of the blank, .it will ofA course' be understood thatoneeof the belts musthe crossed, ,so i.

that the cutters vwill rotate. in opposite directions'. In order that I Amay causeth'ecutters tocut the grooves at any desired pitch,"and in orderthat they may bethrown from'their oper` ativeposition the instantgthe groovng oper! Y ation is completed, Ihinge the outer'ends of the boxes 15, in` which 'the cutter-shafts`are f .journaled,to `blocks 19, having tongues20,

VVloo radapted to`slid'e in grooves 21 at the opposite Y i edges of` the bed, -as vclearlyshowninl Fig.`2. I..

check-nuts on shafts 14, whereby thejdesired 1 5 bolts which pass through each block are locsened, the blocks adjusted, and the bolts are then tightened up again. In order to hold the cutters in operative position in use, .I preferably employ weights 23 and 24. Veight 23 is of the upper cutter-shaft box, its action being simply to draw the upper cutter down to its operative position and hold it there. Weight 24-is suspended from the outer end of a lever, 26, which is pivoted to one of the legs, and its inner end connected to a rod, 27, the upper end of which bears against the under side of the lower cutter-shaft box acting to raise said lower cutter to its operative position and hold it there. The lower ends of rods 25 and 27 are connected by means of eyebolts 28 to alever, 29, pivoted midway between them to a rigid rod, 30, depending from the bed of the machine.

z5 31 denotes a feedlever pivoted to a bracket secured to one of the legs. The forward end of this lever bears upon the underside of lever 29, so that when the foot-lever is pressed down its forward end is raised, raising one end of lever 29, which carries weight 23 upward, and by means of rod 25 raises the upper cuttershaft box and carries the cutter out of operative position. It is of course apparent that the opposite end of lever 29 will 'be moved downward, which will draw rod 27 downward against` the power of weight 24 and will allow the lower cutter-shaft box to drop downward slightly, carrying thelower cutter out of operative position. The depth of the groove cut in the blank is regulated by means of setscrews 32, there being two set-screws provided for each cuttereshaft box, as clearly shown in Fig. 1. The set-screws for adjusting the upper cutter-shaft and cutter pass through lugs 33 upon the box and their points bear against the bed of the machine, thereby limiting the downward movement of the box, shaft, and cutter. The set-screws for adjusting the lower cutter pass through a bracket, 34, and their go ends bear against lugs 35 upon the sides of the lower cutter-shaft box.

36 denotes plates upon the bed,each ofwhich is provided with a set-screw, 37, the point vof which bears against one of the cutter-shaft ,5 boxes and acts to overcome any tendency of the boxes to spring out of position in use,and at the same time preventing any strain uponv the hinged connections of the boxes.

In 'use the blank is placed in the chuck, as

'o already described, and is fed forward through the guide to the cutters either 'automatically or by hand, as shown. The instant the chuck comes in contact with stop ll the operator places his foot on foot-lever 31 and throws both 5 of the cutters out of operative position, as already described. The chuck and blank are then withdrawn, the blank is changed end for carried by a rod, 25, pivoted to the lower side v end in the chuck, or a new blankis inserted, and the chuck is ready to be fed forward again, as before. The instant the operators foot is removed from foot-lever 3l the cutters dropback to their operative position. It will be seen that no clutch or belt-shifting mechanism is required, there being no necessity for stopping the cutters until a change is made in the class of work.

It will of course be understood that the various detailsof construction may be greatly changed without departing in the slightest from the principles of my invention.

1. The combination, with a chuck for carrying the blank and a guide to receive the blank, of groovingcutters on opposite sides of the guide, shafts therefor, and hinged boxes for said shafts which permit the cutters to be thrown out of operative position without stopping their movement.

2. In a grooving-machine,t11e combination, with a guide for the blank, of cutters on opposite sides thereof and arranged oblique] y thereto, shafts for said cutters, and hinged boxes for the shafts.

3. A machine for grooving bit-blanks, consisting, essentially,of a chuck for carrying the blanks, having axial rotation as it moves forward, a guide to steady the blanks, cutters which groove the blanks, and hinged journalboxes for said cutters,which permit them to be moved into and out of operative position.

4. In a machine for grooving bit-blanks, the combination, with the cutters and shafts therefor, of boxesin which said shafts are journaled, and sliding blocks to which said boxes are hinged, whereby the pitch at which the grooves are cut may be regulated.

5. A circular table having grooves in its opposite edges and blocks adjustable in said grooves,in combination with grooving-cutters, shafts therefor, and boxes for said shafts,which are hinged to said blocks, as and for the purpose set forth.

6. The combination, with the cutters, their shafts, and hinged boxes therefor, of weights acting to hold the cutters in operative position, and rods, levers, and a foot-lever, substantially as described, whereby the power of the weights may be overcome andthe cutters thrown out of operative position. 7. The bed, extension, chuck, and cutters, substantially as described, in combination with an adjustable guide secured to the extension and a stop carried by the guide, which limits the forward movement of the chuck, as and for the purpose set forth.

8. The combination, with the chuck, guide, and cutters, of hinged boxes in which the cutter-shafts are journaled, means, substantially as described, for holding the cutters in operative position, and set-screws 32, whereby the depth of the cut may be regulated. Y

9. The circular bed having upper and lower planes and grooves 19 in the edges thereof, in combination with upper and lower cutters,

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shafts and boxes therefonand blocks adj ustf` boxes therefor hinged to said blocks, lugs upon the. upper box, and set-screws passing through them and engaging the bed to regulate the depth of cut ofthe upper cutter, and a bracket, 34, having set-screws passing through it and engaging lugs upon the lower box, whereby the depth of cut kof the lower cutter is'regulated. f t

11. The upper and lower cutters, shafts, and boxes therefor, in combination with a'rod and weight hinged to the upper box, a vrod controlled by a weight bearing against the lower box, a pivoted lever, 29, to which both'rods are 2oy *y Y pivoted, and a foot-lever adapted to engagelever 29 to raise the rod pivoted to the .upper boxH and lower thev rod` bearing against thek under box, whereby-the cutters are thrown lout of operative position.

12. The bed, sliding blocks, cutters, shafts,l

and hinged boxes, in eombinationwith plates P ventvlateral movement of the cutters vin use,

In testimony whereof I affix my presence of two witnesses.

Witnesses;

' A. M. WoosrER,

36 and screws 37, `engaging` the boxes to. pre-- i signature inf 3o JAMES SWAN. i f i

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