X h hub-boring machine
US 274470 A
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Description (OCR text may contain errors)
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HUB BORING MAGHlNE. l No. 274,470. Y Patented Mar. 27,1883.
7/2272641 Www/W PATENT erica.
JOHN T. DETTERER, OF WTILLSHIRE, OHlO.
SPECIFICATION forming To all whom -it may' concern Be it known that I, JOHN T. Barranca, a citizen of the United States, residing at Willshire, in the county ot' Van Wert and State of Ohio, have invented certain new and useful Improvements in HuuBoringMachines; and Ido hereby declare the following to he afull, clear, and exact description otthe invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or iig'res of reference marked thereon, which form a part of this specification. Y
1n the accompanying drawings, Figure l is an elevation of the apparatus. Fig. 2 is a top plan view of the same. Fig. 3 is a like view, the chuck andadjusting-sleeve being removed. Fig. 4 is a section on line an .n of Fig. 1, and Fig. 5 is a perspective `View ofthe cutterhead and cutters.
Like letters ot reference indicate like parts in the above-described iigures of drawings.
The object ot my invention is to provide means for accurately boring or boxing hubs, and for boring holes or' varying diameter, or
for boring -holes that aretapering from end toV end, or that gradually increase in diameter from one end of the hub to a point near the op posite end, and are of uniform diameter from the latter point to the opposite end of the hub.
The invention has for its further object to provide means whereby a clean cutand smooth here is obtained with less power than is usually required in Stich machines. y
To these ends the invention consists in the construction and combination of devices, substantiall y as hereinafter fully described.
In the drawings, F indicates the cutterframe, composed of cross-barsj'j" and longitudinal slotted guide-bars F F'. The guidebars F F' are provided at opposite ends with screw-threaded lugs or tenons ffz, by means of which and the nuts N N thesaidguide-bars are secured to the cross-hars.
In order toadapt the apparatus to eut a hole of any desired diameter, theguide-hars F F' are madeadjustahle laterally on the cross-bars ff', which latter are provided with slots s s, through which the tenons of the guide-bars F pass, so that on loosening the nuts n the said part of Letters Patent No. 274,470, dated March. 27', 1883.
` Application iled January 23, 1883. No model.)
hars may be moved in and out on the crossbars to adapt the cutters to cut a hole of the desired diameter.
R is a screw-,threaded rod, that serves to move or feed the cutter-head and cutters along the guide-bars. The rod is centered in a mandrel or actuating-rod, M, that serves to rotate the cutter-frame and cutters. To this end the upper cross-har, j', has a central screw-threaded aperture, into which screws the operatingrod orfmandrel M, its lower end having a conical seat for the reception ot the conical bearing formed on the upper end ot the screw-rod R, said rod passing loosely through a central openingin the lower cross-bar, f. lt is obvious that if the rod Mis rotated,either by pulley and belt from a suitable motor or by hand through the medium of a crank or the handle h, the frame will rotate with it, while the screwrod R will remain stationary.
The cutter-head H consists of a square block, in the opposite sides of which are formed dovetailed or other grooves g, for the reception ot' the shanhs c of the cutters C. The cuttingedge 2 ofthese cutters is slightly rounded and made to incline inwardly from the cuttingpoint l to the enlarged bearingsurface c ot' the shank, the cutter being broadest at its f outer horizontal edge, 3, said edge being also made to incline rearwardly from the cuttingpoint l. By means ot' this construction the cutters will cut across the grain of the woodthat is to say, they will cut nearly at right angles to the grain-and not only make a clean eut and smooth bore, but it will also require much less power to operate the cutters.
The shank c of the cutters C' have a flat bearing-surface, c', provided with an aperture for the reception of a set-screw or equivalent device, such as a holt, B, and nut n, said bolts passing loosely through the slots S of the guide-bars F', and serve to guide the cutters along the slots. The shank c of the cutters C lis dovet'ailed'and fits into the like groove g of the cutter-head, wherein it is held against lateral motion, said cutters heilig held against bearing for the chuck D, and K is a tightening-nut, that serves to tighten up the chuck D'.
When the hub is properly centered on the apparatus, as shown in Fig. 1, the cutter-frame may be rotated by hand and the hole in the hub reamed out to the proper diameter or taper; or the apparatus as constituted may be mounted in suitable supports and the cutterframe rotated by hand or other suitable power.
If it is desired to bore a hole of uniform diameter, a cutter-frame having parallel slotted guide-bars is employed, and for boring holes ot' graduallyincreasing diameter a cutterl'rame having straight guide-bars arranged accordingly is employed.
As shown in Fig. I of the drawings, the apparatus is adapted to ream ont a hole ot' uuil'orm diameter for a portion of the length of the hub A, and from that point said hole is of a uniform taper to the opposite end of said hub A. To produce such a hole the side bars of the frame and the guide-slots therein are ot' the desired form, said bars and slots being parallel to each -other for acertaiu distance oi' their length, as at f3, from which point to thc cross-barf the bars and slots gradually approach each other.
Having now described my invention, what I claim isl. In a hub-boring machine, a rotating cutter-frame composed ot' guide-bars for guiding the cutters, and cross-bars, with which said guidefbars are connected and ou which they are laterally adjustable, in combination with a screw-rod and adjustable cutters having a combined rotary and rectilinear movement on said rod with and along said frame, substautially as and for the purposes specied.
2. In a hub-boring machine, the combination ot` screw-rod and a rotating' cutter-frame with a cutter-head andcutters having a combined rotary and rectilinear movement with and along said frame on said screw-rod, substantially as and for the purposes specified.
3. In a hub-boring machine, the combina tion of an eXpansible cutter-frame, correspondn ingly adjustable cutters, a screw-feed for imparting rectilinear motion to the cutters along the frame, and means, substantially such as described, for rotating the cutter-frame and cutters, substantially as and for the purposes specified.
4L. The combination, in a hub-boring machine, With the cutter-frame F, composed of the slotted side bars, F F', and slotted crossbars fj", the cutter-head I-I, and cutters C, adj ustable thereon, of the screw-rod It, operating-rod M, and chucks D D', substantially as described, for the purposes specified.
5. The combination of the slotted lside bars, F', of the frame F and the rod R with the cutter-head I1, having dovetailed grooves g, the cutters C, having dovetailed shanks, and the set-screws or bolts B, substantially as described, for the purposes specified.
6. The combination, with the frame F, the cutterhead and cutters, the chucks D D', and rods It M, ot' the adjustable collar E and nut K, all arranged for co-operation substantial] y as and for the purposes specified.
7.'The frame F, composed of side bars, F', having slots S and tenons f2, the cross-bars ff', having slots s, and the nuts N, in combination with the rod It, the cutter-head I'I, hav ing dovetailed grooves g, the cutters (l, having dovctailed shanks, and the boltsB and Witnesses J. H. Sins, lsRAEL REMPP.