US604776A

US604776A - Milling-cutter

Info

Publication number: US604776A
Authority: US
Publication date: 1898-05-31
Anticipated expiration: 1915-05-31

Description

(No Model.) 2 SheetsS.heet 1 A. H. MORTON. MILLING CUTTER.

No. 604,776. Patented May 51,1898.

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. 04 u [B a c f |E [j WITNESSES. INVENTO UNITED STATES PATENT OFFICE.

ALBERT. H. MOR'IONJOF LOlVlCLll, MASHAGHUSWNS.

CU-TTER.

SPECIFICATION forming art of I ette'rs Patent No. 604,776, dated May. 31, 1898.

' Application filed March 8,1897.

To all whom it may concern Be it known that I, ALBERT II. MORTON, a citizen of the United States, residing at Lowell, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvementsfin Milling-Gutters; and I do hereby declarefthe following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to whichit apperta'ins to make and .use the same.

'The present invention relates to millingcutters, and more particularly to that type of cutters which comprise removable and renewable blades orcutters fitted to a stock or body portion. i Y

The object of the present invention is to produce a milling cutter of simple construction' which can be easily and cheaply made and one in whichtheblades or' cutters shall be firmlyand securely held in afixed -position upon the stockfor body portion and to'so construct. the, samethat should one of theblades break in .use another could be quickly and readily substituted therefor. To the above end the present invention con-v sists of a milling-cutter constructed and arranged as hereinafter described and claimed.

The invention .is illustrated in the accompanying drawings, in which- Figure 1 shows a face view of .one form' thereof; Fig.v 2, a plan view, partially-in sec tion; Fig. 3, an end view of a modified form of the invention Fig. 4, a plan View, partially in section, of the same cutter shown in Fig. 3; Fig. 5, a plan view of another modification, and Figs. 6 and 7 detail views representing the clamping blocks and bars. v Similar-letters of reference refer to correspondir. g parts throughout the several views. In the form of the invention shown in'Fig. 1,A'represents the stock or body portion, circular in form and provided with the threaded opening a, whereby it may be secured upon Around the' stock A are-securely fastened a series .of cutters ofblades B, which are clamped in screws D. y

In order to securelyfasten the blades B in position upon the stock A, saidstock is prefposition by the blocks 0 and .erably provided with the radial. grooves or jectedbeyond one faceof the stock or .rece'sses on the blades and cutters heretofore constructed. words, the width of the blocks Serial No. 626,368. -(No 'model-) blades B fit, and the blocks 0 are made with beveled sides 0, or substantially wedge shape in cross-section, whereby when the screws D are screwed up tightly the sides c of said blocks will closely engagethe sides of blades B and will cause-them to be clamped in a firm and secure manner between the faces 0 of two adjacent blocks .0. I

If desired, the stock or bodyA may be provided with a flange,-which' is out out at intervals, as shown at e, corresponding to the seats a in the stock A, whereby projections c are formed, which projectup between the.-

blades B and form suitable back-stops to ac c'urately position the clamping-blocksBa The cutter above described is a face-cutter,

the cutting edges 1) of blades B being'pro-' body A, and as the blades wear away they may be sharpened and 'moved forward to position their cutting edges, or if one blade becomes broken it may be ground down and positioned without disturbing the other blades;

It will be noted that the clamping-blocks C form a broken ring or annulus, theinner diameter of which is greater than the outer diameter of the stock or body A, and that there-' fore. a space is left between the bottom faces of the blocks 0 and the face of the stock or body A,-whereby the blocks 0 when drawn down between'the blades B will be enabled to exert a the sides of the blades B, obviating the necessity of forming interlocking projections and blocks, as in the .In. other C relatively to the space between the "blades or cutters B is clamping contact with the sides of said blades blocks comes in contact with the'periphery of the stock or body A,'and thus the blades B. are held in position by the clamping or wedging action ofsaid blocks 0.

The blocks Care preferably provided-with countersunk recesses c to receive the heads of the screws D, so that when theparts are assembled they Will not periphery of the cutter.

In the cutter-shown .in Figs. 3 and 5 the powerful clamping actionv against project beyond the r such that the inclined faces 0 will come into or' cutters-B before theinner' face of said too 2 I eoarre blades or cutters B are arranged as peripheral cutters instead of face cutters. In this form of cutter the stock or body A is made in the form of a cylinder, preferably having along its face grooves or seats a to receive the lower edges .of the blades B, as in the device hereinbeforedes'cribed. represents wedgebars similar to the wedge-blocksO, before described, which are fitted between the blades B and drawn downward toward the stock or body A by screws D, whereby the blades B are securely clamped in position. If desired, the stock or body A may be provided at its transverse center with the projections e which are similar to the projections e of the cutters shown in Fig. 1, in which case the wedge-bars 0 would be made in two sections, the inner ends of which would abut against the said projection 6 The cutter shown in Fig. is the same as that shown in Fig. 4, with the exception that the projections e on the stock or body are omitted and the wedge.- bars made of such a length as to extend along the entire length of the stock or body.

It will be noted that the wedge-blocks and wedge-bars do not come in contact with the face of the stock or body and that therefore a powerful Wedging action is imparted thereto by the screws D and D, tending to forcibly and firmly grip the blades B and B between them, thereby obviating the necessity of providing said blades and blocks with interlocking lugs and recesses.

While I have described the stock or body as being provided with grooves or seats to receive the backs or lower edges of the blades,

and thereby more effectually secure said blades in position, it is obvious that said grooves are not essentiaL-as the lower edgesof the bladescould just as well rest upon the surface of the stock or body portion, and the clamping or wedging action of the wedge blocks or bars alone holds them fixedly in position.

\Vhile I have illustrated the blades as ra dially disposed along the periphery of the stock or body portion, I-do'not regard such specific disposition as an essential feature of the present invention, since it is evident that with slight modifications in the form and arrangement of the parts hereinbefore described the blades may be disposed tangentially or in, any required manner to secure the greatest eiiiciency.

Having fully described my invention, I claim as new and desire to secure by Letters Patent of the United Statesi 1. In a milling=cutter, the combination with a central stock or body portion comprising an integral block having threaded holes around.- the periphery and a central aperture, of aseries of cutters disposed around the periphery of said stock' or body portion, a series of removable wedge-shaped bars or blocks alternating with the cutters and screws passing through said bars or blocks and engaging the 'threaded holes in the stock or body portion,

the inner peripheral faces of said bars 'or' blocks being of greater width than the periph-'.

eral face of the stock or body portion exposed between the. cutters, whereby the bars or blocks may be caused to forcibly engage the sides of the cutters and securely hold them in position upon the stock or body portion, substantially as described. v

2. In a milling-cutter, the combination with the stock or body portion, of a series of blades disposed along the periphery thereof, a series of-fixed projections on the stock or body portion extending between the blades, and a series of clamping-blocks interposed between the blades, and arranged to be brought into clamping contact therewith,substantially as described.

- In testimony whereof I affix my signature 85.

in presence ofxtwo witnesses.

ALBERT H. MORTON.

'Witnesses:

J OHN K. WHI TIER, HENRY W. CHURCH.