US591039A

US591039A - Cutter-head

Info

Publication number: US591039A
Authority: US
Publication date: 1897-10-05
Anticipated expiration: 1914-10-05

Description

(No Model.)

B. HARRIS.

4 i Sheet" 1.

CUTTER HEAD.

Patented Oct. 5,1897

R. HARRIS."

CUTTER HEAD.

4 Sheebs-$heet 2.

(No Model.)

No. 591.039. Patented 001;. 5,1897.

4 Sheets sheet 3.

(NO Model.) 7

R. HARRIS.

CUTTER HEAD.

No. 591,039. Patented Oct. 5,1897.

(No Model.) 4' Sheets-Sheet 4,

- R. HARRIS.

CUTTER HEAD. No. 591,039. Patented Oct. 5,1897.

Nirnn RUTLEDGE HARRIS, OF CEDARFALLS, IOWVA.

CUTTER-HEAD.

SPECIFICATION forming part of Letters Patent No. 591,039, dated October 5, 1897. Application filed M rc 15, 1897. Serial No. 627,726- (No model.)

To all whom it may concern.-

Be it known that LRUTLEDGE HARRIS, a citizen of the United States, residing at Cedar Falls, in the county of Black Hawk and State of Iowa, have invented certain new and useful Improvements in Cutter-Heads for Woodworking-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to machines for producin g ornamental designs in wood by means of cutter-heads revolving in planes perpendicular to the grain of the wood; and the ob ject of the invention is to improve the construction of cutter-heads for this purpose in a manner that will hereinafter fully appear, reference being had to the accompanying drawings, forming a part of this specification, in which Figure l is a plan view of a machine for the designated purpose as in use. Fig.2, Sheet 2, is a View in perspective of my improved cutter-head an d cutters, the head in this case being made solid. Fig. 3 is a profile of the cut made by the same. Fig. at, Sheet 3, is a side elevation of a separable head embodying my invention. Fig. 5, Sheet 4, is a similar view of the same as in position on the mandrel. Fig. 6 is a view of the two halves of the head as seen from the inner sides.

Similar letters of reference indicate corresponding parts.

The machine to which this cutter-head is.

applied is of the same general nature as that illustratedand described in my application for Letters Patentserially numbered 627,728, of even date herewith, and the parts therein claimed as new are herein specifically disclaimed.

Briefly described, the machine consists, essentially, of a frame A, on which ismounted a revoluble mandrel B, driven by a belt 0 on a pulley D near one end of the mandrel. Running across the frame are two tracks E E, and on these slides a carriage F, adapted to hold the piece of wood to be operated upon. The manner of holding the stick constitutes no part of this. invention and need not be described. In a machine of this kind the construction of the cutter head and knives is of the greatest importance, since on the proper formation and adjustment of the knives depends in the greatest degree the efficiency of the machine. Hitherto it has been customary to attach the knives to inclined lugs forming the terminals of spokes radiating from the hub in a manner similar to the attachment of the knives of an ordinary planer or sticker. This construction is very satisfactory in the case of wide knives, though not so secure and safe as in the case of my improved head.

There, however, it becomes necessary to use a comparatively narrow head and knife, the common mode of attachment is not well suited to the case, and in practically all cases the head and cutters hereinafter described are better adapted to the duty required of them.

In Fig. 2 the cutter-head is shown complete with a full complement of knives or cutters. In practice any equal number of knives, from two to eight, may be used, and the pattern cut will vary accordingly. An odd number might of course be used, provided the head be properly balanced. The head G is in the nature of a disk, with a suitable hub G and set-screw G for attachmentto the mandrel. In practice it is made with fourrecesses G3 on each side to take the shanks of the cutters, which extend in radial lines, as shown. A hole G in each recess is tapped for a capscrew H, by which each cutter is attached to the head.

The cutters J J each have a shank J, fitting snugly in the recess in the side of the head, and are each provided with a slot J through which the cap -screw passes, and which allows for any desired adjustment of the cutters in or out. The cutting portions J of the cutters are formed integral with the shank, bending out therefrom in either direction to form the desired shape of blade. A characteristic and valuable feature in the formation of the blades is the projecting forward of the outermost portion of the bladethat is to say, making the outermost cutting part of the blade (the part making the deepest cnt) to stand away from the shank, so that as this part, which has the hardest service and requires the most grinding, wears away the shank itself is not weakened thereby. Thus by reference to Fig. 2 it will be seen that the part of the knife marked J is the part that cuts deepest, instead of forming the knife so that the deepest cut would come at J The cutters are all made to have a drawing out, their edges being diagonal to the axis of the head, so that the cut is made cleanly and with a paring instead of scraping action.

A further improvement in the head is shown in the figures of the two last sheets of drawings. The object is to facilitate the putting on and taking off of the head, and the construction is such that any head may be attached. to the mandrel or removed therefrom without disturbing any other and Without taking the mandrel out of the machine and the beading or molding be thus easily and quickly changed at any part of the turning.

In Fig. 4 is shown the two parts of a separable head, but so interlocked when in position on the mandrel that it may be held in place by a set-screw in the same manner as a solid head. The hub G is split on a line diagonal to the cutter-shank seat G and in one of the halves of the hub is a set-screw coinciding with a gib-seat G In one half of the head there is a projecting portion G which has an offset G9 formed therein to fit the overlapping part G of the other half. Opposite thereto an offset G is formed to take the projecting and overlapping part G The lips G and G fit into corresponding recesses G and G? and lock the two halves of the head together when placed in their proper position on the mandrel, as shown in Fig. 5. The cap-screw holes are in the same relative position as in the solid head and are tapped in the parts G and G. The construction of this head is such as to make its attachment and detachment very convenient, it being only necessary to loosen the set-screw and take out two cap-screws in order to remove any head. The interlocking of the parts of the head prevents the strain of the set-screw being brought to bear wholly on the capscrews and insures a firm and true attachment of the head to the mandrel.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination in a machine of the class specified, of a divided cutter-head having overlapping and interlocking portions coincident with some of the cutter-seats, radial seats for the cutters, cutters with shanks fitting said seats, and with cutting-blades adapted to cut most deeply at some distance from the shanks, slots in the shanks of said cutters, and retaining bolts or screws adapted to connect the separate parts of the head and the cutters fitted to said interlocking parts, as described.

2. The herein-described cutter-head, consisting essentially of a divided hub, a disk portion attached to each, and having radial cutter-shank seats formed therein, projecting, overlapping and interlocking portion of said disk, forming portions of some of said seats, and connecting-bolts adapted also to retain cutters, as described.

In testimony whereof I affix my signature in presence of two Witnesses.

- RUTLED GE HARRIS. Witnesses:

HUGH M. CARTNEY,

H. H. HARRIS.