US476563A - Cutter-head - Google Patents

Description

(H0 model J- 3 Sheets-Sheet 1.

' S- J. SHIM'ER.

CUTTER HEAD.

No. 476,563. Patented June 7, 1892.

(No Model.) 3 Sheets-Sheet '2.

S. J. SHIMER.

CUTTER HEAD.

No. 476,563. Patented June 7, 1892.

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(No Model.) 3 Sheets-Sheet 3.

S. J. SHIMER,

CUTTER HEAD.

No. 476,563. Patented June 7,1892.

.FJ'E 5. 7 0 m @Wtmeooeo UNTTED STATES ATENT FFICE.

SAMUEL J. SHIMER, OF MILTON, PENNSYLVANIA.

CUTTER-HEAD.

SPECIFICATION forming part of Letters Patent No. 476,563, dated June 7, 1892.

Application filed October 3, 1891.

To all .whom it may concern.-

Be it known that I, SAMUEL J. SHIMER, a citizen of the United States of America, residing at Milton, in the county of Northumberland and State of Pennsylvania, have invented new and useful Improvements in Cutter-Heads, of which the following is a specification.

My invention has relation to improvements in cutter heads usually called matcherheads and of that class mounted on a vertical spindle and carrying upper and lower cutter-bits adapted for tonguing or grooving boards.

The present invention has for its primary object to adapt a circular-bit matcher cutterhead of the expansion variety or class to receive circular bits. In Letters Patent No. 293,529, of February 12, 1884, there is shown a vertically-expansible cutter-head carrying straight bits; but I have found it impossible to adapt and utilize this principle and means of expansion to a cutter-head carrying the preferred circular bits until the present invention was conceived and perfected and not until I conceived the particular form of the bit having an integral clamping-bolt, the advantages of which construction will be fully set forth hereinafter.

I have fully and clearly illustrated my invention in the accompanying drawings,where Figure 1 is a side View showing the cutterhead equipped with circular bits for cutting the tongues on boards. Fig. 2 is a central vertical section through the several parts or elements. Fig. 3 is a perspective of the upper section or bed-piece of the cutter-head on which the bit-seats for the bits cutting the upper carve of the tongue are formed and the intermediate openings for the bits on the other sections. Fig. 4 is a perspective of the lower section of the cutter-head, showing the radial flanges for bit-seats for the lower cutting-bits and the intermediate openings for the other bits. Fig. 5 is a view of my im- Serial No. 407,638. (No model.)

of a hub or stem 1 to receive the spindle, having projecting radial flanges b 0 (Z extending from the base, on the upper face of which are formed bit-seats 2, between which the metal is cut out, preferably in circular shape, as seen at 3, constituting openings, into which the oppositely-arranged bits of the other section project, as shown in the drawings. In the bit-seats are bolt-holes a to take the stems of the bits. About the base of the hub 1 is formed an annular groove 4, forming a seat for the expansion-spring. The hub is screwthreaded, as seen at 5, to take the threaded adjusting nut or ring and the top cap-nut, hereinafterdescribed. In the corner of each of the flanges is a guide-pin 6, and in the opposite corner of each flange is a pin-hole 7, the former entering a pin-hole 8 in the upper section of the head and the latter reeeivinga guide-pin 9 in that element. These pins not only serve to guide the sections in their relati ve positions, but also serve to maintain that relation when any adjustment is being made and also keep the parts from moving upon each other in either direction. In the hub is a slot 10, which takes the end of a threaded bolt 11, projected through the shell of the other section. The vertical adjustment of the parts is limited by this bolt and slot, so that the parts cannot be operatively separated beyond the limits of the slot. About the hub 1 is arranged the expansion-spring 12, seated in the annular groove 4 at the base and having its upper part seated and bearing in an annular groove 13 in the opposite section, substantially as shown.

B designates the upper section of the cuttor-head. This consists of a substantial conical-shaped sleeve 14, having a bore to fit and take the hub of the other section and having the metal at the base formed with radiallyprojected flanges e f g, on the under face of which are formed bit-seats 15, in which are bolt-holes 16 to take the stems of the bits. The bolt-holes in the bit-seats of each section are formed tapering for a portion of their length, as shown, so that the bits may be more firmly clamped to the head on the seat, and thus prevented from turning on their seats. Between the flanges of the part B the metal is cut away, as seen at 17, forming circular openings, into which project the bits of the other section, as shown in the drawings. As heretofore mentioned, in the corners of the flanges of this section are placed pins 9, and in the opposite corners are pins-holes, which engage and take pins and holes of the lower section, and the threaded bolt 11 is projected through the shell of the sleeve of this section to take in the slot 10 of the hub of the lower section, and the annular groove 1 3 takes the upper end of the expansion-spring. The top end face of the sleeve 1a is formed with V-shaped or circular projections 18 to engage with corresponding formations on the lower face of the adjusting-ring O. This adjustingring is interiorly threaded to engage the threads of the hub 1, so that by turning the ring the section B may be vertically adjusted in either direction and the ring held in place by the intersection of these indented faces. These means for adjustment are substantially identical with the means set out in Letters Patent heretofore cited and of course do not enter in the present invention, except as they may form parts of legitimate combinations with my improvements. On the hub 1 is fitted a threaded clamping-cap 19, having a threaded hole 20 in its top, which takes a threaded bolt 21, the end of which bears on the end of the spindle,(not shown,) by means of which the whole head may be adjusted to the proper vertical position on the spindle. The cap 19 is held against displacement by means of small setescrews 22, let through it and into hub 1, bearing with their inner ends against the spindle, as indicated in Fig. 2 of the drawings.

D designates my improved circular cutting,

bit. The bit portion of this may be of any of the usual approved forms of circular bits with the usual notch made for tonguing or grooving boards. This circular bit is formed with a solid bottom 23, from the under face of which projects the clam ping-bolt 24, formed integral with the bit. The lower portion of the clamping-bolt is provided with. screwthreads to take a nut 25, as seen in Fig. 5 of the drawings. The neck or upper part of this bolt is tapering, as at 26, to fit in the tapering hole of the bit-seat and make a tight, secure, and strong union of the parts. These bits, having the bolts integral therewith, can be made much smaller than bits having center holes in them, and it is due to the improved construction, enabling me to make the bit of small dimensions, that I adapt the expansion principle to a head having circular bits in their equipment. A circular bit made with a bolt-hole and small enough to apply to use on an expansible head, as represented in the drawings, the bit being shown full size, would be so frail at the notched side that it would crack during the process of tempering and be rendered useless, since experience proves that bits of larger size with bolt-holes often break while tempering. Hence this bit with integral bolt is an improvement in construction which enables an expansion matcher-head with circular bits to be efficiently and operatively equipped with these preferred bits. By the construction and arrangement of the sections of the head, so that the lower-cut bits are carried on the bottom face of the upper section of the head and the upper-cut'bits on the upper face of the lower section thereof, the flanges can be made much thinner, saving metal, and at the same time made narrower, with bit-seats of smaller diameter. The projecting walls of the bits, extending into the spaces of the flanges, also receive support by the walls of the spaces.

By reference to the drawings it will be observed that the eXpansibilit-y is limited, and purposely and definitely so, to prevent an overlap of the bits in the wrong direction, since the upper-cut bits are on the lower section of the head and the lower-cut bits on the upper section thereof. Hence when the adjusting nut or ring is turned down the flanges, rims, or bit-seats are closer together and the tongue or groove made wider; but on turning the nut upward the spring forces the upper section upward,causing the clearance between the bits to be narrower, and consequentlyforming a narrower or thinner groove or tongue.

The assemblage of the parts may readily be perceived from the description and in connection with the drawings; but the arrangement of the parts may be here rehearsed. The expansion-spring is arranged on the hub of the lower section, the top section then put on the hub, the adjusting ring or nut screwed down, and then the cap screwed down in place and secured by the small set-screws at its base. The bolt in the upper section is then screwed in to enter the slot in the hub, and then the bits may be set, adjusted, and fixed in place.

Having thus described my invention, what I claim is 1. A circular bit for a cutter-head, consisting of a bit and a threaded clamping-bolt integral with each other, the clamping-bolt being formed with a tapering portion between the threaded ends and the bottom of the bit, substantially as described.

2. In a cutter-head, the combination of a lower section consisting of a central threaded hub formed at its base with radially-projecting flanges having bit-seats on their upper faces and circular openings between the flanges, into which the bits of the upper section project, an adjustable upper section consisting of a sleeve to fit the hub of the lower section and formed at its base with radiallyprojecting flanges having bit-seats on their under faces and circular openings between the flanges, into which the bits of the lower section project, and means for adjusting and holding the upper section, substantially as described.

3. In a two-part cutter-head, the combination of a lower section adapted to carry the bits to make the upper carve of the cut and an upper adjustable section adapted to carry the bits to make the lower carve of the cut, bits on the lower section, and bits on the up per section intermediate of the others, substantially as described.

4c. In a cutter-head, the combination of a hub having radial flanges at its base, circular bits on the flanges, and circular spaces between the flanges, an upper adj nstable section fitted on the hub of the lower section and formed with radial flanges, and circular spaces between the flanges to take in the bits on the lower section, and bits on the under face of the flange of the nppersection, arranged to proj eet in the spaces between the flanges of the lower section, substantially as described.

SAMUEL J. SHIMER.

Attest:

JOHN A. BECK, W. H. BECK.

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