US363753A - Fourth to david wilson - Google Patents

Description

(No Model.)

J. B. MAHAPPEY.

' CUTTER HEAD.

No. 363,753. Patented May 24, 1887.

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*UNITED STATES PATENT OFFICE.

J AMFS B. MAHAFFEY, OF BALTIMORE, MARYLAND, ASSIGNOR OF ONE- FOURTH TO DAVID XVILSON AND FIB'EN B. HUNTING, BOTH OF SAME PLACE.

CUTTER-HEAD.

SPECIFICATION forming part of Letters Patent No. 363,753, dated May 24, 1857.

Application filed November 30, 1856.. Serial No. 220,253.

To aZZ whom it may concern:

Be it known that I, JAMES B. llIAHAFFEY, a citizen of the United States, residing at Baltimore, in the State of Maryland, havein vented certain new and useful Improvements in Outter-Heads for Flooring-Machines, of which the following is a specification.

The improvedcutter-head which is the subject of this invention is employed in planing and matching machines to produce from one board two tongued boards, such as are com monly used for flooring, ceiling, and Wainscoting, and is an improvement 011 the cutter-head shown and claimed by mein Patent No 321,378, of date June 30, 1885.

In the drawings herewith, which illustrate the invention, Figure 1 is a perspective view of the improved cutter'head. Fig. 2 is a view of one of the blades for cutting two tongues as it appears when separated from the head. Fig. 3 is a view showing the'inclined sharpening-face ofa tongue-cutter blade. Fig. 4 is a cross-section of a board, and shows the position of two tongues formed on a board by the tongue-cutter as said tongues would appear previous to separation by the dividing-blade.

The body A of the cutter-head has an eye, I), for the mandrel or shaft, (not shown,) to which latter the cutter-head is to be secured in any well-known manner. The body has four projecting rectangular sides, two of which are diametrically opposite each other, and are designated by the letter 0, and the other two, which are also diametrically opposite each other and between the two first mentioned, are designated by the letter (Z. A right-angled notch, e, is between and separates each of the sides 0 from the adjacent side, cZ. Each side 0 d has on its peripheral edge a straight blade-groove, f, which extends in a line with the plane of rotation, and each side is also provided with transverse holes 9 for the bolts 71, by which the blades are secured.

Each tongue-cutter I is designed to cut one side of two wood tongues. This cutter consists of a straight body having one side attached to a flange, 70, which is provided with bolt-holes h. NVhen the tonguecutter I is attached to the body A, the flange 7r, which serves as a shank, occupies a groove, f, in one (No model.)

of the projecting sides 0. On its peripheral side the tongue-cutter has a straight central bead, Z, and each of the remaining two sides of the body has a longitudinal angular swell or bulge, m.

The letter a designates the two cuttingedges, which are in line with each other, and cut away the wood to form the tongue, which lat terhas a slightly-inclined face, as shown in Fig. 4, This cutting-edge is formed by the beveled or inclined sharpeuiugface n, and the end of the central bead, Z, forms a rabbet-cutter, Z. By applying this inclined face to a grinder or stone the tongue-cutter may be sharpened. Each tongue-cutter has two cutting-edges, n, and a central rabbeter, Z, divides or separates these two edges. The rabbeter unites with each cutting-edge a by an inward curve, a". Vhen the cutter is cutting the wood to form the two tongues o, the rabbeter Z forms in the wood a groove, 19, (see Fig. 4,) where the said two tongues are to be separated; and, it will be seen, the said inward curves n produce in the wood rounded corners or edges p where the groove is formed. Thus when the tongues are separated along the groove 19 they will have a smooth and rounded edge.

An important feature in thetongue-cutter is the angular side swells or bulges, m. These produce on the sharpeningfacen, at each side of the cuttingedges a, a spreading edge, q, and then from the broadest part of the bulge m a contracting edge, 1".

In operation cutting-edges at three sides of the tongue-cutter act on the woodthe edge a and the two side spread edges q. It will be noticed as the board is fed to the cutter the edges n and rabbets Z first strike the board; but as the cutter revolves and the board is fed to the same the edgesq of the cutter are brought in contact with the board, so the opening is enlarged to the width of the cutter at m; and, owing to the rotary action of the cutter in connection with the longitudinal feed of the board, the sides of the openings are so brought in contact with the cutters that the said sides are slightly inclined to the bottom thereof. By having the two side edges 1 to spread away from the cutting-edge a, as shown, the cutter clears itself in the wood on its upturn, and by having the contracting edge 0" all choking and burning of the tool is avoided. These are important results.

Two tonguecutters, I, and two dividingblades, S, are employed. In operation, the dividing-blades out along the groove 1), which is formed by the rabbet-eutters Z, and thus divide the one board into two tongued boards.

Having described my invention, I claim and desire to secure by Letters Patent of the United States- An improved cutter-head having the projections (1 d and c c on opposite sides thereof, with grooves f on their peripheral edges and openingsg in their sides, and provided with tongue- JAMES B. MAHAFFEY.

Witnesses:

J OHN E. MORRIS, JNo. T. MADDOX.

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