US337491A - William h - Google Patents

Description

(No Model.)

W. H. GRAY PRBSSER BAR FOR PLANING MACHINES.

No. 337,491; Patentd Mar. 9. 1886.

Iwezzr NMED STATES Pnrer FFlCE.

WILLIAM H. GRAY, OF BROOKLYN, ASSIGNOR TO THE GLEN COVE MACHINE COMPANY, (LIMITED,) OF GREEN POINT, NEW YORK.

PRESSER-BAR FOR PLANiNG- IVIACHINES.

{SPECIFICATION forming part of- Letters Patent No. 337,491, datedMarch. 9, 1886.

Application filed January 13. 1886. Serial No. 188,443. (No model.)

To aZZ whom itmay concern:

Be it known that 1, WILLIAM H. GRAY, of Brooklyn, in the county of Kings and State of New York, have invented a new and useful Improvement in WVood-Planing Machines, of

which the following is a specification.

My invention relates to that class ofplaningmachines in which are employed upright spindles carrying side-cutter heads for edging or IO grooving boards orlumber. In such machines the upright spindles of the side-cutter heads are ordinarily supported in frames which are adjustable toward and from each other, and which are surmounted by head-plates, over 1 5 which the lumber passes as it is operated upon by the side-cutters. To these head-plates are ordinarily attached edge-guides for the boards,

which are placed slightly rearward of the sidecutter heads, and to these edge-guides are adjustably secured top guides, under which the edge portion of the board or plank passes as it is subjected to the side cutters. When the lumber operated on is knurly or crooked in grain, the grooving which is performed by the side-cutters is apt to be out of the center or crooked; and the object of my invention is to provide for properly holding the front end of the lumber down prior to the. commencement of the grooving operation by the side-cutters,

and also to hold it down at a point beyond or rearward of the sidecutters.

The invention consists, essentially, in the combination, with the side-cutter heads and spindles and the head-plates above which the 5 cutter-heads operate, of top guides which are supported at their rear ends upon the headplates, and which extend forward to or beyond the center of the side-cutter heads. Such forward extension of the top guides serves to hold which are supported upon the upright spindles B, and these spindles are journaled in bearings a, which are formed in or upon upright frames 0. These upright frames U are surmounted by head-plates 0, above which the cutterheads A operate.

I have not thought it necessary to show the lower portions of the side-cutter frames 0, as they may be similar in construction and arrangement to the corresponding parts shown in Letters Patent No. 315,406, granted April 7, 1885, to Gray and Hutchinson.

The frames O, which support the side-cutter spindles B, may be adjusted toward and from each other upon a bar, D, which extends transversely to the machine, by screws, as shown in the aforesaid patent.

H H designate the chip-breakers, which are employed in connection with the side-cutter heads A, and which are represented best in Fig. 3. One of these chip-breakers, H, is ad-- justable by means of a screw and slot, bb, and is pivoted at b", as shown in the aforesaid patent. The other chip-breaker, H, is attached to the rear end of the side guide, I.

Upon the head-plates O O are secured edgeguides E, which are best shown in Fig. 1, but also in the other figures, and to these edgeguides l are attached top guides, F," which overlap the upper side of the board or plank at the edges, and serve to hold it down in proper position upon the bearing-surface c of the head-plate 0. As here shown, the top guides, F, are tongued and grooved into the adjacent faces of the edge-guides E, and are adjustably secured by bolts (1, passing through slots at in them.

The novel featurein the construction of the top guides, F, consists in their being prolonged forward to a point at or beyond the center of 0 the cutter-head A, as is best shown in Figs. 2 and 3. The bottom surface of the top guides,

F, is curved upward at their forward ends, as shown in Fig. 2, so as to enable the board or plank to enter readily beneath them and to 5 prevent its striking their forward edges.

In grooving knurly or crooked timber the grooves will sometimes not be straight in the edge of the plank or board, and the object in prolonging or extending the top guides forx00 ward to a point at or beyond the center of the side-cutter heads A is to enable the forward end of the board or plank to enter beneath the top guides before the side-cutters commence their operation upon its edges, and this eonstruetion of the top guides insures thestraight grooving of such knurly or crooked timber.

, I am aware that it is not new to employ in connection with top guides which are beyond or rearward of the side'cutter heads separate top guides or foot-pieces'which are attached to a bar on the top-outter head; but this is objectionable, as the top-cutter head is sonieti mes strained by the operation of the top guides in holding down the lumber. The extension of the top guides, which are supported at their rear ends upon the headplates O, to a point at or beyond the center of the sidecutter heads enables the lumber to be properly held down at the commencement of the grooving operation, and accomplishes this useful result without any straining of the top-cutter head, as is liable to occur when separate top guides are attached to its cross-bar.

The top guides, F, may be considered as supported on the head-plates G, although they are directly attached to the edge-guides E.

What I claim as my invention, and desire to secure by Letters Patent, is-

In a wood-planing machine, the combination, with the side-cutter heads and spindles and the head-plates, above which the cutterheads operate, of top guides, F, supported at their rear ends upon the head-plates and extending forward to or beyond the center of the side-cutter heads, substantially as and for the purpose herein described.

WM. H. GRAY.

'Witn esses:

G. HALL, FREDK. I-IAYNEs.

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