US477201A - Wood-cutting machine - Google Patents

Description

(No Model.)

B. DAMUS.

WOOD CUTTING MACHINE.

Patented Jun 21, 1892.

[77 an for UNITED STATES PATENT OFFICE.

BENNO DAMUS, OF CINCINNATI, OllIO.

WOOD-CUTTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 477,201, dated June 21, 1892.

Application filed June 5, 1891. Serial No. 395,176. (No model.)

To alt whom it may concern.-

Be it known that I, BENNO DAMUS, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Im provements in IVood-Cu ttin g Machines; and I do 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, reference being had to tho accompanyingdrawings, and to the figures of reference marked thereon, which form a part of this specification.

This invention relates to a machine to be used for the purpose of reducing wood in the shape of logs or timber to board or veneer form. The reduction here in view is accomplished by cutting with a knife, and for this reason is confined to boards of limited thickguide-roller, taken on line 4 4 of Fig. 1.

Sis an inclined track, upon which a carriage 9 travels with a reciprocatory movement. It carries a number of suitable headblocks 10, with suitable clamping devices 12, which hold the timber in position while being reduced. These head-blocks are provided with stationary nuts 13, through which screw-shafts 14,provided with bevel-wheels 15,

' pass. Another shaft 16 runs lengthwise with as a support for the knife 20, which is secured to two extensions 21, projecting out from that side of the frame which faces the carriage and located in such a position as not to be in the path of the traveling log. The knife is of a shape most plainly shown in Fig. 4 and is secured to these projections in a manner that its cutting-edge stands out somewhat farther and closer to the log than its rear edge, so that the former is the only part of the knife which touches the log, and by which arran gem ent the friction is avoided which would be caused if the log while passing would through its entire length touch fully the flat surface of the knife-blade and rub continually against the entire width of the same. Somewhat in advance of the knife is located a roller 22, turning around shaft 28, j ournaled in bearings 24, which latter extend out from the top and bottom of the main frame. The carriage may be propelled by any suitable motor and connected to it in any suitable way. In the case under consideration a so-called shotgun feed is used, which consists of a steamcylinder 25, containing a piston, the movements of which are controlled by a suitable supply-valve, the piston-rod 26 being connected to a downward extension 27 of the carriage. The thickness of the board or veneer to be cut depends upon the position of roller 22 with reference to the knife-blade. The log is so placed that it will be in close contact against this roller, but clear and pass it as it advances. The cutting-edge of the knife extends out somewhat farther from the frame than this roller and closer to the log, so as to be in the latters path as it approaches, and cuts into and through the same as the log advances. The difference of the distance of extension between roller and the cutting-edge of the knife regulates the thickness of the board. The'log in passing on strikes the cutting-edge of the knife, its cut-off portion passing between the former and the frame. After the cut is completed the carriage is returned, the log reset by advancing it laterally toward roller 22 by an operation of the head-blocks, after which the carriage is started up again.

The journals of shaft 23 are eccentrically lo-' cated thereon, so that by the operation of a lever 28, secured to the upper end of said shaft, roller 22 may be moved in or out from the frame, or, which is the same, moved farther or closer to the knife in a lateral direction, permitting thus an accurate adjustment of the out. A screw-threaded pin 29 is secured to this lever and extends into and through a slot 30, located in a segmental bracket 31, which latter is bolted to a frame 19. A screwwheel 32 engages with pin 29 and by being tightened secures and holds lever and roller in their adjusted positions.

In the practical operation of this machine the attendant may ride upon and with the carriage, or he may stand to one side of it. In this latter case the hand-wheel for operating and setting the head-blocks and designated by 33 is placed upon a shaft 34, reaching across the carriage, and transmits the motion to shaft 16 by means of a pair of bevelwheels 35 36. As willbe seen, the log rises continually while passing the knife, thus producing a shearing out, which greatly facilitates the cutting operation. By inclining the knife and its frame toward the approaching carriage, as shown, the degree of the shearing cut is materially increased.

thickness of the boards, also prevents the cut from following the grain and causing the log to run off and into the knife, a possibility which exists and which is favored by certain formations ofthe grain and when the same runs inclined or different to the line of the out.

It should be mentioned here that I find it preferable in most cases to soften the log by steaming previous to commencing its reduction. Its gradual advancement on its supports and toward the knife might be done automatically instead of being accomplished by hand, which substitution has, however, no direct bearing on my invention.- The adjustment of the thickness of the boards might be accomplished by having roller 22 stationary and knife 20 adjustable, which would be a mere reversal of the functions of these parts as first described, without producing any new presence of twowitnesses.

results.

In the drawings the bottom timbers of the carriage are provided with runners 37, sliding in grooved rails 38. This might be reversed,

however, or wheels or rollers substituted for the runners.

Having described my invention, I claim as new- 1. In a wood-cutting machine, the general construction and combination of an inclined track, a stationary knife-frame with knife secured beside the track and inclined thereto,

'a carriage having inclined runners and a horizontal platform and provided with means to hold the wood thereon, an extension 27, reaching down from the under side of the carriage, and connecting means 26, connecting the carriage to the motive power through the medium of said extension, all as substantially shown and described.

2. In a wood-cutting machine of the kind described, the means to regulate the thickness of, the cut and to prevent the same from ,following the grain in a direction different from the intended line of out, said means consisting of aroller 22, a shaft 23, on which the former turns, eccentric bearings on which said shaft turns, an adj ustin g-lever, and means to hold it in its position, and whereby roller 22 may beadjusted laterally with reference to the knife, all as shown and described. Roller 22, in addition to regulating the j construction and combination of an inclined 3. In a wood-cutting machine, the general track, a stationary knife-frame secured beside the track in an inclined position and provided with extensions to which the knife is secured and with bearings for roller-shaft 23 and with a segmental bracket 31, a carriage having a horizontal platform and inclined runners and suitably prepared to securely hold the wood, an extension 27 on said I carriage, to which the motive power connects,

a roller 22, being laterally adjustable in its 5 position between the carriage and the knifeframe, serving as a means to regulate the thickness of the cut and as a guide, a shaft 23, on which this roller turns, eccentric-bearings on which this shaft turns, an adjustable lever, and means to hold it in its position on bracket 31, all as substantially shown and described.

In testimony whereof I affix my signature in BENNO DAMUS. Witnesses:

BUCHANAN PERIN, CARL SPENGEL.

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