US60486A - Photo-litko - Google Patents

Description

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IMPROVEMENT In saw unas.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, JAMES Davis, oi' Bulalo, in the county of Erie, and State of New York, have invented a. new and improved Machine for Sewing Logs; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled inthe arts to make and use the same, reference being had to the'accompanying drawings, forming part of this specification, in which- Figure 1, sheet No. 1, is a plan or top view of my invention. I

Figure 2, sheet No. 2, a sido sectional view of the saine, taken in the line :e xdg. 1.

Figure 3, a side sectional view of a portion of the same, taken in the line y y, fig. 1.

Figure' 4, a transverse vertical section of the same, taken in the line .e e, g. 1.

Figure 5, a transverse vertical section of a portion of the saine, taken in the line as' ai', fig. 1.

Figure G, a horizontal section of a portion of the same, taken ih the line y' y', iig. 3.

Similar letters of reference indicate like parts.

This invention relates to a ncwland improved oircular-saw mill of that class in which a gang of saws are employed. The invention consists in an improved feeding mechanism for feeding the logs or cants to the saws, as hereinafter fully shown and described.

A A represent two frames secured to a proper base or flooring, B, and each having an arbor or shaft, C', uponit. On these arbore or shafts, C, circular saws, D D', are key-ed at suitable distances apart to suit the thickness of the stuff to be sawed. One gang or series of saws, D, may be placed at such a distance apart as to saw boards, and the other gang, D', adjusted or arranged at such a distance apart as to sawplanks. E E' represent two series of rollers on which the cant is placed. These rollers, two or more of each series, are driven by gears a and shafting b, from gearing connected with thc ii'uted feed-rollers, F, of the device. (See iig. 1.)

The rollers E'E' present the cants to thev feeding device of the saws.' rlhis feeding device, which constitutes the invention, is constructed and arranged as follows: In the lower parts of the frames A A', and directly front of thesaws D D', there are fitted i'luted rollers, F, which work` in lixed bearings, and similar luted rollers, F', are placed in the lower pants of the frames A A', at the rear of the saws, the rollers F F' being in the same horizontal plane. The rollers F F' have toothed wheels, H, on their outer ends,`and these wheels are connected by an intermediate gear-wheel, I, as shown clearly in iig. 3, the wheeled being on shafts J, and gearing into pinions J', onl shafts K, which are driven by belts K', from a driving or power-shaft L, the'saw arbore or shafts, C, being also driven from said shaft. by belts M M. InY the frames A A', and above the iiuted rollers F F', there are-placed adjustable rollers, N N'. These rollers have smooth peripheries, and their journals are tted in orpass through vertical oblong slots, e, in theframes A A', and into the upper ends of vertical bars, d, the lower ends of which are pivoted to levers, 0, oneend of which are secured by fulcrum pins, e, to pendants, f, attached to the base or iiooring, B, as shown ink fig. 3. The opposite ends of the levers, O, are pivoted to the upright bars, P, which extend up by the outer sides of `the frames A A', and pass through guides, Q, the bars, P, having rack-teeth, g, made in thcmto catch on the ends of the guides Q, the teeth, g, being retained thereon by keys or wedges, R, which are driven down between the upper parts of the bars P, as shown in iig. 3. -On each lever, O, there is placed an adjustable weight, S, .secured in position -by a set-screw, t. By

adjusting the bars, P, higher or lower, the rollers N N' rmay be made to bear with a greater or less pressure on the log and cause the same to bear upon the lower ilut'ed rollers, F F', which feed the log to the saws and discharge the boards or planks therefrom. In case it is desired vto have the upper or pressure rollers, N N',

yield or lgive, the leys or wedges, R, may be removed, and the weights, S, adjusted to give the desired downward pressure to'said rollers. Directly behindeach gang of saws there are placed a series of circular plates, T: These plates are placed on shafts, U, the ends of which are fitted in slides, V, having screws, W, passing throughthem, by which the slidesl may be raised and lowered. (See iig. 5.) These circular plates are adjusted higher or lower in the saw-kerfs and prevent the saws from binding and heating therein. They however comprise no part of this invention, as they are included in the subject-matter of another application. The rollers, E E', effect` a great saving in labor, as the cant may be turned over upon them direct from the carriageon which its slabs were cut or sawn oil', and said rollers conduct at once the cant to the feed-rollers, F N,

which feed the cant to the saws, the cant of course being placed on either series of rollers E or E, according to Whether boards oi' planks are to be sawed.

Having thus described my invention, I claim as new, and desire to secure by Letters Patent- Adjusting the rollers N N by means of bars 0l, levers O, Weights S, notched bars P, guides Q, and wedges R, as end for the purpse specified.

The above specification of my invention signed by me this 18th day of June, 1866.

i JAMES DAVIS.

Witnesses:

WM. F. MGNAMARA, ALEX. F. RoBERTs.

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