US81432A - Improvement in machine for turning logs in saw-mills - Google Patents

Description

ESAU TARRANT, 0F MUSKEGON, MICHIGAN.

IMPRVEMENTIN MACH-INE FORTURN-ING LOGS IN SAW-MILLS.

Specication forming part of Letters Patent No. QLdSQ, dated August 25, 1868.

To all lwhom may concern:

Be it known that I, EsAU TARRANT, of Muskegon, in the county of Muskegon and State'of Michigan, have invented a new and4 Improved Machine for Rolling Saw-Logs and I .do hereby declare that the following is a full, clear, and exact description thereof', which will enable others skilled in the art to make and use the same, reference being had to the 4accompanying drawings, forming a part of this specification.

Figure l is a side view of my improved machine, parts of the frame being broken away to show the construction. Fig. 2 is a detail sectional view of the same, taken through the line w Fig. 1.

Similar letters of reference indicate corresponding parts.

My invention has for its object to furnish an improved device for turning or rolling logs to its forward side, and which moves up and down between the posts D. attached to the frame A. The lower end of the toothed arm Gis pivoted to and between two blocks, E, which move up and down in grooves in the inner sides of the posts D, as shown in Fig. 2 and in dotted lines in Fig. 1. This construction p enables the upper end ofthe upright bar G to move back and forth to adjust itself to the size of the log to be rolled or turned upon the carriage B, and also toenable the teeth c to pass the log when the bar is descending.

To the rear side of the lower endet' the bar C is attached, or upon it is formed, a block,

arm, or projection, c2, towhich is attached the end of the rope or chain F, by means of which the said upright bar C is raised to turn the log. This manner of attaching the hoistingchain forces the upper end of the' said bar (l forward, causing the teeth c1 to take a firmer hold upon the log to be rolled.

The chain or rope F passes over a pulley, G, secured in proper position immediately beneath' the log-deck H, and thence down to the barrel or drum I of the shaft J, to which its end is securely attached.

To the shaft J is attached the large frictionpulley K, to which motion is given by the small friction-pulley'L, attached to the shaft M, to which shaft is also attached the pulley N, by means of which motion is communicated to the apparatus from the driving power of the'mill.- f

One end of the shaft M works in stationary bearings attached to or connected with the fra-me of the mill, and its other end works in bearings attached to the bridgetree 0, one end of which is pivoted to the frame A, and the other end of which rests upon the cam P of the cam-shaft Q, so that by means of said camshaft the bridge-tree O may be raised or lowered to bring the friction-pulley L into or remove it from contact with the friction-pulley K.

vIt is the brake-bar, which may be made of wood or other suitable material. One end of the brake-bar R is pivoted `to the frame A or to some other suitable support, and its other end is connected with the end of the bridgetree 0 b y the bar S, so that as the frictionpulleyV L is moved away from the friction-puh ley K the brake may be applied to the frictionpulley K, either to hold the bar Ostationary or to allow it to descend with any desired rapidity.

To one end of the cam-shaftQis attachedalever or arm, T, having a weight, U, suspended from its end, which may be regulated to hold the friction-pulley L against the friction-pulley K with any desired force. l

The lever or arm T may be operated to throw the friction-pulley L into or out of gear with the friction-pulley K by means of levers or cords, as may be desired or convenient.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

with relation to the bar C of the cord or chain F, pulley G, shaft J, drum I, friction-pulleys K L, and adjustable shaft M, all as set fortn and shown.

3. The arrangement of the pivoted brake R,

4. The arrangement of the cam and shaft P Q and weighted arm T, with relation to the connected brake and'bridgetree, to operate as and for the purpose described.

The above specification of my invention connection S, and pivoted bridge-tree 0, (in signed by me this 10th day of June, 1868.

which isformed the outer bearing for shaft M,) substantially as herein shown and described, whereby pulley L is removed from contact with pulley K, and the brake brought into contact with the latter, and vice versa, simultane ously, as herein set forth.

ESAU TARRANT.

Images