US141028A - Improvement in saw-mills - Google Patents

Description

B. BERNDT. Saw-Miils.

N0. 141,028, Patented .Iuly 22,1873.

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, AM, PHoro-umomfH/c co. Mosamvf's mams) UNITED STATES PATENT EEICEo BERNHARD BERNDT, OF WILLIAMSPORT, PENNSYLVANIA, ASSIGNOR TO RILEY & MAITLAND, OF SAME PLAGE.

IMPROVEMENT IN SAW-MILLS.

Specification, forming part of Letters Patent No. 141,028, dated July 22, 1873; application iiled May 29. 1873.

To all whom it may concern: l

Beit known that I, BERNHARD BERNDT, of Williamsport, in the county of Lycoming and State of Pennsylvania, have invented a new and useful Improvement in Saw-Mills; and I do hereby declare that the following is a full and exact description of the same, reference being had to the accompanying drawings and to the letters 'of reference marked thereon.

Thisinvention relates to the means employed for communicating the proper reciprocating motion to the logcarriage from the main power; and consists mainly in the combination of an. adjustable plate or block and lever of peculiar construction with sliding boxes, carrying the shafts of the friction pulleys which communicate motion to the shaft which actuates, by means of its pinion, the log-carriage, as will be fully described hereinafter.

In the drawings, Figure l represents a plan view of my invention as applied to a saw-mill; Figs. 2, 3, and 6, Views of various parts detached 5 and Figs. 4 and 5, views of the friction-drum and the vertically-moving pulleys.

To enable others skilled in the art to make and use my invention, I will now proceed to describe fully its construction and manner of operation.

A A represent frame-work of any proper construction; B, the saw shaft, turning in suitable bearings, and provided with proper pulleys,` in the usual well-known manner. C

represents the shaft carrying the upper fric-` tion-pulley c, and D, Fig. 2, represents the 'lowershaft carrying the lower friction-pulley d, Figs. 4 and 5, as shown. These shafts are provided with proper pulleys for receiving power for the sawshaft,`as shown, and are supported at one end in bearings :v Fig. 1, adapted -to permit suitable vertical movement at the other end to cause either friction-pulley to come in contact with the pulley upon the shaft which actuates the carriage.

The means employed for moving these shafts verticallyconstitutes my invention, which will now be described. E represents a guide-block, rigidly bolted to the frame-work, which is provided with suitable grooves or ways, in which move the sliding block e, having bearings e1 for supporting the pulley-shafts, which latter pass through suitable slot-s in the guideblock, as shown. If desired, the sliding block may move between friction-pulleys, as shown in Fig. 6. e2 represents a plate having a tongueshaped lug, e3, as shown. It is bolted to the sliding block c, and by means of slots is made adjustable to compensate for wear. F repA resents a lever having its short arms provided with curved fingers upon each side, which are adapted to inclose the tongue-shaped lug, as shown. The friction-pulleys are employed in connection with a friction-pulley attached to the shaft, which actuates the carriages in the usual well-known manner.

The operation will be readily understood. By means of the lever, the sliding block is caused to move vertically, as described, and bring one or the other of the friction-pulleys in contact with the intermediate pulley which operates the carriage. The tongue shaped lug, by means of its double curve, is enabled to adapt itself to every movement of the lever.

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

The combination of the linger-headed lever F, the adjustable plate e2, the sliding block c, and guide-block E, substantially as described.

This specification signed and witnessed this 19thv day of May, 1873.

Witnesses: BERNHARD BERNDT.

M. L. LIGGETT, D. N. ROOK.

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