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US Patent: 741,854
Machine for Removing Bark from Logs
Patentees:
William W. Trevor - Lockport, Niagara County, NY
Francis N. Trevor - Lockport, Niagara County, NY

USPTO Classifications:
144/208.91

Tool Categories:
woodworking machines : specialty machines : debarking machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
M. L. Webster
H. F. Cushman
E. A. Volk
F. F. Scheyinger

Patent Dates:
Applied: Feb. 25, 1902
Granted: Oct. 20, 1903

Patent Pictures:
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"Vintage Machinery" entry for Trevor & Co.
Description:
Wilhelm & Bonner - patent attorneys

This invention relates to that class of machines for removing bark from logs intended for the manufacture of wood-pulp which comprises a vertical rotating cutter-disk arranged in a case, a support on the front side of the case on which the logs are placed and presented to the cutter through a suitable opening in the front of the case, and feed mechanism for pressing the logs toward the cutter and rotating them, so that all of the bark will be removed by the cutter. One object of the invention is to provide such a machine with a simple mechanism whereby the log-support can be readily adjusted vertically to hold logs of different diameters in proper position relative to the cutter. Another object of the invention is to provide an improved and simple feed mechanism for the logs.

We claim as our invention;

1. In a machine for removing bark from logs, the combination of a vertical cutter, a vertically-adjustable log-support, a horizontally-movable bar provided with stepped horizontal faces connected by inclined faces, and a lever connected to said bar for moving the same horizontally, whereby said inclined faces engage said log-support and lift the same from one horizontal face to the next, said horizontal faces acting to hold said log-support stationary at different elevations, substantially as set forth.

2. In a machine for removing bark from logs, the combination of a vertical cutter, a support for holding the log adjacent to said cutter, an elbow-shaped feed-frame pivoted at its inner end below said log-support, a spur feed-wheel carried by the outer end of said feed-frame, means for rotating said feed-wheel, and means for moving said feed-frame to cause the feed-wheel to engage the log on the upper portion thereof and press the log against said cutter and rotate the log on said log-support, substantially as set forth.

3. In a machine for removing bark from logs, the combination of a vertical cutter, a support for holding the log adjacent to said cutter, an elbow-shaped feed-frame pivoted at its inner end below said log-support, a spur feed-wheel carried by the outer end of said feed-frame, means for rotating said feed-wheel, a shield for said feed-wheel carried by said frame, and means for moving said feed-frame to cause the feed-wheel to engage the log on the upper portion thereof and press the log against said cutter and rotate the log on said log-support, substantially as set forth.

4. The combination with a rotary cutter disk and a log-support, of a feed-frame movable toward and from said cutter-disk, a feed device carried by said frame, a strap connected to said frame for moving the same toward the cutter-disk, a rotary part with which said strap frictionally engages, and which tends to move the feed-frame toward the cutter-disk, and means for driving said rotary part, substantially as set forth.

5. The combination with a rotary cutter-disk, and a log-support, of a feed-frame pivoted at its lower end to swing at its upper end toward and from said cutter-disk, a feed de- no vice carried by the upper end of said frame,a treadle, a strap connecting said treadle to said feed-frame, and a positively-rotated part between said feed-frame and said treadle over which said strap passes, and which tends to draw said strap in the direction in which it causes the feed-frame to swing toward the cutter, substantially as set forth.

6. The combination with a rotary cutter-disk and a log-support, of a feed-frame pivoted at its lower end to swing with its upper end toward and from the cutter-disk, a bearing-sleeve secured to the lower end of the feed-frame, a driving gear-wheel, a gear-wheel having an extended hub and mounted in front of said bearing-sleeve and driving gear-wheel, an intermediate gear-wheel connecting said gear-wheels, a treadle, and a strap connecting the treadle with the bearing-sleeve of the feed-frame and passing around said extended hub, substantially as set forth.

7. The combination with a rotary cutter-disk, and a log-support, of a feed-shaft arranged across said disk, a feed-frame pivoted at its lower end in line with said shaft, a feed-wheel arranged at the upper end of the feed-frame, driving mechanism connecting said feed-wheel with said shaft, a pinion provided with an extended hub and arranged in front of the lower portion of said feed-frame, means for driving said pinion from said feed-shaft, a treadle, and a strap connecting said treadle with the pivoted lower portion of said feed-frame and passing over said extended hub, substantially as set forth.

8. The combination with a rotary cutter-disk, and a log-support, of a transverse feed-shaft arranged in front of said cutter-disk, an elbow-shaped feed-frame pivoted on said feed-shaft, a pronged feed-wheel mounted in the upper end of said feed-frame so as to bear on the upper part of a log on said support and provided with a sprocket-wheel, a sprocket-wheel secured to said feed-shaft adjacent to the lower end of the feed-frame, and a drive chain connecting said sprocket-wheels, substantially as set forth.

9. The combination with a rotary cutter-disk, and a log-support, of a transverse feed-shaft arranged in front of the cutter-disk, an elbow-shaped feed-frame pivoted at its lower end on said feed-shaft, a pronged feed-wheel mounted in the upper end of said feed-frame and provided with a sprocket-wheel, a sprocket-wheel secured to the feed-shaft adjacent to the lower end of the feed-frame, a drive-chain connecting said sprocket-wheels, and guide-rollers for the drive-chain mounted on the feed-frame at the elbow bend thereof, substantially as set forth.

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