US768815A - Power set-works. - Google Patents

Description

PATENTED AUG. 30, 1904.

H. MQGLEARY.

POWER SET WORKS. APPLICATION FILED MAR 2a, 1903.

N0 MODEL.

. WITNESSES:

A TTORNE Y.

' friction-surfaces thereon.

UNITED STATES Patented August 30, 1904.

HEVRY MQOLEARY, OF TACOMA, WASHINGTON.

POWER SET-WORKS.

SPECIFICATION forming part of Letters Patent No. 768,815, dated August 30, 1904.

Application filed March 23; 1903. Serial No. 149,128. (No model.)

To all whom it may concern.-

Be it known that I,HnNRYMoCLEARY,a citizen of the United States, residing at Tacoma, in the county of Pierce and State of Washington, have invented a new and useful Improvement in Power Set-I/Vorks for-Sawmill-Carriages,of which the following is a specification.

My invention relates to devices whereby the log resting on the sawmill carriage is shifted sidewise thereon to bring it in proper position for the saw to cut therefrom a portion of a certain known thickness and accomplishes the above by means of mechanism controlled by the setter and operated by the movement of the carriage.

I attain these objects by the mechanism illustrated in the accompanying drawings, in which Figure 1 is a general view of a sawmillcarriage with my set-works mounted thereon. Fig. 2 is a plan showing my set-works mounted on the carriage, the ordinary hand setworks and its accompanying mechanism being omitted therefrom. Fig. 3 is an elevation of my set-works. Fig. 4; is a partial section of the drum of my set-works to show the Fig. 5 is a vertical section through the collar of the drum of my set-works.

Similar letters of reference refer to similar parts throughout the several views.

The sizes of the-logs sawed the mills of the northern Pacific slope has rendered it necessary that the set-works shall be easily operated and has resulted in several devices being produced whereby they are actuated by power. For small timber, such as is found in the Eastern States, these devices are found useful in the saving of time and labor, while for the large timber they become practically a necessity.

A represents the ordinary carriage of a sawmill, traveling past the saw on the tracksthe shaft G is illustrated in Fig. 1 at H. The foregoing is all old and in present use.

My device'operates the shaft G by the following mechanism: To the carriage A are secured the wooden beams I, which form the foundation for my device. I place these beams adjacent to the hand set-works I-I, so that all the levers of the apparatus shall be close together and easily accessible. To these beams I is bolted the iron frame'J, surrounding and supporting the mechanism and having bearings K, L, and M thereon. The two bearings K support the shaft G as it enters and leaves the machine. The bearing L is central between the bearings K and supports the shaft Gr and the shaft N at right angles thereto. The bearing M supports the other endof shaft N. That portion of the frame J between the bearings K passes under the shaft G and is shaped as shown in Fig. 3. I have made this part of frame J in this way in order that I may place the hereinafter-described bevel gear-wheel P on either side of the bearing L, so that my mechanism can be'used on either a right or left handed carriage. The shaft N rests in the bearings L and M and is at right angles to the shaft Gr. Keyed to the shaft N is the bevel gear-wheel O, engaging the correspondinglybeveled gear-wheel P,

keyed to the shaft Gr. Secured to the back of the gear-wheel O is the conical wooden friction-block Q, (see Fig. 1,) engaging the the drum S. The drum S is loose on the shaft N and has one edge thereof overhanging its supporting-web and shaped, as at R, to form the friction-surface to engage the block Q. The outer surface of the drum S is provided -correspondingly-shaped friction-surfaces R of with a helical groove T, extending from end to end thereof and adapted to receive a rope U of suitable size. The rear end of the drum S is provided with a grooved collar V, which is adapted to be engaged by suitable shifting levers, so that the drum S may be slid on the shaft N, so that the friction-surface R thereof may be brought in contact with the frictionblock Q. I

The shifting mechanism consists of the bars W above and below the collar V, having projcctions IV thereon engaging the groove in said collar V and pivoted to the frame J by the pivot X. To the other ends of the bars IV is pinned the connecting-bar Y, leading therefrom to the vertical hand-lever Z, to which it is pinned. By pulling or pushing on the hand-lever Z the drum S is shifted on the shaft N, and the amount of friction between the surfaces Q and R is controlled. The rope U, I prefer to arrange in the wellknown manner, whereby a continuous rope'is wound in the groove T the full length of the drum and is fastened firmly to it. I secure its ends to the building at the two ends of the travel of the carriage. The method of winding the rope on the drum is the same as that used on the various feed-engines in use in sawmills at the present time.

My set-works is operated in the following manner: Whenever the carriage moves forward or backward, the drum S will be rotated on the shaft N in one direction or the other by the rope U. By pulling on the handle Z while the drum is rotating the friction-surfaces Q and R are brought together, and the gearsOand P are turned, and in consequence the shaft (:r,'the gears F, and the screw-shafts D are turned, and the knees Eare moved forward or backward, according to the direction of the travel of the carriage. In practice I have arranged the proportions of the various gears so that the travel of a foot by the carriage will shift the knees an inch. l/Vhen the knees have been shifted the required amount, as shown by the indicator-dial, the handle Z is pushed so that the friction-surfaces Q, and R are separated and the knees cease to move, although the drum S moves, as above stated, whenever the carriage ismoving.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a sawmill set-works, the combination with a carriage having adjust-able knees carried thereby, a pair of cross-beams mounted transversely upon the carriage, of a frame mounted upon the cross-beams, said frame having a dependingportion, a longitudinallydisposed shaft journaled in the said frame at the uppermost part of its depending portion, a second shaft journaled in said frame and arranged transversely of the carriage, communicating means between the said shafts, communicating means between thelongitudinal shaft and said knees, a drum mounted loosely upon the transverse shaft and rotated upon movement of the carriage, said drum having an offset portion provided with a grooved periphery, a pair of bars pivotally mounted upon said frame and provided with oppositely disposed projections having a working fit in the groove of said offset portion of the collar, and a lever cooperating with said pair of bars to shift the drum into and out of eonnnunication with the said communicating means between the shafts.

2. In a sawmill set-works, the combination with a carriage having adjustable knees carried thereby, of a frame mounted upon the carriage, said frame having a depending portion overhanging the side of the carriage, a shaft journaled in the said frame at the uppermost part of its depending portion and having communication with said knees, a second shaft journaled in the frame, a drum mounted loosely upon the second-mentioned shaft and rotated upon movement of the carriage, means for moving the carriage and revolving the drum, and means for shifting the drum. transversely of the carriage.

In testimony whereofI have signed my name to this specification in the presence of two subscribing witnesses.

HENRY MCCLEARY.

IVitnesses:

J Aims M. HARRIS, A. N. FITCH.

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