Feed and set works for saw-mills
US 245632 A
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Description (OCR text may contain errors)
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2 Sheets-Sheet 2. F. A. HUNTINGTON.
FEED AND SET WORKS FOR SAW MILLS. No. 245,632.
Patented Aug. 16, 1881.
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UNITED STATES PATENT Ormea.'
FRANK A. HUNTINGTON, OF SAN FRANCISCO, CALIFORNIA.
FEED AND SET WORKS FOR SAW-MILLS.
SPECIFICATION forming part of Letters Patent No. 245,632, dated August 16, 1881.
Application filed August 30, 1880. (No model.)
To all whom it may concern:
Be it known that I, FRANK A. HUNTING- TON, ofthe city and county of San Francisco, in the State of California, have made and invented certain new and useful Improvements in Feed and Set Works for Saw-Wills, which invention is fully set forth and described in the following specification and the accompanying drawings therein referred to.
My invention relates to improvements in mechanism for feeding and setting logs in sawmills. The mechanism by which I obtain these results is fully set forth and illustrated in the following description and the drawings accompanying it.
In the said drawings, Figure 1 is a front ele vation of the stationary frame-work that supports the saw-arbor and the mechanism adjacent thereto and not connected with the logcarriage. Fig. 2 is a plan view of the same, showing also a portion of the log-carriage and its track. Fig. 3 is a detail view of the friction` wheel and its connections. Fig. 4C is an elevation in transverse section through the log-carriage, showing the headblock and its automatic setting mechanism. Fig. 5 is a plan view of Fig. 4. Figs. 6, 7, S, and 9 are detail views of the machine.
The frame-work A has suitable bearings for both ends of the saw-spindle b, and also for an intermediate shaft, C, to which motion is continuously imparted from the spindle by means of the cone-pulleys D E and the beltf. The spindle has the drivin g-pulley G upon its outer end, and is the principal shaft of the feed mechanism, besides operating the saw. Between these two shafts b C, I arrange a long shaft, H, the outer end of which turns in a bearing, t', fixed on the frame beneath the carriage I, and carries a pinion, t', that engages with a rack, t2, on the under side of the carriage, while the other end of this shaft is mounted in a swinging bearing or box, J, upon the frame A, so that this end of the shaft can be moved laterally, the object of which will be seen more clearly hereinafter. At this end of the shaft, also, I fix a large wheel, K, having a rim with a frictional surface designed to engage and run iu contact with a friction-pulley, L, on the shaft C, so as to be driven thereby. By this means the shaft H is rotated and caused to move and feed the carriage forward i against the saw.
In order to eect a reverse movement of the shaft H, so that the carriage can be run back from the same forward movement or rotation of the two shafts I; C, I interpose the loose pul` For the purpose of bringing and holding the friction-wheel K in contact with the pulley N, to feed backthe carriage, I mount the inner end of the shaft H in the swinging box J, as before mentioned, so that a slightlateral movement can be given to the wheel K,sufciently to bring it against the pulley N. This lateral movement is given to the wheel by means of the rock-shaft Q,its upright hand-lever P,th`e arm rupon the rock-shaft, and the connectingrod r', pivoted to the end ofthe arm r and at-v tached to the pivoted bar e', carrying upon its lower end the box Jfor the shaft H. This bar o is pivoted at J to the framework A. These parts are so arranged that the lateral movement required for the wheel K is very slight, and by pressing upon the lever P in a direction as indicated by the arrow, Fig. l, the Wheel Kand pulleys M N will be brought together and the carriage moved backward. By releasing the lever the wheel K will drop back into position against the pulley L, and the carriage will resume its feeding movement.
The means for setting the logs upon the carriage I, io regulate the thickness of board to be cut, consists of a friction feed device combined with the feed-screwR of the head-block, and arranged to be operated Vat the backward movement of the carriage. The feed-screw R l is geared to a cross-shaft, s, extending alongside of the carriage from one block to the other, by means ofthe wheel and pinion t t, and this shaft carries and is fixed at one end to awheel, U, having upon its inner face a projecting Bange, w, concentric with the hub of the wheel. Against this side of the wheel and fixed to a IOO hub or collar which turns freely upon the shaft I arrange an upright rocking-lever, T, having upon its sideand in a loose socket a frictiondog, X. The lower end of this dog rests upon the wheel-hub, while its upper end works in contact with the inner surface of the annular flange w. It is placed in position somewhat diagonally to the radius of the wheel, and it has behind it a spring, y, that acts to press forward the upper end. Now, by the forward movement of thelever this dog cramps or binds in between the flange w and the hub, and as the lever is drawn forward the wheel turns with it and rotates the shaft s. At the backward movement of the lever the end of the dog willslip on the flange, and no movement of the wheel U will take place. Thus every forward movement ofthe lever T will turn the wheel and cause the feed-screws to rotate and move the head-blocks.
The extent ofthe forward movement of the lever is regulated by the adjustable and automatic mechanism employed to effect the feed at the backward travel of the carriage, and described hereinafter more partieularly,while its backward movement is governed by the fixed stop z, projecting from some convenient part of the head-block frame, and the downwardly-projecting arm y' on the hub or collar of the lever.
I produce the forward rotation or feeding movement of the screw-shaft R automatically and at the backward run of the carriage I by means of the lever-arm X', fixed to and projecting from the hub of the lever T in a downward direction and out beyond the wheel U, so as to run upon and over a fixed incline, S, secured to the floor alongside of the carriage.
This arm, then, at the backward run of the carriage, comes in contact with and runs up over the incline, and is raised up thereby the required distance to turn the lever T forward and give motion to the friction feed-wheel U.
I make this incline S capable of adjustment to a greater or less height or inclination by hinging its lower end to the floor-plate S' and by keeping it elevated by means of a movable and adjustable bar, w', beneath its outer end. The length of feed of' the log on the carriage is then regulated by varying and setting this incline at a greater or less angle. The end of the arm X' runsin contact with the face of The movements of one feed-screw are communicated to the other head-block by extending the shafts to and gearingit into that feedscrew at the opposite end of the carriage. In this manner I provide a simple and effective means for reversing the movements of a logcarriage and for feeding up the logs automatically to produce any thickness of board, as the carriage "feeds7 or runs back after each cut.
I attach a pull-rod, V, to the upright bar of" the lever T, in order to permit the head-blocks to be fed up by hand when desired-as, forinstance, when it is required to cut one or more boards of greater thickness than the automatic feed will set i'or. This rod runs through a slot in thefXed bar YV, and its forward movement is regulated by the movable stop o, so that its movement can be measured and controlled.
Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is-
l. In a saw-mill feed and set works, the combination, with the head-block feed-screw R, of the shaft s, geared into the feed-screw, the friction-wheel U, with its annular flange w and hub, and the lever and feed-dog X, controlled and operated by means of t-he stops z y', and the fixed incline S and arm X', substantially as and for the purposes set forth.
2. The combination of the lever-arm X', lever T, friction-dog X, spring y, flanged wheel U, shaft s, wheel and pinion t t, and fixed in eline S, constructed and arranged as described, for feeding the screw-shaft R automatically forward at the backward run of the carriage I, as described.
In witness whereof' I have hereunto set my hand and seal this 4th day of August, A. l). 1880.
FRANK A. HUNTINGTON. [L. s l In presence of- EDWARD E. OsBoRN, W M. F. CLARK.