US130904A - Improvement in machines for turning logs - Google Patents

Description

E. Ct DICEY.

Improvement in Machines for Turning Logs'. No. 130,904, Y Patented Aug.27,1a72

UNITED STATES ELMER C. DIGEY, OF WITEHALL, MICHIGAN.

IMPROVEMENT IN MACHINES FOR TURNING LOGS.

Specification` forming part of Letters Patent No. 130,904, dated August 27, 1872.

To whom it may concern:

Be it known that I, ELMEE G. DIcEY, of

.Whitehalh in the county of Muskegon and State of Michigan, have invented a new and useful Improvement in Machines for Turning Logs; and I do declare that the following is a true and accurate description thereof, reference being had to the accompanying drawing and to the letters of reference marked thereon and being apart of this specification, in whichdrum-shaft with and rotating it by a double friction-gear, and in the means employed to move the loose boxes of the driving-shaft for throwing the friction-drivers into contact with the friction-gears, all as more fully hereinafter set forth.

In the drawing, A represents the saw carriage, and B B the knees. C is the mill-iioor, and below it is the usual frame-work. D is a metallic frame, securely bolted to the framework under the floor on the saw 7 side of the carriage. E is the driving-shaft, jonrnaled in boxes F, which are so secured to the frame by bolts a passing through slots in them that they may have a longitudinal movement, carrying the shaft bodily toward or away from the saw. E is a driving pulley, keyed on thev shaft E about midway of its length, and is continuously rotated by a belt from any convenient pulley in the mill. G are crankscrews, tapped through studs b at the sides of the frame D, andtheir extremities are annularly recessed to engage with recessed collars c at the back ends of the journal-boxes F, so that the rotation of the screws will move the boxes on the frame. The cranks of the screws are connected by a rod, H, which also connects them with a shipper-lever, I, pivoted at its lower end to` some part of the millframe,`and whose upper end projects above the floor through a slot therein, by w ich the sawyer can move the boxes in unison. J J are friction-wheels, keyed on the drivin gshaft, one near each end; and K K are friction-pinions, keyed on a sha-ft, L, journaled in boxes M M in the frame parallel with the drivingshaft. This shaft L is so placed with relation to the driving-shaft that a partial rotation of the screws will move the boxes of the drivingshaft enough to force the perimeters of the friction-wheels into contact with the perimeters of the friction-pinions, and thus revolve the latter,'or a reverse movement of the screws will Withdraw them. N is a wide leather or rubber belt, one end of which is secured to the shaft L about midway of its length, while the ,other end is secured to the lower end of the serrated rack-bar O, whose upper, end plays through an opening in the iloor, and also through an elliptic opening, D', in the frame D below it and directly under the side of the carriage which is next the saw. To the rackbar, near or toward its lower end, is pivoted one end of a long radius-arm, l?, whose other end is pivoted to the iioor-joists or some part of the mill-frame.

The belt N, not being coiled or wound on the shaft L, it will allow the rack-bar to drop down until its upper end is just below the millfloor. Now, if the sawyer desires to turn the log on the carriage, he will throw the shipperlever I to the position shown in Fig. 1, which will bring the friction-wheels into contact with the friction-pinions, to revolve the shaft L and wind up on it the belt N, and raise the rackbar, the commencement of which is shown in Figs. 1 and 2. The radius-arm P serves as a fulcrum, and, as the lower end of the rack-bar is pulled away from it as it is raised up it follows that the bar must incline toward the log, and follow it around, as it were, in turning, keeping its serrations dug into the timber, and give the log a tendency to revolve on its axis. rThis arrangement precludes all possibility of the slipping of the bar from the 10g.

I am aware that such a rack-bar as is here shown has before been used for a like purpose, but not in like manner, it having onlya movement in a vertical plane.

The advantage of the double friction-gears lies in the fact that there is no torsional strain thrown on the shaft, and that the labor is divided between the gears, lessening their ten` dency to slip, while the means employed to insure contact cannot fail to produce it. When thrown out of gear, the rack-bar will drop of its own Weight, and unwind'the belt from the shaft by revolving the latter in a reverse direo tion.

What I claim as my invention, and desire 'to secure by Letters Patent7 is The means for actuating the driving-shaft E in forcing it into contact with. the shaft L, consisting ofthe friction-pinions K K, fricV tion-wheels J J, the sliding` boxes F F, the crank-screws G G, connected together by the rod H, and by the same rod to a shifter-lever, I, substantially as described and shown.

ELMER C. DlOEY.

Witnesses:

DAVID G. SoRoeGs, GEO. H. HUBBARD.

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