US698750A - Log-turner. - Google Patents

Description

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No. 699,750. Patented Apr. 29, |902.

.1. J. SKINNEB.

Los TURNER.

(Application led Dec. 13, 1901.)

' 2 Sheets-Sheet 2.

(No Model.)

UNITED STATE-s PATENT FFICE.

J OHN J. SKINNER, OF PASO ROBLES, CALIFORNIA, ASSIGNOR OF ONE-HALF TO J. H. HENRY, OF SAN JOSE, CALIFORNIA.

LOG-TURNER.

SPECIFICATION forming part of Letters Patent No. 698,750,`v dated April 29, 1902. Application led December 13.1901. Serial No. 85,828. (No model.)

To all whom it may concern:

Be it known that I, JOHN J. SKINNER, a citizen of the United States, residiu g at Paso Robles, in the county of San Luis Obispo and State of California, haveinvented certain new and useful Improvements in Log-Turners, of which the following is a specification.

My invention relates to those sawmill appliances commonly known as log-turners, in which a mechanically-operated turning device is brought against the log in order to change its position before it is again presented to the saw.

One objectvof my invention is to enable theturning device to be brought into operative position and then put in motion by a single operating lever, the latter controlling two sets of connections for these purposes.

Another object is to produce a simple and easily controlled gearing, preferably frictional, for positioning the turning device and for driving it. j

A mechanical construction for accomplishing these objects and embodying my invention is illustrated in the accompanying drawings and is fully hereinafter described.

In the drawings, Figure 1 is a side elevation. Fig. 2 is a longitudinal Vsection on n: x of Fig. 3. Fig. 3 is a plan. Fig; l is` an end elevation of the chain-guide, one of Vthe bearings" for the tilting frame being shown in crosssection. Fig. 5 is a detail view of the controlling-lever, showing its relation to the operating-rodand shaft to which it is connected.l

In the horizontal framing A is mounted the tilting frame B, in which the operating-chain C iscarried by the sprocket-wheels 1 2. D is the shaft for driving-chain C and is j ou rnaled-V in boxes 3, Fig. 4, at the middle of which is secured the sprocket l. The boxes 3 are long sleeves, ywhich extend up to the sprocket-hub 4. Bolted to the sides of frame B are hollow trunnions E, which turn upon the sleeves 3 and enable the frame B toswing from the horizontal to the vertical effective position of Fig. 1. The sprocket-chainC, which has a series of teeth 5 to act upon the log, travels in the frame and is held in a straight taut position by a guide-grpove 6 on the face of the frame. The upper sprocket 2 is mounted in an adjustable box 7 in order that the chain can be adjusted to the proper degree of tightness on the sprockets. F is an arm, suitably braced and secured to'framc B, from which a chain `G extends to and is wound upon a druml 8 on a" shaft H. When frame B is down, arm F projects toward the front, and when the pull comes upon chain-G the frame is raised to vertical position.

The'operation of the frame and the mot-ion of sprocket-chain C are controlled by different movements of a single'lever I through connections to frictional gearing, driven shafts, and a constantly-running driving-shaft. J represents such a driving-shaft, carrying at vone'end a power-pulley 9 and-at the other a `friction-faced pulley K, preferably built up Sor surfaced with paper or other suitable material. In proximity to this vpulley K, one on each side, are the driven pulleys LM, mounted on the shafts N H, the mounting and boxing of which are of peculiar construction and 'are similar for each of said pulleys. Boxes l2 13 are secured to the main frame, in which are sleeves l1 15, having crank-arms 16 17 and eccentric bores through which respectively pass the shafts N and H, upon which the driven pulleys are mounted.

The lever I, as shown in Figs. ..1 and 5, is connected at its lower end to a transverse rod 18, which through a bell-crank`19 and connecting-rod 20 operate the crank-arm 16. The lever is also connected at a point intermediate between itsupper and lower ends to a thimble on the end of a rock-shaft 21, having bearings in the frame A and provided Twith a crank 2:2,` Fig. 2,-'frorn Which connecting-rod23 extends to crank 17. Thus two centers of oscillation are-provided for lever I, so that it can be given two distinct movements. First, with shaft 21 as a center it can be moved in either direction sidewise (looking at Fig. l) and will'rock'said shaft 21. Rod 1S can be flexible enough to permit this. When shaft 2l is turned by moving the lever to the left, Fig. 1,v the eccentrically-set shaft of pulley M'will be moved toward the frictionpulley and pulley lVLwill be driven, Winding the chain upon drum 8 and raising the sprocket-frame to vertical position. A reverse movement of the lever will throw pulley M off the friction. Second, lever I is a ICC lever of the first class relatively to rod 18, and the connection with shaft 2l, Fig. 5, is the fulcrum. Ilence by pushing the lever inwardly rod 18 and its described connections will be operated and pulley L will be brought into contact with the friction and will be driven in the direction of the arrow, Fig. 2. On the outer end of shaft N is a sprocket 24, from which a chain 25 extends to a sprocket 26 on the driving-shaft D of the log-turning chain. The latter thus receives its effective movement in the direction of the arrow, Fig. l, so long as the pulley L is in contact with the friction.

The logis presented sidewise to the front of the machine in any suitable Way. Before each operation the frame B is down to or toward its horizontal position, as shown in dotted lines in Fig. 1. The operator at thelever I by pushing such lever to the left and inwardly will set both friction-pulleys in motion, causing the frame B to rise and putting the sprocket-chain C in motion, thus turning the log and at the same time holding the frame B up to its work. To throw the machine out of gear and' stop it, he reverses the motion by pulling the lever I and turning it to the right, which releases both frictions. Thus by means of one leverand without moving from his place he controls the whole operation.

Having thus fully described my invention,

what I claim as new, and desire to secure by Letters Patent, is- Y 1. A log-turning apparatus comprising a tilting frame, carrying a toothed chain, a constantly-rotating gear-pulley, a pair of pulleys in proximity thereto, connections from one of such pulleys to the tilting frame, connections from the other pulley to the toothed chain, a single operating-lever, andnde'pendent connections from said lever for causing said pulleys to engage with said gear-pulley.

2. A log-turning apparatus comprising a tilting frame, carrying a toothed chain, aconstantly-rotating pulley, a pair .of pulleys in proximity thereto, connections from one of said pulleys to the tilting frame, connections from the other pulley tothe toothed chain, a single operating-lever, a rock-shaft, to which said lever is pivoted, connected to one of said pair of pulleys, a rod, to'which said lever is pivoted, connected to the other of said pulleys, said lever acting as a crank to turn the rock-shaft, and as a lever fulcrumed to the rock-shaft for operatingthe said rod.

In testimony whereof I have affixed my signature, in vpresence of two witnesses, this 22d day of November, 190].

JOHN J. SKINNER.

- Witnesses:

PAUL PFISTER, A. PFISTER.

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