US451476A - Set-works for saw-mills - Google Patents

Description

(No Model.)

H. GAWLHY. SET WORKS FOR SAW MILLS.

No. 451,476. Patented May 5,1891.

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NITED STATES PATENT OFFICE.

HECTOR GAIVLEY, OF LE ROY, MICHIGAN.

SET-WORKS FOR SAW-MILLS.

SPECIFICATION forming part of Letters Patent NO. 451,476, dated May 5, 1891.

Application filed June 30, 1890. Serial No. 357,188. (No model.)

To a whom, it may concern:

Be it known that I, HECTOR GAWLEY, a citizen of the United States, residing at Le Roy, in'the county of Osceola and State of Michigan, have invented certain new and useful Improvements in Setorks for Saw- Mills, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to new and useful improvements in setworks for saw-mills; and the invention consists in the peculiar con struction, arrangement, and operation of a friction-gear for setting the log on the saw.- mill carriage and for releasing the same, all as more fully hereinafter described, and shown in the accompanying drawings, in which- Figure 1 is a diagram plan of a saw-mill carriage to which my device is applied. Fig. 2 is a sectional side elevation of the device with one of the disks removed as it appears looking from the position of the sawyer in the direction of the carriage when away from the saw. Fig. 3 is a plan view of Fig. 2. Fig. 4 is a vertical central section through the friction-wheel substantially on line y g in Fig. 2.

A is the saw-mill carriage, B the Sliding knees, and O the actuating-shaft of the table, all constructed in any known manner, or as in the ordinary construction of saw-mill carriages.

At any convenient place upon the shaft 0, preferably near the forward end of the carriage, is secured a friction-wheel consisting of two disks D and D, each provided with a circular flange E and secured at such dis tance apart as to form an annular space between the two disks. Preferably one of the disks is cast integral with the hub F, while the other disk is apertured and secured by bolting it to the hub of the first disk. By means of a shoulder G on the hub the two disks are kept the proper distance apart. The two annular flanges on the disks form inner and outer frictional faces for the friction-blocks II and H, which are pivotally secured in pairs to pawls I I. These pawls I 1 project between the two disks diametrically opposite each other, or nearly so, and the friction-blocks are pivotally secured to the opposite sides thereof, one pair to ride on the outer circumference and the other pair to ride on the inner circumference, and of such adjusted distances apart that when the pawls are adjusted to the disk they will ride loosely but bind upon the frictional faces of the disk it turned in any other direction. These pawls are carried, respectively, at the ends of two connecting-rods J and .l', the inn er ends of which are pivotally secured to the setting-lever K, which moves in a plane at right angles to the carriage in an upright position, or nearly so, there being preferably a plate or casting L bolted or secured transversely to the carriage, which carries bean ings formed on either end of the hub, and has the depending lug L to support the fulcrum of the setting-lever, which works through a slot in the plate L, and which works in connection with a quadrant M, secured upon the plate L and carrying the stop N at one end.

The pawls I I are connected to springs O O, thetension of which is applied to draw them in opposite directions in relation to the movement of the friction-disk, as shown in the drawings, in which the spring 0 is secured near the inner end of the pawl I, while the spring 0 is secured to the projecting end of the pawl I. Between the two disks and revolving freely upon the hub is secured a ring P, provided with two tripping-arms Q Q, and with the handle R proj ectin g outside between the two disks curved over into proximity to the operator standing near the end of the lever and supported in a forked standard S,

with the free end in convenient proximity to be within reach of the operator.

The parts being arranged and constructed as described, they are intended to operate as follows: Normally the tension of the springs O O keeps the frictioirblocks and both pawls I I in frictional engagement with both the inner and outer faces of the friction-wheel. Now as the lever ismoved from the position shown in Fig. 2 into the dotted position shown in the same figure, both pawls will be drawn in the same direction with the friction-blocks of one of the pawls I sliding loosely, while the friction-blocks of the other pawl I bind upon the friction-wheel and revolve the same one-half of the revolution necessary or required to advance the knees the required dis tance, the other half of the revolution re- ICO quired to accomplish the complete setting being now obtained by theoperator throwing the lever back into the original position, and it will be seen that by this movement the pawl I is the one which by the binding of the friction-blocks accomplishes further the turning in the same direction of the frictionwhecl, while the friction-blocks I. slide; but the moment the lever is at rest thesprlngs O, by their tension, throw the pawls into position to cause the friction-blocks to bind or engage with the friction-wheels. Thus it will be seen that by adjusting the movable stop N to increase or diminish the sweep of the lever K the degree of revolution imparted to the friction-wheel is increased or diminished, and by a suitable adjustment of the stop N the operator may advance the head-blocks any desired thickness of board. T0 withdraw the knees for setting a new log the operator lifts up the lever R from its support S sut'ticicnt to cause the arms Q and Q to trip the pawls I I by striking against their inner ends, and as soon as the friction-blocks are thereby freed from their frictional engagement the ordinary device for automatically withdrawing the knees-such as the springs Twill be free to accomplish the ob ject, after which the'operator throws the lever R down again as soon as the knees are sufficiently withdrawn, which stops the knees at any desired point.

It will be seen, first, that by my construction no lost motion can occur as in other constructions employed on carriage-gearing. The springs 0 will always hold the triotion-blocks to their work and compensate for any wear which may take place. At the same time the operator, not being obliged to move from his position, can throw the lever K back and forth through the required are of a circle in a minimum of time, and, having the adjusting'stop N under his very hand, can adjust it without loss of time if the thickness of board is to be changed.

The lever It may be grasped by the openator with the same facility without leaving his position and allows him to instantly stop the knees as soon as they are sufficiently withdrawn.

\Vhat I claim as my invention is- 1. In a set-works for saw-mills, the combination, with an oscillating feed-lever, of a friction-disk, two pawls applied on opposite sides thereof and carrying friction-blocks, and springs applied to said pawls in opposite directions, substantially as described.

2. In a set-works for saw-mills, the combination of a friction-wheel having an inner and outer friction-face, two feed-pawls applied on opposite sides thereof and carrying inner and outer friction-blocks, an oscillating feed-lever, and actuating connection bet-ween said feed-lever and the frictionpawls, and the springs O 0, arranged to draw the feed-pawls in opposite directions, substantially as described.

3. The combination of the aetnatingshaft i, the friction-disks D and D, having the annular flange E, the lced-pawls I 1, engaging between the disks on opposite sides and carrying the pivoted friction-blocks II II, the connecting-rods J J, to which the feed-pawls are connected,the tension-springs O and O, the oscillating feed-lever K, and the quadrant with its adjustable stop N, substair tially as described.

t. The combination, with the actuatingshaft C, of the disks l) and I), with the hub F, integrally'formed with one of the disks, the annular flanges E on said disk forming the inner and outer friction-faces, the pawls I I, engaging between the disks, the frictionblocks lI ll, and the actuating connection with the oscillating feed-lever, substantially as described.

5. The combination, with the actuatingshaft (7, of the friction-disks I) and 1), provided with the hub I the ring I, provided with the tripping-arms Q Q, the feed-pawls I I, carrying the friction blocks II II and projecting into the path of the tripping-arms Q Q, the actuating-lever R on the ring P, and the supporting-standard S, substantially as described.

In testimony whereof I affix my signatu re in presence of two witnesses.

'IIEC'IOR (in\\V LE Y. Witnesses:

'.\I. 1 ODoonnn'rr, l. M. lIUnnnn'r.

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