US283670A - Geant - Google Patents

Description

(No Model) 2 Sheets-Sheet 1.

BQBSERGBANT. SAW Mm. SET WORKS.

10.283,670. maimed Aug. 21, ma. v

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(No Model.) 2 Sheets-Sheet 2 B. E. SERGEANT.

SAW MILL SET WORKS.

No. 283,670. Patented Augzl, 188s.

WITNESSES i a@ NTOR La/M 13%... f

ATTURNEYS.

elfi? UNTTED STATES PATENT EETCE.

BENJAMIN EVENSVSRGEANT, OF GREENSBOROUGH, NORTH CAROLINA.

SAW'M l LL SET-WO RKS.

SPECIFICATION forming part of Letters Patent No. 283,670, dated 'August 21, 1883. Application filed March 17, 1883. (No modcLi To aZZ whom, it 77mg concern/f Be it known that I, BENJAMIN EvENs SEE.- GEINT, of Greensborough, in the county of Guilford and State of Forth Carolina, have invented a new and useful Improvement in Saw-Mills; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this speciication, in which-- Figure 1 is aplan view. Fig. 2 isavertical section through theline :U to, Fig. 1, looking in the direction oi' the arrow. Fig. 3 is avertieal section through the line y y, Fig. 1. Fig. 4 isa vertical section through line e e, Fig. 1.

My invention relates to saw-mills; and it consists in improved means for adjusting the log to the saw, as will be more fully described hereafter. I v

In the drawings, A represents the base or frame timbers of the mill, and B is the traveling carriage, arranged, as usual, upon rollers, and provided on its under side with a rack or straight gear, g, Fig. 2, meshing intoapinion on a reversible shaft. j

C is the main shaft of the mill, bearing upon one end the circular saw D and upon the other the drive-pulley E, through' which motion is imparted to the running parts of the mill.

Parallel with the shaft G is arranged the reversible shaft F, bearing the pinion which meshes with therack on the under side of the log-carriage, which shaft F receives motion from the shaft Gthrough the following revers ing mechanism: On the reversible shaft F is arranged a loose p ulley, G, which is connected by a belt, G', to a pulley, G2, on the main shaft C. On the reversible sha-ft F is also arranged a loose wheel, H, having gearteeth on its periphery which engage with apinion, H',

on the same shaft with a cone-pulley, H2,

which, by abelt, H3, is connected to a conepulley, Ht, on the main shaft. These conepulleys, with belt H3 andthe pinion and gear' wheel H H', serve to impart motion to the reversible shaft F through a clutch for the purpose of driving the log-carriage forward, and the pulleys and belt G G G2 impart a reverse movement, to the shaft F through a clutch for the purpose of driving the log-carriage in the reverse direction. For regulating these movements, a double friction-clutch, I I', is arranged on the shaft F, so as Jto-revolve rigidly with it, but be adjustable longitudinally on the same, which is accomplished by means of a feather or spline. The two portions of the clutch are made diskfshaped, and have fricytional side faces that are arrangedto engage,

respectively, with one or the other of the two loose wheels, G and H. The two disks of this clutch are connected together by a collar with a groove around it, and in said groove swivels the forked arm J of a rock-shaft, Ii, arranged at right angles to shaft F and crossing the same. By rocking this shalt in one direction one face, I, of the clutch is brought into frictional engagement with the loose WheelV H, and the log-carriage is driven ahead. By rocking the shaft in the other direction communication isbrokeu with wheel H, and the other side of the clutch is brought into frictional engagement with the loose pulley G, driving the log-carriage back. For rocking said shaft, I may employ a lever, L, which moves over an arc-shaped bar, L', and is held to its adjustment by a locking-bolt, which lever has a toethat operates in a forked arm, L2, of the roclnshaft to rock it. Another means for operating this clutch consists of a crank, M, on the end of the rock-shaft, and a long pull-rod, M, whose use will be explained farther along.

On the log-carriage are arranged the transverse log-restsB, of which there are two near each end, arranged in pairs, and having dovetail sliding blocks B2 135 arranged between p them. These sliding blocks are connected to the log-beam B3, and they serve to adjust the log-beam laterally' to throw the log more out to the saw as each board is cut off. For adjust-ing these sliding blocks, screw-threaded rods M2 M3 are tapped through said blocks, and are swiveled by means of a collar in crosspieces connecting the paired log-rests. Each of these screw-threaded rods is provided with a bevel-wheel, a. a', which latter are respect ively iixed on screw-shafts N N at right angles to M M. These screw-shafts N N ter'- minate in crankfhandles b b, which are closely juxtaposed and of the sameV throw, so that the stem or handle portions of the cranks may be brought into line. The screw-threaded portions of these rods N N carry nuts c c', which laterally to the saw.

It will be seen that the cranlehandles of the duplicate setting devices are provided with a common sleeve or handle, e. This sleeve not only fullls the function of ahandle when it is on one of the crank-stems, `but it is capable of being slipped partly off of one crank-stem and partly on the other, when brought into line, and thus serves as a coupling to connect the two for an exactly equal revolution and equal and simultaneous adjustment of both ends of the log-beam. Vith the arrangement shown and described the workman is enabled from his position near the setting-cranks to manage all of the adjustments of the sawi. e., the setting of the ends of the log-beam separately or together, or the reversal of the movement of the log-carriage, the long pull-rod M being extended to that point for that purpose.

In connecting the log-beams B3 to the sliding blocks B2 B5 it is not rigidly attached to the same, but is pivoted to each of said blocks, so that it can be turned into aposition oblique to the line of movement ofthe log-carriage, as shown in dotted lines in Fig. l. One end of the log-beam is fitted over a boss, f, (see Fig. 3,) of the sliding block B5, and is held thereto in pivotal relation by a screw-bolt.' The other connection to the other sliding block, it is obvious, must have some provision for compensating for the increasedlength which exists between the two sliding blocks when the beam B3 is arranged diagonally, and for this purpose the sliding block B2 is provided with an undercut cleat or plate, g, which is loosely pivoted to the said sliding block. Then on the under side of the logbeam is fastened a plate, h, having an undercut slot in the same,

with an opening at the end large enough to permit the cleat g to pass through and be slipped up into the slot. This form of connection permits this end of the beam to turn and l also move endwise to compensate for the dagonal position.

The saw-guide consists of a frame, O, with a forked projection on one side, each of the branches of which carries a bearing-pin for the saw, and which frame sits upon a support, P, iixed to main frame A, and upon which its position is adjusted laterally by set-screw t' and endwise by set-screwj.

Now, in deining more clearly the scope of my invention in regard to some of its features, I would state that I am aware that the log has been adjusted on its carriage by means which permit its ends to be separately advanced or moved together with an equal adjustment. I am also aware that thescrew-rods with bevel gears, pointer, and graduated plate are not broadly new as a means for adjusting the log.

Having thus Vdescribed my invention, what I claim as new is l. The combination, with the sliding blocks of the saw-carriage and the two sets of right angular screw-rods with bevel-gears, of apair of cranks of equal throw, arranged on the adjacent ends ofthe screw-rods, and an adjustable sleeve or coupling adapted, as described, to slide from one crank-stem to the other or couple them both, as shown and described.

2. The combination, with asaw-carriage, of a swiveled or pivoted log-beam arrangedl to be adjusted at right angles to the line of cut, or obliquely thereto, as described. 4

3. The combination ofthe sliding block B2, having a boss, f, the sliding block B5, having swiveling cleat g, the log-beam B3, pivoted to boss f by a screw-bolt, and having a slotted and undercut plate, h, fitting over cleat g, for a longitudinal adjustment, substantially as shown and described.

BENJAMIN EVENS SERGEANT.

Witnesses:

J. T. WooTERs, W. R. ANnRnWs.

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