US274886A - Shire - Google Patents

Description

(No Model.) a. Sheets-Sheet 1.

J. M. 000K}; J. s. PERKINS. PLANING MACHINE.

No'. 274,886. Patented Mar. 27,1883.-

u. PETERS. vmum n her. wmin m lzc (No Model.) 3 Sheets-Sheet 2.

J. M. 000K an. s PERKINS. BLANING MACHINE.

No. 274,886.- Patented Mar.27, 1883.

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UNITED STATES PATENT OFFICEe JAooE M..oooK AND JESSE s. PERKINS, OF LAKE VILLAGE, NEw HAMP- SHIRE; SAID COOK ASSIGNOR TO SAID PERKINS.

PLANlNG-MACHINE.

SPECIFICATION formingpart of Letters Patent No. 274,886, dated March 27, Iss3.

' Application filed January 3, 1883. (No model.)

1b all whom it may concern.-

Be it known that we, JACOB M. 000K and J EssE S. PERKINS, of Lake Village, in the county of Belknap and State of New Hamp shire, have in ventedImprovements in Planing- Machines; and we do hereby declare that the following is a full and exactdescription thereof, reference being had to the accompanying drawings, making part of this specification-- Figure 1 being a side view of a planingmachine provided with our improvements; Fig. 2, an opposite view of the same; Fig. 3, a horizontal section thereof in a plane indicated by the linear: as, Fig. 1; Figs. 4, 5, 6, and 7, views of parts detached.

Like letters designate corresponding parts in all the figures.

Our improvements belong specially to the class of planing-machinesin which the boards or stuffs are fed to the cutters by an endless belt 'or chain oflags; and our invention consistsin improved means foradjusting this endless belt or chain of lags up and down, for changingthe thickness of the planed stuffs and for adapting this adjustment to other operative parts of the machine, and in means for efi'ecting this adjustment bythe action of the machine while it is in motion, all substantially as hereinafterspecifled.

In the drawings, A A represent the sides of the frame; B, the cutter'head, and O the endless chain of lags,mounted on sprockets, which have their bearings ina frame, D, that is required to be adjusted up or down to produce any required thickness of planed stuff, and this adjustment must be madeuniform in all parts, so that the endless chain of lags shall remain horizontal on the upper or holding and carrying surface, or constantly parallel with the upper or counter feed'roll'ers and with the axis of the cutter-head. It is also necessary,

for good work, to have this frame held very firmlyin all its positions. Heretofore only two adjusting-screws have been employed for effecting the adjustment, located under the middle of the lag-frame, respectively at opposite sides thereof, and these do not give the firmness of support and exactness of adjustment so desirable to have. I

Our improved means of adjusting the lag frame up and down consists in the employment of four adjusting-screws, E E E E, re-

spectively located as near the fourcorners of the frame as practicable, so as to widen the support sufficiently-to sustain all parts firmly,

and in the means for imparting a uniform motion to all the screws simultaneouslly from one source of motion or single operating device. These screws are suitably secured at their upper ends to the under side of thelag-frame D, to be adjusted up or down thereby, are all vertical and parallel, and respectively pass down through revolving nuts G G G G, the screws main frame, is secured a bevel-wheel, I, and

both of these bevel-wheels gear respectively into bevel-pinions J J, secured upon a shaft,

I K, extending at right angles to the shaftH H and properly mounted in hearings on the main frame. The gearings are all arranged so as to turn all the screws E E E E equally simultaneously and in the proper direction to raise or lower the lag-frame D equally in all parts. Consequently the turning of the shaft K inone direction or the other raises or lowers thelagframe at will. A turning wheel orcrank, (I, mounted on the end of the shaft, enables the attendant to adjust the lag-frame by hand; but we provide for doing this by the action of the machine itself, thus saving labor and time. To effect this we employ means as follows, or

an equivalent device:

The shaft L, which receives motion from the shaft M of the cutter-head and transmits motion to one of the sprocket-shaftsNof the endless chain of lags to give the feed-motion thereto, extends across the main frame to a position near the shaft K, its center being in line with the center of the latter shaft. On the shaft L is a (preferably) beveled friction-wheel, O, and on the shaft K are two (preferably) beveled friction-wheels, P Q, attached to a sleeve,

f, having a sliding movement on the shaft. These wheels P Q are so located in relation to the wheel 0, and at such a distance apart, that 2. erases 4 wheel but when the lag-frameis to be raised for planing thinner stuffone of the wheels, as

is brought into contact with the wheel 0,

(their beveled surfaces fitting together,) with sufficient pressure to revolve the shaft K by the revolutionof the shaft L, and when the lag-frame is to be lowered for planing thicker stuff the other wheel, as Q,is broughtwith pressureinto contactwith the wheelO. Thus, since the shaft L constantly revolves while the machine is in operation, the adjustment of the lagframe or planer-bed is effected by the movement ofthe machine itself. The sleevefismoved one Way or the other to bring either of the friction-wheels P Q into contact with the wheel 0 and back to a central position by means of a hand-lever, R, provided with a fork to cmbrace the collar, and arranged as shown in Fig. 2, or otherwise, with similar efiect.

The motion for moving the endless chain of lags is communicated from the shaft'L to the sprocket-shaft N of the lags by means of a revolving shaft, S, extending obliquely from one to the other, and gearing into each by means of beveled cog-wheels g h and z it, re-

spectively. The beveled-gear wheel 9 on the shaft L gears into the larger beveled-gear wheel, h, on the lower end of the communicating-shaft S, and the smaller beveled-gear wheel, t, on the upper end of the said communicating-shaft gears into the larger beveledgear wheel, 70, on the sprocket-shaft N. The relative sizes of these two pairs of beveledgear wheels are such as to produce the desired erate of speed to be given to the feed-lags. As the sprocket-shaft N, mounted in the lagframe, moves vertically up and down with said lag-frame in adjusting the same to the thickness ofstuff to be planed, the distance between the said shaft and the shaft L necessarily varies with such adjustment, and conturn concentrically around the same.

sequently the length of the communicatingshaft S must vary at the same time, as well as its angle of position. To provide for these variations we employ the following means:

First. To provide for the angular adjustment of the communicating-shaft S, its lower bearing, l, is attached to a flange -plate, on, which extends down and surrounds the adjacent shaft L, and is held thereon so as to The upper bearing, a, of the said communicatingshaft likewise is extended in a part, 12, to surround the sproeket-sha-ft N and turn on the same.

Second. To provide for thelengthening and shortening of the communicating-shaft S, it is made in two parts, one a sleeve part, 1', and the other part, 8, extending into and sliding in the sleeve part, as shown in Figs. 6 and 7. A projection or spline, t, on the periphery of the part 8 slides in a longitudinal groove, 20, in the sleeve part 9, or any other suitable means is employed to prevent one part from turning around on the other. The length of the lapping between the two parts should be sufficient and the fit between them should be sufficiently close to prevent any bending of the united parts or complete shaft.

For equalizing and adjusting the pressure of theup'per or counter rollers on the stuff, we employ an improved device, as follows: At each side of the machine each roller is mountedin a bearing, T, which is'arranged to slide in vertical ways in the side frame, A. Be-

tween the two bearings on each side of the machine is located a short lever, V, pivoted at its middle to the frame and hearing at one end on a shoulder or hook, to, of one of the sliding bearings, while the other end of this lever bears on the end of a counter-weighted lever, W, which is pivoted to the other roller bearing on that side of the machine. The levers are so arranged, as shown in Figs. 1 and 2, that the downward draft on the two sliding bearings shall be equal, so that a counter-weight, X, suspended from the lever W, will cause an equal downward pressure on two sliding bearings. The counter-weight X is adjustable to different positions on the lever, and thus the leverage is varied, and'consequently the pressure of the rollers is adjusted at will. The use of counter-weights instead of springs enables the counter force to be exactly determined and made equal on each side. The counter-weights are adjusted along the levers, preferably by notches a, marked and numbered so as to readily determine the force of the pressure exerted by each counterweight and make them always equal.

What we claim as new, and desire to secure by Letters Patent, is-

1. In combination with the lag-frame D, the four adjusting-screws E E E E, revolving nuts G G G G, provided with worm-gears b b b b, shafts H H, provided with worm-screws c c c c, and shaft K, connected by gearing with the shafts H H, substantially as and for the purpose herein specified.

2. In combination with means for adjusting the lag-frame D up and down, actuated by a shaft, K, a shaft, L, continually revolving when theplaning-machine is in operation, and means, 0 P Q R, for communicating motion from the shaft L to the shaft K, whereby the chain of lags is adjusted up and down by the action ofthe machine itself, as herein specified.

3. The combination of the sliding bearings T T and weighted levers W W. pivoted thereto, with the sliding bearings T T and intermediate equalizing-levers, V V, bearing respectively upon the levers W W and said bearings T T, substantially as and for the purpose herein specified.

In testimony whereof we affix our signatures in presence of two witnesses.

JACOB M. COOK. JESSE S. PERKINS.

Witnesses: V

S. (LOLARK, THos. HAM.

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