US453598A - Sawing-machine - Google Patents

Description

(No Model.) 4 Sheets-Sheet 1.

G. W. MASON, N. SHAW & G. H. HOPPER. SAWING MACHINE.

No. 453,598. Pate med June 2,1891.

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(No Model.) 4 Sheets-Sheet. 2.

G. W. MASON, N. SHAW & G. H. HOPPER. SAWING MACHINE.

No. 453,598. Patented June 2,1891.

(No Model.) 4 Sheets-Sheet 3.

G. W. MASON, N. SHAW & G. H. HOPPER. SAWING MACHINE.

N0. 453,598. Patented June 2,1891.

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4 Sheets-Sheet. 4.

(No Model.)

G. W. MASON, N. SHAW & G. H. HOPPER.

SAWING MACHINE.

No. 453,598. Patented June 2,1891.

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GEORGE W. MASON, NOAll SHAW, AND GEORGE ll. HOPPER, OF EAU CLAIRE, VISCONSIN.

SAWlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 453,598, dated June 2, 1891.

Application filed May 26,1890- Serial No. 353,237- (No model.)

T0 60% whom it may concern.-

Be it known that we, GEORGE XV. MASON, NOAH SHAW, and GEORGE H. HOPPER, cititens of the United States, residing at Eau Claire, in the county of Eau Claire and State of Wisconsin, have invented certain new and useful Improvements in Machines for Resawiug Lumber and Making Boards from Slabs; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to a machine for sawing lumber and making boards from slabs; and it consists in certain novel constructions, combinations, and arrangements of parts hereinafter fully described, and specifically claimed,whereby a resawing-machine of novel construction and greateffectiveness is secured.

In the accompanying drawings, Figure 1 is a top view of our invention. Fig. 2 is a vertical longitudinal section of the same. Fig. 3 is a front view of the machine. Fig. r is a sectional view of the feed-roller mechanism. Fig. 5 is a detail sketch of the shipping-gear in the feed-roller mechanism. Fig. 6 is a horizontal section of the supporting structure of a vertically-adjustable sawing and feeding mechanism, taken in line with the vertical adjusting mechanism; and Fig. 7 is a detail sketch of a tension mechanism for abandsaw used in our invention.

The letters A A A in the drawings represent the stationary supporting-base constructed or mounted on standards or legs a, or sustained in any other suitable manner; B, a vertically-adjustable sawing-platform; C, a ban dsaw; D and E, feed-rollers.

The band-saw C is stretched over two pulleys F F, of which F is the driving-pulley and F the tension-pulley. The pulley F is fastened to a driving-shaft f, which is hung to two bearings f, and is provided with a driving-belt pulley f 2 between said bearings. These bearings are fastened by means of screws f to the portion A of the base, and are aligned with the shaft of the tension-pulley by means of set-screws f, held in lugs f of the said portion of the base. The tensionpulley F is fastened to a shaft f, which is hung to two sliding bearings f These bearings are held to the said portion of the base A by means of screw-bolts f which move 111 slots a in said portion of the base, and thus justable connecting-rods g are pivoted at g,

said connecting-rods being pivoted at g to two tension-arms of a rocking shaft G, which latter is provided wit-h a weighted lever-arm g and thus gives the proper tension to the saw 0.

The shaft f is provided with two metallic friction-disks 7L, which transmit their motion by means of their faces to the peripheries of two friction-disks 7L, made, preferably, of pressed wood pulp, and fastened to shafts 71. which are hung parallel to the feed-rollers above in bearings hereinafter described. The disks'h are longitudinally movable upon the shafts 7L3, but are caused to revolve with them by means of splines 7r. longitudinally moved upon said shafts and splines by. means of loose collars 7L5, fitted, as usual, in annular-grooves of the hub portions of the disks 71., and having radial pins 7b, to

They can be which connecting-rods 71 are attached. These connecting-rods are pivoted to the ends of two lever-arms h on a rocking shaft h which is suitably hung to the portions A and A of the base, as at h and extends to the front of the machine, where it is provided with a leverhandle it for convenient manipulation. By moving the said lever-handle up the disks h are moved toward the peripheries of the disks 7a, and thus have their speed increased, and

by moving the handle down said disks h are 0 moved toward the centers of the disks h, whereby their speed is decreased. The bearings 71,4 of the farther end portions of the shafts 71. are of ordinary construction; but

those 72. near the disks h are provided with 5 IOO end portions 11 in mortises of arms 1' on a horizontally-shding rod 1,. Said rod i is held in posit-ion by being passed through two vertical hollow prismatical guides a of the platform A, and it is moved by a hand-lever I, to which it is pivoted at i, and which is fulcrumed at i to the base portion A.

Each of the shafts 72 is provided with a conical wheel i at its end opposite the disk h, and by means of this wheel moves another largerconical wheel j, fastened to avertical shaft J. This shaft is secured longitudinally in a bracket-bearing j by the hub of the wheel j below and a collar 7' of the shaft above said bearing. The bracket-bearings 9 are fastened one to the base portion A and the other to an auxiliary baseportion A, connected with A by the bracket A The upper portion of the shaft J is provided with a spline 7' to which a sleeve 7' is so fitted as to revolve wit-l1 them and to slide up or down upon them. The sleeve 7' is hung in a bearing 7' to which it is vertically secured by an upper shoulder j and a bevelwheel f below. i

The bearings 3' are fastened to two slotted standards K, both of which are formed with the sawing-platform B. On the opposite side of the platform B are two other slotted standards K, arranged with those previously mentioned in two parallel lines standing at right angles with the longitudinal axis of the sawing-platform andhousing and supporting the bearings of the feed-rollers and feed-roller mechanism. The wheels 7' are geared into gear-wheels d on the journal end portions (1 of the lower feed-rollers D, which have their journal-bearings d lodged in the bottoms of the vertical slots is of the standards K. The upper portions of the sleevesj are provided with friction-wheels j of wood or pressed wood pulp, which engage alternately with the faces of metal friction-disks k united by a sleeve M, which can slide longitudinally upon shafts K and cause the same to revolve with them by reason of a spline k on said shaft. The wheels 9' are arranged between the disks 70 k which are separated at a greater distance than the diameters of the wheels j so that only one of said disks can at the same time be in contact with a wheel j and thus the. shafts K can be revolved alternately in opposite directions by bringing either the disk It" or k in contact with the wheels j". For the purpose of making such contact effective hand-levers k are employed, which have their fulcrums 70 70 near the shafts K and their short lever-arms in grooves 70 provided in the hubs of the metal disks. The shafts K are hung in bearings k k, of which those k are directly connected or formed with the standards K and those is formed with the bearingsj The shafts K are provided with bevel-wheels 7.2 which gear into gear-wheels e, fastened to screw-shafts e. The screw-shafts e have their bearings in the headsk of the slotted standards K, to which they are longitudinally secured by the hubs of said gear-wheels above and by collars 6 below. The portions of the screw-shafts 6 below their collars e are passed through the top portions of oblong frame formations e of the bearings 6 in the guide-slot formations e of which nuts e are fitted, through which the threaded portions 6 of the shafts e are screwed, said nuts 6 bearing upon springse", which rest and bear upon the body portions of the feed-roller bearings 6 In this construction the bearings e are held in proper vertical position by the shaft e in passing through the top portion of the frame formations 6".

By means of the hand-lever I the shafts J can at will be set in motion or stopped. When the shafts J are in motion, the lower feedrollers are also in motion, which motion is regulated at will by means of the hand-lever h, as before described. If the upper feedrollers E need vertical adjusting, the handlevers k 70 are manipulated as above stated. In order to adapt the machine to different thicknesses of boards, the sawing-platform B is made vertically adjustable, and is for this purpose provided with transverse lugs b, which are made to snugly fit the inner planed and finished walls of the hollow prismatic guides a and which rest upon the end portions Z of two forked levers L, the branches Z of which are fulcrumed at Z to lugs a of the guides of; and enter said guides through slots a therein. These branches Z are united by two transverse bars 1*, which are each provided with a toothed sector 1*. Said sectors occupy a central posit-ion with respect to the sawing-platform and the guides a and stand sufficiently apart from each other to permit a weighted double rack L to be introduced between them and to be geared into them. This rack L is provided with a downward shank Z, to which a weight 1 is attached, whereby the greater amount of weight of the sawing-platform B is balanced. A small percentage of this weight is supported bya handlever B, fulcrumed-at b and bearing with its inner end portion 12 against one of the lugs 19 of the sawing-platform. Thus when the handle portion 12 of the said hand-lever is moved down the sawing-platform is raised, and when moved up the sawing-platform is lowered. The handle portion b movesv along an upright guide a provided with notches a, into one of which the handle portion b is moved in order to hold it there during the operation of resawing.

The band-saw O is steadied by means of a slotted guide M, which slides upon a transverse prismatic guide m, fastened to two brackets a of the base portion A. The guide m is arranged parallel to the saw, so that the guide M does not leave the back of the saw when moved across the platform in order to suit different widths of boards to be sawed. The slotted guide M is provided with an arm m and an angular cap-bearing m which latter is, by means of an angular cap in and screw-bolts m", attached to the guide m, upon which it is caused to slide by means of a hand-lever M, which is fulcrumed at m to a bridge-plate k of the two front standards K, and by means of a slot m" moves a pin m of the cap-bearing m Below the guide m and precisely on the same level with the saw a spreader N is placed and fastened in a suitable manner to the brackets a' This spreader enters the kerf or slot made by the saw in the board and keeps the separated parts of the board from clamping the saw while passing through the rear feed-rollers.

One or more guide-rollers O are provided upon the platform B. These rollers prevent the board being sawed from being drawn by the saw out of its proper course so as to chafe against the standards, or run diagonally off from the platform B.

By employing the auxiliary base portion A in connection with the curved bracket A we are enabled to provide our invention with a feed motion in front of the saw without arranging the saw-pulleys at a greater distance from each other than in ordinary constructions, wherein the base portions A andA are not employed. lVe are also enabled to remove and replace the band-saw whenever desirable without disturbing its mechanism any more than to remove the hand-lever M, which could not be done if the base portion A were not supported by a bracket A connected to the base portion A, and thus sustained in a position which admits of the removal and replacement of the saw, there being at this point no obstructing standards or legs.

hen it is found that an end board or slab will furnish one or. more good parallel boards of useful thickness, it is introduced into the machine, and notwithstanding the uneven upper surface of such slab the upper feedrollers E will, by means of the yielding pressure of the spring 6, as set forth, adapt themselves to all changes of such upper surface while the slab is passing through said feedrollers. Thus the upper feed-rollers E will change from a right-hand inclined to a horizontal and then to a left-hand inclined position, and vice versa, keeping the true plane side of the slab hard down upon the lower feed-rollers, so as to deliver a parallel board.

Band-saws are usually arranged in vertical positions, and thus arranged they require two or three attendants to guide and remove the sawed boards by hand as they enterand leave the feed-rollers; but in our machine the saw is arranged horizontally and the boards to be sawed do not require any special guiding from the feed-rollers, as there is no danger of their fallin g over from a vertical to a horizontal position in leaving the feed-rollers and so interfere with the discharge of the finished boards upon the supporting saw-table, and consequently our machine does not require so many attendants.

\Vhat we claim as our invention is- 1. In a sawing-machine, in combination, a stationary supportingbase, a horizontal bandsaw, a vertically adjustable and laterallyguided board-supporting platform, and a roller-feeding mechanism attached to said platform and made adjustable to accommodate different thicknesses of boards and to regulate the pressure of the upper roller of the feeding mechanism, substantially as described.

2. In a sawing-machine, in combination, a stationary supporting-base, a vertically-adjustable and laterally-guided board-supporting platform, a horizontal band-saw of a fixed elevation and arranged on two pulleys F F, one of which is a tension-pulley, a drivingshaft f for the pulley F, having two laterallyadjustable sliding bearings f and adjustingscrews f, a laterally-adj ustable tension-shaft f for the pulley F, having two sliding bearingsf provided with two longitudinally-extensible adjusting connecting-rods g, and a rocking shaft G, having arms g and a weighted arm g substantially as described.

3. In a sawing-machine, in combination, a stationary supporting-base A, having an auxiliary base portion A, avertically-adjustable board-supporting platform, a horizontal bandsaw 0, having a fixed elevation, lower feedrollers D D, vertically-adjustable upper feedrollers E E, arranged in pairs, one pair in front and one in rear of the band-saw, and suitable mechanism for adjusting and operating the said rollers, the mechanism for operating the front rollers being on the part A and that for the rear rollers on part A, sub stantially as described.

4. In a sawingmachine, in combination, a stationary base A, having auxiliary base-supporting portion A, a vertically-adj ustable and laterally-guided platform, a horizontal bandsaw, a driving-pulley shaft f, disk It, a shaft 7L3, spline friction-wheel h,an eccentric shipping journal-bearing t', in which shaft 71.3 is hung, and a board-feeding mechanism, substantially as described.

, 5. In a sawing-machine, in combination, a stationary base, a vertically-adjustable and laterally-guided board-supporting platform, a horizontal band-saw, a board-feeding mechanism, the revolving vertically-fixed shaft J, suitable operating connect-ions between said shaft and the driving-pulley shaftf of the ma chine, splined friction-wheelj splined united friction-disks 7c kisuitable means for shipping said disks, lower and upper feed-rollers, and suitable connecting mechanism for vertically adjusting the upper rollers of the board-feeding mechanism, substantially as described.

6. In a sawing-machine, in combination, a stationary base A A, a vertically-adjustable and laterally-guided board-supporting platform, a horizontal band-saw, board-feeding rollers D E, a revolving Vertically-fixed shaft J, suitable operating connections between the said shaft and the driving-shaft of the machine, a spline bevel-wheel f and a bevelwheel d for operating the lower roller, and suitable mechanism for connecting the upper feed-roller E to the shaft J, substantially as described.

7. In a sawing-machine, in combination, a stationary supporting-base, a vertically-adjustable board-supporting platform, a horizontal band-saw 0, having a fixed elevation, a transverse guide M for the saw, arranged on an elevated transverse guiding-bar of the supporting-base, which extends entirely over the platform and beyond its side edges, and also slides over the spreader N, which extends entirely across the platform and beyond its edges, said guide being provided with a handlever M, and adjustedfllaterally thereby to accommodate wide as well as narrow boards, substantially as described.

8. In a sawing-machine, in combination, a base-support A A, a band-saw, a verticallyadjustable platform, two pairs of feed-rollers arranged one pair in front and one in rear of the bandsaw, and a spreader N of fixed elevation applied on brackets of the base and arranged between the saw and the rear pair of feed-rollers, substantially as described.

9. In asawing-machine, in combination, a stationary base A A, a band-saw arranged horizontally, a vertically-adjustable supporting-platform B, and lateral marginal guiderollers 0, attached to said platform, substantially as described.

10. In a sawing-machine, in combination, a horizontal band-saw, vertically-adjustable board-supporting platform B, fixed lower feed-rollers D, adjustable upper feed-rollers E, journal-bearing (a having vertical adjustment, screw-shaft e, nuts 8 and interposed tension-springs, the said journal-bearings being capable of adjusting themselves along with the upper roller independently of the nuts and screws, substantially as described.

11. In a sawing-machine, in combination, a horizontal band-saw, a board-supporting sawing-platform having lugs b,-a horizontal sawsupporting basehaving guides a levers L, having toothed sectors Z double rack L, having weight Z, and lever-handle B, substantially as described. 7

12. In a sawing-machine, in combination, the su pport-ing-base A, provided with bracket A and auxiliary supporting base portion A, horizontal band-saw O, pulleys E F, on which the saw is arranged, and a front feed mechanism supported upon the part A, substan tially as described.

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

GEORGE W. MASON. NOAH SHAW. GEORGE H. HOPPER.

Vitnesses: M. GRIFFIN, JOHN STEWART.

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