US567637A - Grinding-maghine - Google Patents

Description

2 Sheets-Sheet 1.

(No Model.) y

lA. R. CLIZ'BE.

GRINDING MACHINE.

No. 5677,63?. Patented ept. 15, 1896.

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` (No Model.) l 2 sheets-sheet 2.

A. R. eLIzBN.`` GRINDING MACHINE.

r Patented Sept. l, 1896.

UNITED STATES i PATENT OFFICE.

ADELBERT R. CLIZBE, OF CHICAGO, ILLINOIS.

SPECIFICATION forming part of Letters Patent No. 567,63*?, dated septemberi 5, 189e. Application med November 2,1895. serrano. 567,705. (Nonna.)

To all whom, t may concer/t.'

a citizen of the United States, and a resident of the city of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Grinding-llachines, of which I do declare the following to be a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

The present invention has relation to that class of grinding-machines more vparticularly designed for the grinding of harvester-knives and the like, in which the grinding-wheel is carried upon a swinging frame adapted to be moved automatically in the direction of the length of the teeth as the wheel revolves.

The invention consists in various novel features of construction hereinafter described, illustrated in the accompanying drawings, and particularly pointed out in the several claims at the end of this specification.

Figure l is a view in side elevation of the machine embodying my invention. Fig. 2 is a front view, the knife-holder being omitted. Fig. J is a viewin side elevation from the left side of the machine. Fig. et is a view in central vertical longitudinal section. Fig. 5 is a detail plan view of the base-board with the knife-holder thereon, other parts of the machine being omitted. Fig. 6 is aviewin longitudinal section showing the position of the grinding-wheel frame when the machine is to be used as an ordinary grinding-machine- Fig. 7 is a detail view of thegrinding-wheel shaft.

From the base A of the machine rise the standards B and B', between the upper ends of which is pivotally sustained the swinging frame C, that carries the grinding-wheel D. Preferably the side bars of the swinging frame C have pivot lugs or trunnions e and c cast therewith, theselugs setting within-suitable journal seats or bearings at the top of the standards B B. In order to permit the grinding-wheel D to be readily inserted into and removed from'the swingingframe C, I prefer to form the lower ends of theside bars of the swinging frame with seats c2, adapted to receive the Shanks of the j ournal-bearing blocks d, wherein the shaft d' of the grinding-wheel vD will be journaled, these blocks (l being con- I Be it known that I, ADELBERT R. CLIZBE,

`veniently attached to the lower ends of the side arms of the swinging frame by means of bolts c3.

`drive-sh aft Il, to one4 end of whichis connected the drive-wheel F, furnished with. a handle f, whereby it can be conveniently turned. To the opposite end of theV drive-shaft E is fixed a pinion e, that engages with an idler-pinion g, that is loosely mounted upon the pivot-stud c, that projects sufficiently through the standard B' to receive this idler-pinion, and with the pinion g meshes a gear-wheel II, that is carried by the eccentric-shaft 71 that is journaled in the bearing h of the standards B B'. Upon the shaft 7L are fixedy the eccentrics Il', these eccentrics setting within the yokes C, that project rearwardly from the side bars of the swinging frame C. The shaft CZ, to which the grinding-wheel D is fixed, carries at onel end a drive-pinion D', that meshes with the main drive-wheel F, as clearly shown in Fig. l. The drive-pinion D is carried upon the swinging frame C at a distance from the center of oscillation equal to the radius of the main drive-wheel F. Consequently the wheel F and the pinion D will be maintained in constant gear notwithstanding the swinging of the frame C.

From the construction of parts thus fa-r defined it will be seen that as the main drivewheel F is revolved by means of the handle f a back-a-nd-forth swinging movement will be imparted to the frame C by means of the eccentrics II engaging with the yokes C at the back of the swinging frame C. Consequently the grinding-wheel ,D will be swung back and forth, while at the same time the pinion D/, being in mesh withthe gear-wheel. F, will impart a rotary movement to the grinding-wheel D. In this class of machines it is very desirable that the swinging frame that carries the grinding-wheel should `be firmly held during its backend-forth movement, so that a uniformity of action. of the grinding-wheel upon the harvester-knife may be had, and it is manifest thatinasmuch as the eccentric-yokes C are arranged at opposite ends of the swinging frames (being preferably formed in piece with the side-bars) Through the upper ends of the side larms of the swinging frame C passes the main IOO both sides of the swinging frame will be oscillated uniformly, and consequently a uniform back-and-forth movement will be imparted to the grinding-wheel D. In prior machines where the swinging frame has been oscillated by a connection at one side thereof it has been found that the irregularity of movement of the swinging frame has resulted in an uneven action of the grinding-wheel upon the knives; but bythe employment of eccentrics a uniform movement of the swinging frame i is insured.

In order to hold theharvester-knife during the grinding operation, I employ the improved construction of knife-holder next to be described. Upon the base A is mounted an adjustable block M, having a slotm therein, through which passes the bolt N, that passes through a hole in the base A, and is provided at its upper end with a thimble-nut n, whereby the position of the block M can be determined. The front end of the block M is provided with a hook m', that enters a hole or seat in the end of the bar P, to the front end of which bar the kn ife-restR is pivotally connected. Preferably the barP has a yokeshaped end between which set the lugs r, depending from the rest R, and through the end of this rest is formed a long slot r, through which passes the shank s of the clamp-barS. A pivot-pin T passes through the arms at the end of the bar P, and through the lugs r, depending from the rest R, and through the shank s of the clamp-bar S, the same pivotpin thus serving to unite the several parts. The rest-plate R is formed with an upwardlyextending shoulder or angular portion r2, against which will bear the chang-bar t of the harvester-knife V, and from the angular portion r2 of the rest-plate extend the arms r3, that willrest upon the base A, these arms being separated a sufficient distance to afford proper bearings for the teeth of the harvester-knife, as seen in Fig. 5. The clampbar S has forwardly-projecting blocks s adapted to bear against and firmly hold the harvester-knife on the arms r3 of the restplate R, and at the rear of the clamp-bar S is formed a lug s3, against which will bear the upturned shank w of the clamp-handle WV, the shank of this handle IV being pivoted, as at w', between the forwardly-projecting arms r3 of the rest-plate R. The forwardly-projecting lug s3 is of such size that the clampbarv S may be turned upwardly so as to permit the harvester-knife to be inserted in place under the clamp-fingers s'. By this means the harvester-knife can be quickly placed within the holder, and the necessity of sliding the knife endwise into the holder is avoided.

From the foregoing description it will be seen that when a harvester-knife is to be ground the clamp-bar S and handle IV will be turned,after which the harvester-knife will be inserted in place with the chafmg-bar V resting against the angular bar r2 of the rest-plate R. The handle IV will then be turned downward and forward, as shown by Fig. 3, thereby causing the clamp-bar S to be turned about its pivot-point until the fingers s bear firmly against the harvester-knife. Inasmuch as the rest-plate R is mounted in manner free to turn about the pivot-point T, it is obvious that thc rest-plate can be tipped more or less as the grinding-wheel swings forward and backward and is at all times within easy control of the operator. The adj listing-block M enables the knife-holder to be set in proper position for the grinding of any size of knife.

Vhen it is desired to use the machine as an ordinary grinding machine, a cylindrical wheel may be substituted for the wheel D, and in order to bring this wheel into more convenient position the shaft E will be removed from the journal-bearings at the top of the swinging frame. The eccentric-shaft 7i., the eccentrics HQ and the gear-wheel H and pinion g will be removed and the swinging frame will be turned about thel trunnions c c to the position seen in 6 of the drawings, after which the shaft E will be passed through the supplemental bearing-seats b4 at the top of the standards B B and through the bearing-seats at the upper end of the swinging frame, thereby holding the swinging frame in horizontal position. The main drive-wheel F will still be in gear with the drive-pinion D', this pinion being made somewhat broad in order to mesh with the gear-wheel F when the hub f2 of this wheel is brought outside the standard B, as shown in Fig. 6. IVith the swinging frame thus turned to horizontal position and rigidly held the grinding-wheel will be driven from the main drive-wheel F and the machine can be used for ordinary grinding purposes.

The shaft CZ', on which the grinding-wheel D is mounted,is preferably of the construction shown in Fig. 7 of the drawings-that is to say, the shaft has plain portions at its ends to set within the bearing d and is provided with a collar d5, from which extend webs or lugs d6, that enter seats formed in the bore of the grinding-wheel and hold it securely upon the shaft. The opposite end of the shaft d is formed with a threaded portion to receive the usual retaining-nut.

It is manifest that the exact details of construction above set out maybe varied by the skilled mechanic without departing from the spirit of the invention and that features of the invention may be employed without its adoption as an entirety.

Having thus described the invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a grinding-machine, the combination with the main standards, and with the wheelcarrying frame pivoted thereto, of a shaft journaled in said standards, and provided with an eccentric, said wheel-carrying frame being provided with a bearing-yoke for engaging said eccentric, a main drive-shaft and gearing intermediate said first -mentioned IOO IIO

shaft and said drive-shaft, substantially as described.

2. In a grinding-machine, the combination with the main standards and with the wheelcarrying frame pivoted thereto, of a shaft journaled in said main standards and provided with two eccentrics, yokes at each side of the swinging frame engaging said eccentrics, a train or gear for driving said shaft, a grinding-wheel mounted in said swinging frame, a pinion on the shaft of said grindingwheel and a main drive-shaft having a pin-t ion at one end in gear with said first-mentioned shaft and having a gear-wheel at its opposite end meshing with the pinion on the grinding-wheel, substantially as described.

3. In a grinding-machine, the combination with the main standards having a supplemental set of journal-bearings, a swinging frame pivoted to said standards, said swinging frame being provided with bearings for a drive-shaft arranged at the same distance from the pivot-bearings of the swinging frame as are the supplemental bearings of the standards, whereby said main drive-shaft may be passed through both the bearings at the back of the swinging frame and the supplemental bearings of the main standards, substantially as described.

4. In a grinding-machine, a knife-holder comprising an adjustable bar, a rest-plate pivoted to the forward end of said adjustable tical direction and provid ed at its front with a handle, a clamp-bar for holding the knife in position upon said rest-plate, said clampbar having fingers adapted to extend over the knife-teeth and having a part extending into position tobe engaged by the handle, substantially as described.

7. In a grinding-machine, a knife -holder comprising a rest-plate pivoted to swing in vertical direction, a handle at the front of said rest-plate and whereby it may be manip- `ulated, a pivoted clamp-plate having a part adapted to be engaged by said handle and having fingers adapted to clamp the knife against the rest-plate, substantially as described.

ADELBERT R. OLIZBE.

Witnesses:

GEO. P. FISHER, J r., y FRED GERLACH.

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