US661132A - Grinder. - Google Patents

Description

A. L. REINER.

Patented Npv. 6, |900.

G B N DE R (Application med Apr. 1s, 1599.)

-3 Sheets--Sheet l.

(No Model.)

No. 66I,|32. Patented Nov. 6, |900. A. L. REINER. GRINDEB.

(Application led Apr, 13, 1899.] (No Model.) 3 sheets-sheet z.

MW WM/f A Y www@ No. 66:,l32. Pata t d N 61 A. L. mamen. n e v 90 G Bl N D E B.

{Applicaton med Apr. 1 8, 1899.)

(No Model.) 3 Sheets-Sheet 3.

ams Penas co.. moro-urna.. wAsNmcro is efficient in operation.

'hereinafter set forth, as shown in the accom,-

the invention.

port the working parts of the machine and to UNITED 'STATES PATENT EEICE.

ANDREW L. REINER, OE BLUE ISLAND, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, To THE PLANO MANUFACTURING COMPANY, or OHL CAGO, ILLINOIS.

GRINDER.

s'iSEcI'FIoATIoN forming peri ef Letters Patent Ne. 661,132, dated November 6, 1900.

Application filed April 13, 1899.1

The invention consists, substantially,in the construction, coinbination,'location, and arrangement Of parts, all as will be more fully panying drawings, and finally specically pointed out in the appended claims.

Referring to the accompanying drawings, and to the various views and reference-signs appearing thereon, Figure lis a top plan view of a machine constructed in accordance with Fig. 2 is a side elevation of the same looking from the grinderside, parts of the holder being in transverse section, the fly-wheel and parts of the holder being omitted. Fig. 3 is a similar view looking from the opposite side of the machine, parts beingl broken out to more clearly illustrate the operation. Fig. 4e is a broken detail view in section on the line 4 4, Fig. 2. Fig. 5 is a detached detail view of the cam-gear for raising and lowering lthe grinder-wheel.

The same part is designated by the same reference-sign wherever it occurs throughout the several views.

Reference-sign A designates the base of the machine and may be of any suitable construction and arrangement adapted to sup-` be supported upon a table, bench, or other suitable su pport, as indicated at B. The baseV A is provided with Aan arm or standard C, which is provided with a bearing D in the upperend thereof adapted'to receive the cylindrical hub E of a bracket F. Arranged to pass longitudinally through the bore of cylindrical hub E is a shaft, stud, or rod G, upon which is journaled to rotate the main drivegear H. The emery-wheel or grinder J is mounted upon a shaft K, journaled in the Serial No. 712.855. iNo model.)

outer ends of arms L M of a casting N, and

is rotated from the main dri ve-gear H through a pinion O, mounted upon said shaft K. The grinder or emery-wheel .I is held upon shaft K-by means of the pins P, and by re.

moving said pins the shaft K may be withdrawn from its bearings in the ends of arms L M, thus permitting of the4 removal of the eInery-Wheel or grinder and the substitution therefor of another when desired. This is a feature of my invention which is regarded as important, as it enables me to readily and easily change the emery-wheel or grinder to suit the character of work to be accomplished thereby.

The article Q to be operated upon by the grinder is held ina suitable clamp device, which in the particular form shown, but to which the invention is not limited or restricted, comprises a casting 6, pivotally mounted to swing about a stud 7, mounted in an eX- tension of the base A in convenient and suitable relation to the eInery-Wheel or grinder, as clearly shown in Figs. 2 and 3. Upon this casting 6 is pivotally mounted a carrier 8, the rocking or swinging movement of which toward the emery-wheel or grinder may be adjustably .limited and regulated by a set-screw 9, tapped through a lug l0 on said carrier and arranged to form an abutment or stop fora depending lug l1 O11 the carrier. 'lhe article to be operated upon is supported between the jaws 12 13. In the form shown in Fig. 3 the jaw 13 may be replacedy by a table 13', the article to be ground adapted to rest or to be 'supported "upon the top surface of the table therefore to be limited in this respect to the exact construction shown and described.

In the practical operation of an apparatus IOO embodying the principles of my invention it is desirable and important to impart to the emery-wheel or grinder not only a rotary movement, but also a vibratory movement, so as to cause the grinder to travel back and forth or along the article upon which it operates in order that its work may be accomplished efficiently and expeditiously. To effeet this result, I sleeve the arms L M of casting N upon the stud or bolt G to rock thereon, and I provide one of said arms, as L, with an extension beyond said stud or bolt and form the same into a yoke 15, between the arms of which is arranged to operate a cam 16. This cam is formed on or connected to a gear-wheel 17, journaled upon a stud i8, mounted in bracket F, and when the position of said gear is suitably adjusted it meshes with and is driven from a pinion 19, formed on or connected to rotate with the main drive-gear H. (See Figs. 1, 3, and 4.) From this construction it will be seen that not only is a rapid rotation imparted to the emery-wheel orgrinder when the main drive-gear is rot-ated through the intermeshing of said gear with pinion O on the shaft K, which carries said wheel or grinder, but a vibratory or swinging movement is also imparted thereto by reason of the rotation of the cam 16 between the forkarms of yoke 15. It will also be seen that since the arms L M are pivoted about the axis of rotation of the main drive-gear such vibratory movement does not interfere with the constant and proper mesh of pinion O with said main drive-gear.

If desired, and in order to secure a steady action of the apparatus when in operation the bracket F may be provided with an extension 20, (see Fig. 1,) in which is journaled a shaft 21, carrying at one end a fly or balance wheel 22 and at the other end carrying a pinion 23, arranged to mesh with and to be driven from the main drive-gear H. Thus it will be seen that the emery-wheel or grinder J is located on one side of the drive-gear H, and the balance-Wheel 22 is arranged approximately diametrically opposite on the other side of said gear, and hence the action of the apparatus is evenly balanced and steadied.

It may sometimes be desirable to operate the grinder Without imparting thereto the Vibratory movement above described. In order to accomplish this result, I adj ustably mountthe stud or bolt l8in a slot 23 in bracket F, (see Fig. 2,) whereby by loosening the thumb-n ut 24 said stud or bolt may be moved toward or away from the driving-pinion 19, and hence carrying the gear 17 into or out of mesh with said pinion, as indicated in the drawings. The grinder oremery-wheelmay then continue to operate Without being Vibrated. If desired and in order to lock the emery-wheel or grinder in a fixed position, the bracket F may be provided with a rib or projection 25, adapted to engage between two of the teeth of gear 17 at some point in the periphery thereof, as clearly shown in Fig. 3, and when thus engaged the parts are held or locked in stationary position by clamping upon thumb-nut 24, thus rigidly holding the gear 17. By this means I am also enabled to adjust the height of the emery-wheel with reference to the article upon which it operates. This result is accomplished by adjustably clamping the depending arm 26 of bracket F to the standard C (see Figs. 3 and 4) by means of the bolt 27 and clamp-nut 28. The desired adjustment is secured by arranging the bolt 27 to pass through an elon= gated slot 29 in the standard C, thus securing a rotary adjustm ent of said bracket about the axis of rotation of the main drive-gear. By this means the elevation of that arm of bracket F Which carries the locking rib or lug 25 may be regulated, and since the arms L M, which carry the eatery-wheel, are loosely sleeved to rock upon the same axis and cam 16, carried by stud 18, is mounted in the bracket F and works in the yoke of said arm, it will be seen that the elevation of the emery- Wheel may be thus readily adjusted. This construction also enables me to adjust the movement of the emery-wheel to suit the height of the article upon which it operates during the vibrations thereof, this result being accomplished by suit-ably swinging or adjusting the bracket F upon stud G by loosening nut 28 and moving the bolt 27 in slot 29 to the desired point and then again clamping the parts together.

In the operation of a grinder embodying the principles above described a rotary movement is imparted to the main drive-gear H, and this in turn transmits rotation to the grinder or emery-wheel through the in tei-meshing of said gear H with pinion O. Ifit is desired to impart a Vibratory movement to the grinder during its operation, the stud 18 is suitably adjusted in the slot 23 of bracket F, so as to cause the cam-gear 17 to mesh with pinion 19 on the hub of the main drive-gear, and the rotation of said cam-gear with the cam portion 16 thereof working between the forkarms of yoke 15 causes the grinder-supporting arm L, and with it the casting N and arm M, to vibrate about stud G, thus causing the grinder to make regular vibratory excursions along the article upon which it is operating and without arresting or interfering with the rapid rotation thereof. In case it should be desired to omit the vibratory movements of the grinder and to operate the same in stationary position, the stud 18 is adjusted laterally in its slot, so as to cause the, cam-gear 17 to be moved out of mesh with its drivingpinion 19 and into position for the rib 25 to IOO IOS

IIO

engage `between the teeth of said gear, thus locking the supporting-arm L against vibratory movement. If it is desired to adjust the elevation of the grinder, the n ut 2S is loosened and the bracket F is adjusted upon standard C and angularly about the axis of the main ein drive-gear until the desired elevation is secured,and then the nut 28is again clamped up.

Rotation may be imparted to main drivegear H by hand or otherwise. In the particular form shown-to which,l however, the invention is not limited or restricted-I provide said gear with a handle 30, by which the desired rotation is imparted thereto by hand.

In the case where a movement of the grinder with reference to or along its work is imparted and in order to relieve the operator of the work of raising the grinder againstits weight during such movement, Iand hence with a View to securing an easy operation of the may chine, I arrange a spring` 3l to exert its tension in a direction to raise the grinder, thus assisting in the work of operating the machine. This spring may be arranged in many different ways for securing the desired result. I have shown a simple and eicient arrangement wherein I coil said spring upon the cylindrical hub E and engage one end thereof against a lug 32 on the standard or arm C, and the other end is arranged to engage under the casting N. By this arrangement it will be seen that the swinging or vibrating movement of the grinder J ina downward direction is against the tension of said spring, which tension is thus stored up and is expended in assisting in the raising of the weight of the grinder when it is moved in the opposite direction. Thus the spring counterbalancesthe weight of the grinder, and hence secures an easy movement of the machine.

It is obvious that many changes and variations in the details of construction and arl rangement of parts would readily suggest themselves to persons skilled in the art and still fall within the spirit and scope of my invention. I do not desire, therefore, to be having an extension at the other end beyond its pivotal point, an eccentric contacting such extension to vibrate the frame and the grinding-wheel, a gear actuating the eccentric, and a main driving gear-wheel rotating the grind.,- ing-wheel and having a pinion meshing with the eccentric-actuating gear.

2. A grinding-machine comprising a base portion or support, a stud mounted therein, a rotatable grinding-wheel, a frame pivoted on said stud, carrying at one end the grinding-wheel and having a bifurcated arm eX- tending beyond its pivotal point, an eccentric located between the bifurcations of said arm and adapted to vibrate the frame, a gearwheel actuating said eccentric, and a main driving gear-wheel arranged on the stud, and adapted to rotate the grinding- Wheel and having a pinion to actuate the eccentric-ac-` tuating gear-wheel.

In witness whereof I have hereunto set myy

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