US415886A - Grinding-machine - Google Patents

Description

(No Model.)

W. C. F. STGKEL.

GRINDING MACHINE.

No. 415,886. Patented Nov. 26, 1889.

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L'Zy? hw UNITED STATES PATENT OFFICE.

VILLIAM C. F. STCKEL, OF ROCKAFELLER, 'ILLINOIS GRINDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 415,886, dated November 26, 1889.

Application filed J'uly 3,1889. Serial No. 316,431. (No model.)

To all whom, it may concern.-

Be it known that I, WILLIAM C. F. STGKEL, a citizen of the United states, residing at Rockafeller, in the county of Lake and State of Illinois, have invented a new and useful lmprovementin Grinding-Machines, of which the following is a specification.

My invention relates particularly to improvements in emery grinding-machines, and more especially to machines of this class which are designed to be used for general workas for sharpening tools of all kinds, polishing small surfaces, and the like.

rlhe different degrees of hardness of the metals to be ground and the various kinds of work to be performed by the grinding-Inachine necessitate the employment in a shop I of emery or corundum wheels of different deto be removed from the machine whenever the work to be done necessitated the employ- Inent of a disk of different grain or texture and replaced by the one required. In abusy shop, where the grindi11g-machine is Inore or less constantly in use, the frequent changes of the grinding-disks that have to be made, :for the reasons stated, cause delays which are both annoying and expensive; and it is my object to overcome this objection by providing an emery grinding-machine of the above class wherein any one of a number of differentlyconstituted grindingdisks may be brought into operative position without appreciable delay. It is further my object to provide such a machine of peculiar and improved construction, which will render it economical to manufacture, compact, durable, and otherwise desirable.

To the above ends my invention consists in the general and specific construction and combination of parts, substantiallyas claimed.

In the drawings, Figure l is atop plan view of au emery-grindin g machine of Iny improved construction; Fig. 2, a vertical sectional View of the same, showing parts in elevation and with other parts left out to avoid confusion.

A is the table of the machine, comprising .both tops B B.

the legs i and the double top B B. Below the table is a power-shaft C, provided with the fast and loose pulleys C and driving-pulley 02. Above the pulley C2the table is provided with an opening s, extending through Surrounding the opening S, and rigidly secured upon the top B', is a flanged ring D, having the inner peripheral rectangular surface r, affording a socket, and

the outer peripheral groove yr.

E is a rotatory annular support in the form of a short cylinder, having a flange E at its top and resting at its base loosely in the socket afforded by the surface r of the ring D. Around the outer circumference of the support E and secured thereto is a series of short brackets or lingers q, which extend over the surface of the ring into the groove r and serve to secure the support E without interfering with its rotation in the ring D. On its inner circumference the support E carries a series of brackets F, preferably of the form shown, which extend upward with their free ends in the plane of the surface of the ring E', and afford bearings p for radially-disposed spindles G, which extend toward their opposite ends through bearings p. Each spindle Gis provided between its bearings p p with a pulley G', and toward its outer free end it has a fast flange o, against whicha grinding-disk Z may be placed and held In position by a collar o and nut 02, all In a common manner.

The machine may be constructed with any desired number of spindles G, and each spindle should carry a differentlyconstituted grinding-disk. the drawings eight spindles are shown, which will serve to hold as many different grindingdisks as would ordinarily be found necessary. W'hen it is desired to use a certain disk of the set, the support E is turned to cause the spindle carrying the required disk to extend above the opening s, whereby its pulley G is directly above the Vdriving-pulley 02. The driving-belt H, which runs over the pulley C2, is then slipped over the pulley G when the grinding-disk will rotate with the turning of the shaft C.

The tops B B are hinged together at n, and toward their opposite ends is a rock-shaft lm, journaled in the top B. The rock-shaft m is In the machine illustrated inw IOO provided with a crank m and carries one or more cams m2, which extend against the under side of the `top B', for the latter to rest upon, and which operates with the rocking of the shaft m to raise or lower the top B. \Vhen the top B is raised, it also raises the support E, which produces tightening of the belt over the pulley G. Adjacentto the operative position of the pulleys G is a loose pulley Z on a fixed standard Z secured to the top B, and connected with the rock-shaft m is the automatic belt-shifting mechanism I, comprising a crank-arm k, rigid upon the rock-shaft m, a horizontally-disposed rod 7a', pivotally connected at one end to the end of the crankarm and similarly connected at its opposite end to a bent rod or frame e', extending vertically then laterally in a horizontal direct-ion through a guide opening (not shown) in the standard Z. On its horizontally-extending portion the rod 'L' carries pins i', which project on opposite sides of the belt.' To slacken the belt II and disengage the pulley G, the crank fm. is turned to rock the caln or cams m2 to the right, which lowers the top B vand causes immediate slacking of' the belt. Further turning of the crank rotates the arl'n lo, which forces along the rods Zo and i, causing the latter to slide through its guideopening in the standard Z and carry with it the belt, causing the latter at the end of the operation to rest upon the pulley Z, which is in the plane of the pulley G when the top B is lowered. The initial movement of the crank-arm 7c being in a downward direction, the shifting of the belt does not commence until the latter is slackened. Then the belt is thus removed from the pulley G', the support E may be turned to bring another grinding-disk into position, when by turning the crank m to raise the top B again the belt II, with the first movement of the arln Zr, is shifted upon the new pulley G.

To fasten the support E when a grindingdisk is brought into operative posit-ion and prevent its being turned by the pressure', brought to bear against it by the article which is being ground, I providea pivotal latch on the top B which may be caused to engage projections ZL on the rotatory support below each spindle G.

It is too obvious to require illustration that the form of gearing between the drivingport on the fixed support, a fixed power-shaft and driving-pulley, and a series of spindles, each carrying a grinding-disk, and belt-pulley mounted on the rotatory support and adapted to be connected in turn to the driving-pulley, substantially as and for the purpose set forth.

2. In an emery grinding-machine, the conibination, with a fixed support and with a fixed power-shaft and driving-pulley, of a rotatory support mounted upon and above the fixed support, anda series of horizontallydisposed spindles journaled on the rotatory support, carrying grinding-disks and belt-pulleys and adapted to be separately brought into line with the driving-pulley by turning' of the rotatorysupport and belted to the driving-pulley, substantially as and for the purpose set forth.

3. In an emery grinding-machine, the combination of a fixed support having the raising and lowering top B, provided with an opening s through it, a powe r-shaft carrying a driving-pulley below the opening s, a rotatory support upon the top B about the open, ing s, and a series of horizontally-disposed spindles journaled on the rotatory support, carrying grinding-disks and belt-pulleys and adapted to be'separately brought into line with the opening s by turning of the rotatory support, and belted to the driving-pulley through the said opening, the slackening and tightening of the belt being effected by the lowering and raising, respectively, .of the top B substantiallyas and for the purpose set forth.

4. In an emery grinding-machine, the combination of a fixed support, a ring D on the fixed support, a rotatory support mounted on the ring D, a fixed power-shaft and drivingpulley, and a series of spindles each mounted on the rotatory support and carrying a grinding-disk and belt-pulley and adapted to be connectedin turn to the driving-pulley, substantially as and for the purpose set forth.

5. In an emery grinding-machine, the conibination, with a fixed support and with a fixed power-shaft and driving-pulley, of a rotatory support mounted upon the fixed support, a series of horizontally and radially disposed spindles journaled on the rotatory support, carrying toward their outer ends grinding-disks and toward their inner ends belt-pulleys G and adapted to be separately brought into operative position in line with the driving-pulley by turning of the rotatory support, and to be connected in turn at their pulleys G bya belt H to the driving-pulley, and a support Z, adjacent to the operative position of the spindles to hold the belt H when it is not connected with a pulley G', substantially as and for the purpose set forth.

6. In an emerygrinding-machine, the colnbination of' a fixed support having the raising and lowering top B and fixed part B, provided with an opening s extending through them, a power-shaft carrying a driving-pulley below the opening s a rotatory support on the top B about the opening s, and a series of horizontally and radially disposed spindles journaled on the rotatory sup- IIO port, carrying toward their outer ends grinding-disks and toward their inner ends beltpulleys G and adapted to be separately brought into operative position in line with the driving-pulley by turning of the rotatory support, and to be connected in turn at their vpulleys G by a belt II to the driving-pulley,

and a support Z, mounted upon the part B, to extend near the operative position of the spindles at their inner ends, whereby the` lowering of the top B produces slackening of thev belt on a pulley G, so that the belt may be transferred to the support Z, and raising of the top B', when the belt is on a pulley G', )roduces tightening of the belt,

substantially as and for the purpose set forth.

7. In an emery grindingmachine, the combination, with the iXed support A, having the stationary top B, driving-pulley C2, below the top B, belt II, stationary belt-support Z and rotatory support E, carrying horizontally and radially disposed spindles G, provided with grinding-disks and belt-pulleys G', of the raising and lowering foundation B for the rotatory support, hinged toward one edge to the top B, the rock-shaft m, journaled in the support A and carrying one or more cams fm2, upon which the part B rests toward

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