US1078551A

US1078551A - Grinding-machine.

Info

Publication number: US1078551A
Application number: US74256513A
Authority: US
Inventors: Edward O Partridge
Original assignee: Individual
Current assignee: Individual
Priority date: 1913-01-17
Filing date: 1913-01-17
Publication date: 1913-11-11
Anticipated expiration: 1930-11-11

Description

E. O. PARTRIDGE.

GRINDING MACHINE.

APPLICATION IILED JAN. 17, 1913.

. 1 078 551 Patented Nov. 11, 1913.

COLUMBII PLANOORAPH io wAsl-lmo'romn. c.

E. 0. PARTRIDGE.

GRINDING MACHINE.

APPLICATION FILED JAN. 17, 1913.

1 078,551. Patented Nov. 11, 1913. 3 SHEETS-SHEET 2.

oeqv aw E. O. PARTRIDGE.

GRINDING MACHINE.

APPLICATION FILED JAN.17,1913.

1,078,551, Patented N0v.11,1913.

3 SHEETBSHEET 3.

'lllilllllllfllllllm ma; 42 655 ea: J fZ-f/ 7170 7 as rnrn'r OFFICE.

EDWARD O. PARTRIDGE, OF'GHICAGO, ILLINOIS GRINDING-MACHINE.

Specification of Letters Patent.

Application filed January 17, 1913. Serial No. 742,565.

make and use the same.

My invention relates to grinding machines and articularly to machines employing abrasive wheels made of emery or carborundum. Its objects are to provide a safety guard or hood which will be readily adjustable in position to conform to variations in the diameter andthickness of the wheel, and in the spacing of the latter long1- tudinally of the shaft upon which it is mounted; in which the safety hood or shield may be securely clamped in any desired position, and in which auxiliary supports will add to the firmness and the safety afforded by the protecting hood or shield. I accomplish these objects by the construction shown in the accompanying drawings, in which:

Figure -1 is a fragmentary side elevation of a grinder embodying my invention. Fig. 2 is a fragmentary front elevation of the same. Fig. -3 is a view similar to Fig. 1 but with the guard-hood adtary section through Fig. 1 along justed to protect a smaller wheel. Fig. .4 is an enlarged fragmentary rear view,

partly insection, of the grinder of Fig.

1'. Fig. -5-- is an enlarged fragmen the line 55, with the hood shifted laterally of its supports. Figs. 6 and 9- are 1 side elevations of alternative embodiments of my invention. Fig. 7 is a vertical section through Fig. 6-- along the line elevation of a portion of the grinder shown in Fig. -9. Fig. 11 is a fragmentary section through an alternative form of hood and auxiliary support.

In the drawings, the abrasive wheel 1 is mounted upon a shaft 2, being laterally clamped between washers 3 and a collet 4 by a nut 5 engaging the threaded end of the shaft. The shaft 2 is mounted on a bear- 111g 6 forming part of a support, this support consisting preferably of a column 7 havin a Patented Nov.11,1913.

horizontal table 8 positionedbeneath tie wheel. The shaft 2 is revented from movmg longitudinally of tie bearing 6 by the collet 4: and by the hub 9 of thedriving pulley 10, which latter is secured to the shaft at the opposite side "of the bearing fromthe abrasive wheel.

The table 8 is provided at one edge with trunnions 11, to which

links

12 and 13 are pivotally connected by bolts 1 L and 15, these links being pivotally connected attheir other ends by bolts 16 and 17 to an inflexible guard-hood 18 adapted to partly house the upper portion of the grinding wheel 1. The safety shield or hood 18 is preferably made of two symmetrical parts, formed of sheet steel,

each of the said parts having a flange por tion 19 adapted to depend at one side of the wheel, and a web portion 20 projecting outwardly of the hood proper. When the hood is thus made of two parts, the latter are seand each of which bolts is secured to the said table by nuts 31. When the

bolts

23, 24 and 25 are thus assembled, they constitute a substantially vertical link formation which acts as a rigid auxiliary support or brace for the guard-hood. When the grind ing. wheel is decreased in size, either by substituting one of smaller diameter orby the gradual wear upon the periphery of the wheel, the hood may be kept in a proper guarding position by tilting it downwardly upon the

links

12 and 13, the vertical brace link being correspondingly. adjusted by moving the nuts 26 upon the bolts 24 and Instead of having the

rear ends

27 and 28 of the hood supported by links laterally spaced to correspond to the. spacin between these

links

12 and 13, I prefera lyspace these links farther apart than the outer edges of the said rear ends, thereby providing room for washers 29 upon the bolt 16, as shown in Fig. 1-. Bytransferring some of these washers from one side to the other, as in Fig. --5-, the hood may be moved laterally of its supports (or longitutively shielding the' wheels. guard-hood or shield is thus supported by dinally of the shaft of the grinder), thereby permit-tin it to be centered over the wheel with whees of varying thicknesses, or with various thicknesses of washers 3 an'd'guard disks 30. To allow for such a lateral motion .of the, hood, the perforations 26in the table 8 are elongated into slots extending parallel to the shaft 2.

While the guard of my 1nvention may be connected to the support by a single link or pair of links, as in Figs. -6.. -8-, 9

lines in Fi 8- thereb ermittin of z: a Y P V a different. classes of grinding while still effec- VVhen the two pairs of links, as in Figs. -1 and 3, the substantially vertical auxihary brace may toe-omitted if desired, although I still prefer to employ the same as giving the hood increased stabillty in case pieces of the abrasive wheel should be thrown centr1f :ugally against the hood by the breaking of the-wheel.

Instead of passing the horizontal portion 23 of the auxiliary link through perforations 22 in the rib upon the hood, this rib may be provided with. notched formations 36 adapted interchangeably to engage the link portion 23, as in Figs. 9. and 11. The latter shows a construction in which the horizontal portion 23 of the auxiliary link engages notches int-he cast rib 33 upon the hood while the

portions

24 and 25 have shoulder formations 34 adapted vertically to engage lateral flanges 35 upon the hood. Instead of making the hood of two ad- I joined sheet metal parts, it may be made of a single integral casting 37,. asv in Figs. So also, the links supporting the hoodat its rear end may be united into asingle cast link 38 and the latter may be pivotedtothe support below the table, as in Figs. 9- and l0. In View of these and of other modifications which may be made without departing from the spirit of my invention, I do not wish to be limitedto the details of construction or arrangement as herein disclosed, but claim as'new:

1. Ina grinder, a shaft; an abrasive wheel mounted thereon; support for the shaft; a guard-hood adapted to partially cover the wheel; and linkmembers connecting the guard-hood with the said support, "one of the said link members being adjustable as to its point of engagement with the guardhood, and also adjustable as to the distance 'between' its points of engagement with both the guard-hood and the said support.

2. Ina grinder, a shaft; an abrasive wheel mounted thereon; a support for the shaft; an inflexible guard-hood adapted to partially cover the wheel; and link members connecting the guard-hood with the said support, one of the said link members being "adustable as to its Joint of en a ement with the guard-hood.

8. Ina grinder,'a shaft; an-abrasive wheel mounted thereon; an inflexible guard-hood adapted to partially cover thewhe'el, and a pair of substantially parallel links pivotally connecting one end of the guard-hood with the said support, the-saidlinks being" joined to the guard-hood at vertically separated points. f

l. In a grinder,'ashaft; an abrasive wheel mounted thereon; a support for the shaft;

periphery and sides of the wheel, and a plurality of links pivotally connecting one end of the guard-hood with the said support;

the said links being disposed substantially a guar l-hood adapted to partially'cover' the I vertically of each other, and being adjustable with respect to the said support-transyersely of the'hood.

5. In a grinder, a shaft; an abrasive wheel mounted thereon; a support for the shaft;

a guard-hood adapted to partially house the periphery'and sides of the wheel; and a link supporting the guard-hood, the said link being pivotally connected at its opposite ends to one end of the guard-hood'and to the support respectively; the guard-hood" being adjustablewith' respect to the said link in direction parallel to the said shaft. 6. In a grinder, a shaft; an abrasive wheel mounted thereon; a support for the shaft;

a guardhood adapted to partially house the periphery and sides of the wheel; and a link pivotally connecting an end portion of the guard-hoodvwith the said support; both ends of the said guard-hood being movable transversely of the shaft; and a brace connecting l another portion ofthe guard-hood with the support, there being coacting formations upon the guard-hood for nterchangeably engaging the said brace.

7. In a grinder, a shaft; an abrasive wheel mounted thereon; a support-for the shaft; an inflexible guard-hood pivotally mounted at one of its ends upon the said support and adapted partially to-cover the said wheel, there being a stifl ening rib upon the said guard-hood; and a brace connecting the said guard-hood with the saidsupport, there being coact-ing formations upon the said stiffening rib for interchangeably engaging the said brace;

8. In a grinder, a shaft; an abrasive wheel mounted thereon; a support for the shaft;

an inflexible guard-hood pivotally mounted at one of its ends upon the said support and adapted partially to cover the said Wheel, the said guard-h0od comprisin a pair of laterally adjoined members having contacting Web portions extending outwardly of the hood; fastening means for securing the said Web portions to each other; and a brace connecting the said laterally adj oined hood 10 members With the said support.

In testimony whereof I have signed my name in presence of two subscribing wit- Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.