US1827270A - Grinding wheel guard - Google Patents

Description

Oct. 13,1931. G. E. SMITH GRINDING WHEEL GUARD Filed Sept. 13, 1929 INVENTOR ATTORNEY.

' ELECTRIGALTOOL COMPANY; 0 F "CINCIHNATLQHIO,A sconronnrlon' or 0 f i i HEE UAR This invention relat esto grinder appliances and isparticularly directed-,to a guard or hood/for use on grinders, the[ guard having features of adjustability and adapted to encloseuthe' grinding or emerywheel for the p r pose of 1 preven'tingginj dry I to" the worker, and

pletely" protects the Worker" by efficiently housingTthe wheel to conform 'Jal1 the requiren ents of the safety code without loss Y of efficiency or interference with 'the applifc'a tion' of the articles' tobel ground-tothewheel. 1 It is an obj ect' of this inventionto provide a closure or guard for a grinding wheel which 1 is conveniently a dadjustabl attachedto thefrarne oflthe'grinder.

The 'de'f si gned for rotative adjustment concentrically with "the" wheel for disposing the opening,

' through which the articles .to be groundxare applied, at the proper angle and elevation.

It is another object of this invention to pro Vide a wheel guard of the abovenature which. is adjustable toward and from thefworking P 7 side of the wheel periphery to compensate for the Wear of the grinding'wheel and for dis-, posing the guard in proximity to the wheel" the articles are,

adjacent the point wherev applied. o

It is another object of this lnvention to provide a guard arrangedso as to efliciently direct the dust and grinding accumulation and flying particles into an exhaust duct; the connection of which duct is adjustable relative to the wheel.

It is another object of this invention to provide a guard having a door; which door, in combination .with the adjustable upperv section of the guard, permitsthe removal and replacementof grinder wheels without moving the entire guard fro'm'the grinder. j

Other objects and advantages relate to the general construction ofthe device and will be apparent from the description .of the accompanying drawings, in which:

Figure 1 isa front vlew of the gu'ard in a. position on the frame or casing of a grinder,

e the guard enclosing thewheel,

r collection of the dust, grind- 'ingfra'ginentaryof the grinder,"

-F'gure 2 '-1s a sect'onal. view t and form of the guard.'-

doorslightly open.

r The idevlce compr ses, in general; a main" casing 5' attachable to the frame of the grinder for surrounding the lower portion or mai ken i line p 2-2:, Figure "1, illustrating the; fabrication V Gnome E. SMITH, or covInG onl'; IQi 'JPUG,KY,".assiieuqoiI110YTHE Umrrib STATES; 7

this view be jority of t the grind-ing Wheel 15, a cap {6 3dr. j'ust'ably'mount'ed' on themain casing for adjustment tangentially of thel grinding,

wheelrelativeto the peripheral surface there'- ofand a door "7 hinged to the main' 'casing v and openingendwise' or swinglng from an axial: position relative to the'l grinding wheel, Referring to the drawings and describing azparticular embodiment of the invention in i detail zthe main casing 5 includes a splitring portions extending from' thefinner side e 7 ,thereof ya olanipingor draw bolt9 traversing. l

'theaiears. 10 ofithering portion; The ring r endgof'the' hub llfofthe grinder frame'ad i 'ortio'n 8 is vadapted to encircle theextending jacent the inner 'fa'ce'Tot; the grinding wheel,

idisposing :'the"-' main";portion or the" casing qabout :therear andl owe i sides 'of the grinding l2-is providedpintegrally formed, 1 iw ithtthew 'casingfandrdepending from the lower. portion thereof, this snout extending from a throat 1-3,"which"throat is'to'wa rd the ,open' sideof"the casingand belOw'the g'rind- A; snout ing point. Any sort 'of ffiexible conduit,

-=shown in: dot and dash lines at il lj'may be attached' to the snout which is directed re'ari i wardly for conveying the grindings; dust, abrasive, etc, fro'm'the vicinityz 'ofthe'oper 5 atora'i A suction device may be "provided at 'the end of the hose for forcibly removingv the.

fly i ng pa'rticles withintheguar'd or'hood.

ITh'e door .7 is hinged to the main casing at bowl shape to clear thehubi 17 of the grinding :wheel and; straight out across its topin the same plane with thej straightupper edge 1 8 one side'ithereof a's at' 16,= this door beingofacross the topo? provided, one, namely, 19 extending outwardly from the door, and the other, namely 20, extending outwardly from the casing 5, these lugs having their upper surfaces flush with the straight upper edges of the door and casing respectively. In the same plane with the lugs andstrai ght edge of the door, a rearwardly extending surface is provided as the top of a lug 21 having an elongated slot therein. The coverof adjustable section 6 of the guard is supported on the surfaces just described and has an adjustable and sliding hinge connection to the casing by virtue of'the following arrangement.

A hinge bolt 22 for a rotative' connection of the cover plate to the casing traverses the elongated slot 23 of the casing and is secured in spaced ears 24 extending downwardly from thecap. The lugs 19, of the casing are provided with screw-threaded bores into which are screwed clamping screws 26 travers'ing elongated slots 27 in a horizontal flange 28 of thecover plate. All the slots mentioned are disposed in parallelism for permitting slidin motion of the coverplate the casing, the rear. bolt providing the hinge. l

A lug 29 is provided in the outer periphery of the cover toward the forward end thereof, this lug having a bore therethrough for mounting the holder for an eye shield (not shown) adapted to transparently cover the point at which the work is being applied. 7

The manipulation ofthe guard is as follows:

Assuming that it is desired to place the entire guard on the machine, it is necessary-to remove the grinding wheel.v The guard is slid as a unit onto the end of the'bearing eX- tension" of the grinder frame, and clamped thereto by meansrof the draw bolt in the split ring The grinding wheel is placed in position on the driving shaftwith the cover lifted and the door swungsback as illustratedin the perspective view. The door is thenswung shut and the cover plate slid on its supporting surface until its forward edge is properly spaced from the periphery ofthe grinding wheel, whereupon the bolts traversing, the

two forward slots are tightened, the hinge bolt being set in position for free swinging movement of the cap.

As wearing of the wheel takes place, the cover is moved inwardly. Theentire guard is rotatably adjusted for properly disposing the open side of the guard for efficient application of the work to the surface of the grinding wheel, this being done after loosening the clamping'bolt on the split ring portion. The

exhaust passageway or snout may be at any point inasmuch as a flexible hose is used.

Having described my invention, I claim: 1. In combination with a grinding wheel of a grinder, a cover for the grinding wheel, comprising, a main casing mounted on the reward frame of the grinder concentric to the grinding wheel for rotative adjustment relative thereto, and a one-piece cap hinged on the main casing for enclosing the upper portion of the wheel and having its front edge adjustable-toward and from the peripheral surface of-the grinding wheel, said adjustmentmove ment of the cap adapted to be imparted entirely independent of the hinged movement thereof.

2 A grinder wheel guard, comprising, a main casing having'its forward side open, and a snout formed integral therewith extending from the lower rear side, said casing of sectional form, the upper section thereof hinged to the lower section for swinging movement away from the lower section for uncovering the grinder wheel and adjustable transversely to the axis of grinder wheel rotationfor spacing the forward end of the upper section relative to the grinder wheel periphery, and a door swinging outwardly from the end face of the casing.

3. A grinder wheel guard, comprising, a main casing having a split ring attaching portion at one side, and a door hinged at the other side, a cover slidably mounted on the top surface of the main casing, said cover slidably hinged to the main casing and providing flanges at its forwardend, and attaching means traversing said flanges and entering said main casing for securing the cap in position on the upper surface of the casing.

In witness whereof, I hereunto subscribe my name.

GEQRGE E. SMITH.

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