US2491269A

US2491269A - Safety guard for buffing machines

Info

Publication number: US2491269A
Application number: US736486A
Authority: US
Inventors: John M Kelly
Original assignee: Gerity-Michigan Corp
Current assignee: Gerity-Michigan Corp
Priority date: 1947-03-22
Filing date: 1947-03-22
Publication date: 1949-12-13
Anticipated expiration: 1966-12-13

Description

J. M. KELLY SAFETY GUARD FOR BUFFING MACHINES I Dec. 13, 1949 Filed March 22. 1947 KKK CIDDDCIUDUDDDDOIUCIDUD OC 22222222 2 2 2 2 2 22 22 2 2 22 2 2 5 22 2 u .2 2 n. 22 m 2 2 man/70R JOHN -/l Z K540 ATTOR/Vf) Patented Dec. 13, 1949 SAFETY GUARD FOR BUFFJNG- :MAGH N-ES' John M. Kelly, Adria-n, Mich, 'ass'ig nor-t'o Gerity- Michigan Corporation, Adrian, Mien, a. com

poration of Michigan Application March .22, 19412,,Ssrial3151a. tsetse 1 This invention relates :to a bufling wheel safety guard and asserxibledmechanism for use prefer- .jabl y'with pneumatic systems in which the dust suitably removed and I provide means to stop and collect any article '(if dropped out of the buffers hands) thereby avoiding possible injury to the workmemthe guard also acting to prevent dustfumes, etcetera, from being directed toward the workmen.

Incertain types of buffingwheels, the actual huffing material on the revolving wheel wears relatively :rapidlyand my invention provides means to readily and accuratelyadj'u-st and keep in setposition the bufling guard of my invention in, proper position in the mechanism.

Further objects and advantages are within the scope of this invention such as relate to the arrangement, operation and function of the related elements of the structure, to various details of construction andto combinations of parts, elements per se, and to economies of manufacture and numerous other features as will "be apparent from a consideration of the specification and drawing of a form of the invention, which may be preferred, inwhich:

Figure I is a top plan view of one embodiment of guard screen;-

Figu-re II is a top plan view of the same installed in the channels for supporting the same in the hood of the buffer mechanism;

Figure III is a rear side elevational view of the mechanism installed with the buffing wheel and hood parts broken awayto illustrate the construction;

Figure IV is a side elevational view of the asly with partsbroken away to. show the op ating mechanism;

Figure V is a front elevational view of the removable drawer at. the bottom-of the hood; and

Figure. lZI. an elevational view partlysection of thegearing mechanismior adjusting the guard screen. .01, plate,

As shown in Figure 'IV', my present invention includes an adjustable guard ID for use. assembled in the dust hood .l2 which surrounds the ibuffing wheel 14, driven in. the direction, of the arrow l5. Connected with hood [2 is a pneumatic duct I6, through which dust from the buffing operation is drawn by the blower system (not shown).

As stated above, the present invention is intended to be applied to machines for buffing plated material such as chrome plated articles of all kinds including those of various shapes and sizes, some of which are relatively small and if 5 Claims. (Cl; Bi -238 the operator drops one of the pieces, the guard ill will} prevent the same from being carried around by wheel .HI and thrown out through thetop of, the hood I? which might fly right into the operators face who is standing facing the wheel I l. -Moreover, as" the material on the huffing wheel is continually wearing, it is necessary to adjust the guard- W toward the center of the wheel as thediameter thereof decreases due to such wear, which in some instances may be relatively rapid.

In'Fig'ureI, I show the guard l0 detached from the'mechani-sm, and in this instance the same comprises a frame I58 to which is attached the or channel inons and '23 located at an angle as tin-dieated in Figure "IV. The guard l0 slides in these angle plates. any position of adjust- ;ment asdctermined by theradjusting mechanism. Asdndicated in II, I provide a pair of

transverse braces

24 and 25 connected with the angle and 23 to give rigidity to the .asis'emhl-y of thetmechanism in the hood l2.

. Asmdieated in Figure. I, the guard It is provided with a series .of longitudinally arranged

openings

28 and 29; on the. opposite sides of the guard tooperateas gear-racks with which a pair (of gears Mend: shown in Figure VI, are fixed rotatable-shaft 33, and are adapted; to co 7 operate and operate said racks :218 and 29 on the guard ill. .Asindicated in Figure VI, the ,Shfilftffi

iis.rotatablysupportedin bearings

34 and 35, supportedontthe underside of angle pieces :23 land; 22'. shaft, 33 extending. outside of the bnmnghoodlir and having connected on its outer extremitythe worm wheel 3:6. It will thus be seen that by providin g =mea-ns to rotate the shaft zts'ithrough the worm wheel the gears :30 and :31 acting through the

racks

29 and 28 will slide the guard eta-in rthe'zchannels' tz and -23:1to. any

position desired.

So that the operator may readily adjust the guard, I provide on the outside of the hood a worm 38 carried by worm shaft 39 which is suitably mounted in brackets 40 and ll to the outside of the hood 12 as indicated in Figures III and IV. The upper end of the worm shaft 39 is provided with an operating handle 43 extending may be made so that the parts will automatically stay in any particular position of adjustment due to the friction, and yet on the other-hand,-

the adjustment of the position of the guard plate or screen may be made to a fine degree as may be required.

As indicated in Figures 1V and V, the bottom of the hood I2 is provided with the sliding drawer 45 having a suitable handle 46 so that the same may be pulled outwardly to retrieve any small articles that may have been dropped by the operator, carried around by the bufiing wheel 14 to hit the guard Ill and drop down the hood l2 and into the sliding drawer 45. It will be understood that the mesh of the screen on g the guard I0 is made relatively small but of a very strong Weave so as to effectively divert any articles down the hood I2 into the drawer 45 and as stated a solid plate 20 may be used.

I claim:

1. A buffing wheel guard in combination with a hood and pneumatic dust removing system, comprising a guard supporting means secured within the hood rearwardly of the buffing wheel,

a guard located within said hood and supported by said means; a transverse rotatable drive shaft located within said hood and extending outside thereof; gearing between said shaft and said guard adapted to operate and move said guard to various positions of adjustment; a gear fixed to said transverse shaft and located outside said hood; a cooperating gearing and shaft mounted on the outside of the hood for turning said transverse shaft, said shaft extending to the top of the hood; and a means connected with the upper end of said shaft whereby the operator may operate the mechanism to adjust said guard in said hood.

2. A buffing wheel guard in combination with a hood and pneumatic dust removing system,

comprising a guard supporting means secured within the hood below the center of and rearwardly of the buffing wheel axis, a guard located within said hood and supported by said means; a transverse rotatable drive shaft located within said hood and extending outside thereof; gearing between said shaft and said guard adapted to operate and move said guard to various positions of adjustment; a friction gear means fixed to said transverse shaft and located outside the hood; a cooperating gearing and shaft mounted on the outside of the hood for turning said transverse shaft, said mechanism operating to maintain said guard in set position of adjustment.

3. A buffing wheel guard in combination with a hood and pneumatic dust removing system, comprising a guard supporting means secured within the hood below the center of and rearwardly of the buffing wheel axis, a guard located within said hood and supported by said means; a transverse rotatable drive shaft located within said hood and extending outside thereof; gearing between said shaft and said guard adapted to operate and move said guard to various positions of adjustment; a gear fixed to said transverse shaft and located outside the hood; a cooperating gearing and shaft mounted on the outside I of the hood for turning said transverse shaft;

said hood extending to the floor; and a removable drawer at the bottom of said hood for receiving articles directed downwardly of said hood by said guard.

, 4. A bufing wheel guard in combination with a hood and pneumatic dust removing system, comprising a pair of rails adapted to be secured within the hood below the center of and rearwardly of the bufiing wheel axis, a guard having parallel gear racks on opposite sides, said sides located within said rails; a transverse shaft; gears carried by said shaft adapted to operate said racks and move said guard; a worm wheel fixed to said transverse shaft located outside the hood; a worm and worm shaft mounted on the outside of the hood for turning said worm wheel, said worm shaft extending to the top of the hood; and a crank handle connected with the upper end of said shaft whereby the operator may adjust said guard within said hood. 5. A buffing wheel guard in combination wit a hood and pneumatic dust removing system,

comprising a pair of rails adapted to be secured within the hood below the center of and rearwardly of the bufiing wheel axis, a guard having parallel side members; a series of holes in said :members adapted to constitute gear racks; on opposite sides of said guard, said side members REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 333,478 Parks Dec. 29, 1885 1,694,340 Weinland Dec. 4, 1928 2,225,225 McElevey Dec. 17, 1940 FOREIGN PATENTS Number Country Date 4,7 39 Great Britain 1910 19,892

Sweden Dec. 9, 1904