US822096A - Apparatus for grinding, smoothing, and polishing plate-glass. - Google Patents

Description

PATENTBD MAY 29, 1906.

. r E. BAGNALL. APPARATUS FOR GRINDING, SMOOTHING, AND POLISHING PLATE GLASS.

APPLICATION FILED JUNE 24, 1905.

5 SHEETS-SHEET 1.

jmeni'on Mgdfuld llLl lllllllu No. 822,096. PATENTED MAY 29, 1906.

E. BAGNALL. A APPARATUS FOR GRINDING, SMOOTHING, AND POLISHING PLATE GLASS. APPLICATION FILED JUNBZL, 19 o5.

s SHEETSSHEET 2.

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. B. BAGNALL. APPARATUS FOR GRINDING,' SMOOTHING, AND POLISHING PLATE GLASS.

-- APPLICATION FILED JUNE'24, 1905.

5 SHEETS-SHEET 3.

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PATENTED MAY 29, 1906.

E. BAGNALL. APPARATUS FOR GRINDING, SMOOTHING, AND POLISHING PLATE GLASS.

APPLICATION FILED JUNE 24, 1905.

" 5 SHEETS-SHEET 4.

MMMWMWMWMMMA No. 822,096. .PATENTED MAY 29, 1906.

E. BAGNALL. v APPARATUSFOR GRINDING, SMOOTHING, AND POLISHING PLATE GLASS.

APPLICATION FILED JUNE 24', 1905.-

5 SHEETS-SHEET 5- V4 47 aw UNITED EDWARD BAGNA LL. OF

PATENT carrot).

PI'IYISBURG, PENNSYLVANIA, ASSIGNOR TO ZOFFER PLATE GLASS MANUFAGTURING-COMPANY, OF PITTS- BURG, PENNSYLVANIA, A CORPORATION OF WEST VIRGINIA.

APPARATUS FOR GRINDING, SMOOTHING, AND P OLISHING PLATE-GLASS.

Pennsylvania, have invented certain new and useful Improvements in Apparatus for Grinding, Smoothing, and Polishing Plate-Glass, of which the following is a specification, reference being had therein to the accompany- IO ing drawings, forming part of the specifica- 2o vertical sectional view on'the.

2 5 ner of attaching the grinding elements.

tion, in wh1ch,

Figure 1 is a plan view of my improved aparatus for grinding, smoothing, and polis mg plate-glass. Fig. 2 is a central longitudinal vertical section therethrough indicated by the line H II of Fig; 1. Fig. 3 1s a plan View of the 'rotating table, showing a mo tion and arrangement ada ted to support a plurality of plates indepen entl Fi 4 is a line .1 IV of Fig. 3. Fig. 5 is a plan view of one of the eccentricall '-rnounted rotating runners. Fi 6 is an en arged sectional detail view throug a portion of the runner, illustrating the mhan- 1 7 is a similar vlew of a portion of the tabla showing the manner of supporting the plate of glass before exhausting the air. Fig. 8 is a similar view, the air having been exhausted and showing the plate resting solidly upon 3 5 removable supply-Qpipe.

the supportmg-abutments. Fig. 9 is a vertical sectional detail view of one of the runners and its connected parts, illustrating a hollow spindle provided withmy improved Fig. 10 is a detail view in elevatlon 'of one of said removable pipes.

y apparatus for invention relates to im rovements in grinding, smoot mg, and pol- 40 ishing plate-glass, and has for its object to provide improved means for su porting the lates of glass both before and after exhaustmg the air from underneath the plate to provide a resulting holding pressure of the atmosphere, also to means for effectively ox supp hausting the air from one or from a plurality of se aratelgsupported plates, means for ing a rasive material to the runners,

toget er withvarious other features of im-' as shall be more fully hereinafter set forth.

Specification of Letters Patent.

Application filed June 24, 1905. Serial No- 266,809.

ified construcatented May 29, 1806.

Referring now to the drawings, 2 represents the rotating table, upon which the glass plate or plates to be polished are supported, the table consisting of a latform of cast-iron or other suitable material mounted upon a turn-table base 3, so arranged as to be rotatably supported upon any suitable mechanism, as a series of concentrically arranged casters or rollers 4, the turn-table and entire platform being rotated in any suitable manner, as by cables 5, passing around suitable grooves in the turn-table periphery.

The upper surface of the table is provided with a series of bearing-abutments 6, of rubber or other suitablecus'hioning material of suilicient strength to uphold the lass plates under the grinding operation, ut suiliciently resilient to give slightly under said pressure and to thereby permit the lates'to become" veniently be made in one or a series of molded sheets entirely covering the area of the table and so constructed that when surrounded by a suitable packing the intervening spaces 7 between the abutments communicate throughout in various directions and constitute a chamber from-which the air may be exhausted by withdrawing it from any one or more points. For the purpose of effecting such withdrawal of the air or creating a partial vacuum I provide a series of pipes 8, extending up'through the bottom portion of the table, as shown in Fig. 2, and connected with a central shell 9, forming an integral rotating ortion of the platform and turn table.

rom the central chamber within said tube 9 the air is exhausted by means of a pi e 10, leading from the base to any suital) e exhausting mechanism, as a piump. By this construction itwill be seen t at communication is established between the pump and all of the vaiious connections leading to the interstitial passages 7 either during rotation or the stationary status of the table.

For the purpose of packing around the entire outer edge of the platform 2 or around segregated areas thereof, as in Fig. 3, and hermetically inclosing all or any desired portion of the cushion-abutments' 6 I provide a pneumatirtulw ll of sullicient stiffness tov uphold the weight of the glass .plate, but of suflicient flexibility to compress thereunder, due tothe pressure of the outer atmosphere, when the air has been exhausted from underneath the plate, the operation being clearly illustrated m Figs. 7 and 8. a

The plates having been placed .upon the platform and the air exhausted from underneath them, they will com ress the resilient pneumatic tubes 11 and wi I also rest downwardly upon the abutments 6, which will thus provide a continuous series of closelybe emplo ed, as valves 12, by which air may be a mitted independently underneath 1 The any of the various plates where several are ground. A particu ar' advantage of such construction 1s that one or more of the platereceiving areas may be cut out from the suction system without interferin with the other areas or the operation of t e vacuumprod'ucing lant.

) polishing and grinding operation is performed by runners 13, circular in form, preferably two in number, and ofvarying diameters, so arranged above the rotating platform 2 that the will operate over different areas thereof, or which purpose one of the runners is larger in diameter than the other and overlaps beyond the center of the platform, asshown att eleftofFig. 2. These runners are of any suitable construction ada ted to provide a solid .ciraular disk-like hea to the under portion of which are secured the grinding and. oli'shing irons 14, which are secured up against the under side of the runners by means of bolts upon an intervenin sheathing 15 of wood, which is also held by cite or otherwise to the under side of the runners. The irons Mare rovided with a series of intervening channe s 16, by which the abrasive material is freeto circulate in various directions outwardly from the center of the runner, for which purpose I have provided an im roved abrasivedelivery mechanism, whic shall be hereinafter described. If desired, however, the abrasive material may be delivered upon the glass plates in any suitable manner.

For the purpose-of securing the best re-- suits the runners are eccentrically mounted upon the lower ends of driving-spindles 17, mounted in suitable bearings 18 18 in an upper carriage structure 19, mounted upon wheels 20, whereby the entire supportingreatly interfere wit seeped framework for the runners, may be run along 6 upon rails 21 21 at each side of the platform and over to or from the working position. The spindles 17 are vertically movable b mea'ns of lever mechanism 22, rovided wit suitable raising and adjusting cvices which will be readily understood without detailed description and are similar to mechanism for the same purpose well known in the art. For the purpose of quickly raising the levers 22 and runners 13 away from contact or of uickly lowering them upon the glass plates t e lovers are pivoted at 23 to the upper ends of plungers 24, mounted in cylinders 25 on the upper ortion of the framework 19 and connected )y pipes 26 to any suitable source of pressure, as by flexible hose. By this construction it wil be seen that a ve quick raising or lowering adjustment of lllle ners mayl be secured. 1

For t e purpose of accurately and delicately adjusting the runners the outer ends of levers 22 are provided with the usual temper-screws 27, passin downwardly through suitable bearings an provided with handwheels 28, mounted upon their threaded ex-' tremitiesm The spindles 17 and therunners are rotated through bevel-gearing 29 30, the latter bevels being in spline engagement with the spindles, bevels 29 bein mounted on shafts 31, driven through gearmg 32 33 by electric or other motors M, mounted on the traveling framework, as clearly shown in Figs. 1 and 2.

By this construction'it will be seen that the runloo

runners may be delicately adjusted to the work, uick raised and owered therefrom when esire and rotated by mechanism mounted entirely upon the carriage.

For the purpose of conveniently delivering the abrasive material to the central portion of the runners the spindles 17', Fig. 9, are made hollow, so as to receive the inner tube 34, provided with an upper funnel 35 and extibm mg downwardly to a point immediately above the lower faces of the ironing-blocks 14, as clearly shown. The construction otherwise is the same as that ust described, anda particular advantage oi the arrange- Ire ment isthat I am thereby enabled to supply abrasive material of diflerent qualities or of different constituent material, as sand and emery, to the glass plates without danger of mixing them. The advantage of this con struction will be readily appreciated, for the reason that in the o eration of grinding rough plates with sand more or less of the sand is necessarily left in the feeding-tube, whereas in the operation of polishing such remaining particles of sand becoming mixed with the eme are liable to scratch the polishing-surface'o the ass and to destroy or its successful polishing.

enacts the abrasive operation of the sand by the removal of the sand-tube and then insert the emery-tube, so that each is separate from the other, and any liability of the harmful effects above noted is completely avoided.

The operation of the apparatus will be readily understood from the foregoing description. It is capable of grinding and polishing plates of various sizes and of safely supporting them throughout their entire under surface during the polishing operation, thus preventing danger of breakage or warphe invention is comparatively inexpensive to maintain in operative condition, greatly cheapens and simplifies the finishing of the plates, and is Well adapted to the objects in view.

Chan es and variations may be made by the skil ed mechanic in the design, proportions, or various details of construction, as I do not desire to be limited to the exactconstruction shown and described; but all such changes are to be considered as within the scope of the following claims.

What I claim is- 1. In apparatus for smoothing plate-glass, the combination of arotating table, an integral covering therefor of impervious resilient material as rubber having a plurality of upwardly-extending supporting projections and g a connected series of intervening air-circulation spaces, an independent surrounding cushioning device, means for exhaustin the air from the cushioning spaces where y a superimposed plate is caused to compress the bearing projections to make an air-tight engagement, means for rotating the supporting-table in one direction, and superimposed runners, with means for rotating them in the opposite direction, substantially as set forth.

2. In apparatusfor smoothing plate-glass, a rotating table provided with a series of resilient supporting-abutments and intervening communicating air-circulation spaces, and a surrounding cushion, with means for exhausting the air from the circulation-spaces, substantially as set forth.

3. In apparatus for smoothing p ate-glass, a rotating table provided with a series of resilient supporting abutments and intervening communicating air-circulation spaces, and a surrounding pneumatic cushion, with means for exhausting the air from the circulationspaces, substantially as set forth. 4. In apparatus for smoothing plate-glass, a rotating table provided with a series of resilient supporting-abutments and intervening air-circulation spaces, with means for exhausting the air therefrom, substantially as set forth.

5. In apparatus for smoothing plate-glass, a rotatingtable provided with a series of intergally-connected resilient supporting-abutments and intervening communicating aircirculation spaces with means for exhausting the air from said spaces, substantially as set forth.

6. In apparatus for smoothing plate-glass, a rotating table provided with a plurality of series of resilient su porting-abutments and intervening air-circu ation spaces with means for exhausting the air from the spaces of each of said series independently, substantially as set forth.

7. In apparatus for smoothing plate-glass, a rotating table provided with a plurality of series of sup orting-abutments extending above the surface of the table and intervening air-circulation spaces, cushioning devices surrounding each of said series of abutments, with means for exhausting the air from the spaces of each of said series independently, substantially as set forth.

8. In apparatus for smoothing plate-glass, a rotating table (provided with a flat base having an upwar y-extending series of rubber sup ortmg-abutments and intervening air-circu ation spaces, a surrounding coinpressible cushion extending slightly above the normal level of the a'butments, with means for exhausting the air from the circulation-spaces, substantially as set forth.

9. In apparatus for smoothing late-glass, the combination of a rotating tab e provided with a fiat base having an upwardlyextending series of resilient su porting-abutments and intervening air-circu ation spaces, a surrounding cushioning device, a central hollow mast, pi es communicating with said mast and wit the air circulation spaces, and means for exhausting the air from the hollow mast, substantially as set forth.

10. In apparatus for smoothing late-glass, the combination of a rotating tab e provided with a fiat base having an upwardly-extending series of resilient s'u porting-abutments and intervening air-circu ation spaces, a surrounding cushioning devlce, a central hollow mast, pipes communicating with said mast and with the air-circulation spaces, provided with valves, and means for exhausting the air from the hollow mast, substantially asset forth.

11. In apparatus forsmoothing late-glass, the combination of a rotating tab eprovided with a flat base having an upwardly-extending series of resilient 'su porting-abutments and intervening air-circu ation spaces, a surrounding cushioning device, a central hollow mast, pipes communicating with said mast and with the air-circulation spaces, means for exhausting the air from the hollow mast,

and a superimposed rotating runner, substantially as set forth.

12. In apparatus for smoothing late-glass, the combination of a rotating tab e provided with a flat base having an upwardly-extendthe combination of a rotating ta I with a series of upwardly-extending IGSlllBHt;

ing shries of resilient su porting-abutments and intervening air-circu ation spaces, a surrounding cushioning device, a central hollow mast, pi es communicating with said mast and wit the air-circulation spaces, means for exhausting the air from the hollow mast, and aplurality of supleri-mposed runners, substantially as set fort 13. In apparatus for smoothin late-glass, the'combination-of a rotating ta e provided with a flat base having an upwardl -extend- .ing series of resilient su porting-a utments and intervening'air-circu ation spaces, a sur-.

supporting-abutments and intervening air- .clrculation spaces, a surroundlng cushloning device, a central hollow mast, ipes commu.

nicating with said mast and wltli the air-cira culation s aces, means for exhausting the air from the ollow mast, and a plurality of superimposed runners, with means for rotating the runners in a direction opposite to the rotation of the table, substantially as set forth;

15. In apparatus for smoothing late-glass,

the combination of a rotating tab e provided with a series of upwardly-extendingresilient supporting-abutmentsand intervening aircirculation spaces, a surrounding cushioning device, a central hollow mast, pipes commuculation s aces, means for exhausting the air from the ollow mast, anda plurality of-superimposed runners of different diameters, with means for rotating the runners ina direction op osite to the rotation of the table,

substantla ly as set forth.

16. In apparatus for smoothing late-glass, the combination of a rotating tab e provided supporting-abutments and intervening -air-, circulation spaces,.a surroundingcushioning device, a central hollow mast, pipes communicating with said mast and wlth the air-circulation spaces, means for exhausting the air from the hollow mast, and a superimposed traveling carriage provided withvertically: adjustable rotating runners, substantially as set forth.

'1 7. In apparatus for smoothing late-glass, the combination of. a rotating tab e provided with a series of upwardly-extending resilient supporting-abutments and intervening aircirculation spaces, a surrounding cushioning mounted on the carriage foractuating the runners, substantially as set forth.

18. In apparatus for smoothing plate-glass the combination of a rotating table provlded with a series of supporting-abutments and intervening air-circulation spaces, a surrounding cushioning device, a central hollow mast, p1 es communicating with saidmast and W1t the air-circulation spaces, means for exhausting the air from the hollow mast,

and a su erim osed travelin oarriage'pro 8o vided Wit vert cally-adjustab e rotating run ners, levers arranged to raise and lower the to elevate the-fulcrums ofsaid levers, and

runners, fluid-actuated mechanism arranged screw mechanism for adjusting the levers on 8 5- their fulcrums, said mechanism being mounted on the carriage, substantially as set forth.

19. The combination with the rotatin ta- ?ble of a glass-smoothing apparatus, of a g asssupporting cushion consisting of a layer. of' ru e r provided with upwardly-extending 1 abutments, substantially as set forth.

20. The combination with the rotatin table of a glass-smoothing apparatus, ofa g asssupportmg cushion consisting of a layer of ru or provided with upwardly-extending :abutments, and intervening communicating gir-rlalirculation openings, substantially as set ort 21. Thecombinationwith the rotatin ta- 1 ble of a glass-smoothingapparatus, of a g assn supportmg cushion consisting of-a layer of. nicating with said mast and wlth the a1r-'ciriru =abutments, and intervening communicating :air-circulation openings, with a surrounding cushioning device extending slightly above er provided with upwardly-extending the normal top level of the.-abutments,.- substantially as set forth.

\ 22. The combination with the rotatin table of a glass-smoothing apparatus, of a g asssu orting cushion consisting of a layer of with aseries of upwardly-extending resilient vru g abutments, and intervening communicating 5 air-circulation openings, v with a surrounding inflated pneumatic tubeextending slightly or provided with upwardly-extending above the normal to level of the-abutments, substantially as set orth.

23; The combination with the rotatin itable ofa glass-smoothing apparatus, of a g ass: supporting cushion consisting of a layer of ru er provided with upwardly -'extending abutments, and intervening communicating air-circulation openings, with a surrounding inflated pneumatic tube extending slightlyabove the normal top level ofthe abutments,

and means for exhausting the airlfrorn the air-circulation openings, substantielly'as set In testimony whereof I affix my signature forth. Y in presence of twe'witnesses.

24. In glass-smoothing apparatus the comv bination with the hollow spindle of 5 rotating EDWARD BAGNALL- 5 runner, of a removable tube for supplying Witnesses:

abrasive material to the under plortion of the CHAS. S. LEPLEY, runner, substantially as set fort C. M. QLARKE.

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