US1840226A - Method of producing alpha contoured surface on stone - Google Patents

Description

E. A. CHASE METHOD OF PRODUCING A CONTOURED SURFACE ON STON Filed April 4. 1927 Jan. 5, 1932.

a mf-M Patented Jan. 5, 1.932

UNITED STATES PATENT OFFICE RLRoY A.

CHASE, or NQR'THRTRLD, VERMONT, AssIGNoR To Rocx or AGES coRroRA- TroN, or BURLINGTON, VERMONT, A CORPORATION or VERMONT `lVIE'II-IIOD'OF PRDUCINGA CONTOURED SURFACE 0N STONE Application yfiled April 4, 1927.

This invention relates to a method of producing an ornamental surface on a block of granite or other similar stone, in which the figure or design projects from a sunken background. f

The general object of my invention is'to provide a method by rwhich such a design may be easily and quickly produced, vwhile at the same time a contoured figure results, ,lohaving a surface which contrasts sharply with the background andother adjacent portions of the stone.

With this general object in View an important feature of my invention relates to .-16 certain methods of production which enable me to produce a contoured figure without the use of hand cutting tools. A further feature relates to the use of certain materials in certain operations Vby which a strongly con- Y I2.0 trastedsurface effect is achieved.

Y 'A My invention further relates to certain associationsV of method steps, which will be hereinafter described and more particularly pointed ont in the appended claims.

c S5 preferred form of the invention is shown the drawings in which Fig'. 1 is a plan view of a portion of a granite block and showing the first step of my improved process;

F i'gfs. 2', 3, 4l and 5 are similar views show- Of successive vsteps in the process;

Figs. 1a to 5@L inclusive are detail sectional views taken along the vlines 12-1a to 5---5a respectively in Figs. 1 to 5;

'Fig'. 6 is a detail sectional view, showing al further step in my improved process;

Fig. 7 is a plan view showing the final step and thel finished product; and

v Fig. 7a, isa detail sectional view taken along the line 7a7ai`n Fig-7. c

Referring to the drawings, I will now describe my improved method of producing a contoured and contrasting surface 0n a granite block or other similar stone.

I rst provide a 'block of stone S having a finished or polished vsurface on oneY face thereof. I then apply a layer 10 of sandresisting compound, such as a special glue, to

the vfinished surface of the stone S and I y cut-out or stencil the design' 11 from the layer Serial No. 180,800.

l0, this step of the process being indicated in Figs. l and la.

I then direct a very tine stream or blast of abrasive material 12 (F ig. 2a) through a small nozzle against the exposed design 11 on the stone S, and by such application cut away the stone within the outlined design, giving the same a desired contour as indicated in Figs. 2 and 2B.

. In the preferred development of my invention, I use a crushed steel having tine angular grains as the abrasive material to form the stream or jet 12. This crushed steel cuts more rapidly than the usual sand blast and moreover produces a surface of a sharply contrasting color effect, the surface ap earing much lighter than a surface pro uced by the use of sand. While I preferably use the crushed steel for the reasons above stated, veryuseful results may be attained by the use of sand or carborundum, and my invention is not limited to the use of a articular abrasive except as set forth in specific claims. i After the figure has been out to a desired contour, I re-surface the figure with the sandresisting compound and stencil the outline of the figure and such other portions as are to be cut deeply below the surface of the designa This step of the process is illustrated in Figs. 3 and 3a, showing the outline of the figure and the veins of the leaves cut through y the newly applied compound 13 on the face of the design.

I then apply a blast of sand or carborundum to the design, cutting the outline 14 and veins 15 to a substantial depth, as indicated in Figs. 4 anc fra. The compound is then removed frein the background of the design, as indicated at 16 in Figs. 5 and 53', and the sand blast is applied toV cut the background to a substantial depth, as indicated at 17 in Fig. 61. If a plain 'background is desired, this sand blasting operation will be continued until the Ybackground is at'the full desired depth. If, however, a contrasting background is desired, a perforated metal screen of suitable design is next laid upon the face of the work in the path' of the sand blast and the sand blast is then directed through the screen, producing a diversified background as indicated at 18 inFigs.V 7 and 7a.

The compound is then removed from the face of the design, as indicated at 20 in Fig. 7 The figure then stands out sharply from the background, andthe contoured surface of the figure is particularly pleasing.- When the crushed steel abrasive is used, the surface of the figure is also much lighter than the background, and the contrast is more effective.v

It will be seen that I am able to produce a contoured figure entirely by the use of a blast of abrasive, thus greatly reducing the cost over the previous procedure involving the use of hand'cutting tools. #Also by using'a specially adapted abrasive, I simultaneously provide the contoured ligure with a sharplycontrasting` color eHect. The steel abrasive may, if desired, be in the form of steel shot instead of crushed steel grains, the effect'thereof being substantially the same except for a difference iii-cutting speed.

Having thus described my invention and the advantages thereof, l do Vnot wish tobe limited to thel details herein disclosed otherwise than as set forthl in the claims, but vwhat I claim is i l. `The method of ornamenting stone which consists in coating a finished stone surf face witha layer vof sand-resistingcompound, with a figure of the design exposedtherethrough, shaping the exposed figure by direct application of a stream of abrasive to saidexposed figure to forma desired contour thereon, re-coating the contoured ligure, removing the compound from the background portion of the surface, and sand-blasting the background to a desired depth while said contoured surface is protected by said com- 40 pound. ,Y

2. The method of ornamenting stone which consists in coating a finished stone surface with a layer of sand-resisting pompound, with a figure of the design exposed therethrough, shaping the exposed figure by direct application of a'stream of steel abrasive to said exposed ligure to form a desired contour of contrasting color elfect thereon, 15e-coating the contoured figure, removing the compound from the background portion of Vthe surface, and sand-blasting the background to a desired depth While said contoured surface is protected by said compound.

3. The method of ornamenting ystone which consists in coating a nished stone surface with a layer of sand-resisting compound, removing th'e compound from a ligure of the design, shaping the stencilled figure by applying a stream of abrasive to the exposed surface thereof to form a desired contour thereon, re-coating the contoured figure, stencilling the outlines of the design therein, sand blasting said outlines, removing the compound from the background portion of the surface, and sand-blasting the background to a desired depth.

4:. The method of ornamenting stone which consists in coating a finished stone surface with a layer of sand-resisting compound, removing the compound from a figure of the design, shaping the stencilled figure by applying a stream of steel abrasive to the exposed surfacetliereof -to form a desired con-- tour thereon, Yre-coatirig the contoured iigure, stencilling the outlines lof the design therein, sand' blastingsaid outlines, removing the compound from the background portionvof the surface,and sand blasting the background to a, desired depth. Y

5. The method of ornanienting stone which consists in coating a finished stonesurface with a layerof sand-resistingcompound, removing the "compound from a figure of the design, shaping the stencilled figure by applying a stream jof abrasiveto theexposed surfacethereof to form a desired contour thereon, re-coatingthe contoured ligure, sten- ,cilling the outlines of the design therein, sand blasting said outlines, removing the .compoundv fromV the background portion of the surface, sand blasting the background toa; desired depth, applying a'screen over the surfacegof said design, and sand blasting said background through said vscreen to its full depth.` i l l 6. Themethod of forming'sand blast carvingpresenting a relief effect consisting in applying a coating to the'surface of the stone, applying flowers or other configurations to the stone, cutting the outline of the flowers and removingthe Coating'within the outline, sand blasting a sinkagein the exposed stone,

recoating theV sinkag'e, cutting out and removc ing a narrow portion around the outer edge of the -flowers, sand blasting the sinkage in said narrow outline, removing the remaining coating and sand blasting the background.

7. The method of vsand blast car'vingincluding coatinga stone, removing the vcoating at the pointswhere a sinkage is desired, sand blasting the stone at the place the coating has been removed, said sand blasting being continued until the sinkage has been formed of the proper depth and shape, recoating the sinkage removing' a. narrowY strip of coating adjacent the outer edge ofsaidsinkage, sand blasting the stone exposed by removing. said narrow strip, removing the remaining coating, andthen sand blasting the background vbetween, said sinkage. j

8. The method of sand blast carving including the coating ofv a piece of stoneto be age is tobe produced,'sand blasting the stone at the parts where the coating has been removed until the desired sinkage has been prorcarved,removing the coating where the sinking being done in two sta es, the first being to uncover and sand b ast a depression around the sinkage and the second being to uncover and sand blast the surface outside of .and around said depression.

9. The method of sand blast carving including sand blasting a sinkage to secure a desired configuration, sand blasting a vertical wall around the outer edge of the sinkage, and finally sand blasting all of the background around the sinkage.

10. A sand blast carving formed integral throughout having a pitted background, and a design formed thereon in relief and having the face thereof formed with a sinkage of a contour to disclose the design, said face being pitted, the side walls of said design being substantially perpendicular to the background and said side Walls extending to the background and substantially following the contour of said relief design.

l1. A sand blast carving formed integral throughout having a pitted background, and a pitted design formed thereon in relief and having the face of the design formed with a sinkage of a contour to disclose the design,

. the side walls of said design being substantially perpendicular to the background, the perpendicular face `of said side walls following the contour of said relief design.

In testimony whereof I have hereunto afHXed my signature.

ELROY A. CHASE.

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