US2071086A - Method of producing an ornamental design in stone - Google Patents

Description

R. B. PERRY Feb. 16, 1937.

METHOD OF PRODUCING AN ORNAMENTAL DESIGN IN STONE Filed July 15, 1934 2 Sheets-Sheet 1 EberzEYQ-rxy f a? w aim.

R. B. PERRY 2,071,086

METHOD OF PRODUCING AN ORNAMENTAL DESIGN IN STONE Feb. 16, 1937.

Filed July 15, 1934 2 Sheets-Sheet 2 Per/ Patented Feb. 16, 1937 UNITED STATES PATENT OFFICE METHOD OF PRODUCING AN ORNAMENTAL DESIGN IN STONE of Vermont Application July 13, 1934, Serial No. 735,007

6 Claims.

This invention relates to the production of ornamental designs in stone and particularly to the production of designs in granite memorials by sand blast operations.

It is the general object of my invention to provide an improved method of producing such ornamental designs by successive sand blast operations, particularly when the design includes contoured elements.

A further object is to provide an improved method of using successive stencils in the production of a contoured ornamental design in stone by sand blast operations.

My invention further relates to an ordered procedure which will be hereinafter described and more particularly pointed out in the appended claims.

Successive features of the invention are shown in the drawings, in which Fig. 1 is a partial plan view of a stencil used in practicing my improved method;

Fig. 2 is a similar view of a second stencil;

Fig. 3 is a sectional elevation of a stencil, taken along the line 33 in Fig. 1;

Fig. 4 is a detail sectional view showing the first stencil applied to a block of stone, taken along the line 4-4 in Fig. 1;

Figs. 5, 6 and 7 are views similar to Fig. 4 but showing successive steps in my improved method;

Fig. 8 is a sectional elevation of the ornamented stone after the second stencil has been removed;

Figs. 9, 10 and 11 are sectional elevations similar to Figs. 4 to 7 and relating to the production of a screen background;

Fig. 12 is a plan view of a finished carving;

Fig. 13 is a partial plan view of an additional stencil, and

Fig. 14 is a partial front elevation of a monument and illustrates the use of the stencil shown in Fig. 13.

Referring to the drawings, my improved process of producing an ornamental design by the use of a sand blast involves the use of successive stencils, such as are designated B and C in Figs. 1 and 2. Each stencil is preferably formed. of separate layers, as indicated in Figs. 1 and 3, the preferred form consisting of a middle sheet 20 of zinc or other suitable metal, and the upper and lower layers 2| and 22 being of sheet rubber or some similar composition.

The middle layer 20 gives stiffness to the stencil C or B and holds all parts of the design in the desired relation, while the upper rubber or composition layer 2| resists the action of the sand blast in the well-known manner, and the lower rubber or composition layer 22 fits snugly against the surface of the stone and may be secured thereto by a suitable cement or other 3 adhesive if desired.

The stencil B is provided with openings 25 which correspond to the outlines of the leaves, flowers or other elements of the design which are to be contoured in the finished product.

The stencil C is provided with background openings 27 and with outline grooves 28, which openings and grooves surround the stencil portions 30 which correspond to the design to be produced. These parts may be connected by narrow tie pieces 31 wherever necessary.

In the production of a sand blast design by my improved method, I first prepare the stencils as above described and then place the stencil B on the surface of the stone or granite block in which the design is to be produced. The stencil may be held in position by any desired means but preferably by the use of a non-staining cement or adhesive. This step in the process is illustrated in Fig. 4.

I then apply a controlled or pencil sand blast S through each opening 25 in the stencil B and produce the desired contoured design element as narrow slots as indicated at 33 (Figs. 2 and '7).

I then apply a general sand blast against the surface of the stencil C, which sand blast will operate through the openings 21, 28 and 33 to produce the background portions 31, the outline grooves 38 and the veins 39, all as shown in Fig.

'7. It should be noted that no separate operation is necessary to sink the veins.

The stencil C is then removed, leaving the completed design as shown in section in Fig. 8.

From the above description it will be seen that my improved method may be quickly and easily carried out, that it involves no long waiting periods for the drying of glue or composition applied to a stone, and that the stencils may be previously prepared and held in readiness for use.

In the previous procedure, as shown for instance in the patent to Chase, No. 1,803,891, it was necessary to apply two or more separate coatings of glue or composition and to let each coating slowly dry before work could proceed. It was also necessary to outline and cut the design in each coating of glue after the application thereof to the stone. In my improved process, however, the same stencils may be used repeatedly, and twenty or more copies of a design may be produced by use of the same stencils.

If it is desired to produce a background having a non-continuous surface, such as the screen 7 background described in the Sanborn and Haslam Patent No. 1,500,272, issued July 8, 1924, I place a Wire or other screen over the stencil C as shown in Fig. 9 after the sand blast operation indicated in Fig. '7, and I then apply the sand blast a second time as indicated in Fig. 10, thus producing grooves or depressions 42 in the background and attaining the result indicated generally at 44 in Fig. 12. It will be understood that the design of the background may be varied by changing the type of screen 40.

It frequently happens that a design is to be applied to a monumental stone on which a polished surface as (Fig. 14) has been already produced. It is found that sand blast designs are much more pleasing and effective when produced in a plain surface rather than in a polished surface. Accordingly, I sometimes provide an additional stencil A (Fig. 13) having an opening 52 corresponding to the peripheral outline of the design to be produced.

When sand blasting a design in a polished surface, I first apply the stencil A and direct a light sand blast through the opening for a period of time just suflicient to remove the polish from the surface. I then proceed as previously described, using the stencils B and C, and the wire screen 40 if so desired.

By the method above described I am able to produce contoured designs in granite or other stone at a very substantial saving of both time and labor. The advantages of my improved process are particularly noticeable in the case of rush orders, as a contoured design may be entirely completed in a few hours by using my new method, whereas under the previously known methods a period of several days was required, which period was frequently extended by adverse weather conditions.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:-

1. The method of producing an ornamental design in stone which comprises applying a first separate and previously prepared stencil having openings corresponding to the parts of the design to be contoured to the surface to be ornamented, directing a controlled blast of abrasive material through said openings to produce contoured surfaces below said openings, removing said first stencil, applying a second separate and previously prepared stencil with openings therein surrounding the contoured surfaces with its edges registering with the edges of said surfaces previously produced, and blasting the stone through the openings in said second stencil to produce a background for said contoured portions, the blast being so directed that either the background or the contoured surface has sloping walls.

2 The method of producing an ornamental design in stone which comprises applying a first separate and previously prepared stencil having openings corresponding to the parts of the design to be contoured to the surface to be ornamented, directing a controlled blast of abrasive material through said openings to produce contoured surfaces below said openings, removing said first stencil, applying a second separate and previously prepared stencil having differently placed openings and having unremoved po-rtions corresponding to the openings in said first stencil, said second stencil when applied having said unremoved portions covering and protecthing said contoured surfaces and having the openings in said second stencil out of alignment with said contoured surfaces, and blasting the stone through the openings in said second stenoil to produce a background for said contoured portions, the blast being so directed that either the background or the contoured surface has sloping walls.

3. The method of producing an ornamental design in stone as set forth in claim 2, in which narrow slots are provided in the unremoved portions of the second stencil and in which the sec- 0nd blast of abrasive material is directed through said slots to form grooves in the contoured surfaces previously produced, said grooves being formed simultaneously with the production of the background.

4. The method of producing an ornamental design in stone which comprises applying a first separate and previously prepared stencil having openings corresponding to the parts of the' design to be contoured to the surface to be ornamented, directing a controlled blast of abra sive material through said openings to produce contoured surfaces below said openings, removing said first stencil, applying a second separate V and previously prepared stencil .having differently placed openings and having unremoved portions corresponding to the openings in said first stencil, said second stencil when applied having said unremoved portions covering and.

protecting said contoured surfaces and having the openings in said second stencil out of alignment with said contoured surfaces, blasting the Stone through the openings in said second stencil to produce a background for said contoured portions, and in thereafter placing a screen over said second stencil and further applying the blast to provide said background with a non-continuous surface, the blast being so directed that either the background or the contouredsurface has sloping walls.

5. The method of producing an ornamental design on a stone having a polished surface which comprises placing a first separate and previously prepared stencil having an opening corresponding to the peripheral outline of the proposed design on said polished surface, lightly cutting said polished surface through said opening with abrasive material to remove the polish from the corresponding area of the stone, applying a second separate and previously prepared stencil having openings corresponding to the parts of the design to be contoured to said area, directing a controlled blast of abrasive ma-- terial through the openings in said second stencil to produce contoured surfaces below said openings, removing said second stencil, applying a third separate and previously prepared stencil having differently spaced openings and having unremoved portions corresponding to the openings in said second. stencil, said second stencil when applied having said unremoved portions covering and protecting said contoured surfaces and having the openings in said third stencil out of alignment with said contoured surfaces, and blasting the stone through the openings in said third stencil to produce a background for said contoured portions.

ROBERT B. PERRY.

Images