US2001725A - Ornamental panel and the like of rustless steel and vitreous enamel - Google Patents

Description

May 21, 1935. H. H. HARRIS 2,001,725

ORNAMENTAL PANEL AND THE LIKE OF RUSTLESS STEEL AND VITREOUS ENAMEL Filed 001. 21, 1931 INVENTOR HENRY H. HARRIS ATTORNEYS Patented May 21, 19 35 UNi'lEDfS'l-ATES PATENT OFFICE PANEL AND THE LIKE OF RUSTLESS STEEL AND VITREOUS ENAMEL 7 Henry H. Harris, Champaign, n1.

Application October 21,1931, Serial No. 570,270

- 4 Claims.

for plaques containing designs the relief part may be in one plane; for mouldings, in a cylindrical surface, .and the like. 7

The molding pattern forflat surfaces may adv vantageously be of linoleum, which is waterproof and will not shrink or swell and is easilyrouted out in the parts to be recessed.

The surface of casting other than-the relief design is recessed. High temperature vitreous enamel is applied, and the casting is subjected to temperature suillcient to bake theenamel, as for example, a temperature of 1200-2150 F. according to the baking temperature requirements of the particular enamel. The enamel may be a single color throughout the recessed parts or variously colored parts may be provided, if desired.

In case the enamel is applied to only the recessed parts the piece may be finished by bufling or other polishing treatment. If the enamel is applied all over, as by dipping, then the enamel is ground off-the'relief part which is to show the exposed gleaming metal and the metal is then polished. m e The accompanying drawing is a cross-sectional viewof a fiat form of panel embodying my inven tion. Reference character 2 is applied to the panel body. The polished plane surfaces 4, 4 are surfaces of the body metal, and recessed'parts of the design in the body face arecoated with 40 the glass or vitreous enamel material or materials as indicated at 6.

By making plaquescontaining designs and other articles in the manner described, the finishing is confined to the even relief design part, and the '45 recessed'parts need none of the'usual expensive heat treatment such as 8% nickel, 18% chromium steel, the enamel can be chosen so as to bake at approximately the temperature and time required for heat treatment and thus the heat treatment and enamel baking can be carried out in the one 5 operation. With such a steel as just referred to an enamel baking at temperatures ranging from about 1400-2200 F. is well adapted. m,

One good enamel having a melting point of about 2000 F. contains the following constitu- 10 cuts:

' Percent- White lead 45.01 Feldspar 25.74 Zinc oxide 4.95 5 Quartz or flint 13.86 Calcium carbonate 5.94

Iron oxide 1.5 Cobalt oxide 3.0

Modifications can be resorted to coming within 20 my claims. 7

I claim:

1. Ornamental article exposed to the weather consisting of a body of alloy steel containing chromium in sufllciently high proportion to resist corrosion by the weather and adapted for heat treatment at temperatures over about 1200. F., said body having exposed raised portions presenting the alloy body material to the weather 30 at their surfaces, said body also having lower or recessed portions, and enamel of melting point over 1200 F. applied to the lower parts of the metallic body at a temperature adapted for melting theenamel whereby the metallic body is heat 35 7 treated.

2. Article as in claim 1 wherein the coating applied to the recessed parts of the alloy body being heat treated is of enamel melting fit. about 12002150 F. v 40 3. Article as in claim 1, and in which the stain less alloy steel body that is heat treated contains chromium in the general neighborhood of 18% and nickel in the general neighborhood of 8%.

4. Article as in claim 1, and in which the coat- 45 ing applied to the recessed parts is of enamel melting at about 12002150 F. and the stainless alloy steel body that is heat treated contains chromium in the general neighborhood of 18% and nickel in the general neighborhood of 0%. a

HENRY H. HARRIS.

Images