US136025A - Improvement in metal-coated ware - Google Patents

Description

UNITED STATES PATENT, OFFIcn.

GEORGE BOOTH, OF PHILADELPHIA, PENN SYLVANIA.

IMPRQVEMENT IN METAL-COATED WARE.

Specification forming part of Letters Patent No. 136,025, dated February 18, 1873.

To all whom it may concern: i Be it known that I, GEORGE Boo'rH, of the city and county of Philadelphia and State of Pennsylvania, have made a new and useful Improvement in the Manufacture of Articles of Metal-Coated or Galvanized Ware; and I hereby declare the following to be a full and exact description of the same.

This kind of warewhen made by stamping is not durable, for the reason that in the operation of stamping the metal is drawn very much at certain points, and the metal coating thereby to some extent ruptured. While the article is new this does not show, but when the article is used corrosion sets in at the ruptured points, and very soon the vessel shows splotches of rust, so as at once to spoil the appearance of the articles, and after a brief use entirely destroys it. This is especially the case in articles made by deep stamping, such as sheet-metal dish-pans. This article as now made-is almost always defective for this reason. The object of my invention is to cure these defects and to produce a new and improved article-namely, a sheet-metal dish-pan formed by the process of stamping, and coated after stamping with metallic zinc, by the op eration of galvanizing.

The following description will enable others to make and use my invention.

Itake a sheet of strong tin-plate -that is, tinned sheet-irom-and, by means of proper dies and presses, stamp it up so as to form a dish-pan, such as is commonly used for washing dishes. This forms the body of the pan,

which is then wired, and the handles attached either by rivets or by solder. the handles by rivets.

I prefer to fasten This operation would complete the pan as it has been usually made prior to my invention, but would leave it in l a condition to be readily corroded at the places where the metal was most strained, and also around the top where the wire is inserted, and at the points where thehandles are attached. The contact of dissimilar metals with the presence of moisture formsaminiature electric bat, tery, and soon corrodes the iron, which is the more oxidizable metal.

To complete the pans thus formed it is next galvanized-that is, coated by metallic zinc. This gives a beautiful crystalline surface .to the entire vessel, and eifectually prevents corrosion from setting in.

Instead of tinned sheet-iron, ordinary sheetiron may be used, or sheet-iron coated with other metals may be employed for forming the body and handles of the dish-pan.

I do not claim the process of forming articles of sheet metal by stamping, and then coating, method of galvanizing sheet metals; but limit myself to the combination of processes and operations so as to produce thereby the new and improved article of manufacture which constitutes my invention.

What I claim, and desire to secure by Letters Patent, isi The article of coated ware herein described, formed by stamping, andafterward zincing, substantially as herein set forth.

GEO. BOOTH.

Witnesses:

D. W. HAZELTON, FRANCIS H001).

as that is known and used, nor the