US378413A - Hollow oenameftal metallic bodies - Google Patents

Description

(No Model.)

J. BURKHARD? DIE FOR FORMING HOLLOW ORNAMENTAL METALLIC BODIES.

No. 378,413. Patented Feb.21, 1888.

UNITED STATES PATnnT rrinn, 3

JOHN BURKHARDT, OF NEYV YORK, N. Y., ASSIGNOR OF ONE'HALF TO WILLIAM H. JACKSON 83 00., OF SAME PLACE.

DlES FOR FORMING HOLLOW ORNAMENTAL METALLIC B ODlES.

SPECIFICATION forming part of Letters Patent N 0. 378,413, dated February 21; 1888.

Application filed January 3, 1587. Serial No. 223,209. (No model.)

To all whom, it may concern:

Be it known that I, JOHN BURKHARIDT, a citizen of the United States, residing at New York, in the county and State of New York, have invented new and useful Improvements in Mechanism for Making Parts of Ornamental Metallic Rails, Balusters, Posts, and Similar Articles from Tubing; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this specification, in which-- Figure 1 represents a perspective view of a pair of former-plates used for operating upon a piece of tubing, such as is shown in position at d ready to be reduced to the desired form. Fig. 2 is a similar view of the same with the section of tubing after having been reduced to the undulating shape suitable for ornamental balusters or posts. Fig. 3 represents a perspective view of a portion of netting of fine elastic steel wire, which for the purpose of surface ornamentation will be laid upon the undulating face of plate a, for the purpose of impressing its figure or design upon the baluster or other article formed by being passed between the converging plates at b.

The object of this invention, as will now appear, is to produce the above-named class of articles from metal tubing with varied surface embellishments in an expeditious and simple manner. Balusters and analogous articles may by these means he made of tubing or rolled metal of suitable temper and pliability to sustain the action of the machinery and to receive the embellishing imprint as described. It is apparent that wire-netting or other thin hard elastic material formed to represent any particular figure or design in relief maybe em- 40 ployed in the manner specified for surface embellishment of these products.

The plates at 5, instead of being made with parallel corrugations or ribs, may be made with diverging or spirall y-arranged ribs or grooves, whereby such different configurations would be impressed into the surface of the tubing as it passed between said plates.

The operation of converting tubing to the ornamental shapes mentioned and shown at cl by the mechanism described may be eifected by the use of a metal-planing machine, the bedplate a being secured upon the table or frame of such machine, and the traversing plate b being secured to the tool holder or clutch of the machine by means of the bridge-block c, and as the plates are formed as inclined planes upon their working-faces the space between them is convergent, narrowing from the place of introduction of the section of tubing (1 to the place of discharge of the formed baluster at d. The movement of the former-plate I) over the bed-plate a, the tube 01 being between them, will gradually reduce the tube to the shape corresponding to the form of the working-faces of the plates without causing injury to or fracturing the article formed.

Having fully described my invention, what I claim therein, and desire to secure by Letters Patent, is

The hard metal netting or its equivalent jointly with the corrugated converging formerplates a b, for embellishing the ornamental hollow balusters, posts, or rails, in the manner described.

J OHN BURKHARDT.

Vitnesses:

H. P. K. PEOK, GEORGE MoHUeH, FRED. It. LAWRENCE.

Images