US 392977 A
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Description (OCR text may contain errors)
(Nomodel') A. LANGERFELD.
MEANS FOR BMBOSSING SHEET METAL. No. 892,977. Patented Nov. 13, 1888.
0 T Fig.2 1
UNITED STATES PATENT ARTHUR LANGERFELD, or NEW YORK, N. Y.
MEANS FOR EMBOSSING SHEET METAL.
SPECIFICATION forming part of Letters Patent No. 392,977, dated November 13, 1888.
To all whom, it may concern:
, Be it known that I, ARTHUR LANGERFELD, a citizen of the United States, residing at the city, county, and State of New York, have invented certain new and useful Improvements in Embossing Sheet-Metal Articles; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.
My invention relates to an improvement in the means for embossing spun bodies and other forms of sheet metal or other similar materials in dies bythe pressure of a fluid, and is useful for embossing vases, lamp-bodies, parts of chandeliers, silver and white-metal hollow ware; and the objects of my invention are to provide an expeditious means for placing the sheet metal in the die, making a tight connection with the fluid, and readily disconnecting and taking out the sheet metal when embossed. I attain these objects by means of the device illustrated in the accompanying drawings, in Which- Figure 1 shows an external top view of an .inelosure, E G E G, containing the sections D of a sectional die, (shown in hatched lines,) and asheet-metal body, B, already embossed, (shown in dotted lines,) and the tube T,with flange or plate F and flexible rim R, (shown in'broken lines.) The dotted circle 0 is an opening in the body B. G G are bolts holding the inclosure E.
Fig.2 shows a vertical section through the center,the same letters denoting the same parts as in Fig. 1.
To carry out my invention, I close all openings or holes in the sheet metal B except the top opening, 0, and insert into this opening 0 the flexible rim R. The flange or plate F is made a little smaller than the opening 0, so that it will pass through 0 and allow the flexible rim R to bend back and pass in also. The
flexible rim R is firmly attached to the flange or plate F, and is made of rubber, leather, or other suitable flexible material, and is large other sufficiently hard material in sections,
where necessary to lift oil", and is held together by a suitable inclosure, E G E G. The tube T, with flange or plate F, is kept in place either by being braced or held from without, or by being inclosed in the inclosure E G E G, as shown. \Vhen so inserted and held, water or any other suitable fluid is forced into the body B through the tube T. The pressure against the flexible rim R will press it closely to the edge 0 of the body B and form a tightjoint or seal between the tube T and body B. The pressure of the fluid is raised high enough to cause the sheet metal B to yield and closely fill and conform to all the cavities on the inside of the sections D of the die. The necessary pressure and time must be ascertained by experiment for each kind and thickness of sheet metal. The pressure is obtained by connect ing the tube T with a force-pump or other source giving a continuous very high pressure. When the pressure is taken off and the inclosure E G E G and sections D are removed, the tube T, together with the flange or plate F and rim R, can be as easily withdrawn as they were inserted.
, For some kinds of sheet metal which yield easier when hot it is of great advantage to use a hot fluid.
Having fully described my invention, what I desire to claim and secure by Letters Patent The combination of the die D, tube T, flange or plate F, and flexible rim R, substantially as shown, for the purpose specified.
T. B. WAKEMAN, A. B. CAMPBELL.