US488655A - John eborall hartley and herbert edward hartley - Google Patents

Description

(Nuo Model.) Y

J. E.,& H. E. HARTLEY. ATTAGHABLE LETTERFOR SIGNS;

THE Nonnps PETERS oo.. Pamufno, WASHINGTON. o. a

UNITED STATES PATENT OFFICE.

JOHN EBORALL I-IARTLEYKAND HERBERT EDVARD HARTLEY, OF BIRMINGHAM, ENGLAND.

ATTACHABLE LETTER FOR SIGNS.

SPECIFICATION forming partk of Letters Patent No. 488,655, dated December 27, 1892.

Application tiled .Tune '7, 1892. Serial No. 435,906. (No model.)

To all whom t may concern:

Be it known that we, JOHN EBORALL HART- LEY and HERBERT EDWARD HARTLEY, subjects of the Queen of Great Britain, both residing at 13 Saint Pauls Square, Birmingham,

England, have invented certain new and useful Improvements in Attachable Lettersfor Signs, (for which We have applied for Letters Patent in England,No. 191, dated January 5, Io 1892;) and We do hereby declare that the following is a full, clear, and exact description ot' the invention, which will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to the manufacture of letters, including of course numerals or other similar gures, used for signs, and its object is to combine with a cast body of lead and antimony such letters the following prozo cesses, rst, of an electro-deposition of copper, to be followed by an electro deposition of gold or of silver, Which is then coated with any of the well known coatings of Celluloid,

and further in combining with the last z5 named process, a further coating of seed-lac varnish.

IVe carry our invention into eect in the mannerillustrated in the accompanying drawings in Which:-

Figure 1, is a view in elevation of a letter to which our improved process is applied. Fig. 2, is an enlarged cross sectional plan view on line l, 1, Fig. l.

We provide what are known as chill molds, 3 5 which are preferably made of metal, but may be made of plaster of paris, the object being to obtain a perfectly smooth surface. We then melt an alloy composed of iiveparts by Weight of lead and one part by Weight of an- 4o` timony, from which the letter A is cast.. The diiiiculty experienced in obtaining an alloy for casting these letters has been to get cheap alloy that willr How freely when fused, and aord a smooth surface free of air holes, when cold. The alloy herein stated We iind to answer these purposes satisfactorily. These and especially should the articles so coated"`wwmbe subject to frictional wear. In order to avoid this however, we add a further coating of colorless, or as near colorless as may be, cold drying seed-lac varnish E. This we Iind to effectually prevent such chipping or peeling, and very much increasing the duration of the brilliancy of the letters.

The forms andsectional shapes otthe let-v ters, may of course be Varied and also by letters we include numerals or such similar figures analogous to letters, used for sign board purposes.

Ve are aware of varioos alloy compositions for casting purposes in which antimony and lead have been used. Also we are aware that a film of Celluloid has been already applied to preserve metallic surfaces from atmospheric, gaseous or acidiferous action, also that the process of electro deposition in itself is old, and therefore We do not claim those processes or the composition broadly; but

What we do claim as new and desire to secure byv Letters Patent is In sign letters, numerals &c, the combination with the cast metal body, of the coating of copper, and the coating of precious metal and the films of celluloid and seed-lac varnish, substantially as described.

' JOHN EBORALL HARTLEY.

HERBERT EDWARD IIAR'ILEY. Witnesses:

CHARLES T. POWELL, ERNEST W. JONES.

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