US334786A

US334786A - John henby la bait

Info

Publication number: US334786A
Authority: US
Publication date: 1886-01-26
Anticipated expiration: 1903-01-26

Description

(No Model.)

J. H. LA BAU. PROCESS OPATTAOHING COMPOSITION LETTERS TO COMPOSITION SURFACES. N0. 334;,786. Patented Jan. 26, 1886.

1| I fi wn xx I W W/ //i IA/8858.- 4 f4 jgE/Wgfi a... aw

A fro /VH NtTEE STATES PATENT UEErcE.

JOHN HENRY LA BAU, OF NEW YORK, N. Y., AssIcNoH TO THE NEW HAVEN CLOCK ooMPANY, OF sAME PLACE.

PROCESS OF ATTACHING COMPOSITION LETTERS TO COMPOSITION SURFACES.

E PECIFICATION forming part of Letters Patent No. 334,786, dated January 26, 1886.

Application filed December 7, 1885. Serial No. 185,028. (No model.)

To aZZ whom it may concern:

Be it known that I, J oHN HENRY LA BAU,

' of the city of New York, county and State of New York, have invented a certain new and useful Improved Process of Attaching Composition Letters to Composition Surfaces, of which the following is a clear, full, and exact description.

Figure 1 is a central section of a telegraph call-box constructed according to my invention. Fig. 2 is a face View of the same. Fig. 3 is a detail sectional View of the appliance for shaping the same. Fig. 4.- is an enlarged sectional view of part of said box.

This invention relates to a new process of forming letters on composition surfaces, and is useful for the construction of telegraph call-boxes, marking-chips, &c. The composition itself is not part of the present invention, as it has already been utilized for sundry purposes in the arts. It is a composition which is rcndered plastic by heat, such as sealing-wax.

My invention consists, principally, in attaching raised letters to composition surfaces by a process which consists, first, in filling cavities in a proper mold with theplastic substancefor the letters, then melting said substance and allowing it to become hard, then filling the mold further with the plastic substance for the holding-plate, then melting said substance and remelting said letters, and in then letting both the substance for the plate and that for the letters harden.

In the drawings, the letter A represents the back of a telegraph call-box. B is the cylindrical shell of the same, and O is its face or front. On the outer side of the faceplate 0 appear the letters or words that are shown at a in Fig. 2. These letters or words it is the intention of my invention to form on the face of the box out of the substance thereof, but throughout of different color, so that the lettering of the box by hand may be avoided, and so, also, that if a portion of a letter shouldchip off, that part of the letter beneath will still have the different tint. In order to produce this effect I prepare a plate, D, (see Fig. 3,) in the face of which are engraved to the proper depth the letters a, that are to be produced 011 the face-plate 0. Into the cavities thus produced in the plate D, I insert the composition, preferably in a finely powdered state, so that the cavities for these letters shall just be filled with this composition. The composition that is inserted into these cavities has the color of which it is desired to produce the letters on the box. Heat is now applied to the plate D, so as to melt the particles of the composition, thereby filling the cavities with the solid letters. These are then allowed to cool and become hard. After this the plate D is made use of as the bottom of a mold, E. Intothis mold is inserted the composition for the plate 0, which composition is of the same character and kind as that used for the letters, but of a totally different color. Thus if the body of the plate 0 is black the letters a may be red or yellow.

When the composition 0 is in the mold D E, heat is again applied, thereby remelting the contents of the cavities of the plate D, and also melting the substance of the contents of the mold, the effect being that when afterward the mold is chilled the letters 64, throughout of the same color, will adhere to the face of the differently-colored plate 0.

By first letting the letters harden and then filling in the plastic composition for the body of the plate 0, I prevent the two mixtures from blending and forming uncertain outlines for the letters.

The particular advantage of this invention is, that the substance having the letters a thereon need not have the lettering painted .or stenciled on, thus saving considerable hand-labor, and also that the letters are far less destructible than those which can be painted or stenciled onto such a surface.

The signal-box herein described has been made the subject of another application for a patent, which was filed February 6, 1885.

I claim in this application as my invention-- 7 The process described of attaching letters to surfaces, which process consists in first filling cavities in a proper mold with the plastic substance for the letters, then melting said substance and allowing it to become 5 hard, then filling the mold further with the plastic substance for'the holding-plate, then melting said substance and remelting said letters, and in then letting both the substance for the plate and that for the letters harden,

as specified.

' JOHN HENRY LA BAU.

Witnesses:

GUSTAV SOHNEPPE, JOHN M. SPEER.