US77781A

US77781A - Jules tukel

Info

Publication number: US77781A
Authority: US
Publication date: 1868-05-12
Anticipated expiration: 1885-05-12

Description

@uiten tatesatent ffirr.

JULES TUREL, 0Fv KENDALLVILLE, INDIANA.

Letters Patent INO. 77,781, dated May 1.2, 1868.

MODEv OF LBTTERING MARBLE.

To'A WHOM. 1T MAY concu-RN:

Be it known that I, JULES TUREL, of Kendallville, Noble county, State of Indiana, have invented a certain new and useful Improvementin Lettering Marble; and I do hereby declaro the following to be a full, clear, and exact description thereof', reference being had to the accompanying dran'ing,making part of this specification.

Figure lis a plan of a slab of marble and a plaster pattern, a portion of said pattern being removed to expose the letters in the marble.

Figure 2 1`s a section at a: fr, iig. vIl, representing a subsequent stage ofthe process,as hereinafter described.-

My invention consists in a mode of applying lead'or other metal to letters in marble or other stone, in order to add to their beauty and durability. i In carrying o ut my invention, Iengrave the desired letters in the stone to a moderate depth, but in this operation no great care or precision is required, except in the outlines of the letters. lI next coat the entire engraved surface with plumbago, pulverized soapstone, or other suitable powder.

I then apply along the central line ofthe letters a perpendicular strip of sheet iron or other metal, e, greased.

to prevent adherence, and then pour ou some cnlcined Ipla-ster of Paris in the formofal thin paste, so as'to' compiet-ely till the letters, and rise to some height above the surface of the marble, so as to give suioient strength to the plaster cast A, which is thus formed. This stage ofthe operation is illustrated in iig. 1', where the plasy ter pattern is represented in section.

When the plaster has become set and hard, I carefully`1emove it, cut away' the 'projections from its face, and by following the lines of the impressions of the letters, form corresponding cavities in its surface to the depth of about one-sixteenth of an inch'. -I then drill diverging holes b b to suche depth, (say, one-eighth of an inch,) and in such positions as may be necessary to secure and retain the metal whichis subsequentlypoured i-n to illlthe letters, as hereinafter explained. These holes' are represented in fig. 1, but in practice they will not, of course, be drilled until the plaster cast has been taken. v The plaster is then replaced over the letters without the metal strip c. This stage of the operation is represented in iig. 2;

'The space left by the strip c constitutes a gate or sprue, g, extending 'from entlto end of the line; andcon: necting the matrices formed by the engraved letters and the cavities in the plaster cast. The customary funnelshapc maybe imparted vto the sprue g, `either b v the form of the strip c or by cutting'- away oneangle of the plaster. Before pouring the lead I prefer to`heat the marble, if practicable and convenient.` I then take lead as pure and soft as possible, without angI alloy or chemical preparation, land having melted it, pour it into the letters from end to end, through the spi-ue g. The plaster pattern is Ithen removedalid thrown away. After this, with suitable instruments, I press and rub the projecting portions of thev leadV as closely1 as possible into the letters,'and th'en cut away the superfluous parts down to the surface of the marble, or nearly so, and the entire surface is then rubbed down andpolshed in thesame manner as a piece of plain marble or other stone.

By the contact of the water and stone inpolishing, the surface of the lead acquires a softl black hue, which .increases with exposure to the Weather, and forms a very beautifulcontrast tothe marble, and, as there are no February, A. D. 1868,1

projecting surfaces or salient angles or edges t suffer abrasion from the weather, or from violence` orlany cause, the Work will endure in good condition as long as the stone itself'.

I have-described my invention as applied to marble, but it is manifestly applicable to any description of stone in which lettersmaybe cut.-

Having thus described my invention, nhat I claim as non', and desrc tosecureby Letters Patent, is- The proc ess,substantially as hereindescribeil, -for applying metalliclettering to.` marble or other stone.

To the above specification of my improvement in lettering marble, I have signedmy hand, this 4th day of 'JULES TUREL. Witnesses:

THOMAS L. GRAVES, Ones. G. Alemana