|Publication number||US91090 A|
|Publication date||Jun 8, 1869|
|Publication number||US 91090 A, US 91090A, US-A-91090, US91090 A, US91090A|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (1), Classifications (1)|
|External Links: USPTO, USPTO Assignment, Espacenet|
dlnited fiance WILLIAM COMP-TON,
v0F NEW YORK, N. v.
, Letters Patent No. 91,090, dated J zme 8,1869.
The Schedule referred to in these Letters Patent and making part of the same.
To all whom it may concern:
Be it known that I, WILLIAM COMPTON, of the city and State of New York, have invented and made a new and useful Composition for Crayons; and I do hereby declare the following to be a correct description of the said invention, showing the peculiarity of my said composition.
Chalk crayons, employed in schools and academics, are of a very dusty nature, and soil the clothing, the
person, and the room, besides being detrimental to adapted to a wooden surface, a painted surface, or a.
slate surface, as: the slate surface requires a crayon that is harder than those for wood.
The ingredients I employ are Paris-white, or similar white earthy material, starch, and soap; and to harden the crayon and render it adapted to slates, I employ glue or gum. I
For a soft crayon I make use of the following ingredients:
About six pounds white.
About three and six-eighths ounces starch.
About three ounces soap.
About one-half ounce gum or glue.
For a harder crayon, adapted to slate surfaces, the proportions should be varied by using about two and one-quarter ounces of glue or gum instead of half an The starch and soap are to be dissolved in hot water, sufiicient in quantity for rendering the white material plastic for pressing or moulding into shape.
The white should he sifted so as to separate any lumps, and render the plastic mass uniform in its character.
In soft crayons the glue or gum might be dispensed with.
Crayons formed in this manner are used with great facility, because the white dust is prevented from rubbing off on the fingers, and there is little or no dust flying about in the atmosphere when the board or slate is cleaned off, because the particles adhere sulficiently to cause them to fall or to adhere to the rubber.
I find that it is preferable to form the crayons into a cylindrical shape by rolling them upon a table with a flat board, so as to compress and harden the material,
and give a slight gloss tothe surface, that prevents the chalk rubbing ofl' on the fingers.
' The crayons are to be dried either in the sun or by artificial heat.
What I claim, and desire to secure by Letters Patent, is-- I The composition for crayons formed of the materials, and as herein set forth.
Also, tothe crayon formed by rolling the plastic massbetween two surfaces, to consolidate the same, as set forth.
In witness whereof, I have hereunto set my signature, this 15th day of May, A. D. 1869.
' Gno. VD. WALKER,
GEO. T. PINCKNEY.
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US5352279 *||Feb 2, 1994||Oct 4, 1994||Rapid Mounting & Finishing Co.-Cadaco Division||Washable pavement chalk composition|