US 1356707 A
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ARTICLE OF MANUFACTURE APPLICATION FILED APR. 11, 1919.
Patented Oct. 26, 1920.
UNITED HERBERT L. GLAZE, 0F LOS ANGELES, CALIFORNIA, ASSIGNOR, BY MESNE ASSIGN- PORATION OF CALIFORNIA.
, 013 LOS ANGELES, CALIFORNIA, A COR- Application filed April 17,
To all whom it may concern:
Be it known that I, HERBERT L. GLAZE, a citizen of the United States, residinglin the city of Los Angeles, county of Los geles, and State of California, have invented a certain new and useful Article of Manufacture, of which the following is a specification.
My invention relates to plaster board and the like, and has as its principal object to provide a small piece of plaster board, or other. like article, made of brittle material and easily broken, which shall be free of corners or angles so easily broken when handled or when the edge thereof is pinched with the fingers in a test of its strength. I have discovered that a small, round piece of composition board is most difficult to break on the edge. Therefore the'real essence of my invention is the form of the piece used for sample purposes, intended to be much handled and thrown around, and the form of the sample is, therefore, the principle of the invention. Of course I do not claim that the mere making of an article round is invention separate and apart from the kind of article. This invention relates to plaster board and the like, made of brittle material, sometimes covered with sheet material, such as paper, cloth and the like. If in square form or in a form having corners or angles, I have found from experience that these corners and angles are easily broken and little by little, always in the form of corners or Specification of Letters Patent.
Patented Oct. 26, 1920.
1919. Serial no. 291,982. points, the sample is wornaway and its appearance made rough and undesirable.
I have dlscovered that by making a samtinuous rounded edges, and eliminating all corners or angles to be broken, the sample ple of plaster board or the like with concan be used a long time and its edges will remain uniformly smooth and" even, and in fact, 1t 1s difficult to break out a piece of said plaster board.
I have illustrated such a piece of plaster board on the-accompanying sheet of draw- ,ings, in which Figure 1 is a perspective view of a sample of plaster board, showing the top cover sheet partially turned back; and,
Fig. 2 is a straight fiat view thereof.
In the drawings, the body of the plaster board is designated 1, and the covering of sheet material is designated 2.
What I claim to be new therefore, and desire to protect by Letters latent is,-
In plaster board and like material of brittle composition, a sample piece made with a continuous curved edge for the pur pose of preventing breakage of the edge thereof in handling and testing in the hands, substantially as described.
Signed at Los Angeles, Los Angeles I county, California, this 28 day 1919.
HERBERT L. GLAZE. In presence of W. R. LITZENBERG,
H. M. BRUNDAGE.