The Cement Age Volume 2, No. 5; A Magazine Devoted to the Uses of Cement by Books Group

The Cement Age Volume 2, No. 5; A Magazine Devoted to the Uses of Cement
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Author: Books Group
Page Count: 30 pages
Published Date: 06 Mar 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
ISBN: 9781130742114
File Name: The.Cement.Age.Volume.2,.No..5;.A.Magazine.Devoted.to.the.Uses.of.Cement.pdf
Download Link: The Cement Age Volume 2, No. 5; A Magazine Devoted to the Uses of Cement
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 Excerpt: ...caps and sills to windows or doors, ornamental water tables and cornices, etc. Patents Nos. 583,515, 699,587, 699,588 and 624,563, granted to C. W. Stevens are held by the Stevens Cast Stone Co., of Chicago, on this process. This company, in applying for a patent in Germany, was told that it was not believed possible to successfully cast concrete in sand, so men were sent to Germany to demonstrate the process. The patent was granted. These patents cover broadly the process of casting any shape, more particularly hollow shapes, of concrete in sand molds or molds partly of sand and partly of other materials. These molds are, in many cases, substantially the same as for casting molten metal, and the same quality of molding sand is used. It is questioned by many whether these patents will hold, and there has been much concrete block work done by this method where patent rights from the Stevens Cast Stone Co. were not secured. It is certain that the process of casting any molten metal in sand molds would not be, at this late date, a patentable process. The Aberthaw Construction Co., of Boston, Mass., cast all of the concrete steps for the Harvard Stadium in sand molds, by use of patent rights granted by J. C. McClennahan (Patent No. 711.436). This process, in practice, is substantially the same as that employed by the Stevens Cast Stone Co., the McClennahan patent using in the sand or other mold a "hardening chemical solution." In practice, the writer has been informed, a small proportion of sulphuric acid is added to the water used in compacting the sand molds. In Cuba this process seems to be open to competition to anyone who desires to use it, without regard to patents. To the writer's mind, a local manufacturer should use some process that will acc...

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