[D0330AAK1], Letter from Ideal Cash Register Co to Thomas Alva Edison, August 7th, 1903
https://edisondigital.rutgers.edu/document/D0330AAK1
Transcription
Letterhead of Ideal Cash Register Co Bound Brook, N. J. August 7, 1903. <TAE marginalia: Mallory Why not try this at Cement Lab & Galley Co> Mr. Thos. A. Edison Laboratory, Orange, N. J. Dear Sir:- Agreeable to the request of your Mr. Mallory, I have looked up the people from whom we purchased the Novo Steel, and find that all of our purchases have been made from Hermann Boker & Co., 101 & 103 Duane St., New York. The brand was "Novo Steel". We find the that there is quite a difference in the way this Steel is tempered after working it into shape for tools. In our experience we find that the Steel should be heated to very near nearly welding heat, which is considerably more than the cherry red used with other Steels, and in tempering we find it best to use an air blast of quite a little force. If the Steel is not heated to nearly the welding heat before putting it into the air blast, it is liable to crack, so that to be safe in [hardening?], it should be borne in mind that the heat should be very nearly white heat. Possibly your blacksmith may think there is danger of burning the iron, but after the first trial, he will see that there is no danger in that. In working this Steel with our tools, we find that we can carry a cut of nearly 100 ft. per minute on machinery Steel. Enclosed I send you an advertisement in the American Machinist, which gives the experience of Messrs. Boker & Co. in regard to the use of Steel and milling cutters, I can attest that their assertions are not overdrawn. Yours truly S/L [ADVERTISEMENT]