[D0330AAK1], Letter from Ideal Cash Register Co to Thomas Alva Edison, August 7th, 1903


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[D0330AAK1], Letter from Ideal Cash Register Co to Thomas Alva Edison, August 7th, 1903




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Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University


Letterhead of Ideal Cash Register Co
Bound Brook, N. J.
August 7, 1903.
Mr. Thos. A. Edison
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 [illegible], 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
<Why not buy this at Cement Lab & Galley Co>
<[My dash?]>
[TAE Marginalia] of Steel and milling cutters, I can attest that their assertions are not overdrawn.
Yours truly
The Work of a Novo Milling Cutter.
A 3 1/2" diameter, 7/3" wide, Novo side-milling cutter milled 7/3" deep grooves into hard cast iron, through the scale, at 210 revolutions per minute, with 6 1/2" feed per minute, and milled 13 grooves, each 18" long. The cutter showed absolutely no sign of wear. A milling cutter of some of one of the best grades of crucible steel, when tried under the same conditions, would not run 3".
Hermann Boker & Co.,
101-103 Duane Street,
New York.
Chicago Office and Warehouses :
63 N. Desplaines Street.
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