Scleroscopen.

1907 A. F. Shore in Amer. Machinist 14 Nov. 748/1 The instrument was named scleroscope, from the Greek words sclerotus, meaning hardness, and scope, because it is direct reading.

1908 Patent Specif. No. 10,752 An instrument [consisting of a hard pointed hammer allowed to fall from a predetermined height and means for measuring the rebound of the hammer] for testing the hardness of metals and other solid bodies..called the scleroscope.

1908 Iron Age LXXXII. 555 (heading) The Shore Scleroscope.

1915 Proc. Amer. Soc. Testing Materials 15 47 (title) Relation between Brinell Hardness and Scleroscope Hardness.

1921 Glasgow Herald 23 Sept. 9 The use of the scleroscope on light specimens of metals.

1923 Glasgow Herald 9 Mar. 7/1 A New Form of Magnified Hammer in the Scleroscope Hardness Test.

1936 P. F. Foster Mech. Testing of Metals & Alloys viii. 143 A dynamic hardness test is provided by the Shore scleroscope in which a small pointed tup weighing about 0·0052 lb. is allowed to fall freely from a height of 10 in. on to the test piece.

1961 Official Gaz. (U.S. Patent Office) 29 Aug. tm149/1 The Shore Instrument & Mfg. Company, Inc.,..N.Y...Scleroscope... For instruments used to test hardness of metals and other substances.

1977 R. B. Ross Handbk. Metal Treatm. 166 The Scleroscope test is of limited use and accuracy but, because of its extreme portability, has certain advantages over other more conventional tests.

1950 Engineering 31 Mar. 371/2 Scleroscopic hardness values are approximately 85 and 65.