Methods of machine shop work : for apprentices and students in technical and trade schools (1914)
Halsey, Frederick A. (Frederick Arthur), 1856-1935 · New York : McGraw-Hill · leaf 131
sunk in the yoke,do not show in the illustration. Unlike the Newall gage, thesescrews are adjusting screws only and do no measuring, the ad-justment being determined by means of Mr. Johanssons com-bination gages shown in Fig. 105. THE JOHANSSON COMBINATION GAGES These combination gages, which made… … Fig. 104.—Johansson limit gage. GAGES 121 set of these gages was sent to the National Physical Laboratoryof Great Britain for examination. The laboratory reported thatof the entire set no discoverable error could be found in anyexcept two, the error of these two being a hundred thousandth ofan…
Machine-shop practice
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