that the instru The cones, B, Fig. 4, are only in contact with the upper letters to figures, and vice versa, also serve as spacers, half of the circle of balls, the lower half of the cones ana it is unnecessary to hold these keys down being cut out and a cast steel bearing block, A, in- while the… … omitted, a white disk marked ‘‘ Please Synchro.” S ze. appears on the front of the apparatus, to remind (2) hardness by treatinent with the Harvey process. It the operator of his omission. It is intended to | replace this arrangement by a locking mechan- will be seen that this block really takes…
Internet Archive · Public domain (published before 1931). Free to use for anything.
