Some Forms of Apparatus Used in the Course of Practical Instruction in ...
Some Forms of Apparatus Used in the Course of Practical Instruction in ...
Edward Tyson Reichert
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The tension of the spring is altered by the adjusting screw which holds the rod in the top of the standard, and is made suflBcient to maintain the rod in any position of its revolution in which it is placed. The other arm is fastened to the rod, and is moved towards and from its mate by the adjusting screw at- tached to it, at the same time turning the rod. When Digitized by Google 12 the handle is shifted to the right or left the whole device, together with the rod, is moved, the tension of th...e ring spring on tbe back being sufficient to cause the two arms and rods to move together. In practice, the Fig. 5.— The Frog Table. recording styles are brought in contact, or nearly so, with the drum by moving the handle to the left, and the fine adjustments of contact are obtained by turn- ing the adjusting screw at the right of the handle. Digitized by Google 13 A movement of the handle to the right throws off the styles to any desirable distance, as, for instance, when it is necessary to remove the drum to renew the record- ing surface.
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