Page 507 - My FlipBook
P. 507
FiQ. 315.
Fig. 315. The thrust dynamometer, designed by the author, by which a quick thrust of a definite
number of pounds can be made. The broad liand on the dial when pushed around by the small hand,
retains its position, marking the number of pounds in th? thrust. There is also an attachment by the
adjustment of which the lever may be stopped at any definite number of pounds determined upon for
repeated thrusts, for obtaining greater exactness.
