CHAPTER VIII,
THE AMERICAN THOMPSON IMPROVED
INDICATOR.
LEADING PULLEY,
The leading pulley consists of a wheel which leads the cord through the hole to the scored wheel, over which the cord can be run any possible angle to connect with the motion, wherever it may be. The pulley works in a sleeve which rotates in the stand according to adjustments required, and is held in its position and adjusted by a thumb-screw work-
FIGURE 54.
ing in a groove on the sleeve, which acts as a binding screw. In this manner it is held in any desired position, and is free to revolve the moment the binding screw is loosened. By means of a set screw the stand which carries the wheel can be adjusted to run the cord to any possible angle within a range of 360 degrees. This improved swivel pulley does
