Richardson's handbook of projection (1927)

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MANAGERS AND PROJECTIONISTS 612 square in form, telescopes into a square opening in rod 2. Plate III illustrates the mechanism contained in controller B, Plate I. In Plate III gear 10 in the left hand illustration is the one which meshes with gear 44 in the right hand illustration (the right hand illustration being the under side of the cover of controller B, Plate I) which latter, through bevel gear 50, drives rods 2 and 2A, Plates I and II. Now follow closely : Spring 41, Plate III, is attached to part 23 by slipping the bend in the end of spring 41 into eye hole 22 of part 23. When cover 40 is in place and tension is supplied to spring 41 by means of adjusting dial 20, Plate I, which operates on threaded bolt 45, Plate III, it has the effect of holding part 23, Plate III, back in the direction of arrow point 34, Plate III. Part 28-28 are governor weights attached to governor yoke 27 by means of hinge pins 35 and 47, and right here is what might be termed the heart of the whole machine. P a r t 33 swivels on part 32, and the whole governor is rigidly attached to the main driving shaft by pin 38 in part 27. Part 31 is a steel tooth attached to part 23, and protruding % on an inch on the side next to wheel 16. The parts between 27^, which is a ball-bearing, and part 26, which is another ball-bearing, comprise the entire governor assembly, which revolves at the speed of the motor armature shaft, with which the controller driving shaft is directly Plate II, Figure 212.