ucing the point P. A straight line drawn from diametral pitch; then 3-1416 x 1-=-1-5 = 3-09 = required di- C to F, as denoted by G-, marks the distance for the compass GIVEN BY Willis ametral pitch. points to be set. Since the least error will make a great dif- To find the number of teeth contained… … ^Cbarafwe very fine, and the measurements made to great exactitude to S^ffhtojnkli line render this method thoroughly reliable. To show the differ- ence, in the case in point, between the arc and chordial Thidtness of toolh pitches, we may, in this construction, set the compasses to Breadlh g…
