Change Gear Devices

by Oscar Perrigo
reprinted by Lindsay Publications Inc

"Showing the development of the screw cutting lathe and the methods of obtaining various pitches of threads."

Perrigo, author of "Lathe Design" which we have reprinted in the past, considered 164 different patents pertaining to change gears issued from 1854 through 1903 when this was written. After throwing out all the impractical designs, Perrigo examines the remaining twenty-nine.

You get small, well-illustrated, fascinating book showing how the headstock of the engine lathe could be geared to the leadscrew to get exactly the feed needed. It's not only about gearing, it's about the history of the lathe, the ingenuity that went into machine design in general.

There are only three chapters as such: early lathe history, the patents, and the conclusion. But you'll see an old lathe with an oak bed, thread chasing techniques, pin gears and lantern pinions, and then gearing patents by Sellers, Humphreys, Bley, Miles, Riley, Wendel Norton, and many others.

Fun reading for the machine nut (like you.) Great history. Interesting details about how these devices worked (some seem quite strange) and what their strengths and weaknesses were. A gem of a little book. I think you'll like it. Get one. 5-1/2 x 8-1/2 softcover 81 pages

No. 23004 ... $8.95