Worm Gearing

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. It is understood, of course, that by the number of threads is meant, not the number of threads per inch, but-the number of threads in the whole worm — one, if it is single-threaded, four, if it is quadruple threaded...