Grant, George B. (George Barnard), 1849-1917 · Boston, Grant gear works, incorporated · leaf 11
-act-ing and interchangeable, and it is not neces-sary that both sides of the tooth shall bealike. Again, the unsymmetrical gear of Fig. 13fails when it is turned over, upside down,for then the unlike odontoids come together,and, to avoid this last difficulty, all four ofthe lines of action must be… … Unsymmetrical teeth Fig.-14.
Gearing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
