Helix angle the helix angle. The efficiency can be plotted versus the helix angle for a constant friction, as shown in the adjacent diagram. The maximum efficiency is a helix angle between 40 and 45 degrees, however a reasonable efficiency is achieved above 15°. Due to difficulties in forming the thread, helix angle greater than 30° are rarely used. Moreover, above 30° the friction angle becomes smaller than the helix angle and the nut is no longer self-locking and the mechanical advantage disappears. In helical and worm gears, the helix angle denotes the standard pitch circle unless otherwise specified. Application of the
Less Than Kin Vickers, to get back to the United States, decides to impersonate him. He is taken to the family group upon his arrival in New York City and soon finds himself possessed of the encumbrances and debts left by the former youth, which include a wife and three children. He is left a fortune, but discloses his identity and flees to Canada. En route he marries the ward of his benefactor, who had helped him escape and had hid in his automobile. Eventually he is cleared of all guilt and has a happy ending. Less Than Kin Less Than Kin is