Model: 074 Worms and Gears
- imagemovie
This combination shows the method of changing rotation of driven gear. Note the right and left hand angle of the threads in the continuous screw or worm. Teeth in lower gears have corresponding left and right angles. The threads of these worms are of the multiple type and have five leads while that in No. 72 is a single thread, having only one lead.
[Virginia Downward & William M. Clark, 1930]
Editor’s Note:
This model illustrates a another version of an "endless screw" mechanism. An example is in the Reuleaux-Voigt Collection, model C-9. The endless screw or worm drive gearing was also used by Renaissance engineers such as Leonardo da Vinci. See example his Codex Madrid, Folio 17 verso. [To access on line see KMODDL references.] FCM
[Virginia Downward & William M. Clark, 1930]
Editor’s Note:
This model illustrates a another version of an "endless screw" mechanism. An example is in the Reuleaux-Voigt Collection, model C-9. The endless screw or worm drive gearing was also used by Renaissance engineers such as Leonardo da Vinci. See example his Codex Madrid, Folio 17 verso. [To access on line see KMODDL references.] FCM
Francis Moon 2005-00-00
Reference :
- Brown : Five Hundred and Seven Mechanical Movements (p. 14, 1871)
- Reuleaux, Kennedy : Kinematics of Machinery (p. 83, 1876)
- Clark, Downward : Mechanical Models (1930)
- da Vinci : Codex Madrid I (Folio 17 Verso r, 1974)
Resources :
- Movie : DaVinci Endless Screw CAD Movie
- Movie : Reuleaux C.09 Endless Screw or Worm Drive Mechanism CAD Movie
Related Models :
- Reuleaux : Endless Screw or Worm Drive Mechanism
- Chicago : Helical Worm Gear Pair [Endless Screw]
