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Model: N12 Intermittent Gear-Lever Mechanism
(Voigt/Reuleaux)
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Model Metadata
Taxonomy:
Voigt
Group:
Ratchet Mechanisms
ID:
N12
Title (English):
Intermittent Gear-Lever Mechanism
Title (German):
Schaltwerk mit ruhender Sperrung
Creator:
Franz Reuleaux
Date Created:
1882-00-00
Manufacturer:
Gustav Voigt Werkstatt
Size:
Base: Width x Depth [199,88]mm; Overall: W x D x Height [232,107,249]mm
Medium:
cast iron and brass on wood pedestal
Rights:
For educational use only. All rights reserved by the contributor(s) and publisher(s).
Audience:
General public
Keywords:
ratchet, gear
Description:
This device consists of a cam actuated lever, a crank with a small two-tooth cam wheel, and a larger 42 tooth gear wheel. When the crank turns through one cycle, one tooth of the cam wheel raises the lever while the other tooth advances the gear by one tooth. When the lever is released, a small point-shaped extension of the lever sits between the gear teeth and locks out any further motion. This mechanism consists of two kinematic chains when the motion is engaged-- a three link chain with two lower-order cylinder pair joints and one higher order sliding joint, and another chain of three links consisting of the gear-cam/higher order pair and two lower order cylindrical pairs. This mechanism, like many ratchet type mechanisms requires so-called ‘force closure’ since the lever pawl relies on gravity to maintain the locking of the gear wheel.
Descr Author:
Francis Moon
Descr Date:
2004-07-01
Image Metadata
Title:
N12. Intermittent Gear-Lever Mechanism
Rights:
Jon Reis/www.jonreis.com. Jon Reis Photography grants Cornell University Libraries, and the Cornell College of Engineering the rights to display copyrighted images of the Reuleaux Collection of Kinematic Mechanisms on the Cornell University and National Science Digital Library web sites and for unlimited use in Cornell University Library publications for education purposes only. Rights for all other uses such as editorial, advertising, web use and display by third parties not affiliated with Cornell University are reserved by the photographer.
Descr:
Date Created:
2005-01-19 11:02:16
URL:
http://kmoddl.library.cornell.edu/stillImages/small/N12.jpg
Size (w x h):
384 x 256

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