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Model: L05 Positive Return Cam
(Voigt/Reuleaux)
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Model Metadata
Taxonomy:
Voigt
Group:
Positive Return Constant Breadth Cams
ID:
L05
Title (English):
Positive Return Cam
Title (German):
Ungleichseitig. Bogenfünfeck mit verstellb. Schleife
Creator:
Franz Reuleaux
Date Created:
1882-00-00
Manufacturer:
Gustav Voigt Werkstatt
Size:
Base: Width x Depth [200,88]mm; Overall: W x D x Height [290,117,203]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:
Description:
A cam is a kinematic pair in which one part is free to slide against the surface of another part. In the L series of models one part is rotated against a straight or curved surface forcing the latter to move in a horizontal or straight-line motion. The action is closed kinematically by using a curve of constant width between two surfaces separated by a constant distance. In model L-1, the former is a curved triangle known today as a Reuleaux Triangle [see model B-2] In Model L-1, the carved triangle is rotated about one of its vertices. This produces two phases of exact finite time dwell in the motion cycle. In model L-5 the rotor is a five-sided curved polygon of constant width. A screw allows the center of motion of the curved pentagon to be changed. The parallel guides are set to 45¼. Positive return cams were used in the control of valves in steam engines in the early 19th century. They are still used in modern machines to impose a given motion to a part during a machine cycle. Cams in general are used extensively in automotive engines. However cam contact is generally maintained with elastic springs instead of parallel guides.
Descr Author:
Francis Moon
Descr Date:
2003-07-01
Image Metadata
Title:
L05. Positive Return Cam
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/L05.jpg
Size (w x h):
384 x 258

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