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Model: 050 ??? Ratchet Wheels and Drivers (Boston) or Pawl Drives & Stops (Newark) ???
(Voigt/Reuleaux)
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Model Metadata
Taxonomy:
Walker
Group:
[Nos. 49-64] Ratchet Wheels, Drives
ID:
050
Title (English):
??? Ratchet Wheels and Drivers (Boston) or Pawl Drives & Stops (Newark) ???
Title (German):
Creator:
William M Clark
Date Created:
1930-00-00
Manufacturer:
Size:
38.7cm x 38.7cm
Medium:
Cast aluminum and wood (painted) on a vertical panel.
Rights:
For educational use only. All rights reserved by the contributor(s) and publisher(s).
Audience:
General public
Keywords:
ratchet
Description:
The top model has an almost continuous motion. Watch action of stop pawl. The driver, having both pawls attached to it, acts as both stop and driver alternately. In the bottom model, the stop and driving pawls are independent. This is used in many ways, particularly in connection with counting devices on automatic machines. [Virginia Downward & William M. Clark, 1930] [Editorís Note: Ratchet mechanisms are like diodes and digital devices in electronics; limiting motion in one direction and permitting only discrete motions. Franz Reuleaux was very much intrigued with ratchet mechanisms so much so that his collection as produced by Voigt in Berlin contained 26 ratchet models in the N series not to mention 12 models in the X series on escapements. He also called some ratchet mechanisms click wheels. Clark designed this model after Figures 75, 76, 238, 240, 241 in Henry T Brown's 1868 catalog of mechanical movements. See also Clark model 50. FCM]
Descr Author:
Francis Moon
Descr Date:
2005-00-00
Image Metadata
Title:
050
Rights:
Digital file property of Cornell University Library. Made available under the same terms as a Creative Commons Attribution Non-commercial Share Alike License. For all other uses see KMODDL Rights & Permissions.
Descr:
Date Created:
2006-08-06 23:53:42
URL:
http://kmoddl.library.cornell.edu/stillImages/Clark/small/050.jpg
Size (w x h):
334 x 301

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