Pin Escapement
- Title:
- Pin Escapement
- Title (German):
- Stifthemmung von Lepaute
- Collection:
- Reuleaux Kinematic Mechanisms Collection
- Set:
- X. Clock Escapements
- Designer:
- Reuleaux, F. (Franz), 1829-1905
- Manufacturer:
- Gustav Voigt Werkstatt
- Date:
- 1882
- Country:
- Germany
- Voigt Catalog Model:
- X4
- File Name:
- X04.jpg
- Work Type:
- Mechanical model
- Materials/Techniques:
- cast iron and brass on wood pedestal
- Subject:
- Kinematics of Machinery
- Measurement:
- 217 x 240 (millimeters, width x depth)
217 x 240 x 490 (millimeters, width x depth x height) - Description:
- The escapement mechanism regulates the energy of the falling weight (shown behind the brass pendulum) to the oscillating pendulum. Early esacpements were the verge and folliot (X-1) and the anchor. In Model X-4, the weight at the top was designed to change the period of the device. The French were not quick to adapt to the anchor escapement that replaced most verge and foliet escapements in the 18th century. However the pin escapement, which may have had several inventors, was widely used in French tower clocks. It was also used by the American clock maker Seth Thomas in their tower clocks. One example is the famous landmark tower clock at Cornell University, Ithaca New York, which was installed in 1876. [Francis Moon, 2001-00-00]
The 220 models in Cornell University’s Reuleaux Collection were built in the late 19th century to demonstrate the elements of machine motion, as theorized by the German engineer Franz Reuleaux. The University acquired the models in 1882 for use in teaching and research. The Reuleaux models are classified according to the alphanumeric schema employed in the catalog of the manufacturer, Gustav Voigt. The letter in a model's ID (e.g., B14 or S35) refers to a class of mechanism; the number is a specific instance of the class. This classification scheme is a simplified version of the taxonomy of machine elements elaborated in Reuleaux's work. - Repository:
- Sibley School of Mechanical and Aerospace Engineering, Cornell University
- Format:
- Image
- Rights:
- Photography credit: 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 Reuleux collection of kinetic machines 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, including but not limited to, editorial, commercial, advertising, web use and display by third parties not affiliated with Cornell University are reserved by the photographer. The written permission of any copyright and other rights holders is required for distribution, reproduction, or other use that extends beyond what is authorized by fair use and other statutory exemptions. Responsibility for making an independent legal assessment of an item and securing any necessary permissions ultimately rests with persons desiring to use the item. For questions about this item or other items please contact the Physical Sciences Librarians at pslref@cornell.edu.