Inverted Graham Anchor Clock Escapement Adapted by Reuleaux
- Title:
- Inverted Graham Anchor Clock Escapement Adapted by Reuleaux
- Title (German):
- Hemmung mit umgekehrtem Graham-Anker, Uebergangsmodell von Reuleaux
- 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:
- X8
- File Name:
- X08.jpg
- Work Type:
- Mechanical model
- Materials/Techniques:
- cast iron and brass on wood pedestal
- Subject:
- Kinematics of Machinery
- Measurement:
- 217 x 234 (millimeters, width x depth)
217 x 234 x 487 (millimeters, width x depth x height) - Description:
- Clocks are not pure kinematic mechanisms because their motions are governed by the Newtonian Laws of Motion as well as the geometric constraints between the machine elements. An escapement regulates the energy added each cycle of the pendulum through the falling weight to make-up for the energy loss in the bearings. The classic anchor escapement, invented by George Graham around 1730, consists of a wheel of teeth, driven by the moment of the weight and the gear train and two recoil pallets attached to the pendulum. In the so-called dead-beat Graham anchor the pallets are attached to a twin-arm or circular-shaped holder that sits on top of the escapement wheel. In model X-8, Reuleaux has turned the c-shaped anchor upside down. As the pendulum oscillates, the escapement wheel engages one of the pallets on the pendulum and adds a small impulse while allowing the sheel to advance one tooth pitch. [Francis Moon, 2004-07-00]
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.