Beaver-tail indexing mechanism

Description

The driving pinion revolves continuously and drives the gear through ordinary gear teeth except when the "beaver-tail" stop mechanism comes into action. The cam, whose shape is reminiscent of that of a beaver's tail, is intermittently controlled by two rollers. Further information about this mechanism can be found in _"Ingenious Mechanisms for Designers and Inventors"_, vol. 1 (1930), Industrial Press Inc., ed. Franklin D. Jones.  --- Original CAD files from [trinityscsp](https://grabcad.com/library/beavertail-indexer-mechanism-1). Animation generated in **Blender**.