previous next

Sphere-turn′ing lathe.

A lathe for turning billiard-balls and similar objects to a truly spherical form. In Hyatt's (Fig. 5376), the ball is held between chucks a, attached to opposite spindles, and moved toward each other by right and left hand screws. These are operated by two spur-wheels b b gearing into two other spur-wheels c c on a longitudinal horizontal shaft, so that the ball may be chucked centrally over the center around which the tool-post is carried. The tool-post d is attached to a disk e in the center of the lathe, having a threaded periphery engaged by a worm, by which a circular motion equal in amount to the width of cut of the tool is imparted to it at each revolution of the ball.

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 United States License.

An XML version of this text is available for download, with the additional restriction that you offer Perseus any modifications you make. Perseus provides credit for all accepted changes, storing new additions in a versioning system.

hide Places (automatically extracted)

View a map of the most frequently mentioned places in this document.

Download Pleiades ancient places geospacial dataset for this text.

hide People (automatically extracted)
Sort people alphabetically, as they appear on the page, by frequency
Click on a person to search for him/her in this document.
Hyatt (1)
hide Display Preferences
Greek Display:
Arabic Display:
View by Default:
Browse Bar: