US Patent: 346,133
|
Lathe-chuck
Universal lathe chuck
|
|
Patentee:
|
|
| Charles A. Singer (exact or similar names) - New York, NY |
| Manufacturer: |
| Not known to have been produced |
|
|
Patent Dates:
|
| Applied: |
Nov. 25, 1885 |
| Granted: |
Jul. 27, 1886 |
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward
Jeff Joslin
|
|
Description: |
| This chuck is a "universal" chuck where the jaws can be moved either together or independently. "Combined universal and independent chucks, as heretofore made, have been on two kinds, namely:"First. In chucks of the first kind the jaws are capable of being disconnected from the motive gear by which their universal movement is effected, whereupon each jaw may be propelled outward or inward by its own screw. When it is desired the render the chuck universal again, all the jaws must be set to positions equally distant from the center, whereon they are reconnected to the motive gear. The motive gear in this kind of chuck is most commonly an annular rack engaging pinions on the radial screws which propel the jaws. The well-known 'Sweetland' chuck is an example of this class."Second. In chucks of the second kind the jaws are connected to the motive gear through the medium of sliding pieces or boxes deeply embedded in the body of the chuck, these boxes being always in connection with the motive gear, and the jaws being adjustable relatively to the boxes by means of screws, which are journaled in the boxes and engage threads in the jaws. The motive gear is usually a scroll-ring, the spiral teeth on its face engaging teeth on the back of the boxes, so that as this ring is turned the boxes move out or in radially together, carrying the jaws with them. Each jaw may then be adjusted relatively to its box by its individual screw. The well-known 'Westcott' chuck is typical of this class."The disadvantage of both classes of universal chucks is that switching from independent to synchronous modes requires a careful and time-consuming adjustment of the jaws to identical distances from the center. Singer's innovation was to build a universal chuck with synchronous jaws, and on each jaw rides a secondary jaw that can be adjusted relative to it by a radial screw. This design works well when the synchronous jaws are used for small work and the 'independent' jaws are used for larger work. |
|
