US Patent: 454,959
|
| Feed-Screw and Nut
|
|
Patentee:
|
|
| Edward A. Walker (exact or similar names) - Philadelphia, PA |
|
|
Patent Dates:
|
| Applied: |
Oct. 01, 1890 |
| Granted: |
Jun. 30, 1891 |
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward
Joel Havens
"Vintage Machinery" entry for Walker Brothers
|
|
Description: |
| Francis T. Chambers - patent attorney
My invention relates to feed-screws and nuts used in machines as planers to cause the table or tool-holder to travel over the frame; and my object is to so construct and arrange such devices that they shall be stronger and better fitted and held together than in the usual constructions. My invention relates particularly to the screw-feeds, in which, the feed-screw lies in a horizontal plane, and to prevent sagging is supported upon a rest or rests beneath it. With screws so supported it has heretofore been customary to use a yoke-like nut, which straddled the upper part of the screw and engaged only its top and sides, and such a device is obviously less strong and more liable to displacement and uneven wear than a nut which embraces the whole circumference of the screw. The chief feature of my device consists in using with the feed-screw a nut, the outer thickness only of which is cut away in part to clear the face of the screw-threads, while the threads of the nut are continuous and uninterrupted. Where the screw lies upon rests the nut is thus cut away to clear said rests, and at the same time it embraces the whole circumference of the screw and is held firmly in place thereon.
|
|
