312 Matching Results

Search Results

Advanced search parameters have been applied.

Nut Lock.

Description: Patent for a new and improved nut lock. This design calls for a grooved nut and bolt to hold a pin between the two while the bolt is screwed onto the nut. Depending on whether or not the pin is in said grooves, the nut may or may not be removed from the bolt, which increases the worker's control over the nut and bolt and prevents unintended loosening.
Date: March 1, 1881
Creator: Bunker, John Williamson
Partner: UNT Libraries Government Documents Department

Switch-Stand.

Description: Patent for a switch-stand for railroads with a vertically movable crank bar that is easily locked into position and a cam lever. The invention is operated more easily than other switch-stands.
Date: September 4, 1894
Creator: Driever, Benjiman F. & Mixon, James W.
Partner: UNT Libraries Government Documents Department

Cultivator.

Description: Patent for a cultivator that can be used a riding or walking cultivator and has a better holder for the standards.
Date: January 31, 1911
Creator: West, John R.
Partner: UNT Libraries Government Documents Department