Official Gazette of the United States Patent Office Volume 81 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1898 Excerpt: ...of said shaft carrying a knife, substantially as set forth. 3. In a root-digging machine, a topping device consisting of a bracket, a hollow guide-piece at each end of said bracket, guide-rollers carried by Mid guide-piece, a vertically-adjustable shaft mounted in the guide-piece, a projecting shoe carrying a knife located at the lower end of said shaft, an S shaped bar fixed to the forward end of the shoe and the upper end of the shaft, and two outwardly-curved arinsatlacbed to said shaft, each arm carrying a shoe at its extremity, substantially as set forth. 4. In a root-pulling machine, the combination with the crankshaft, of a fork-wheel, consisting of two guide-pieces adjustably mounted on said shaft aud provided with cam-grooves, a disk revolubly mounted on the uave of each guide-piece and provided with projections, adjusting screw-bolts working in said projections, slotted boxes arranged on the periphery of said disks, a lifting or gripping device mounted in said boxes, and a slide-roller mounted on the end of the shaft of the said gripping device and adapted to work in the cam-grooves of the said guide-pieces, substantially as set forth. 5. In a root digging or raising machine, the combination of fork wheels, comprising two guide-pieces adjustable on a fixed shaft, grooves formed on their periphery, two revoluble disks simultaneously adjustable toward or away from one another with the guidepieces, the periphery of said disks being provided with boxes open to the outside, and standing inward, a gripper or lifting device m ed between each two of said boxes, and a pin on said gripper resting in slots in said boxes, said gripper having a shank projecting into the fork-wheel and carrying a roller engaging with one of the guidepieces, whereby the gripping...