[2408]. Double cone rollers for a table having a horizontal circular motion.
[2409]. Roller bearing for wagon axle, with balls between the roller ends to separate them and prevent internal friction.
Anti-friction screws. See Nos. [2413], [2414].
Anti-friction worm gear. See [No. 2451].
[2410]. Vertical ball bearing, with bearing surfaces adjusted to receive the direct thrust of the balls.
[2411]. Suspended ball bearing.
[2412]. Ball or roller axle bearing.
[2413]. White’s anti-friction ball bearing screw and nut. A.D. 1822. Square thread screw, the balls travel round the screw thread, and by a pass-groove back to the other end again.
[2414]. Lieb’s anti-friction screw and nut, similar to the last, but with a concave grooved screw. A.D. 1890.