"Industrial-railway Turn-table. a, circular base with channel for ball-bearing, showing ring of balls; b, under side of table; c, table in position, showing cross-tracks; d, latch for cover. A car is run by hand on the turn-table, the table turned one quarter of the way round, and the car run off on a track at right angles to the first track." -Whitney, 1911

Railway Turntable

"Industrial-railway Turn-table. a, circular base with channel for ball-bearing, showing ring of balls;…