. Illustrated catalogue and general description of improved machine tools for working metal . ge tostop at top and bottom of hoistway, regardless of whether or not the shifting-rodis moved ; that is, the machine stops when the drum has made the desired num-ber of rotations. This arrangement is certain in its action, and is a valuable ad-dition to the ordinary stops on the shifting-rod. WORM HOISTING MACHINES. Nominal Rating. Diameter ofWorm-Wheel. Usual Diameterof Drum. Diameter ofPulleys. Usual , per Minute. 1000 4000 101830 141836 162430 212275225 Other drums can be furnis
. Illustrated catalogue and general description of improved machine tools for working metal . ge tostop at top and bottom of hoistway, regardless of whether or not the shifting-rodis moved ; that is, the machine stops when the drum has made the desired num-ber of rotations. This arrangement is certain in its action, and is a valuable ad-dition to the ordinary stops on the shifting-rod. WORM HOISTING MACHINES. Nominal Rating. Diameter ofWorm-Wheel. Usual Diameterof Drum. Diameter ofPulleys. Usual , per Minute. 1000 4000 101830 141836 162430 212275225 Other drums can be furnished in each case when required. We make cages or platforms for elevators to order, as well as all the iron-work for the guides, etc., and are prepared to supply safety catches, operated byspring or counterweights, as well as the Tatham and Britton safety arrange-ment, in which a pendulum suspended below the car vibrates in grooves in theguide-irons. In this device, as long as the proper speed is maintained, the pen- Wm. Sellers & Co., Incorporated, Philadelphia, Pa. 257 Plate No. 2000-LB. WORM HOISTING MACHINE. Worm-wheel, :8 diameter. 24 pulle5s, 4 belt to hoist ; 2 belt tolower. Complete with 18 drum, and grooved for wire rope ; belt shifter ; auto-matic brake ; automatic stop-motion ; counterweight for brake, and outboard sup-ports for drum-shaft and pulley-frame. ^T>i 258 Wm. Sellers & Co., Incorporated, Philadelphia, Pa. duluni vibrates freely, but should the motion of the cage be unduly accelerated,the pendulum at once jams and throws into operation a pair of toothed clutcheswhich lock the cage absolutely and prevent further movement until the car israised to disengage them. This is an absolutely certain safety device, andprovides not only against accident from breakage of the rope, but from the runningaway of the hoist, due to any other cause. SPUR-GEARED HOISTING MACHINES. We show in Plate No. 214 a spur-geared hoisting machine, driven byopen and cross-belts th
Size: 1456px × 1715px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookidillu, booksubjectmachinery
