. American engineer . out stopping the main driving shaft. When electric driven, the motor is mounted on top of thecolumn as is shown in the illustration. This arrangementeliminates many gears and shafts, and gives a high efficiencyof transmission, permitting the use of smaller motors. Whenbelt driven the pulley is at the rear of the bed and drives thevertical shaft through beveled gears. Friction clutches are used on the vertical high speed shaftand also for engaging power feeds, thus providing yieldingpoints which prevent damage to the mechanism. All gears andmoving parts are enclosed and fu
. American engineer . out stopping the main driving shaft. When electric driven, the motor is mounted on top of thecolumn as is shown in the illustration. This arrangementeliminates many gears and shafts, and gives a high efficiencyof transmission, permitting the use of smaller motors. Whenbelt driven the pulley is at the rear of the bed and drives thevertical shaft through beveled gears. Friction clutches are used on the vertical high speed shaftand also for engaging power feeds, thus providing yieldingpoints which prevent damage to the mechanism. All gears andmoving parts are enclosed and fully protected. A self-oilingsystem supplies lubrication for the driving and feedingmechanism. GRAPHITE LUBRICATOR Graphite in either stick, powdered or flake form, dependingon the character of the surface to be lubricated, has been suc-cessful as a lubricant for bearings and in some cases for cylin-ders exposed to a high temperature. Difficulty has been en-countered when material of sufficient purity was not employed,. steam Chent National Graphite Lubricator. and also, when fed automatically, in keeping the supply con-tinuous. A lubricator for supplying graphite to locomotive cylindersand valves where it is to be used in connection with oil, is shownin the accompanying illustration. This device uses graphite instick form, and is applied in a vertical position on the top ofthe steam chest, the graphite being discharged by gravity to thelive steam chamber. The stick of graphite is held on top of a December, 1912. AMERICAN ENGINEER. 649 toothcil abrasive wheel by means of a spiral spring. Thisabrasive wheel is rotated through the medium of a connectionto the valve stem or a similar moving part of the finely divided graphite is discharged to an opening justbelow the abrasive wheel and from here goes to the steam pas-sage. -A connection is arranged for the oil pipe from the cabjust aliove the attachment to the steam cliest so that tlic graphitepowder mixes with the o
Size: 1312px × 1904px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912
