. American engineer . -J^4\<——^^----A Fig. 1—Stand for Holding Mounted Driving Wheels. The top bar is slotted to receive the axle supports, which arerounded to the shape of the axle and keep it from rolling are held by pins which pass through one of the fourholes, and in this way provide for the different diameters ofdrivers. TESTING M.\CHINE FOR BOYER SPEED RECORDERS. An outline of a machine that is used to calibrate and test Boyerspeed recorders is shown in Fig. 2. It was originated by the-tool room foreman at Gallon, being construcfted with a frictiondisc to give the varying spe
. American engineer . -J^4\<——^^----A Fig. 1—Stand for Holding Mounted Driving Wheels. The top bar is slotted to receive the axle supports, which arerounded to the shape of the axle and keep it from rolling are held by pins which pass through one of the fourholes, and in this way provide for the different diameters ofdrivers. TESTING M.\CHINE FOR BOYER SPEED RECORDERS. An outline of a machine that is used to calibrate and test Boyerspeed recorders is shown in Fig. 2. It was originated by the-tool room foreman at Gallon, being construcfted with a frictiondisc to give the varying speeds. The disc A is held in a wroughtiron frame and is driven by an 8-in. pulley B. A 5-in. frictionwheel C. which is made up of a leather disc between two speed recorder. When the correct speed has been attained thisbearing is clamped, as indicated by the split end on the frame, toprevent the shaft from working in or out. The pulley E is freeto slide on llie shaft and is driven by a set screw through itshub. wliich has a sliding fit in the keyway in the shaft. It isheld in position by two collars, one formed by the machine itselfand the other by an arm fastened to the base. The friction pul-ley is held in the screw bearing F. which regulates the bearingpressure between the disc and the friction pulley C. This bear-ing is kept from rotating by a pin which extends through it andthe frame. The machine is driven in this specific case from anemery wheel by a l;4-n. belt, with which a speed of from oneto 100 m. p. h. may be obtained. The machine runs smoothlyand gives very good results, showing no vibration of the pen onthe recording chart. DEVICE FOR PRESSING IN HOSE CONNECTIONS. The device shown in Fig. 3 is used for applying the couplingco
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912
