. The Street railway journal . f the slots. Thefish-plates, which are wedge shaped laterally, arc then driveninto position. 851,029. Trolley Retriever; Simeon F. Pierce. St. Paul, filed Oct. 30, 1905. A pneumatic cylinder tensions aspring which normally holds the pole in raised position. A dashpot device causes a valve to relieve the air pressure in case of anabrupt upward movement of the pole. 851,273. Triple Valve; Robert PI. Blackall, Edgewood Park,Pa. App. filed June 13, 1903. A quick action triple valve devicehaving a small passage for equalizing the auxiliary reservoirand train
. The Street railway journal . f the slots. Thefish-plates, which are wedge shaped laterally, arc then driveninto position. 851,029. Trolley Retriever; Simeon F. Pierce. St. Paul, filed Oct. 30, 1905. A pneumatic cylinder tensions aspring which normally holds the pole in raised position. A dashpot device causes a valve to relieve the air pressure in case of anabrupt upward movement of the pole. 851,273. Triple Valve; Robert PI. Blackall, Edgewood Park,Pa. App. filed June 13, 1903. A quick action triple valve devicehaving a small passage for equalizing the auxiliary reservoirand train pipe pressures, said passage being opened by the move-ment of the triple valve piston to its normal emergency position. 851,277. Fluid Pressure Brake; Francis L. Clark, Pittsburg,Pa. App. filed July 14, 1904. A primary brake cylinder and pis-ton and a secondary brake cylinder and piston independent ofthe first brake piston, and a fluid-pressure operated clutch orlocking mechanism for one of the brake pistons. PERSONAL MENTION.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
