. Electric railway journal . d Vents Open Vents Closed Vents Open73 deg. 63 deg. 71 deg. 57 deg. The car had 14 ventilators 28 in. by 7y2 in. in size; 140sq. in. per vent opening; total outlet of vent air openings,1960 sq. in.; air volume in car, 1900 cu. Air from blower per hour, 12,000 cu. ft. Air changes per hour, 6%. Minutes required for complete air renewal, 9%.The average temperature of the air coming out of theopenings under the seat was 190 deg. F. NATIONAL PORTABLE COMPRESSOR OUTFITS To satisfy the demand for a self-contained, reliable, porta-ble compressor outfit shops, power pl
. Electric railway journal . d Vents Open Vents Closed Vents Open73 deg. 63 deg. 71 deg. 57 deg. The car had 14 ventilators 28 in. by 7y2 in. in size; 140sq. in. per vent opening; total outlet of vent air openings,1960 sq. in.; air volume in car, 1900 cu. Air from blower per hour, 12,000 cu. ft. Air changes per hour, 6%. Minutes required for complete air renewal, 9%.The average temperature of the air coming out of theopenings under the seat was 190 deg. F. NATIONAL PORTABLE COMPRESSOR OUTFITS To satisfy the demand for a self-contained, reliable, porta-ble compressor outfit shops, power plants and track work,the National Brake & Electric Company has designed a mostdurable and convenient outfit consisting of a National typeH compressor and automatic governor, a combined switchand fuse, air gage, reservoirs and all necessary piping. Theentire equipment is mounted on a substantial angle ironframe supported on wheels. These portable outfits are builtin two styles with three and four-wheel trucks Portable Air Compressor In the three-wheel type the apparatus is drawn around bymeans of a wronght iron tongue attached to the pivotedfork in which the front wheel is hung. The four-wheel typeis fitted with castors on the two front wheels which permitthe truck to be turned and moved about as needed. Thesmall width of these portable outfits allows them to be ta-ken through doors and openings of much smaller breadththan the average. These portable compressors are buiH insix sizes in capacities of from 1! on. ft. to 50 on. ft. free airper minute. ALUMINUM TO COPPER MECHANICAL CONNECTOR At the Denver convention Dossen & Company, New York,exhibited a new mechanical connector for use in makingtap-offs from aluminum feeder cables to copper shown in the accompanying ilustration the connector issimilar to the standard Dossert cable tap with the exceptionthat the hook part of the connector is cast in aluminumwhile the shank is cast in copper and supplied wit
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