. The Street railway journal . i ins.; intermediate corners, 2^ ins. x 4^ ins.; crown pieces,3I/2 ins. X 10 ins.; corner posts, ins. thick, and thickness ofthe side posts, ins. NEW JOURNAL BEARING ELECTRIC-DRIVEN AIR COMPRESSORS It is pointed out by many practical railway men that the wickor pad oilers now in common use for journal bearings soon be-come gummy and develop a hard polished contacting surfacewhich the oil cannot penetrate. This is due to their beingpressed against the journal, whereby the fibres of the materialbecome so packed that the oil cannot get through. In a shorttime the dr
. The Street railway journal . i ins.; intermediate corners, 2^ ins. x 4^ ins.; crown pieces,3I/2 ins. X 10 ins.; corner posts, ins. thick, and thickness ofthe side posts, ins. NEW JOURNAL BEARING ELECTRIC-DRIVEN AIR COMPRESSORS It is pointed out by many practical railway men that the wickor pad oilers now in common use for journal bearings soon be-come gummy and develop a hard polished contacting surfacewhich the oil cannot penetrate. This is due to their beingpressed against the journal, whereby the fibres of the materialbecome so packed that the oil cannot get through. In a shorttime the dry fibres are carbonized by the friction of tlie FIG. 1.—SECl JUNAL ViiiVV OF JOURNAL BOX, SFIOWING OILERIN POSITION forming a hard abrasive surface that is very severe on the lifeof the journal and its bearings. To overcome this defect, the Armstrong Journal Oiler Com-pany, of Philadelphia, has brought out the radically differenttype of oiler shown in the accompanying illustrations. Thematerial used is a combination of cotton and wool woven intoa plush pad, but only the buttons shown in Fig. 2 press against Power-driven air compressors are usually provided with eitherbelting or gearing for the transmission of power to the com-pressor shaft. However, belting requires a great deal of floorspace and is a source of constant expense, both on account oflost power and the cost of maintenance. Gearing is more com-pact and more sightly than belting, but is noisy and even moresubject to wear and friction. The compressor shown in the accompanying illustration, re-cently built by the Laidlaw-Dunn-Gordon Company, solves thisquestion of power
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
