. The Street railway journal . motors, making every point a running point. For d. the control will be rheostatic. The change forma. c. to d. c. control is made by a commutating switch operatedby the reverse handle. The main power circuit is closed bytwo main switches, one for a. c. and the other for d. c. opera-tion, so interlocked that they cannot be closed together, and soarranged that either one will open automatically if closed by-mistake upon the wrong circuit. Each car equipment is fur-nished with a trolley, air compressor and air brake. The aircompressor is driven by a compe
. The Street railway journal . motors, making every point a running point. For d. the control will be rheostatic. The change forma. c. to d. c. control is made by a commutating switch operatedby the reverse handle. The main power circuit is closed bytwo main switches, one for a. c. and the other for d. c. opera-tion, so interlocked that they cannot be closed together, and soarranged that either one will open automatically if closed by-mistake upon the wrong circuit. Each car equipment is fur-nished with a trolley, air compressor and air brake. The aircompressor is driven by a compensated motor operating onboth a. c. and d. c. current The line equipment is 000 cate-nary construction trolley and three No. 2 copper high-tensionline. The rails are 70-lb. A. S. C. E. section. The first carsput in service will run on local service from Waterloo to Ken-dallville as soon as the northern end of the line is ballastedsufficiently. 56 STREET RAILWAY JOURNAL. [Vol. XXVII. No. i. SOME INTERESTING RAILWAY SPECIALTIES. FIG. 1.—TOOL GRINDER MOUNTED ONIRON COLUMN A point often overlooked in the construction of tools andother appliances for work in the field is that such tools areusually put into the hands of lahorers rather than mechanics,and are consequently subjected to very rough usage. Theworking parts of such a tool should be covered and protectedas well as possible,and the machine it-self should be builtwith lines of strengthat every point. Thatthese facts have beenappreciated in the de-sign of the drill andtool grinder made byCooks Railway Ap-pliance Co., of Kala-mazoo, Mich., may beseen from the accom-panying illustration,Fig. i, showing thetool grinder mountedon an iron column. The tool grinder is intended primarily for field work, being-built so that it can be readily attached to the top frame of thecompanys standard rail drill by removing the crank handle,or it may be used on a malleable-iron column, both of which areinterchangeable with the grinder. The emer
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
