. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . is better than using the spring in compression. The spring is suffi-ciently long to be sensitive and still not be thrown from the plate when theengine strikes a curve, a trouble characteristic of all former instruments. Be-sides the main stylus there are three othersof identical construction. First, the zerostylus (8), which draws a straight line acrossthe roll and to which all deflections arereferred; second a stylus (9) which is on amagnet that is operated by a
. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . is better than using the spring in compression. The spring is suffi-ciently long to be sensitive and still not be thrown from the plate when theengine strikes a curve, a trouble characteristic of all former instruments. Be-sides the main stylus there are three othersof identical construction. First, the zerostylus (8), which draws a straight line acrossthe roll and to which all deflections arereferred; second a stylus (9) which is on amagnet that is operated by a Morse key in —MainStylususedinDrivingWheel ,, T_ J_^ ■ 1 . ^ 1- 1 • Spring Tests. (Goes and Howard.) the cab; third, a stylus (10) which is on a magnet and is operated automatically by a clock in the cab. The spanner bar (11) is shown in Fig. 21 and needs no description exceptits method of fastening to the spring link hangers and its mode of is fastened to the hangers by means of two blocks, which are slotted and fitover the ends of the hangers, these blocks being held on to the hangers by four. STYLUS SLIDE 52 STEEL RAILS hardened steel set-screws. The spanner bar (11) is connected to the stylusbar (b) by means of a short Hnk (Z). Thus, whatever relative movement isgiven the recording apparatus by the spring is transmitted as a vertical line onthe paper by means of the stylus bar (6) and the spanner bar (11). Hence,since the paper is being driven horizontally by the motor we have a wavy linegiving a complete record of every movement made by the spring, and by meansof the records made by the key and the times recorded by the clock we canaccount for most of the deflections due to frogs, switches, curves, crossings,brake applications, and bridges. The cab apparatus (Fig. 20) consists of a suitable box containing a portablestorage battery and six dry batteries. The storage battery gives 5 amperesfor 8 hours at a pressure of bolts. This runs the
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Keywords: ., bookcentury1900, bookdecade1910, bookidsteelrailsth, bookyear1913
