. Testing electrical railway bonds . a known numDer of feet of solid rail in which the same currentis flowing, regardless of the value of that current. This is tne principle upon which this thesis is based. Experiments. - first experiment was conducted to deter-mine whether the current flowing thru the rails from the carsoperating would cause a drop in a 300a track great enough withinthe car lengtn, bo be measured with an oruinary was constructed as shown in Figs. 1, 2 and 3. Twostrap irons, L, were bolted to the side bar of the truck. Thesewere bent back under t
. Testing electrical railway bonds . a known numDer of feet of solid rail in which the same currentis flowing, regardless of the value of that current. This is tne principle upon which this thesis is based. Experiments. - first experiment was conducted to deter-mine whether the current flowing thru the rails from the carsoperating would cause a drop in a 300a track great enough withinthe car lengtn, bo be measured with an oruinary was constructed as shown in Figs. 1, 2 and 3. Twostrap irons, L, were bolted to the side bar of the truck. Thesewere bent back under the truck and an oak board, 0 bolted totheir lower ends over the rail. Angle irons R, were boltedto the board and set screws thru these held the brushes inplace. ihe brushes were constructed by cutting #20 steel wire into lengths of 3-3/4, and soldering them together at oneend, as shown in Fig. 3. Two of these brushes, A and C, (Fig. 1were placed on the board four feet apart. F I G 1 Tr u c K X t Fr A M e: Oa K vBrush Side View FIG 2. FI G 3testingelectrica00ande
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