Locomotive appliances . out one of thelead wires from the dynamo to lamp, turn on steamand take the speed. If the speed is above 2,500 revo-lutions per minute, the governor valves (No. 38, ) are cut and should be ground in or faced off tomake a perfect seat. This should be done once amonth. If the valves become cut too badly theengine will run away and be broken by centrifugalforce. The Dynamo—Its construction, care and maintenance.—The dynamo is constructed on the latestscientific principles, and the electrical balance is soperfect that no sparks should be seen at the armatur
Locomotive appliances . out one of thelead wires from the dynamo to lamp, turn on steamand take the speed. If the speed is above 2,500 revo-lutions per minute, the governor valves (No. 38, ) are cut and should be ground in or faced off tomake a perfect seat. This should be done once amonth. If the valves become cut too badly theengine will run away and be broken by centrifugalforce. The Dynamo—Its construction, care and maintenance.—The dynamo is constructed on the latestscientific principles, and the electrical balance is soperfect that no sparks should be seen at the armature is held in place on the engine shaft byone screw which can be easily taken out if occasiondemands. The brushholders are fixed, and thebrushes can be taken out and replaced without changing the tension of the springs. A graphite brush isused for the top and a carbon brush for the bottom,and if they be given only a few moments care eachtrip, there will be no trouble at all when on the road. 12 LOCOMOTIVE LOCOMOTIVE APPLIANCES. 13 The mica between the copper strips of the com-mutator should always be a trifle below the it gets too high, file it down with a small file. Donot get it too low, as it will collect dirt, etc., and causea short circuit. Be sure and have the brushes fit perfectly on thecommutator. If they have poor contact, the brusheswill spark. If the commutator is running dark andhas the appearance of getting rough, clean it up. Todo this nicely, remove the brushes and with a strip ofNo. 0 sand paper (not emery paper), about the widthof the brushes, holding by the ends of the sand paperon the commutator while running. Do not pressthe sand paper on with the fingers, for if there areany low spots they will increase in size. Names and Numbers of Parts. Fig. 2. 1 Main Casting, 5 rows Buckets. 31 Governor Weight. 2 Wheel, 5 rows Buckets. 32 Spring Clamp. 2* Wheel, 4 rows Buckets. 33 Cast Iron Washer. 3 Engine Cap. 34 Connecting Link. 5 Box Yoke.
Size: 1308px × 1911px
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License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectlocomot, bookyear1901
