. Locomotive text for engineers and firemen; a complete treatise on the engine, electric head-light and standard code of train rules . TRIFUGAL BRAKE. List of Parts. 133 Brake Shoe I35~b Brake Saddle Screw,133-a Brake Shoe Roller large 134 Brake Shoe Spring 136 Adjusting Nut 135 Brake Saddle To prevent any possibility of accidents being causedby varying loads on the engine a centrifugal brake,is attached to the turbine wheel. Plate 135shows a sectional view of this brake. It is placed 296 THE ELECTRIC HEADLIGHT. on the back side of the wheel 2^, and is so ad-justed that it acts at a speed of a
. Locomotive text for engineers and firemen; a complete treatise on the engine, electric head-light and standard code of train rules . TRIFUGAL BRAKE. List of Parts. 133 Brake Shoe I35~b Brake Saddle Screw,133-a Brake Shoe Roller large 134 Brake Shoe Spring 136 Adjusting Nut 135 Brake Saddle To prevent any possibility of accidents being causedby varying loads on the engine a centrifugal brake,is attached to the turbine wheel. Plate 135shows a sectional view of this brake. It is placed 296 THE ELECTRIC HEADLIGHT. on the back side of the wheel 2^, and is so ad-justed that it acts at a speed of about 150 revolutions perminute greater than that at which the governor the wheel attains a velocity great enough to over-come the tension of spring 134, the brake shoes 133travel out until they come in contact with the wall of themain casting 101, and so prevent the speed of the turbinewheel from exceeding a certain limit. The applicationof this brake began with the equipment, bearing the man-ufacturers serial number 2600, and it will not be found,nor can it be applied to equipments with a lower serialnumber than PLATE 135. To adjust the .centrifugal brake, the armature, enginecap and governor should be removed, and the wheel andshaft pulled out, giving free access to the brake. To de-crease the speed, all nuts should be turned to the left, andto increase speed, all nuts should be turned to the turn of the nuts will change the speed at which THE ELECTRIC HEADLIGHT. 297 the brake will act, 150 revolutions per minute. How-ever, it is seldom necessary to readjust the brake if cor-rect travel of the governor valves is maintained. Governor Plungers and Valves. The face of thegovernor plungers 38 will eventually become cut andworn by the passage of the steam, and when thiscondition exists the supply of steam to the wheel willnot be diminished when maximum speed is attained, andthe electromotive force will be built up, causing the elec-trode in the lamp
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