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MANAGERS AND PROJECTIONISTS 849
Afterward wipe dry, polish, using only soft, clean cloth, chamois skin or soft tissue paper.
Having cleaned the converging lens, you will find, on the front side of its holder, or retaining ring, three clips which serve to hold the lens in place. The one at the top is movable. Turn it so that you can slip the lens into place, after which turn the upper clip into position to retain the lens.
It is recommended that the flat side of the lens be placed7 next the light source.
Next, by exactly the same process, place the reflector in position, having first cleaned its surface, of course.
WARNING. — If the solution of household ammonia be used, be very careful not to permit any of it to reach the back of the mirror, else there is danger that the reflecting surface will be seriously injured.
In placing the reflector in position in its retaining ring, AL 69, Fig. 315J, be sure that the upper latch, or clip is turned into such position that the mirror may be slipped into place without exerting force. Force is unnecessary, and may chip or crack the reflector. When the reflector is in position and properly seated in the ring, you will, of course, turn the upper latch, or clip into position so that it will hold the lens in place.
ADJUSTING THE LAMP.— The saddle, Al-53, Fig. 315J carrying the reflector assembly, is clamped to the lamp bed track rod by means of thumb screw, AL-54, Fig. 315J. It is necessary to place the reflector into proper position, as to its distance from the converging lens, and to do this, first loosen thumb screw AL-54 and move the entire reflector assembly with saddle either forward and backward until the small pointer on the forward boss is brought into alignment with the front pointer that is cast directly into the casting which forms the sub-carriage for the lamp. These pointers are illustrated in figure 315J.
Now by means of adjusting handle No. AL-15 shown in figure 315J, adjust the lamp bed to its center travel position by aligning the rear pointer on the lamp bed lug with the rear pointer also on the rectangular sub-base casting. This will have the effect of bringing the lamp bed to its correct position for trimming and the reflector saddle exactly at the center point of travel between the positive and negative carbon slide saddles designated as No. AL-37 in figure 315J.
This will have the effect of bringing the reflector into correct position, whereupon tighten up thumb screw, AL-54, tightly for this is its permanent location.