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MANAGERS AND PROJECTIONISTS 877
the switching mechanism of bronze. All parts of the machine are interchangeable, and every machine is guaranteed indefinitely against structural defect, so that any fault due to defective material or workmanship will be replaced without charge.
OPERATING DIRECTIONS.— Each bearing support for the drum has one oil cup, the bearing for the gear two oil cups, and each motor bearing one oil cup. A few drops of the same oil you use on you projector (if you use good oil) in each of the bearings once a month, and a few drops on the threaded shaft and the roller chain once a month is sufficient.
To locate trouble in case the motor will not run, it is necessary to :
(A) See that the main line switch is closed.
(B) Test the fuses.
(C) Inspect for loose electrical connections in box F, Fig. 364.
(D) See that the projection room controlling switch is making proper contact.
(E) Open box F, Fig. 364, and see if the safety arm has thrown the switch to "open" position. If so, the spring has either become disconnected or is broken.
Collars C and D, Fig. 364 are adjustable. Moving them away from the travelling head causes the curtain to travel a greater distance, and moving them toward the travelling head causes the curtain to travel a shorter distance. For instance, if the curtain is not completely closed, start the machine and allow it to operate in the direction of closing the curtain. If it stops automatically when the curtain is not quite closed, the button which is then nearest the travelling head should be moved away from the travelling head, not more than one-sixteenth of an inch. Having made this adjustment, let the machine again open the curtains and close them. If it does not quite close this time, move the collar a trifle more. To cause the curtains to open farther, the same operation is necessary at the other end of the travelling head. When the curtains are open the button nearest the travelling head must be moved a bit further away, if it is desired to have the curtain open wider, or it must be moved toward the head if the curtains opens too much. One eighth of an inch movement of collars C-D represents an eight inch change in the travel of the curtain.
SLIPPING CLUTCH.— To locate the cause of the clutch slipping:
(A) Main line switch should be opened.