Richardson's handbook of projection (1927)

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MANAGERS AND PROJECTIONISTS 775 INSTRUCTION NO. 40.— Upper sprocket shaft 450P, P. 1 and 3, and gear 451P, P. 2 and 3, may be removed by following Instruction No. 39 and then removing collar 453, P. 1, by loosening set screws (two of them) in its hub, afterward pulling shaft and gear out. INSTRUCTION NO. 41.— To remove gear HOP, P. 2, drive out the taper pin in its hub and raise the gear off by revolving it until it disengages from the teeth of 451P, P. 2 and 3. INSTRUCTION NO. 42.— To remove shaft 10UP, P. 2 and 3, remove screw in top of mechanism which engages main supporting spring 217P, P. 1, then remove nuts 223P, P. 3, and take out the two top screws holding mechanism case to the top of mechanism, which will allow the whole top of the mechanism to be taken off. Next release screw 854P, P. 2, and upper and lower screws 868P, P. 2. Now follow Instruction No. 12, look into the oil well and see the bevel gear on lower end of shaft, attached thereto by a taper pin, remembering that the file mark is at the large end of the pin. Drive this pin out. Next loosen two set screws in collar resting on part 203P, P. 2, and 215P, P. 2, whereupon shaft 100P, P. 2, may be lifted out upward. INSTRUCTION NO. 43— The mechanism is held to the lower magazine by four screws, the heads of which are seen by looking underneath the edge of the casting in the top of the lower magazine. Remove these four screws and you may lift the whole mechanism away. INSTRUCTION NO. 44.— The framing of the carriage is accomplished by means of a segment of a gear and pinion attached to the side of the base of the mechanism. Should anything at any time go wrong with this mechanism you can get at it by removing the machine from the base( whereupon its method of disassembling is self-evident The framing mechanism under the base operates a vertical screw 247P, P. 4, which engages with a phosphor bronze nut attached to the center of the framing carriage. INSTRUCTION NO. 45.— The weight of the framing carriage is carried by a vertical spring 217P, P. 1, and if there is a tendency for the carriage to work down proceed as follows : Open the motor compartment door, and looking up at the bottom of the mechanism you will see a half round arrangement with a cap and three screws ; this is open at one side. Looking in you will see a small nut which has a right-hand thread. By tightening this nut slightly the ten