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MANAGERS AND PROJECTIONISTS
629
are at A, Fig. 234, which figure shows the condenser holder tipped down to get at the lenses. . When tipped back up it is locked into place by handle B. C, Fig. 234, is the screw by means of which the distance between the collector and converging, lenses is altered.
INSTRUCTIONS FOR CARE AND ADJUSTMENT OF POWER'S PROJECTOR MECHANISMS.— While at first glance these instructions may seem complicated, they are in fact very simple and quite easily applied. In what follows it is intended to provide all necessary instruction for anything the projectionist may be called upon to do in connection with Power's projector mechanisms and speed controls and we have tried to make the instructions so plain that even the uninitiated may follow them without much trouble.
The Power's mechanism are of the "open" type, which means that there is no inclosing casing. The projector may, by a very simple arrangement, be set at varying heights from the floor. It may be tilted to any angle within the limits of practical projection, either up or down.
In referring to these instructions the numbers indicate the illustration in which they occur and the particular part in the illustration, thus : 659, P. 2, indicates the part numbered 659 in plate 2, which in this case is the intermittent sprocket idler roller bracket.
INSTRUCTION NO. 1— REMOVING MAIN DRIVING GEAR AND SHAFT. — To remove main driving gear 630, P-4, and its shaft 631, P-4 and P-7: First remove crank 632, P-5, and the taper pin 789, P-2, which engages the slot in the hub of the crank. The taper pin 789, P-2, should be driven out from its small end. Having removed the pin, the shaft and gear may be withdrawn, and if desired the gear may be