Kinematograph year book (1927)

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Equipment and Technique in 1926. 217 of the film guide gives every protection to the film as the emulsion never comes in contact with the mechanism. The metal shield for the automatic shutter, actuated by friction and placed in front of the gate, automatically cuts out the light immediately the machine stops running. Heat from the lamphouse cannot reach the mechanism owing to the intervention of an asbestos-lined firewall. Spool boxes are fireproof, and long firetraps prevent the flame entering the box. Any make of lamp can be supplied with the " Imperator," ranging from £8 to £40. The Ernemann lamp has a steel mirror which has proved very successful. Dependability and simplicity is the kejmote of this favourite machine, the absence in which of functionless working parts is one secret of its longevity in use. Consistent lubrication is ensured by the enclosure of the Maltese cross in a grease bath. In the latest model considerable improvement is noted in spool arms, both of which incorporate two springs by which magazines are firmly secured to their castings. The take-up arm is now practically an integral body of the mechanism, and is provided with an auxiliary bearing supporting the spindle of the take-up clutch, which greatly enhances its long-wearing qualities. The arm supporting the bracket of the outside shutter of the marking device has been lengthened, and now connects with the fillet of the main casting, and is so arranged that the arm rises and falls with the marking movement, giving greater stability to the shutter gearing. The automatic light cut-off is controlled by a centrifugal governor in flywheel, and its closure is instantaneous with the stoppage of the mechanism. The take-up is governed by an efficient sensitive friction clutch, and may be regulated to ensure adequate tension. The velvet-gate with the two spiral springs produces the famous " human finger " pressure on the film, the latter being supplied with adjusting screws to vary the pressure on the film. In the " Mirrolite " reflector arc special attention has been paid to the design of the carbon and mirror controls, and its consumption is claimed to be one-third of that necessary with the ordinary arc. HAHN-GOERZ. Although of comparatively recent introduction to this country, the Hahn-Goerz projector has proved by its performance to have fulfilled all the requirements of many exhibitors. Perhaps the best tribute to this projector is that it is a fitting complement to the Hahn-Goerz " Artisol " mirror arc that is well toward becoming a standard installation. Among the many interesting features of this projector is the manner in which the problem of lubrication has been solved by the establishment of only three oil points and the enclosing of all gearing and axles, which are run in oil baths. In consequence, wear on gear teeth and bearings is minimised, and the running is practically silent, a fact to which the system of worm-wheel gearing and the accuracy of every mechanical part contributes. The gearing is easily adjusted and is made of the best grade steel or a special oronze, and are standardised. The distinctive take-up device is claimed to be absolutely reliable in its action, slip being between a driving wheel and driver-disc, the rims of which are held in contact by a coiled tension spring. This fricticri clutch GAUMONT CHRONO, II! Ill III •1