Kinematograph year book (1939)

286 The Kinematograph Year Book. The fundamental principles of the projectors remain the same, but several new features have been added to achieve the super proj ectors' efficiency for which the name of Kamm stands. A new high intensity arc, which has an extremely high all-round efficiency, has now been produced, at a very reasonable cost, which will interest both the small hall and large hall exhibitors. Kaplan Projector. — This year's development in the Kaplan projector — the widely used American machine for which Jack Roe has the sole British agency — consists in the alteration of the stand to the latest pedestal type. Advantages of this stand, apart from its enhanced appearance, are the more rigid support afforded to weighty modern mechanisms and arcs, and the enclosure yet easy accessibility of all cables, which run from a central terminal box inside the stand. Installation is facilitated both in regard to wiring, and in the centring of the picture on the screen, horizontal and vertical adjustments being provided. The mechanism itself is of a type that has been well tried over many years, but which now includes such refinements as centralised lubrication, a rear shutter, and a rigidly supported yet easily removable gate or film trap, which is of the parallel opening type. Heat protection to the gate is provided not only by the rear shutter, but by a substantial heat shield scientifically cooled. The micrometer focusing mount will suit most types of lenses. Not the least important feature of the Kaplan is that it is of the type for which most modern sound systems were originally designed ; adaptation is, therefore simple and efficient. The rock-steady projection invariably assured by this machine is a testimony to the accuracy of Kaplan Sure-fit parts, which are finding an everincreasing market ; they are exclusively used by two of our leading circuits for all their projectors of the Kaplan type. All parts are supplied in sealed cartons and can be fitted without any tools other than a screw-driver. The standard illuminant for the Kaplan projector is the Ashcraft arc, for which Jack Roe is also exclusive concessionnaire. ROSS. — The sound engineering and scientific principles which characterise all previous Ross projectors are employed in the new Type G.C. projector which Pathe Equipment is handling. The following special features of this new equipment should be noticed : — Projector bearings are of the " Oilite " self-lubricating silent type ; which require oiling only once monthly. For racking, latitude for a full frame adjustment is provided by means of an exclusively designed revolving cross movement unique for its vibrationfree and smooth operation ; the shutter is a rear type guard-protected model incorporating an ingenious device for fine adjustment when in operation. Both top and bottom sprockets are the long service type and interchangeable. Intermittent sprocket is hardened and reversible. The gate is of the adjustable sensitive-pressure type and can be instantly removed with a minimum of effort for cleaning purposes. It incorporates a light-proof shield for operator's protection. A pilot light is attached in the vicinity for any voltage and facilities threading. An attractive feature is the increased diameter to 18 in. of the spool boxes, which accommodate 15 in. spools holding maximum length of film allowable. Top arms are adjustable and in effect restore the path of film to perpendicular on any angle of projection. Bottom arms incorporate silent chain-driven take-up with sensitive self-adjusting clutch movement. The stand is a super rigid pedestal type with wide angle tilting range and rectangular base, embracing four-point screw adjustment. A feature of the stand is that it has been so designed that vibration during projection is eliminated. The complete unit is specially designed for interchangeability of sound heads of standard systems and types, the method of transmission being universal.