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2l6
The Kinematograph Year Book.
" America " — the first stereoscopic or natural vision full-length drama — commenced on December 15, and a public presentation is announced to take place in New York early this year.
PROJECTORS AND SAFE PROJECTION.
Proposals to ensure safety in projection by the institution of a cooling device on the projector have been referred to, and the year has witnessed the production of several methods by which the heat of the beam of light may be tempered before it reaches the film aperture. In some cases these devices are an integral part of the projector, in others apparatus has been evolved adaptable to any make of machine.
THE A.E.G.
An example of the former method appears in the latest model A.E.G. projector, for which Theatre Equipment has the agency, in which the protection of the gate from the extra heat generated by mirror arcs and the consequent elimination of fire risks is one of its three outstanding features. The rotary shutter is situated behind the gate aperture and doubles the function of an ordinary flicker shutter and a suction ventilating fan. It is claimed that the heat is reduced by 50 per cent., because the gate is subjected to two cooling devices ; one being the wind vane action of the shutter, and* the other the interception of the light beam during the cover period. The whole is encased in a ball shaped housing which increases the cooling effect.
Other distinctive features are the self-acting oil mechanism which ensures the even and automatic lubrication of all essential parts. Steadiness in projection is secured by the exact working of the intermittent movement and the introduction of a spring-roller device that adapts itself to the breadth of the film, together with a film track of exceptional length. These factors make for perfect projection results, and reduces risk of film damage to the minimum.
THE ERNEMANN "IMPERATOR."
On the new model Krupp-Ernemann " Imperator," a blowing attachment is supplied, which also very largely eliminates the fire risk. This takes the form of a centrifugal fan cooling blower, fitted above the gate and attached to the upper spool box. The fitment is neat and unobtrusive, motive power being supplied by a built-in small electric motor which can be directly connected with the lighting main. This is one of the most interesting accessories of Walturdaw's new machine, the performance of which enhances the already widespread repute of former Ernemann models. Every essential to first-class projection is to be found in the " Imperator," which while being of the simplest possible operation, combines strong and workmanlike construction with the highest mechanical and optical efficiency. The Maltese cross runs in an oil bath, and all cogs and bevel wheels are completely enclosed, the entire mechanism being automatically lubricated from centrally arranged oil holes. All parts, especially those subjected to wear, are standardised. The optical axis is fixed. Masking is easy and may be performed during running without interfering with the film. The construction
HALL & DIXON, Ltd.
FOR SEATING, CARPETS, CURTAINS
Estimates Free. 19. GARRICK STREET, LONDON. Regent 1930