Cine-film projection : a practical manual for users of all types of 16-mm. and narrow gauge film pro (1952)

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found on the projector spool-arms. 8-mm. and 16-mm. are exactly the same and spools in these gauges may be used on the same rewinder. But a different rewinder will be needed for 9.5-mm. size spools. A bi-film rewinder is one on which both 9.5-mm. and 16-mm. spools may be used. Splicers A Splicer is used for correctly joining together two pieces of film, and good ones are provided with an attachment for scrap- ing the emulsion from the film. The majority also include a part for cutting the film, either at an angle or straight across. Joins made at an angle are considerably stronger than transverse joins, and help to reduce the faint "plop" sometimes heard when the join passes through the soundhead. (The correct method of joining films is described in the chapter on Film Care.) As with other modern accessories, splicers are now made for use with any of the different film sizes or for a combination of sizes. A universal splicer is one on which the film-locating pins are so arranged that films of 8, 9.5 or 16-mm. may be used. Cables and Connectors Cables and plugs should always be clean and dry, and the in- sulation periodically examined and repaired. The mains cable should not consist of a length of 5-amp lighting flex; power cable should be used (Fig. 11). Cables should be coiled in such -*-r DIRECTION OF CURRENT The MALE HALF FEMALE HAlf Fig. 9 THE 10-AMP FLEX CONNECTOR 'male half" must always be on the dead side of an electrical circuit. a manner as to prevent them from twisting, otherwise they will eventually develop kinks and then probably split. Any joins in 33