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HOME MOVIES
Published in Hollywood JUKE 1944
• Fig. I — Showing method of mounting 16mm. projector mechanism on base of Univex projector for purpose of making 8mm. optical reduction prints of 14mm. films.
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HE eight millimeter fraternity of movie makers often see 16mm. pictures they would like to have in 8mm. A club brother will shoot a particularly interesting subject in sixteen that the "eighter" wants, or an 8mm. club frequently wishes to acquire a i6mm. picture reduced to 8mm. for their library. There have been numerous requests for prints on 8mm. width of prize-winning films shot on sixteen. Such reduction prints can be made by the amateur by using two projectors coupled together as illustrated in photos on this page.
These pictures show an 8mm.1 6mm. reduction printer with which I make optical reductions of i6mm. films to 8mm. I rigged the outfit up myself, using an old Keystone i6mm. projector, a Univex 8mm. projector, an electric fan motor and a few miscellaneous parts. Threading the i6mm. film to be copied in the i6mm. projector, it is projected through a special lens assembly onto raw 8mm. film stock traveling simultaneously through the 8mm. projector.
The 1 6mm. unit is an old model C Keystone projector. The 8mm. unit
811. PRINTS FROM 16MM. FILMS
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consists of the base and film transporting mechanism of a Univex model PU-8 projector. Base of the i6mm. projector has been removed and the mechanism and lamp house mounted upon the base of the Univex from which the lamphouse has been removed, as may be seen in Fig. i.
It was necessary to drive the two projectors by one motor in order to insure uniform speed of both. The method by which this was done is shown in Figs. 2 and 3. The regular motors were removed from both projectors. The mechanism of the projectors were then coupled together by means of a shaft and two sets of gears. Suitable gears
for the purpose were found in two 25c hand drills purchased in a dime store. The large ring gears were fastened to the main drive shaft of the projectors as shown in Fig. 3. The pinion gears were mounted on a shaft so that its turning would move mechanism of both projectors at the same time and at the same speed.
The motor driving this shaft is an old electric fan motor. It runs at constant speed of 1750 r.p.m. and is fairly quiet in operation. Power is transmitted to the gear shaft by means of a spring projector belt and pulleys. The pulleys used were not specially chosen for any *Continued on Page 244
• Fig. 3 — Power is transmitted to drive shaft by spring projector bejt and grooved pulleys. An ordinary 10 watt 110 volt lamp serves as printing light, shown here with housing removed.
• Fig. 2 — Both projector mechanisms are coupled together and driven by a single motor. Gears are, from dime-store hand drills. An adjustment made in 8mm. movement equalized frame speed.
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