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One great drawback in the machine of the old t.vpe has been that the lens holders were flimsy and not
depended upon for trueness and rigidit\-. This designing the Simplex. A glance at Illustration
The film protector and projecting lens holder No. 650 are made of a very suitable metal, and are securely held in the mechanism by set screw No. 173. The ordinary projection lens is fitted into the adaptor Xo. 1733^, which is securely clamped and held parallel with the aperture plate by screw No. 175.
When a No. 1 Gundlach or our regular stock lens is used, adaptor 173^^ is removed, and the lens tube inserted into adaptor 172;/2 as illustrated on Plate F.
When No. 2 Gundlach lens is used, as shown on Plate F-3, the rear end cell must be threaded so that the connectors, or adaptors, as they are sometimes called, can be secured to the lens to hold it in the projecting lens holder.
The connector 175J-2 is for 5j/2" No. 2 Gundlach lens, and is fitted into projecting lens holder by removing both adaptors and inserting small end. The extension collars. 1. 2. 3, 4 focus, the idea being to extend the lens further awav
very important part of the projector F will sustantiate this statement.
was not overlooked
to be when
172'/2A
FILM_ PROTECTOR COMPLETE W F
rH TWO ADAPTERS-650
and 5, are for lenses of longer from the film.
An unique and novel arrangement for focusing, which, being located on the left
end side of the ma
F2
The Stereo lens holder, as illustrated on Plate F-2, is made of coarse grained cast iron, carefully machined, all bearings drilled and reamed. A single glass stereo lens is furnished with a Simplex projector, and is clamped into a special holder, which, in turn, is securely held by a ball and socket joint No. 672. The adjustments are simple and their easy accessibility is almost self-explanatory, as the ball and socket joint and wing screws, 225 and 228, permit a lateral or horizontal movement of any part of the lens or holder.
The method of exact focusing is similar to that of the projecting lens, and is accomplished by turning the knurled screw, 182, which is to be found next to the projecting lens focusing knob.
The superiority of the lens holder and the focusing arrangement of the Simplex projector are such that the lenses are always held absolutely parallel with the aperture plate. This, together with the fact that we eliminate the chances of the threads becoming crossed and thus throwing the lens out of parallel, enables the user of a Simplex to obtain the full benefit of the aperture opening.
chine, is more convenient for the operator, is shown on Plate F-1. The rack 180 is fastened to the lens holder and film protector 650 by a set screw which travels in a milled groove on the centre frame.
Figure 653, focusing pinion and shaft, are cut from one piece
of tool steel, thereby obviating the possibility of the gear becoming loose upon the shaft.
The focusing pinion adjust screw No. 182 has a knurled head so that it can easily be gripped between the thumb and index finger for exact focusing. This is an exclusive feature, to be found only on the Simplex machine.
F1
EXTENSION COLLARS
F3
IT IS ALL IN THE MAKING
A PERFECT PROJECTOR GIVES PERFECT RESULTS
pR"ii:r;(:sioM maca kmc company
317 EAST 34th STREET NEW YORK CITY