We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
176
THE.
"Prestwich" Projector.
i
A " dog-movement " machine of good design, giving efficiency with little wear and tear to the films. The cam is si i placed that the prriod of movement bears a very small ratio to the period of rest, and a very brilliant picture, free from flicker, is the result. A very special feature is the masking
device. To obtain the adjustment of the film in the window or aperture, the film-actuating mechanism is mounted on a separate slide, and is caused to slide vertically on the main frame by a rack and pinion. This has a travel of one inch, which is equal to I J pictures, so that, no matter where the picture comes in the window or aperture, the whole adjustment is made by simply moving the lower handle shown in the illustration. This can be done while the machine is in motion. With this arrangement there is no need to shift the film on the sprocket, or to move the mask or lens, which remain in the correct optical centre, and the picture is always in the same position on the screen.
The film spools are held on the spindles by a novel spring clip which engages automatically by pushing the spools on the spindle. This is disengaged with a slight pressure of the finger when it is required to take the spool oft. The end of the film is attached to the drum in a more convenient way than hitherto.
The sprocket tollers are held by a spring, and are arranged to remain in the open position when so placed. The rollers do not press on the film, there being a small space between the rollers and the sprockets. The face of the film does not come in contact with any rubbing surface.
The whole is constructed of the finest gun metal and steel, and is of the best workmanship and finish possible; all the spindles are accurately turned and of ample length to reduce wear to a minimum.
The " PRESTWICH " OUTFIT consists of " No. 7" Projector with Objective, Two large
Spools, and Automatic Winding Attachment for long film or a series of films. Automatic Light Cut-off (Pneumatic).
Best Quality Russian Iron Lantern, Brass double Stage Front
Swivel Base and Polished Mahogany Baseboard with Flange'ior carrying Lantern Lens
for projecting Title Slides, etc. Lantern Objective.
THE OUTFIT complete as above £26 O O
Code Word—" BIOMBO.