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Author
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Topic: Odd Screen for 1929
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Jim Cassedy
Phenomenal Film Handler
Posts: 1661
From: San Francisco, CA
Registered: Dec 2006
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posted 01-25-2015 10:53 AM
I believe that Paramount Publix either owned or had controlling interest in the Maganascope process, and they were installing it in many of their "A-List" theatres in large cities built in the 1929-1930 time period.
The screen was equipped with both horizontal & vertical maskings: (Sorry I can't make this larger, but original exceeds the size limit)
The masking changes were made by (union!) stagehands:
In addition to a large screen and masking system, a 'proper' installation also used a 3rd projector.
According to old tech documents, Simplex built a special "72degree" high speed intermittent movement for the Magnascope process:
To get the larger picture, the "Magnascope Projector" was equipped with a lens that was half the focal length of the theatre's 'normal' projection lens, thus giving an image that was almost twice the size:
The information above came from an article in a 1929 trade journal and was written by the head of the Paramount Publix projection department.
The same article was also published in a 1929 issue of "International Projectionist", which, I think, you can find online someplace.
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Jim Cassedy
Phenomenal Film Handler
Posts: 1661
From: San Francisco, CA
Registered: Dec 2006
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posted 01-25-2015 05:30 PM
Leo- The earliest movable masking system I'm aware of was the "Vallen Sound Mask" which came out in 1928. It only changed the masking on the left side of the screen, which was necessary when projecting "Movietone Aperture" prints, to eliminate the black bar you'd otherwise have on the left edge of the image. I'm not sure these were "upgradable" when the Academy aperture arrived on scene in 1930
1929 Advertisement:
Old ads & info I have on file show it was available in both manual and motor driven models. Interestingly, tech info I found in one old theater manual sez that the masking motor only ran in one direction, leading me to believe there must have been an electrically operated reversing gear as part of the driving mechanism.
In researching my earlier reply, it seems that most Magnascope installations included something called a "Vocalite Sound Screen":
Don't know much about "vocalite" screens, other than that they were "porous, but not perforated" . . however that worked
(As in interesting aside, I grew up in Roosevelt NY, but moved away in the early 1960's, when I was very young, so I have no idea if the "Beaded Screen Corporaton was still 'in town' back then)
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