The Nation's Schools, Količina 35Michael Vincent O'Shea McGraw Hill, 1945 |
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Zadetki 1–3 od 47
Stran 94
... projector requiring focusing , framing and other adjustments ... to the simple matter of wheeling in a single self - contained cabinet unit , plugging in a single electric cord and push- ing the starting button in an undarkened room ...
... projector requiring focusing , framing and other adjustments ... to the simple matter of wheeling in a single self - contained cabinet unit , plugging in a single electric cord and push- ing the starting button in an undarkened room ...
Stran 95
... Projector Makes Darkened Rooms Unnecessary The new Sono- Vision 16 mm . mo- tion picture projector is a self - contained unit that eliminates the necessity of dark- ened rooms . It con- tains all operating parts , projector , am ...
... Projector Makes Darkened Rooms Unnecessary The new Sono- Vision 16 mm . mo- tion picture projector is a self - contained unit that eliminates the necessity of dark- ened rooms . It con- tains all operating parts , projector , am ...
Stran 79
... Projector will include other important advances in projector design , such as even - tension take - up ; coated lenses ; simplified film path for easy threading ; amplifier with inverse feedback for true sound ; rewind without changing ...
... Projector will include other important advances in projector design , such as even - tension take - up ; coated lenses ; simplified film path for easy threading ; amplifier with inverse feedback for true sound ; rewind without changing ...
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