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DE406641C
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Fire protection device on film drums
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DE367584C
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Demonstration device for series pictures with optical compensation of the picture migration
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DE348309C
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Method for stretching projection screens onto the frame
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DE367469C
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Cinematograph with optical compensation for image migration
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DE358995C
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Cabinet housing for projection devices
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DE400283C
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Image window for the optical compensation of image migration in cinematographs
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DE350846C
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Cinematograph for, through projection
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DE359018C
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Standstill device for cinematographs
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DE326416C
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Device for adjusting the coals of arc lamps
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DE331216C
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Demonstration apparatus for series pictures
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DE327072C
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Recording device for series images
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DE350848C
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Device for exchanging the picture book for a ground glass in recording cinematographs
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DE348527C
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Cabinet for cinematograph demonstrations
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DE348424C
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Process for producing projection screens for demonstrations in lighted rooms
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DE327068C
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Device for step-by-step switching of picture tapes
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DE327179C
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Device for amplifying or transmitting the effects of electrical surges occurring in rapid succession
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DE328086C
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Electric winding device for clocks
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DE358663C
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Demonstration cinema with automatic rewinding device
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DE367998C
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Demonstration cinema with an endless belt
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DE333655C
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Device to facilitate the insertion of the picture book in cinematographs
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