4. Optics: image projectors
  5. Selective projection on distant or cabinet screen

Richard H. Koester

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Backlash free lens focusing apparatus

Optics: image projectors – Selective projection on distant or cabinet screen
Patent

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Filmstrip cartridge with film lock

Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent

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Filmstrip projector

Optics: image projectors – Selective projection on distant or cabinet screen
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Manual film retrieval

Advancing material of indeterminate length – By intermittent material-mover – Manual material-mover
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Profile ID: LFUS-PAI-P-695313

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