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PCE
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DIFF Subgroup
G03B 21/44

Mechanisms transmitting motion to film-strip feed; Mechanical linking of shutter and intermittent feed

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Projectors or projection-type viewers; Accessories therefor > Details > Details specially adapted for motion-picture projection > Driving mechanisms > Mechanisms transmitting motion to film-strip feed; Mechanical linking of shutter and intermittent feed

CPC:

Projectors or projection-type viewers; Accessories therefor (devices for changing pictures G03B23/00) > Details > Details specially adapted for motion-picture projection (with film moving continuously through the gate G03B41/02) > Driving mechanisms > Mechanisms transmitting motion to film-strip feed; Mechanical linking of shutter and intermittent feed

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

Child Classifications

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  • G03B 21/46 affording adjustment for framing IPC+CPC Available in IPC and CPC
  • G03B 21/48 for altering frame speed; for regulating constancy of film speed IPC+CPC Available in IPC and CPC