Details specially adapted for motion-picture projection (with film moving continuously through the gate G03B41/02)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Details specially adapted for motion-picture projection

CPC: Details specially adapted for motion-picture projection (with film moving continuously through the gate G03B41/02)

Full Title

Full titles differ between systems:

IPC:

Projectors or projection-type viewers; Accessories therefor > Details > Details specially adapted for motion-picture projection

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)

Of 7 combined children, 6 exist in both systems.

1 codes are CPC-only extensions.

Child Classifications

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G03B 21/321 +3 CPC CPC only CPC only
G03B 21/34 Change-over arrangements IPC+CPC Available in IPC and CPC
G03B 21/38 Prolonged exhibition of single frame IPC+CPC Available in IPC and CPC
G03B 21/40 Eliminating or reducing effect of flicker IPC+CPC Available in IPC and CPC
G03B 21/42 Preventing damage to film due to abnormal operation of projector IPC+CPC Available in IPC and CPC
G03B 21/43 Driving mechanisms IPC+CPC Available in IPC and CPC
G03B 21/50 Control devices operated by the film strip during the run IPC+CPC Available in IPC and CPC