Details

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Projectors or projection-type viewers; Accessories therefor > Details

CPC:

Projectors or projection-type viewers; Accessories therefor (devices for changing pictures G03B23/00) > Details

Of 12 combined children, 9 exist in both systems.

3 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

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G03B 21/142 CPC only CPC only
G03B 21/145 CPC only CPC only
G03B 21/147 CPC only CPC only
G03B 21/16 Cooling; Preventing overheating IPC+CPC Available in IPC and CPC
G03B 21/18 Fire preventing or extinguishing IPC+CPC Available in IPC and CPC
G03B 21/20 Lamp housings +8 CPC IPC+CPC Available in IPC and CPC
G03B 21/22 Soundproof bodies IPC+CPC Available in IPC and CPC
G03B 21/26 Projecting separately subsidiary matter simultaneously with main image IPC+CPC Available in IPC and CPC
G03B 21/28 Reflectors in projection beam IPC+CPC Available in IPC and CPC
G03B 21/30 adapted to collapse or fold, e.g. for portability IPC+CPC Available in IPC and CPC
G03B 21/32 Details specially adapted for motion-picture projection (with film moving continuously through the gate G03B41/02) +1 CPC IPC+CPC Available in IPC and CPC
G03B 21/53 Means for automatic focusing, e.g. to compensate thermal effects since 1990 IPC+CPC Available in IPC and CPC