Combined mandrel and hub for large industrial camera - coupled by spur through slot, has axial alignment of different size film spools

摘要

The cylindrical elongated mandrel (12), has short shafts (20) attached to its ends. The shafts rotationally fix it inside the camera. The mandrel has a leading slot between its ends along the optical axis. A spur (28) is held elastically in the slot, and projects beyond the outer surface of the mandrel. - A hollow elongated film spool hub (11) has a cylindrical body which slides over the mandrel. The hub has a rectangular slot (16), located centrally between the ends (14,15). The spur thus couples the mandrel to the hub via the slot.(2/4)