Cambridge Consultants of Bar Hill

Alan K McCombie

Stephen Temple

A rolling loop camera has a rotor which is arranged to clamp successive frames of the film against the surface of a fiber optic device. The rotor comprises a number of clamping devices with gaps between them, which devices roll over the film on the said surface. The gaps between the clamping devices receive the film which has been formed into a loop by supply means and the movement of the rotor causes the loop to roll across the said surface, thus placing the next frame on the surface for exposure. The film between the supply means and the loop is essentially supported by only the resilience of the film, and thus sliding of the film along a stationary surface while the loop is being formed is avoided. Each clamping device comprises a group of rollers and may include a belt supported by the rollers. As the rotor is operated, the clamping devices move around an endless path which in one embodiment is circular and in another embodiment is oval. A track defining the path is provided, and the clamping devices are maintained in engagement with the track by a drive member which causes the devices to roll along the track, thereby causing rotation of the rotor. The invention is applicable also to film projectors, in which case locator means is preferably provided for ensuring correct registration of the film frames in the device.

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Cambridge, United Kingdom

Alan K McCombie