GB190628543A - Improvements in and relating to Photographic Change Boxes. - Google Patents

Abstract

28,543. Hilton, F., and Brown, A. Dec. 14. Change-boxes forloading and unloading in daylight comprise a holder or adapter which may alternatively form part of the camera, and an inner container comprising telescopic parts in which the front exposed plate is pushed from the pack by a rod, and changed to the back by hand. The inner case A, Figs. 3 and 4, has a front exposure aperture a<1>, and a rear aperture a<2> covered with flexible non-actinic material which is provided to enable the spring c<3> to press the plates forward when the outer telescopic cover B is withdrawn. The latter has a; flexible bag b<2>, and stop-ribs b<3>, and it may have a memorandum tablet b<4>, Fig. 2. The plates used have a non-actinic coating and distance-pieces, which can be formed by folding the backing over the front edge. of the plate. The container slides within the adapter from the end and is held therein by the flap c'. The adapter has also a hinged flap door c<2> at the back holding the spring c<3>. A separate plate with attached springs may, however, be substituted for this arrangement, or springs attached on the inner face of the case A. A push-rod c<4> is used to push the front exposed plate D into the case B after the latter has been withdrawn to expose the plate, and the plate is then transferred to the back of the case by band. An indicating-device F may be attached to the adapter C and actuated by the projections b<3> of the case B as successive plates are exposed.