Patent GB-106856-A (GB)
IPC: G03B17/26
Abstract: 106,856. Vickers, J. W. June 5, 1916. Kinematograph apparatus.-A light-tight casing for containing a kinematograph film and permitting loading or unloading of a camera in daylight is constructed of paper, card, sheet metal, opaque or coloured celluloid, &c. and has a central tubular support for the film, which is carried by the bottom of the casing and extends to or close to the top of the casing. As shown in Fig. 1, the bottom A<1 >of the casing is formed with a tubular support or pillar B, and the top has a similar tubular pillar C<2> and walls C<1> which slide over the corresponding parts of the bottom, a strip of adhesive material K preferably connecting the two parts. A loosely-fitting sleeve surrounds the pillar B. Slots in the walls of the casing are provided for the passage of the film, and the edges of the slots are preferably weakened and faced with velvet. The film, when loaded, is passed through the slots and covered by a light-tight paper seal, which is removed before the film is used. In a modification, the top of the casing consists of a disk, with or without a central hole, which rests upon, or is housed within, the walls of the bottom of the casing, a slip of card, in the latter case, lining the walls of the casing and supporting the edges of the top. Various ways of applying adhesive material to render the casing light-tight are described. Fig. 5 shows a construction of casing which may be used with a bobbin in the take-up box of a camera. The bottom O<1> of the casing has an aperture O<2> through which the flange P<3> of a bobbin-carrier P is passed, semicircular key-pieces O<3> securing the carrier P in such manner that it can rotate with the spindle X. The casing, when loaded with an unexposed film, contains a bobbin substitute Q<1>, which is held by the carrier P and may be further supported by a flange Q<4> secured within it, being surrounded by a loose sleeve Q<2>. When this construction of casing is to be used in the take-up box, the bobbin substitute is replaced by the usual bobbin, the film being passed through one of a number of slots P<1> in the carrier P and being secured to the bobbin. The two parts of the casing are connected by adhesive strips, which are permanently secured to the bottom, before the casing is withdrawn from the take-up box, and after withdrawal, the hole in the carrier P is sealed, the bobbin being prevented by the carrier from dropping within the casing before the sealing is effected and so fogging the film. The carrier P may be modified by omitting the flange P<2> and by enlarging the neck P<2> and providing it with an internally-directed flange bearing on the spindle X. The carrier may be secured non-rotatably to the casing and consists of a flange secured to the bottom; a similar flange may be provided on the top of the casing. Other means for holding the bobbin until sealing is effected, such as a plate having spikes which are pushed through the top of the casing into the bobbin, may be provided. The construction shown in Fig. 5 admits of the reverse travel of the film known as " reverse exposure," for which purpose the feed-box becomes a take-up box, the bobbin substitute of the carton therein, which has been emptied previously. being removed and replaced by an ordinary bobbin.