Enlarging apparatus for use in a bright room

Claim 1

An enlarging and viewing apparatus for use in a light room, comprising a rigid light-tight housing, the following components in said housing, a light source, a transparency-holding insert means for holding a transparency to be projected in front of the light source, variable projection optics which is variable in focal length, the wall of said housing opposite said light source having an opening for the projection of the picture to be copied on a projection surface disposed in said opening and having means for mounting light-sensitive photographic paper on said projection surface, an image-viewing window in a wall of said housing normally arranged to said projection surface, a swinging mirror having an axis of rotation at one side of said housing whereby it may be positioned at an angle between said projection surface and said image-viewing window screen for projecting an image on said window for adjusting it and whereby it may be swung out of the path of light projected to said projection surface for exposing said photographic paper, focal length control means on said variable projection optics for continuously varying the size and format of the picture projected on said projection surface, said opening in the path of light rays being light-tightly sealed in front of said projection surface by means of a cover, said swinging mirror being constructed and arranged to be maintained in an inclined position, for the adjustment of the apparatus for viewing the transparency and for the determination of the format to be copied, said swinging mirror being constructed and arranged to be moved toward and contiguous to said image-viewing window into a position which covers it and seals it for the exposure of said photographic paper, said swinging mirror and said cover also being constructed and arranged to permit exposure of the photographic paper, control actuating devices for said apparatus being mounted upon a control wall of said housing, said control actuating devices being operable from outside said control wall, said cover has a hinge connected on one of said walls adjacent said outlet, and the axis of rotation of said swinging mirror is mounted at said inlet upon another of said walls.