Card – picture – or sign exhibiting – Photographic transparency viewer – e.g. – x-ray viewer
Patent
1989-03-28
1989-08-15
Croyle, Carlton R.
Card, picture, or sign exhibiting
Photographic transparency viewer, e.g., x-ray viewer
40366, G02B 2702
Patent
active
048562157
ABSTRACT:
A device useful in sorting slides can be constructed so as to include a tray formed of a white polymer material and so as to include a plurality of slide holders pivotally mounted on the tray generally above the bottom of it so that they may be rotated between storage positions in which slides held by the holders are generally parallel to the bottom of the tray and adjacent to the bottom of the tray to a sorting position in which slides held by the holders are located at an angle to the bottom of the tray. Detents are provided for temporarily positioning the holders in the sorting positions. When they are held at an angle to the bottom of the tray slides held by the holders can be viewed as they are illuminated by ambient light. Because of the manner in which the slides are held they may be arranged in any desired manner by moving them to various position in the holders as they are illuminated.
REFERENCES:
patent: 479716 (1892-07-01), Miller
patent: 3410012 (1968-11-01), Kumei et al.
patent: 3508355 (1970-04-01), Hooper
patent: 3696538 (1972-10-01), Nast
Croyle Carlton R.
Walnoha Leonard P.
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