Abstract A data processing card is provided with one or more apertures each with a window rotatably mounted with respect thereto. The window may be of polarizing material or bear an indicating arrow or the like. Information is set into the card by rotating each window to selected angle conveniently done with a pencil applied to a tab attached to the window and registerable with indexing marks on the card. Two or more cards can be superimposed one upon the other with their apertures aligned. By illuminating the stack of cards from the rear, the information on the several cards can be examined from the front for matching and mismatching of information. If a bit of information on one card corresponds with the bit of information on the other card in a corresponding window, their polarizing filters will be oriented in the same manner and light will pass. If the information bits are different, the filters will be differently oriented and light will be blocked.
A data processing card, comprising a. a wall formed with at least one aperture therethrough, b. a window rotatably mounted to said wall across each aperture, c. said window being formed of light polarizing material, d. first reference means on said window for indicating the angular position thereof, and, e. second reference means on said wall angularly spaced about said aperture.
Claim 2
Dependent Claim
61 words
A data processing card, comprising a. a wall formed with at least one aperture therethrough, b. a window rotatably mounted to said wall across each aperture, c. said window being formed of light polarizing material, d. first reference means on said window for indicating the angular position thereof, and, e. second reference means on said wall angularly spaced about said aperture.
Claim 3
Dependent Claim
103 words
A data processing card according to claim 1 wherein said wall includes a pair of superimposed front and rear panels, said rear panel being formed with at least one circular aperture therein, a flat C-shaped holder mounted to the inner face of said rear panel with the C-shaped portion concentric with said aperture, said window being formed with a circular portion mounted within said C-shaped portion and a radial tab extending outwardly therefrom, said front panel being formed with a circular aperture in registration with said window and said rear panel aperture and an arcuate opening in communication therewith to expose said tab.
Claim 4
Dependent Claim
17 words
A data processing card according to claim 2 wherein said tab is formed with an indent therein.
Claim 5
Dependent Claim
40 words
A data processing card according to claim 1 including an information bearing sheet detachably mounted to the outer face of said front panel and formed with apertures corresponding in size, shape and number with the apertures in said front panel.
Claim 6
Dependent Claim
49 words
A data processing card according to claim 1 wherein said wall is formed with a plurality of apertures arranged in at least two parallel rows, said apertures being evenly spaced and distributed whereby the apertures of similar cards will be in registration when superimposed in either of two positions.