Communications: electrical – Digital comparator systems
Patent
1975-09-25
1977-03-15
Nusbaum, Mark E.
Communications: electrical
Digital comparator systems
235 6111A, G06F 300
Patent
active
040127206
ABSTRACT:
A data entry system for providing a computer readable record of historical information, such as market survey information, relating to at least one common subject, such as a particular product, having a plurality of different possible attributes, such as price, store in which purchased, etc., with the attributes having a plurality of different selectable definitions, such as different store names, different price values, etc. The system comprises at least one electrical crosspoint matrix array with each of the crosspoints having an associated indicia corresponding to one of the selectable definitions and having bit state corresponding to the absence of the associated definition and a different bit state corresponding to the presence of the associated definition. Addressable temporary storage means, such as a random access memory, having a plurality of different bit addresses with a unique bit address being associated with each of the bits associated with the crosspoints is provided, with the temporary storage means being selectively connectable to each of the crosspoints for recording the state of the associated bit at the unique associated bit address therefor. An electrical contact probe is provided for selectively changing the state of the bit associated with a crosspoint by selective contact therewith. The temporary storage and the crosspoint matrix array are synchronously scanned for selectively connecting each of the crosspoints to its associated unique bit address to provide the state of the associated bit thereto at the time of the synchronous scan of the crosspoint so as to provide a bit value map of the crosspoint array in the temporary storage. The bit value map is selectively dumped from temporary storage to a permanent magnetic storage, such as a multichannel tape, the permanently stored map being computer readable for providing a computer readable historical information record relating to the subject. A plurality of such crosspoint matrix arrays may be time division multiplexed to provide a common permanent storage record thereof.
REFERENCES:
patent: 3346853 (1967-10-01), Koster et al.
patent: 3609695 (1971-09-01), Pirkle
patent: 3727190 (1973-04-01), Vogelman et al.
patent: 3839708 (1974-10-01), Bredesen et al.
patent: 3847345 (1974-11-01), Moldovan et al.
Call James
Robertson John
LandOfFree
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