Rotary type information retrieving machine

Details Rotary type information retrieving machine Rotary type information retrieving machine

1978-09-06

1980-12-02

Pitrelli, John F.

Card, picture, or sign exhibiting

Register, or file

Rotatable carrier for file

40466, 40475, 40510, 40532, B42F 1734

Patent

active

042363349

ABSTRACT:
A rotary type index in which a multiplicity of information containing cards are arranged around a cylindrical drum and the drum is rotated to display information-containing surfaces of the cards in a viewing window is provided with a mechanism for causing a plurality of the information cards to be brought into position with a single selection key. This is as distinguished from the conventional drum type machine in which the number of selection switches equals the number of information cards.

REFERENCES:
patent: 667865 (1901-02-01), Brown
patent: 1477887 (1923-12-01), McDonald
patent: 1914597 (1933-06-01), Dobrowsky
patent: 1978556 (1934-10-01), Sturner
patent: 3279108 (1966-10-01), Capellari
patent: 3490160 (1970-01-01), Freidhoff et al.
patent: 4060919 (1977-12-01), Sasaki

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