Permanent Storage on Metallic Cards
Abstract
A description of one type of permanent storage memory unit using metallic cards. Interest has been created in this system because of high speed in operation, high work reliability, long service life, simplicity of preparation, small dimensions, and low cost. The working principle of such a unit is based on the phenomenon of electromagnetic induction. Material for the punched cards can be thin metallic copper, duralumin, or brass foil. Various dimensions for the cards are possible but for the sake of adapting them to other items of standard equipment for punching and sorting it was found expedient to make the dimensions those of a standard paper punched card with 45 columns and rectangular punches 3.2 x 6.35 mm. Construction, operation, and circuitry of such a memory unit is described in detail.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 20, 1967
- Accession Number
- AD0666487
Entities
People
- A. V. Petrov
- V. I. Vinogradov
Organizations
- Air Force Systems Command