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Description: | hp 9160A MARKED CARD READER HEWLETT-PACKARD SERIAL NUMBER 0978 A 00722 (brand model and serial number on the back of the machine). MANU Hewlett-Packard. circa 1970 Loveland, Colorado, The United States of America. DES after SHOCKLEY,William,Bradford. 1947 Bell Telephone Laboratories, New Jersey, The United States of America. This is a Hewlett-Packard 9160A optical card reader for reading punched cards or cards marked with a soft 2B pencil. As the card is fed through the machine it is illuminated by a thin line filament lamp. As a hole or a pencil mark passes below the strip of light the amount light reflected from the surface of the paper drops. The drop in light levels across the sheet of paper is registered by a series of 8 light-sensitive, photosensitive, diodes. The drops in voltage are then converted by the electronics into machine code for programming the calculator's processor. | License: | http://www.hmag.gla.ac.uk/spirit/rights/ | Publisher: | Hunterian Museum and Art Gallery, University of Glasgow | Rights holder: | Hunterian Museum and Art Gallery, University of Glasgow | Subjects: | SCIENTIFIC COLLECTION : | Source: | Hunterian Museum | Creator: | Hunterian Museum and Art Gallery, University of Glasgow | Identifier: | http://www.huntsearch.gla.ac.uk/cgi-bin/... | Language: | en-GB | Go to resource |
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