Contact Board Associated with Herman Hollerith


This wooden board has six switches on it, and six metal nubs. The nubs and one end of each switch are screwed into the board. On the opposite side are contacts for electrical wires. Twelve nails in the board on top assure that one switch can only meet one nub. Holes at opposite ends of the board allow it to be attached to a table, with a groove in the back for wires.

Compare to switches on the Hollerith tabulating system with museum number MA.317982.05.

Date Made: ca 1900

Maker: Hollerith, Herman

Location: Currently not on view

Web Subject: Mathematics


See more items in: Medicine and Science: Mathematics, Computers & Business Machines, Tabulating Equipment


Exhibition Location:

Credit Line: Gift of the Estate of Herman Hollerith, Jr.

Data Source: National Museum of American History

Id Number: MA.335637Accession Number: 1977.0114Catalog Number: 335637

Object Name: contact board

Physical Description: rubber (overall material)wood (overall material)brass (overall material)Measurements: overall: 3.8 cm x 8.3 cm x 6 cm; 1 1/2 in x 3 9/32 in x 2 3/8 in


Record Id: nmah_694430

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