Hollerith key punch, model 20, 1909-1932

Hollerith key punch, model 20 Hollerith key punch, model 20 Hollerith key punch, model 20 Hollerith key punch, model 20 Hollerith key punch, model 20

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Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

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License this image for commercial use at Science and Society Picture Library

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Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

Buy this image as a print 

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License this image for commercial use at Science and Society Picture Library

License

Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

Buy this image as a print 

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License this image for commercial use at Science and Society Picture Library

License

Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

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Hollerith key punch, model 20
Science Museum Group
© The Board of Trustees of the Science Museum

Hollerith key punch, model 20
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Hollerith key punch, model 20
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Hollerith key punch, model 20
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Hollerith key punch, model 20
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Hollerith key punch, model 20, made by the British Tabulating Machine Company Limited, Letchworth, Hertfordshire, England, 1909-1932.

Key punches were used for punching holes in stiff paper cards. The pattern of the holes recorded data, which could then be read by unit records equipment, early data processing machines. Punched cards were later adapted for use with some of the earliest computers. This key punch was used with 45 column cards.

Details

Category:
Computing & Data Processing
Object Number:
1932-331
Materials:
metal (unknown)
Measurements:
overall: 155 mm x 140 mm x 470 mm,
type:
punch (cutting tool)
credit:
Donated by Fujitsu Siemens Computers Ltd.