Novel Piano Card Stamping Machine
Sample pages
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Describes a duplex head for a piano card stamper that combines two standard heads side by side, with paired keys linked by levers so that when a key punches a hole in one card, its mate leaves the corresponding position unpunched in the other. The pair of cards cut together has reversed hole patterns, intended for elaborate Jacquard fabrics with a suitable harness tie-up. The article explains the 16-key double head (32 punches), the key pairing schemes, peg-hole punches, and a worked comparison of hole positions on two cards, with two figures.
- Type
- Article
- Date
- November 1903
- Language
- English
- Pages
- 3
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From Ralph Griswold's Digital Archive, delivered by the University of Arizona.
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