De qué está hecho Tabuladora de Hollerith
An electromechanical machine for processing census data from punched cards.
- Punched card reading press — tiene como parte. Needles pass through the holes and close the circuit in mercury.
- Electromechanical dial counters — tiene como parte. Dials that count the pulses.
- Relé — tiene como parte. Relays controlled the sorting box.
- Tarjeta perforada — utiliza. The 1890 census data was encoded on punched cards.
- Electromagnetismo — utiliza. The counters click with electromagnets.
- Hierro fundido — está hecho de. The casing is cast iron.
- Cobre — está hecho de. The contacts are copper pins dipping into mercury.