De que é feito hollerith tabulator
An electromechanical machine for processing census data from punched cards.
- Punched card reading press — tem como parte. Needles pass through the holes and close the circuit in mercury.
- Electromechanical dial counters — tem como parte. Dials that count the pulses.
- Relay — tem como parte. Relays controlled the sorting box.
- Punched card — utiliza. The 1890 census data was encoded on punched cards.
- Eletromagnetismo — utiliza. The counters click with electromagnets.
- Ferro fundido — é feito de. The casing is cast iron.
- Cobre — é feito de. The contacts are copper pins dipping into mercury.