Wheatstone's Electrical Counter, 1858
- Made:
- 1858
- patentee:
- CHARLES WHEATSTONE
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Wheatstone's Electrical Counter, 1858
This instrument, patented by Sir C. Wheatstone in 1858, consists of two dials over which pointers are moved by gearing from a step-by-step propulsion actuated by an electro-magnet. The poles of the latter are adjacent, and between them oscillates a magnetised needle carrying the arbor of a ratchet wheel of fifteen teeth, which engages with a fixed pawl and is thus slowly turned by the currents received; this motion is recorded by a counter.
