Electrical counting mechanism

Details Electrical counting mechanism Electrical counting mechanism

1978-10-19

1980-07-15

Boudreau, Leo H.

Registers

Platform operated

Platform actuated traffic counters

235 92C, 235 95R, G01C 2200, G06M 104

Patent

active

042130379

ABSTRACT:
An electrical counting device with a rotary counter, a rotary drive assembly having a driven rotor with a verge for indexing the counter in stepwise fashion and a coaxial drive rotor in frictional engagement with the driven rotor, a coil torsion spring biasing the drive rotor in one angular direction and a tension wire conductor extending angularly about a drum of the drive rotor and connected to be heated and thereby lengthened with an electrical current to index the counter a first one-half count with the torsion spring and a remaining one-half count with the tension wire upon subsequent cooling and contraction thereof.

REFERENCES:
patent: 3151809 (1964-10-01), Gerstenmaier
patent: 3502265 (1970-03-01), Vogtlin
patent: 3747848 (1973-07-01), Stothart
patent: 3997766 (1976-12-01), Voegelin
patent: 4009373 (1977-02-01), Young

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