Registers – Platform operated – Platform actuated traffic counters
Patent
1977-10-25
1979-02-20
Thesz, Joseph M.
Registers
Platform operated
Platform actuated traffic counters
235 92DN, 235 92R, 364705, 235 92V, 235 92EV, G06M 314
Patent
active
041408977
ABSTRACT:
An electronic digital sequential counter in which a calculator chip, namely the Texas Instrument Corp.'s chip #TMS0972NL, is the single counting element. The count number is displayed on an LED readout that is compatible with the chip, and can accommodate up to eight (8) place figures with sign and floating decimal. The chip is programmed to count by a simple keyboard sequence consisting of the desired counting interval N followed by the "addition" function, and then N. The count is executed by triggering the "equals" function at each occurrence of the event to be counted. The counting interval N will add upon itself with every operation of the "equals" function. This function can be operated by several means by the event to be counted. A shaft rotation count encoder is described in which the "equals" function operating switch is arranged to close, thus allowing an event count, upon the occurrence of discrete events encoded on a rotating drum that is mechanically linked to the rotating shaft to be counted. A shaft rotation direction encoder is described in which a switch is closed mechanically, electromagnetically, optically or otherwise upon a change of direction in the shaft rotation. This switch operates the "change sign" function on the chip and so instructs the chip as whether to count down or to count up.
REFERENCES:
patent: 3654449 (1972-04-01), Boyce
patent: 3777126 (1973-12-01), Hoff
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