Encoding altimeter

Details Encoding altimeter Encoding altimeter

1974-12-17

1976-06-01

Woodiel, Donald O.

328 44, 328 48, 73179, G01R 2902, G01C 2100

Patent

active

039612724

ABSTRACT:
The pressure of the atmosphere is sensed by a pressure transducer which causes a resistance to vary. The variance of this resistor is converted to a variable frequency. The number of cycles of this frequency in a set amount of time is counted by a counter and displayed by a digital display. An up/down counter is loaded with the count of the last digital readout in the previous cycle and counts down the number of cycles in the frequency of the next reading and displays the difference on a digital display or activates a sonic output if the countdown is greater than the stored previous count.

REFERENCES:
patent: 3500022 (1970-03-01), Toscano
patent: 3868845 (1975-03-01), Shimizu

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