Encoding altimeter

Details Encoding altimeter Encoding altimeter

1976-03-08

1977-05-31

Thesz, Joseph M.

Registers

Platform operated

Platform actuated traffic counters

73384, 235 92DN, 235 92MT, 235 92R, G06M 302, H03K 2136

Patent

active

040271439

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: 3659081 (1972-04-01), Piccione
patent: 3789194 (1974-01-01), Kirby
patent: 3789195 (1974-01-01), Meier et al.
patent: 3878370 (1975-04-01), Santomango et al.
patent: 3917928 (1975-11-01), Wesner
patent: 3920961 (1975-11-01), Berg

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