Aircraft altitude annunciator

Details Aircraft altitude annunciator Aircraft altitude annunciator

1976-06-14

1979-01-16

Caldwell, Sr., John W.

Communications: electrical

Selective

Having indication or alarm

340 27AT, 340181, 340692, 360 12, G08G 500

Patent

active

041351436

ABSTRACT:
There is disclosed an annunciator for verbalizing altitude-related messages during the descent of an aircraft. Announcements such as "nine hundred," "eight hundred," etc. are made as the aircraft descends through respective "hundreds" levels; such announcements are not made during an ascent. In addition, the word "terrain" is heard when the aircraft descends through the 2,000-foot and 1,000-foot levels, and the word "minimum" is heard when the aircraft drops below a "decision height" selected by the pilot. Lastly, the word "glideslope" is out-putted in response to the detection of a glideslope deviation, the frequency of this announcement as well as its volume being a function of the magnitude of the deviation.

REFERENCES:
patent: 3538264 (1970-11-01), Van Dyke
patent: 3582949 (1971-06-01), Forst
patent: 3668621 (1972-06-01), Boyd
patent: 3715718 (1973-02-01), Astengo
patent: 3925751 (1975-12-01), Bateman
patent: 3988713 (1976-10-01), Bateman

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