Communications: electrical – Selective – Having indication or alarm
Patent
1980-06-30
1983-06-07
Groody, James J.
Communications: electrical
Selective
Having indication or alarm
73178T, 340 27R, 364433, 364430, G01C 2100, G08B 2100
Patent
active
043873600
ABSTRACT:
A system for providing an indication of a glidepath for aircraft using a conventional altimeter having a graduated dial scale and a rotatable pointer includes a plurality of individual indicating lights spaced around the circumference of the dial which are individually controlled by an onboard microcomputer to provide a time dependent, moving indication of a descent rate on the dial scale corresponding to a safe, theoretical glidepath, which indication may be followed by the altimeter pointer to maintain the aircraft on the glidepath. The microcomputer includes a microprocessor control unit, a random access memory for temporary data storage and a read only memory for permanent storage of programmed instructions for computing the glidepath. A manually operable keyboard device permits entry of glidepath data regarding the aircraft's speed, position, etc. into the random access memory for storage therein prior to arrival of the aircraft at a position marking the start of the glidepath whereat the system may be activated by operation of a single push button to produce the visual moving indication of the descent rate corresponding to the desired glidepath.
REFERENCES:
patent: 2732538 (1956-01-01), De Celles
patent: 3230507 (1966-01-01), Holt
patent: 3505504 (1970-04-01), Walker
patent: 3588477 (1971-06-01), Lami et al.
patent: 3668621 (1972-06-01), Boyd
patent: 3833933 (1974-09-01), Wilson
patent: 3967098 (1976-06-01), Harnagel et al.
Jourdan Ray M.
Williams Kenneth E.
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