Flight recorder with static electronic memory
First Claim
Patent Images
1. A flight recorder comprising:
- a flight protection enclosure comprising an outer wall made of a material having pores which open upon exceeding a given high temperature threshold,an inner wall defining a useful cavity,a fire resistant substance separating the inner and outer walls, said substance being based on chemically bonded water, and resisting fire by being vaporized and absorbing calories when subjected to a high temperature environment corresponding to said given high temperature, whil evaporating water out through said pores of the outer wall;
a plurality of printed circuit cards wedged in the cavity;
memory means comprising non-volatile EEPROM-type memory chips on such cards said chips being enclosed within casings for resisting a high pressure environment;
a passage through said inner and outer walls for passing electrical connection means from the exterior to the interior of said cavity; and
a corrosion resistant coating applied to said printed circuit cards whereby said flight recorder is temporarily resistant to fire and deep sea immersion despite sensitivity of said chips.
0 Assignments
0 Petitions
Accused Products
Abstract
A flight recorder (MPV) is contained within a two-walled chassis (11, 13), of which the walls are separated by a fire-resistant material (12). The memory means consist of hybrid circuits (H1-H8) of the EEPROM type. These are associated with a control card that may act as a fuse. The hybrid circuits (H1-H8) are mounted so as to be pressure-resistant. The flight parameters are alternating recorded on two memory cards (MC1 and MC2) and also in their hybrid circuits.
27 Citations
10 Claims
-
1. A flight recorder comprising:
-
a flight protection enclosure comprising an outer wall made of a material having pores which open upon exceeding a given high temperature threshold, an inner wall defining a useful cavity, a fire resistant substance separating the inner and outer walls, said substance being based on chemically bonded water, and resisting fire by being vaporized and absorbing calories when subjected to a high temperature environment corresponding to said given high temperature, whil evaporating water out through said pores of the outer wall; a plurality of printed circuit cards wedged in the cavity; memory means comprising non-volatile EEPROM-type memory chips on such cards said chips being enclosed within casings for resisting a high pressure environment; a passage through said inner and outer walls for passing electrical connection means from the exterior to the interior of said cavity; and a corrosion resistant coating applied to said printed circuit cards whereby said flight recorder is temporarily resistant to fire and deep sea immersion despite sensitivity of said chips. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification