CURTAIN DEVICE FOR REGULATING THE LIGHT FLUX PASSING THROUGH THE PORTHOLE OF AN AIRCRAFT OR SPACECRAFT Russian patent published in 2022 - IPC B64G1/22 G01N21/15 

FIELD: aviation.

SUBSTANCE: invention relates to devices for regulating the luminous flux and micrometeoritic protection of portholes of aircraft and spacecraft. The curtain device for regulating the light flux passing through the porthole of an aircraft or spacecraft consists of an inner swivel ring fixed in the outer fixed ring by means of profiled bearings. In this case, crescent-shaped segments are located between the outer fixed ring and the inner swivel ring, made with the possibility of moving towards the central part of the internal space of the device, the central parts of the bases of the three segments are located at an angle of 120° relative to each other and form an overlap of the central part of the curtain device, the remaining segments in the central the parts have arcuate cutouts, differing in size and shape, and form an overlap of the remaining internal space between the segments.

EFFECT: reduced clearance in the central part of the device.

1 cl, 9 dwg