Two sided marker

Details Two sided marker Two sided marker

1991-10-15

1993-06-29

Arnold, Bruce Y.

Optical: systems and elements

Signal reflector

3-corner retroreflective

359515, 359529, 359553, 404 14, 116 63R, G02B 5124

Patent

active

052239772

ABSTRACT:
The marker has a pair of upwardly converging reflectant planar panels facing approximately in opposite directions. In its correct attitude on a support surface the panels slope at 2.degree.-6.degree. to the vertical if the marker is intended for assisting the landing of fixed wing aircraft and at 8.degree.-10.degree. to the vertical if the marker is intended for assisting the landing of helicopters. The reflectant panels are preferably retroreflectant.

REFERENCES:
patent: 2561016 (1950-03-01), Ford et al.
patent: 4428320 (1984-01-01), Oplt et al.
patent: 4440104 (1984-04-01), Bleiweiss et al.
patent: 4466376 (1984-08-01), Wells
patent: 4726706 (1988-02-01), Attar
patent: 4770495 (1988-09-01), Lees
patent: 4778250 (1988-10-01), McRoskey et al.
patent: 4875799 (1989-10-01), Harrison

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