Periscope apparatus comprising a single inverted pyramid

Details Periscope apparatus comprising a single inverted pyramid Periscope apparatus comprising a single inverted pyramid

1986-09-26

1988-08-16

Henry, Jon W.

350540, 350 11, 350276R, G02B 2308, G02B 2316

Patent

active

047639881

ABSTRACT:
A periscope head (10) is formed by a hollow structure of inverted pyramidal form connected to the periscope mast in the vicinity of the apex of the pyramidal form. The exterior surfaces (11, 12) of the head (10) are highly reflective and are substantially planar and they include a window (13) for transmission of radiation to an optical device within the head (10). The geometry and reflectivity of the head (10) render it relatively indistinguishable, in use, from the surrounding sea.

REFERENCES:
patent: 778694 (1904-12-01), Mustin
patent: 1275975 (1918-08-01), Murdock
patent: 1308283 (1919-07-01), Grebe
patent: 1311087 (1919-07-01), Olmsted
patent: 4150875 (1979-04-01), Stachiw et al.

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