Beacon lamp which emits a conical beam

Details Beacon lamp which emits a conical beam Beacon lamp which emits a conical beam

1979-04-13

1981-04-28

Hix, L. T.

Illumination

Light source and modifier

Including translucent or transparent modifier

362335, F21V 504

Patent

active

042649480

ABSTRACT:
The invention relates to a beacon lamp which includes a substantially point source of light F surrounded by a transparent cap (1) which forms a lens (8). In accordance with the invention, said lens is chosen so that the emerging beam (9) occupies the nappe or sheet of a cone (10) having its apex at F. Application to air spotting survivors at sea of an air crash or a ship wreck, the survivors being equipped for example with life jackets including such lamps.

REFERENCES:
patent: 1139395 (1915-05-01), Armantage et al.
patent: 1495521 (1924-05-01), Kopp
patent: 2021611 (1935-11-01), Rolph
patent: 2254961 (1941-09-01), Harris
patent: 2310600 (1943-02-01), Robinson
patent: 2352801 (1944-07-01), Rolph
patent: 3886347 (1975-05-01), Dorman
patent: 4086483 (1978-04-01), Freund et al.
patent: 4161770 (1979-07-01), Maurer

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