Transportation arrangement with spotlight projectors for illumin

Details Transportation arrangement with spotlight projectors for illumin Transportation arrangement with spotlight projectors for illumin

1976-07-26

1978-11-14

Wintercorn, Richard A.

Illumination

Combined

362293, 212 13, 212130, F21V 3300

Patent

active

041258894

ABSTRACT:
A transportation arrangement with spotlight projectors for illuminating the trunnions of a molten iron ladle for viewing by an operator when engaging a hoisting hook with the trunnion of the ladle. A spotlight projector employs a very high pressure mercury lamp as a light source and the beam of light from this light source is projected in the form of a bundle of parallel light rays of specific wavelengths through a collimator lens system. This system employs an elliptic reflecting mirror, a slit, a filter for transmitting specific wavelengths and a convex lens. The projected bundle of parallel light rays consists of a group of green and yellow bright-line spectra having a center wavelength of 5,000 A. The projector is designed to be mounted on an overhead travelling crane and its projection optical axis is adjustable.

REFERENCES:
patent: 1018143 (1912-02-01), Vissering
patent: 1157966 (1915-10-01), Standerwick
patent: 3689761 (1972-09-01), Rosen et al.
patent: 3737653 (1973-06-01), Biggs et al.
patent: 3803400 (1974-04-01), Ozawa
patent: 3922085 (1975-11-01), Sheets

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