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Publication of GB235202ApublicationCriticalpatent/GB235202A/en
235,202. Lerden, B. June 6, 1924, [Convention date]. Head lamps, personal; phosphorescence, apparatus for lighting by.-A screen-like viewing device, preferably in spectacle form, is provided with an annular reflector c fitted with one or more holders for exchangeable electric lamps g arranged near the viewing aperture b. The reflector is provided with flanges d, f, the latter forming the viewing aperture b and an insulating pad i. The lamps g are mounted in the recess formed by the flanges d, f and a cover glass k may be fitted. The Specification as open to inspection under Sect. 91 (3) (a) comprises also the use of selfluminous bodies in place of electric lamps. This subject-matter does not appear in the Specification as accepted.