Improvement on Pocket Flash Lamps
It is often desirable to concentrate the rays from a pocket flash lamp on a limited area rather than spreading them, as is the case with many lamps of this type. The addition of a hood, which may be slipped over the lens, as shown in the illustration, concentrates the light in this manner. A strip of sheet brass, about ¹⁄₃₂ in. thick, 4 in. long, and ³⁄₄ in. wide, was drilled at the center, forming an opening of the same diameter as the lens. A brass tube was soldered to fit over the hole. The ends of the strip were bent back at right angles, to hold the device firmly against the sides of the flash lamp. The lamp is used in the ordinary fashion, and the clip may be removed quickly when not needed. It may be plated or finished to suit the metal parts of the lamp.—Ralph W. Tillotson, Erie, Pa.