Abstract: A luminaire apparatus includes a luminaire housing body, an electrical cable member and a power source. Means are combined with the cable for compressibly securing one end of the cable in the housing in a position to provide an effective moisture seal and the cable jacket is held in fixed relation to the housing so that strain or pulling forces exerted on the cable are not transmitted to electrical conductors contained therein. When the power source is a battery of the class used in a miner's cap lamp apparatus, for example, in which the housing body is a headpiece to be attached to a miner's "hard hat", the electrical cable may have an opposite end sealably engaged in the battery top, and provided with a strain relief member. A portion of the cable extending inside the battery top is held in a cable locking device so that pulling forces exerted on the cable are not applied to electrical conductors connected to battery terminals.

Abstract: A source of radiant energy is combined with spaced apart reflecting surfaces which are derived from the parabolic and which have a common focal point but differing focal lengths. Radiant energy is reflected in substantially parallel rays and passed through radiation transmitting means which include radiation controls zones. The reflecting surfaces and the radiation transmitting means are mounted for rotary displacement of one relative to the other to vary the distribution pattern, intensity, color, and other characteristics of the reflected radiant energy in a unique manner. Radiation output from the source of radiant energy may be instantly tailored to a task at hand such as may arise, for example in theatrical lighting, mine lighting, police and surveillance work, military operations, fire fighting, sports activity, illumination of recreational areas and the like.

Abstract: An improved storage battery of the lead-acid class includes grid structures provided with grid complement means in the form of enclosure bodies of a chemically inert material selectively arranged about portions of the grid structure to protectively reinforce same. These protectively reinforced grid structures, embodied in either a negative plate or a positive plate, may be utilized advantageously in making and operating the lead-acid battery, and are desirable for plates in which an active material is contained in tubes or occurs in pasted form. The enclosure bodies may be a material impermeable to electrolyte. Where the grid structure for a positive plate is provided with an antimony content, the enclosure bodies constitute a barrier which substantially inhibits release of antimony from all portions of the grid structure which are not in contact with the active material.