Abstract: A lead-acid battery construction comprises a casing, electrolyte means received in the casing and positive and negative electrode means mounted in the casing in contact with the electrolyte and being spaced apart by separator means. The positive electrode means includes a shaped grid structure having a top bar, a lug and depending spine portions, and further includes active material contained within tube means held in contact with the spines. An enclosure body is located around portions of the shaped grid structure in a position to selectively prevent flow of current from surfaces of the grid structure not in contact with active material. The enclosure body consists of self-registering plastic grid complement means and is formed with depending parts which are engaged inside distended upper ends of the tube means.A further inventive aspect resides in a method of engaging grid complement means with shaped grid structure means.

Abstract: A utility handlamp, comprising battery jar means having enclosure means detachably secured thereto, is disclosed. Optical control means including light transmitting means, having reflector means affixed thereto, is engaged in threaded, rotatable relationship with a tubular extension of the enclosure means. A light source in the enclosure means may be focused by rotation of the optical control means. Stop means are provided to limit the extent of rotation of the optical control means.The enclosure body is further provided with a resilient, depending clip element which cooperates with parts of the battery jar means and enclosure means for mounting the handlamp on a belt, pocket, etc. and for providing a plurality of stable positions of the handlamp such that the path of travel of an emitted light beam may be varied along desired directions of angularity.

Abstract: Safety lamp apparatus, suitable for use as a miner's cap lamp, includes a housing body closed at one side by a plastic light transmitting member. A bulb member is yieldably received in the housing body and is operable, when energized, to provide a filament in a state of incandescence for emitting visible radiation. During use of the apparatus in an explosive atmosphere conditions may arise where deformation of the light transmitting member from external impact forces directed thereagainst may drive deformed portions of the light transmitting member against the bulb member with sufficient force to cause bulb breakage and resulting explosion of the atmosphere.In the present invention protective means is provided comprising an arrangement of parts defining an oblique angular relationship between the central longitudinal axis of the bulb member and the impacting surface of the deformed portion of the light transmitting member.

Abstract: A holder, for example a multiple light source socket, is mechanically travelled in a supporting structure, in both rotary and linear paths of travel. Rotary travel provides for interchangeably locating lamps along a focal axis in a luminaire housing. Linear travel of the socket provides a focusing adjustment for each lamp along the focal axis to position it at a desired point of focus. In one form the supporting structure may comprise a miner's cap lamp having an externally located knob which may be manually turned by a miner to move the socket member. Other forms of supporting structures and movable parts may be provided as hereinafter disclosed.

Abstract: Improved positive electrode means for use in a lead-acid battery includes a shaped grid structure, a self-registering plastic grid complement member selectively overlying portions of the shaped grid structure, tube means engaged around depending portions of the grid complement member and active material confined within the tube means. Assembly of these constituent parts is characterized by a first insertion of the shaped grid structure into the grid complement member thereby to produce an angular displacement of self-registering side portions of the grid complement member; further advancement of the shaped grid structure into the grid complement member enables the angularly displaced side portions of the grid complement to revert to their normal position in self-registering relationship to the grid structure.

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 operatingthe 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.

Abstract: A luminaire housing body is formed with a reflector chamber closed at one side by a radiation transmitting member. At an opposite side, the housing is extended to form a socket enclosure. A lamp socket member is rotatably mounted in the socket enclosure and is structured to define spaced apart inwardly dished reflector surfaces, hereinafter referred to as concaved reflective surfaces, in each of which a lamp may be placed at a focal point and independently energized by electrical means. A reflector member is located in back of the radiation transmitting member and is formed with a socket aperture.At either side of the concaved reflector surfaces, the socket member is shaped to present tapered outer ends which can be moved into and out of the socket aperture. The arrangement of the parts is such that a de-energized lamp is constantly shielded by the tapered ends to prevent shadow or distortion when another lamp is in use.

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: 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.