Abstract: An electrically operated device comprising a waterproof housing enclosing at least one dry galvanic battery cell and including gas discharge means in the housing in communication with the atmosphere exterior to the device for discharging evolved hydrogen gas from the battery cell such that the concentration of hydrogen gas within the housing interior is maintained below about 10% by volume.

Abstract: The invention includes a housing having a first hollow portion threadedly engaged with a second housing portion has a translucent section and an internal wall formed with a hole through which a light bulb extends. The light bulb has a collar on the base thereof which engages the internal wall. Formed within the first hollow portion is a hollow cylindrical member in which a battery is positioned with a spring positioned between one end of the portion which urges the other end of the battery to contact the base contact of the bulb. A wire contacts the base of the battery with the base of the light bulb.

Abstract: A fisherman's appliance to aid in attracting fish to a baited fish hook or artificial lure having a pair of spaced non-transparent circular plates between which is disposed an electric lamp bulb for directly illuminating surrounding water in which the appliance is suspended radially and horizontally outwardly from the appliance and in a relatively narrow vertical beam above and below the level of the appliance in the water.

Abstract: A lamp for use in subterranean galleries such as mines in which the cold-cathode discharge tube is received in a housing which, in turn, is removably mounted in a receptacle and is held in place by a ring clamping a flange of the housing against a flange of the receptacle. The housing may be provided with a translucent cover so that the housing can be removed and replaced as a unit. A reed switch on the receptacle cooperates with a magnet on the housing to deenergize the terminals of the housing upon its removal. The terminals of the discharge tube are embedded in an insulating potting mass within the housing.

Abstract: A portable magnetically actuatable flashlight that includes a hermetically sealed housing that has the light transmitting lens formed as an integral part thereof, and the housing capable of having an electric circuit defining cartridge on which the battery, light emitting bulb, light reflector, and electric circuit completing switch are mounted to be inserted into or removed from the housing. The electric switch is of the reed type, and is actuated to assume a closed position when a movable permanent magnet disposed exteriorly of the housing is moved to a first position for the magnetic field of the magnet to temporarily dispose the switch in an electric circuit completing position.

Abstract: A flat, disc-shaped EL lamp is removably mounted in the head of a conventional flashlight casing between the usual transparent lens and the bowl-shaped metal housing, which usually forms the reflector for a flashlight bulb. In this case, however, a converter circuit is potted in the housing and includes a spring contact, which projects from the front of the housing into resilient contact with a foil disc secured to the back of the EL lamp. The foil disc is connected to the back electrode of the lamp, and the front electrode is connected to a metal rivet which is seated against the periphery of the metal housing. When the switch on the flashlight is moved to its ON position, DC power from the batteries is converted by the potted circuit to an AC signal which is applied to the EL lamp electrodes to make the lamp glow.

Abstract: A diver's flashlight having a unitary case with a closed transparent end for light transmission, the other end being sealed by a threaded plug which also serves as a switch. A halogen bulb is mounted in a reflector immediately inside the transparent end and a rechargable battery is held normally out of contact with the bulb by a spring. Tightening the threaded plug overcomes the spring and completes the circuit when the plug is fully seated in sealed position. The plug, and a cap fitted over the transparent end, are of luminous material for night use.

Abstract: A capsule lamp as a fishing tackle in which an electric circuit connecting a light bulb and a battery across a switching mechanism is opened or closed in response to water pressure acting on a diaphragm adapted to be deformed by the water pressure into pressing engagement with the switching mechanism.

Abstract: An underwater swimming pool illumination system includes a lighting assembly having a lamp unit installed within its rear portion in a waterproof enclosure; and the lamp is connected to a low voltage battery. The waterproof enclosure may be at the bottom of a strut in an inverted L-shaped assembly, where the upper portion is a base which is fitted to a pad by a bayonet-type connection. The battery may be installed in the base, in which case the lighting assembly may be removed away from the pool to have the battery charged; or the battery may be remotely installed with a wire connection to the pad and lighting assembly. In either case, the installation is such that the lamp is completely electrically isolated from any alternating or ripple currents; either by physically removing the lamp from the pool for battery charging, or by a DPDT switch which either connects the battery to the lamp or to the charging circuit. This, in either case the battery is charged in a place remote from the swimming pool.