Abstract: A system for sequentially charging a plurality of batteries initially interrogates each battery to determine the battery type and the level of charge. The charging system prioritizes the batteries to be charged from most to least fully charged and charges the batteries in that order. The charging is provided by pulsed current during sequential portions of periodic intervals to charge the batteries in a short period of time and utilize the battery charger to full or nearly full capacity.

Abstract: An electrical connection for a battery pack to a battery charger or the like consisting of a bracket including a substantially flat male plate having a plurality of spaced headed projections and female electrical terminals carried within a projecting housing and a substantially flat female plate having a plurality of keyholes designed to facilitate receiving the projections and pairs of fixed and movable male electrical terminals positioned within a recess for engagement with the female electrical terminals.

Abstract: A battery pack connection consists of a substantially flat male plate having a plurality of spaced headed projections and female electrical terminals carried within a projecting housing and a substantially flat female plate having a plurality of keyholes designed to facilitate receiving the projections and male electrical terminals positioned within a recess for engagement with the female electrical terminals. At least one rotatable member is mounted on the female plate and has a pin that engages over the head of a corresponding projection to enable locking of the plates in both their electrical and mechanical connected relationship. Upon rotation of the member, the pin is moved out of engagement with the projection to enable uncoupling of the plates. A safety latch can be activated to abut the rotatable member when the plates are locked together to preclude inadvertent decoupling.

Abstract: Cube-shaped, ventilated, individual light modules housing a lamp or bulb having different predetermined characteristics are interchangeably mounted on an expandable clip surrounding an electrical socket, by sliding the module down on the clip and simultaneously establishing electrical contact between the bulb in the module and a power source and switch. The front of the module is faced with safety glass to protect the bulb and subject, and a space is provided between the module and protective safety glass which can be fitted with one or more, swing-away, wide angle adapter, diffuser, or dichroic lenses.

Abstract: A battery charging apparatus and method is disclosed. The battery charger includes a programmable two level constant current source having an inhibit input. A clock signal is fed to counting stages which time out after a specified time, during which time the battery is charged with constant current. A temperature sensing circuit detects the temperature of the charging battery and will allow the battery to charge at a reduced rate for a longer time period if the temperature increases above a threshold level. Once the counting stages time out, the battery charger pulse charges the battery at the reduced current level, preferably at a 20% duty cycle, at relatively long intervals to keep the battery from self discharging.

Abstract: A battery pack connection consists of a flat male plate having a plurality of spaced headed projections and female electrical terminals carried within a projecting housing while a flat female plate has a plurality of keyholes designed to facilitate receiving the projections and male electrical terminals positioned within a recess together with a flexible strip that engages a projection to enable locking and unlocking of the plates in both their electrical and mechanical connected relationship. The flexible strip is moved away from its locking position by a cam on a pivoted actuator which can be moved by a finger.

Abstract: A battery pack connection consists of a flat male plate having a plurality of spaced headed projections and female electrical terminals carried within a projecting housing while a flat female plate has a plurality of through keyholes for receiving the projections and male electrical terminals positioned within a recess together with a flexible strip that engages a projection to enable locking and unlocking of the plates in both their electrical and mechanical connected relationship.