Abstract: A battery charger for rapidly charging batteries of different capacity types is controlled by a microprocessor. The microprocessor controller is also connected to a voltage source which is connected to the battery for supplying a charging current to the battery at a current value selected by a user. The controller is also connected to a voltage reference generator which generates a reference voltage equal to a conditioned battery voltage at the beginning of a charging cycle. The reference voltage increases in predetermined voltage increments as the battery voltage increases during the charging cycle until the battery voltage reaches a peak voltage. A comparator compares the conditioned battery voltage to the reference voltage and sends the results of the comparison to the microprocessor controller. The microprocessor controller causes the reference voltage generator to increase the reference voltage by a predetermined voltage increment if the conditioned battery voltage is greater than the reference voltage.

Abstract: An electromechanically controlled board game for two players, each of which has a set of playing pieces which are advanced on a board in rank or file increments to attack pieces of the opposing player. The pieces are so configured that the relative value of each piece is visible only to the holder of the piece during play. An attacking piece is compared in value with the piece attacked by comparing a four bit code assigned to each piece with a corresponding code assigned to the piece attacked. The lower valued piece is considered captured, and is retired without disclosure of its relative value to the opposing player. Each side has one piece designated "flag" the object of the game being to capture the flag of the opposing side.

Abstract: An engine-sound accessory for an electric toy vehicle produces a sound output which varies its characteristics in proportion to an electric input to the toy vehicle. The apparatus measures the total electric current fed to the toy vehicle to produce a sound control signal proportional thereto. When two or more vehicles are fed from a common power source, the apparatus is responsive to the sum of the electric current fed to the two or more vehicles whereby variation in the electric current fed to one or both of the vehicles produces a corresponding variation in the sound characteristic.