Abstract: A battery pack containing a rechargeable battery is detachable to a charger unit for charging under the control of a charging circuit in the charger unit. The battery pack includes a sensor output circuit which comprises a temperature sensor for sensing the temperature of the battery being charged. A voltage dividing resistor network is formed in the sensor output circuit and receives a constant current from the charging circuit upon attachment of the battery pack to the charger unit such that it provides an enable signal of a first voltage level to the charging circuit for allowing the charging of the battery at a first charge rate so long as the sensed battery temperature is below a predetermined reference level. When the sensed battery temperature exceeds the reference level, the voltage dividing resistor network responds to provide a stop signal of a second voltage level for inhibiting the charging at the first charge rate.

Abstract: A hair clipper has cutter head comprising a set of a stationary blade and a movable blade each having teeth in its forward edge. The movable blade is driven to reciprocate on the stationary blade for hair shearing. The hair shearing can be operated selectively at either of hair cutting, hair trimming, and hair thinning modes which are characterized to have respective effective hear shearing zones of different capability optimum suitable for the intended modes.

Abstract: A casing for an electric appliance provided on its outer surface with a plurality of minute tapered projections which are of 15 to 30 microns in height and bottom diameter whereby a minute projections shed the water wetting the body resulting in the water not having a bad effect upon the electric appliance.

Abstract: Electric shaver of battery powered and washable type having a watertight housing structure. A battery covering detachably mounted to housing bottom opening for holding batteries inside the housing includes a lock and seal which are activated, responsive to the covering's mounting operation, respectively in directions transversing the housing axis to lock the covering to the housing interior wall and in the housing axial directions to achieve uniform abuttment of the covering to the interior wall for clamping therebetween a watertight ring seal.

Abstract: Battery charging device having a function of indicating in sounds at least one of charging and discharging states of a storage battery, specifically adapted to be incorporated in battery operated electric implements. During charge operation, a charging circuit oscillatorily generates from a rectified direct current of commercial AC source current a high frequency charging voltage, of which oscillation becomes intermittent with varying intervals after a predetermined battery charge level is reached, whereby a charge complete detecting circuit causes a sound generating device to be operated to sound discriminatively initial and final charge complete indications responsive to the varying intervals. During discharge operation, a charge remind detecting circuit provides an output to the sound generating means only after a predetermined discharge level is reached, to cause the means device to be operated to sound a charge remind indication.