Abstract: A thermoelectric module is capable of successfully reducing the heat stress for increased reliability. The module includes a plurality of thermoelectric chips of P-type and N-type arranged in a matrix between sets of first and second contacts to form a series electrical circuit. The chips are arranged to give at least three chip arrays each having a limited number of the chips. A first carrier is provided on one side of the chips to carry the first contacts and to include first bridges each integrally joining two adjacent first contacts to define first discrete couples for electrical connection of the chips in each chip array. The first carrier further includes at least two inter-array bridges which are solely responsible for electrical interconnection between the adjacent chip arrays.

Abstract: A thermoelectric module is capable of successfully reducing the heat stress for increased reliability. The module includes a plurality of thermoelectric chips of P-type and N-type arranged in a matrix between sets of first and second contacts to form a series electrical circuit. The chips are arranged to give at least three chip arrays each having a limited number of the chips. A first carrier is provided on one side of the chips to carry the first contacts and to include first bridges each integrally joining two adjacent first contacts to define first discrete couples for electrical connection of the chips in each chip array. The first carrier further includes at least two inter-array bridges which are solely responsible for electrical interconnection between the adjacent chip arrays.

Abstract: An ingot plate (10) of cleaveable thermoelectric material has a layered structure having substantially parallel cleavage planes. Substantially all of the cleavage planes are disposed at a less cleavage angle with respect to the upper and lower faces (11, 12) of the plate. The ingot plate can be successfully cut into bars (20) along cutting planes generally perpendicular to the cleavage planes without causing substantial interlayer fracture. Electrodes (25) are formed on the opposite sides of the bar which are defined by the cutting planes. The bar is in use to be cut into a number of discrete chips (30) with one of the electrodes fixed on a substrate. Since the cutting is made along planes again generally perpendicular to the cleavage planes of the bar, the bar can be successfully cut into the corresponding chips without causing any substantial fracture.

Abstract: A Peltier effect module comprising a plurality of Peltier effect elements arranged in parallel between a pair of substrates where the Peltier effect elements are connected to connection electrodes disposed on the substrates. The array of Peltier effect elements is sealed off by a hollow seal frame surrounding the Peltier effect element array with a seal formed by a bond between both end edges of the seal frame and the substrates. Because the perimeter around the Peltier effect elements is sealed using a seal frame metalically bonded at both ends to the substrates, resistance to moisture penetration is largely determined by the material from which the seal frame is made. Therefore, by appropriately selecting the seal frame materials, the Peltier effect module can be reliably protected for a long period of time against moisture penetration.

Abstract: A leakage detecting device for electrical appliance is provided with electrodes (17) for detecting a state in which an electrical appliance such as a hair dryer is submerged in water. When the electrodes (17) are in a short-circuited state, relay means (3) is driven to open a contact (7). As a result, supply of the power supply voltage from a commercial power source (1) to the loads such as a motor (15), a heater (16) and the like is stopped so that an accident due to leakage can be prevented in such cases as a case in which the electrical appliance has been dropped into the water.

Abstract: A power control system for electrical apparatus, in which a unidirectional rectifying device is connected to one of a plurality of loads connected mutually in parallel, an ignition circuit comprising a plurality of resistors is connected between the loads and a switching element whose conduction phase is controllable, and at least one of the resistors in the ignition circuit is connected through the unidirectional rectifying device to the said load, whereby the power supply to each of the plurality of loads can be controlled in an individual manner by means of the single switching element.

Abstract: A rotor for coreless motor comprises a cylindrical coil of a wire wound as repetitively folded back to alternately change current flowing direction with respect to magnetic field of associated stator of the motor and inner conductor of the wire is exposed at a plurality of portions equally spaced in the folded back parts forming an axial endwise edge of the cylindrical shape of the coil. The conductor exposing portions corresponds in number to stator poles and thus commutator segments, the latter of which are disposed adjacent and around an end of rotor shaft and connected respectively at a radially extended end substantially directly to the coil's conductor at each of its exposed portions.