An electric toothbrush including a pressure fluid device for applying fluid under pressure to teeth to be cleaned or to a bristle set. The pressure fluid device includes a pressure fluid supply in the interior of a movable drive translator. A brush part with a carrier tube is movably mounted with a drive translator therein adapted to be coupled to a drive element in a handle part. A movably mounted bristle carrier mounts a set of bristles and is adapted to be driven in an oscillatory manner by t...

A motor shaft puts through a motor casing and a gear casing which are detachably connected to each other. In the motor casing, a rotor is fixed to the motor shaft, while a stator is fixed on the inner circumferential surface of the motor casing. The motor shaft has a worm which engages with a worm wheel in the gear casing. A collar in which the motor shaft is pressingly fitted is provided in the middle of the motor shaft at the end of the gear casing. The motor shaft is supported at each end of ...

The present invention provides electrical cables that can be surely discriminated from one another, even when only a part of an outer surface of each cable is exposed. An electrical cable 1 has an electrically conductive core 5 and a sheathing layer 6 covering the core 5. The sheathing layer 6 has an outer surface 6a with a mono-color. On the outer surface 6a, a first mark 7 and a second mark 8 are provided. At an end 1a of the cable 1, the first mark 7 is provided on a first outer surface 1b wh...

The rotor of the outer-rotor type wheel-in motor of the electric wheel includes a field generator facing the outer surface of the stator across from an electrical gap. The field generator includes pole magnets magnetized in the radial direction with respect to the rotation axis of the wheel-in motor, adjacent two of the pole magnets having opposite directions of magnetization so that magnet polarity of the field generator alternates at a predetermined pole pitch along the circumferential directi...

As for a transistor, overlapped are factors such as a variation of a gate insulation film which occurs due to a difference of a manufacturing process and a substrate used and a variation of a crystalline state in a channel forming region and thereby, there occurs a variation of a threshold voltage and mobility of a transistor.This invention provides an electric circuit which used a rectification type device in which an electric current is generated only in a single direction, when an electric po...

An electric toothbrush in which the brushing head moves in an elliptical motion such that, on the brushing stroke, the bristles are proximate the teeth, and in the recovery portion of the cycle the bristles are pulled away from the teeth. A position sensitive switch automatically switches from a forward to a reverse operation of the electric motor, depending on the positioning of the toothbrush in a user's hand, allowing the user to brush both the upper and lower teeth using a stroke carrying th...

An electric cell comprising a positive electrode, a negative electrode containing aluminum or aluminum alloy, and an electrolyte arranged between the positive electrode and the negative electrode, wherein the electrolyte includes: at least one ion selected from a group of a sulfate ion (SO.sub.4.sup.2-) and a nitrate ion (NO.sub.3.sup.-), the concentration of the ion being in the range of 0.2 to 16 M/L; and an additive selected from a group of an organic acid, a salt of the organic acid, a hydra...

An electric camera includes an image sensing device with a light receiving surface having N vertically arranged pixels and an arbitrary number of pixels arranged horizontally, N being equal to or more than three times the number of effective scanning lines M of a display screen of a television system, a driver to drive the image sensing device to vertically mix or cull signal charges accumulated in individual pixels of every K pixels to produce a number of lines of output signals which correspon...

An electric motor includes a rotor shaft arranged in a casing and having an axial hollow bore formed therethrough for passage of lubricating oil, a rotor, a stator, a pair of bearings each having an inner race and an outer race, a pair of bearing fixing parts supporting the rotation of the rotor shaft, and bearing cooling devices each having a cylindrical heat dissipation portion fixedly secured to the rotor shaft so as to be in contact with either one of end faces of the individual inner races,...

Such a configuration is achieved that shell connecting portion which is a contact portion of conductive shells of first and second connectors fitted to each other in a direction approximately perpendicular to multipolar arrangement is disposed opposite to a terminal connecting portion which is a contact portion of conductive terminals, so that contact pressure at the shell connecting portion is caused to function on the terminal connecting portion to improve electric contact performance of the t...