Abstract: A contact-breaker device that can be miniaturized, realize low power consumption and low cost, and generate an irregular pulse current by causing irregular electrical conduction and insulation of a circuit. The contact-breaker device comprises: fixed terminals 12A and 12B secured at positions spaced apart from each other; and a movable member 11 capable of moving relative to the fixed terminals 12A and 12B and coming into or avoiding contact with the fixed terminals 12A and 12B based on its movement, thereby causing electrical conduction or insulation between the fixed terminals 12A and 12B; wherein the movable member 11 irregularly moves in accordance with externally applied vibration, thereby causing irregular electrical conduction or insulation between the fixed terminals 12A and 12B.

Abstract: A contact-breaker device that can be miniaturized, realize low power consumption and low cost, and generate an irregular pulse current by causing irregular electrical conduction and insulation of a circuit. The contact-breaker device comprises: fixed terminals 12A and 12B secured at positions spaced apart from each other; and a movable member 11 capable of moving relative to the fixed terminals 12A and 12B and coming into or avoiding contact with the fixed terminals 12A and 12B based on its movement, thereby causing electrical conduction or insulation between the fixed terminals 12A and 12B; wherein the movable member 11 irregularly moves in accordance with externally applied vibration, thereby causing irregular electrical conduction or insulation between the fixed terminals 12A and 12B.

Abstract: A mechanical cleaner for carpets or floors comprising a main casing having driving wheels which protrude through an open bottom and are rotatable by movement of the cleaner. A rotatable brush, driven by the wheels, is adapted to brush dust from the carpet or floor into a dust box on the main casing. A vertically moveable means for releasably mounting the brush comprises a pair of swinging frames, one end of each of which is rotatably journaled on the casing at a point spaced apart from the other swinging frame. The brush is rotatably mounted between the ends of the frames opposite the location of the journals and are urged downwardly. There is an engaging means on the casing which will releasably engage the frames and limit their downward movement. As a result, releasing the engaging means permits the frames carrying the brush to rotate downwardly to allow the brush to be detached and replaced by a new brush.