Abstract: A radial blower, in particular, for a breathing apparatus, has a blower housing with a central, axial intake opening and a radial or approximately tangential outlet opening as well as a motor-driven radial blower wheel arranged axially between the intake opening and the outlet opening. The radial blower wheel has a cover disk at the axial side facing the outlet opening with such a large diameter that between the outer circumference of the cover disk and an inner circumferential surface of the housing a constricted annular flow gap for the medium flowing through the radial blower wheel in the direction toward the outlet opening is formed.

Abstract: A small electric motor has a rotor with a permanent magnet and a shaft having a first end provided with a depression. Axial and radial bearings support the shaft. A bushing receives the first end of the shaft. The axial bearing has a non-magnetic ball positioned in the depression. A side of the ball remote from the shaft runs against a running surface of the bushing. The shaft is magnetically loaded toward the running surface so that the ball is forced against the running surface. The shaft is ferromagnetic and part of a magnetic circuit of the permanent magnet. The ball forms an air gap at the first shaft end. An end face of the shaft facing the air gap forms a magnetic pole that attracts magnetic particles in the area of the axial bearing and keeps them away from the running surface to counteract destruction of running surface and ball.

Abstract: A radial blower, in particular, for a breathing apparatus, has a blower housing with a central, axial intake opening and a radial or approximately tangential outlet opening as well as a motor-driven radial blower wheel arranged axially between the intake opening and the outlet opening. The radial blower wheel has a cover disk at the axial side facing the outlet opening with such a large diameter that between the outer circumference of the cover disk and an inner circumferential surface of the housing a constricted annular flow gap for the medium flowing through the radial blower wheel in the direction toward the outlet opening is formed.

Abstract: A mini-fan unit for cooling a printed circuit board has a collectorless dc motor and a fan wheel driven by the dc motor. The dc motor is a single phase, single core claw pole motor having a back iron free permanent magnet rotor. At least one positioning magnet defines the starting position of the dc motor.

Abstract: A timepiece, with a clockwork driven by a stepping motor, has a clockwork-supporting structure with front and rear uprights, generally of hourglass shape, each constituted by a pair of mirror-symmetrical coplanar strips defining its contour, the front upright being framed by an annular dial swept by the minute and hour hands; the gears of the clockwork are visible from all sides. The supporting structure with the dial is mounted on a platform carried by two columns above a base which contains the motor, its power supply and a tone generator controlled by the clockwork to emit acoustic time signals on the hour and possibly also on the half and quarter hours; a torsion pendulum without time-keeping function is suspended between the columns. Most of the shafts of the clockwork lie in a vertical plane of symmetry also containing the axis of the nested hour, minute and seconds shafts disposed at the center of the dial ring.

Abstract: An alarm clock has a cambered leaf spring traversed by a nest of clock-hand shafts projecting from a mounting plate designed as a printed-circuit board. The leaf spring is supported at opposite ends by posts rising from the mounting plate and is limitedly swingable about a centerline parallel to that plate and perpendicular to the axis of the nested shafts. A toothed control disk centered on the same axis, with a hub carrying an alarm hand, is axially shiftable under pressure of the cambered leaf spring upon alignment of a tooth on that disk with a notch in an adjoining hour wheel; two diametrically opposite metallic contacts formed by lateral tongues on that spring then engage respective countercontacts on the mounting plate to close a circuit for the emission of an acoustic alarm signal.

Abstract: A device for setting the time of actuation of a buzzer or other signal generator in an alarm clock comprises a flexible stem of a manually operable knob, rotatably journaled in two mounting plates, which carries a pinion normally engaging gear teeth of a disk freely rotatable about the hour shaft of the clockwork, the disk being under axial spring pressure urging it against an adjacent hour wheel which has one or more cutouts adapted to receive respective sawtooth-shaped cams on a confronting disk face when the wheel reaches the selected angular position. The user may turn the knob in either direction to advance or delay the selected time setting, except that any delay of 12 hours or more from the time of resetting is prevented by the interengagement of a steep cam flank with an edge of the associated cutout. If the user neverless turns the knob beyond that limit, the stem yields laterally and disengages its pinion from the disk teeth to obviate any damage to the mechanism.

Abstract: A rotary pendulum without time-keeping function, comprising an inertial body suspended from a clockwork housing of a preferably electronically driven timepiece through the intermediary of an elongate torsion spring, is periodically accelerated by the impact between a vane on the spring and radial camming teeth of an impeller wheel frictionally entrained on a horizontal seconds shaft of the timepiece via a spiral spring anchored to that shaft. The vane, near the upper end of the torsion spring, oscillates only through a half-cycle limited on the return swing by an abutment on the clockwork housing. The inertial body is secured to a latch member at the lower end of the torsion with the aid of a coupling ring on which a drag ring is rotatably mounted, the latter carrying a radial fin engageable with a fixed stop pin as well as with a peripheral lug on the coupling ring whereby the body can turn through almost two full revolutions before being positively arrested.

Abstract: A timepiece with an electrodynamically controlled clockwork has a torsion ndulum intermittently coupled through a gear train with the clockwork for the maintenance of its oscillations. The gear train includes a first pinion mounted on a weighted rocker tending to hold it in mesh with a driving gear actuated by the clockwork; the torsion spring of the pendulum carries near its suspension point a horizontal spur receivable in a slot of a stationary mounting member so as to come periodically to rest on a slot edge, this spur being engageable in its arrested position by a hump on a cam disk entrained by a second pinion which meshes with the first pinion and decouples the latter from the associated gear against the countervailing force of the rocker weight as long as the spur is immobilized. When the spur-biasing force of the torsion spring changes direction, the gear train is re-established and the spur receives an impetus from the engaging hump as it moves away from the arresting slot edge.

Abstract: A timepiece with an electrodynamically controlled clockwork has a torsion ndulum intermittently coupled through a gear train with the clockwork for the maintenance of its oscillations. The gear train includes a first pinion mounted on a weighted rocker tending to hold it in mesh with a driving gear actuated by the clockwork; the torsion spring of the pendulum carries near its suspension point a horizontal spur receivable in a slot of a stationary mounting member so as to come periodically to rest on a slot edge, this spur being engageable in its arrested position by a hump on a cam disk entrained by a second pinion which meshes with the first pinion and decouples the latter from the associated gear against the countervailing force of the rocker weight as long as the spur is immobilized. When the spur-biasing force of the torsion spring changes direction, the gear train is re-established and the spur receives an impetus from the engaging hump as it moves away from the arresting slot edge.