Abstract: An electromagnetic stepping motor for two directions of rotation has a stator (1), a rotor (6) and a housing (23). Four half-coils (2) with iron cores (4) are arranged equidistant from and with their axes parallel to the rotor axis (3) and perpendicularly to a return bridge (5). Each half-coil (2) is wound in the direction opposite the half-coils (2) lying opposite it. The iron cores (4) are connected magnetically to each other by a pole-shoe spider (8) at their ends which lie opposite the return bridge (5). The permanent magnet (7) of the rotor (6) is arranged within a central bore hole (9) of the pole-shoe spider (8), with the formation of an air gap.

Abstract: In a cross-coil rotary magnet device, a rotor (32) which is mounted rotatably together with a shaft (35) is formed of a permanent magnet (33) with diametrically opposite permanent magnet poles and a coil arrangement (10, 11) with coils which are arranged at an angular distance apart of, in particular, 90.degree.. For receiving the coils there is provided a coil body (14) which is divided into two parts (15, 16) and in which bearings (36, 37) of the shaft (35) of the rotor (32) are shaped in such a manner that the shaft protrudes out of the coil body at least one front outer end (12). One of the two parts (15, 16) of the coil body (14) has on this outer end tab-shaped clips (24-27) for the clamping attachment of an intermediate body (2). Bores (38-43) for connecting pins (4-7) are provided in the coil body parallel to the shaft (35). The cross-coil rotary magnet device can thus be adapted to numerous applications.

Abstract: In a motor, in particular for the electrical driving of a clockwork, a rotor (32) which is mounted rotatably together with a shaft (3) consists of a permanent magnet having diametrically opposite permanent magnet poles. A coil arrangement in the motor comprises two coils (10 and 11) arranged at angular distances of, in particular, 90.degree. apart from each other.

Abstract: A device for setting a resettable mechanical counter, has a stepping motor (1) which is developed as two-phase stepping motor having a rotor (32) consisting of a permanent magnet (33) with diametrically opposite permanent magnet poles and a coil arrangement (10, 11) with coils which are arranged at an angular distance apart of, in particular, 90.degree.. The stepping motor is connected to the counter via a gearing (2). In order to effect the resetting of the counter with the same stepping motor and with a compact construction of the device, the stepping motor has a coil body (14) to receive the coils, the coil body being divided into two parts (15, 16). Bearings (36, 37) of the shaft of the rotor being so formed in the coil body that the shaft extends out of the coil body (14) on at least the front outer end (12). The coil body has, for this purpose, furthermore, fastening elements on one outer end of one of the two parts for the attachment of an intermediate body which encloses the gearing.

Abstract: In an electromotive control device having an end disconnect switch, two circular conductive paths are arranged on an insulating support, at least one of said paths being less than an entire circle. Wiper contacts which connect the conductive paths are electrically connected to each other and are connected to a wheel which is driven by a motor, the wheel being mounted coaxially to the conductive paths. The limit disconnect switch and thus a setting element can be manufactured at low cost by the invention.

Abstract: The present invention relates to a motor for driving a clockwork. A rotatably supported rotor 1 has diametrically opposite permanent-magnet poles. A multi-phase coil arrangement is furthermore present to produce a magnetic field which deflects the rotor 1 out of its instantaneous position as a function of control signals present in each case on the coils 3 and 4 of the coil arrangement.The coil arrangement has a plurality of coils 3 and 4 arranged at an equiangular distance apart, surrounding the rotor 1, which coils can be controlled one after the other by sine voltages which are staggered a given angle apart.

Abstract: In a two-phase stepping motor having a rotor (1) with a disk-shaped axially magnetized permanent magnet (8) which has a plurality of poles of constant pole spacing, a first stator part (11) which bears an exciter winding (3) and has first stator poles (15) extending parallel to the face of the permanent magnet (8) and a second stator part (12) which bears an exciter winding (4) and has second stator poles (16) which extend parallel to the face of the permanent magnet (8), the two stator parts (11, 12) are arranged in a single plane, at least in the region of the stator poles (15, 16) and are connected with each other in said plane by intermediate pieces (13, 14) of small magnetic conductance. The first and second stator poles (15, 16) are each divided into two groups (17, 18; 20, 21) which are magnetically separated from each other, the one group (17, 20) being shifted by one rotor-pole spacing from the other group (18, 21 ).

Abstract: A single phase stepping motor, particularly for clocks, with a rotor having several pole teeth and a stator, the latter being made of two stator parts connected with one another via a bridge part, the latter carrying the excitation winding, of which each stator part on its free end has an equal or smaller number (in comparison to the rotor pole number) of stator pole teeth as well as a passage opening for the rotor shaft, the stator pole teeth being directed towards the face sides of the rotor. Each rotor pole tooth comprises a main pole and an auxiliary pole extending in the direction of rotation formed on the main pole, and between the stator pole teeth, a permanent magnetic circuit is provided, by means of which circuit the rest position of the rotor is determined during the unexcited stator condition.

Abstract: A single phase stepping motor, particularly for clocks, having a disc-like axially magnetized rotor with a number of rotor poles and a stator, which stator is made of at least two stator parts connected with one another via a bridge part carrying the excitation winding. Each stator part on its free end has a smaller number (in comparison to the number of rotor poles) of stator poles, the latter being directed toward the face side of the rotor. In the rest condition of the rotor, a rotor pole with its main part is disposed in the range of a stator pole and with an edge part in the range of the following stator pole.

Abstract: An electric clock with a quartz oscillator, a frequency divider connected following the latter and an output stage driven by the latter, in the output of the output stage there being disposed a single phase stepping motor which acts on a clockwork gear train driving the hour indicator and the minute indicator, as well as a storage battery supplying the operating voltage and a charging circuit for the battery. The single phase stepping motor and the clockwork gear train form a self-contained construction assembly. The quartz oscillator, the frequency divider, the output stage and the charging circuit are arranged on a single printed circuit board. The printed circuit board and the construction assembly are connected with one another via two electrically conducting pins secured on the excitation coil. The printed circuit board and the construction assembly are secured in common on a carrier plate, the latter having an opening for the hour tube and the minute tube, respectively.

Abstract: A single phase stepping motor, particularly for clocks, with a disclike, axially magnetized rotor with a number of poles and a stator, the latter being made of two stator parts connected with one another via a bridge part, the latter carrying the excitation winding, of which each stator part has on its free end a smaller number (in comparison to the rotor pole number) of main poles with auxiliary poles attached thereon as well as a passage opening for the rotor shaft, the main poles being staggered relative to one another by the same angle, the main poles being directed towards the face sides of the rotor. The main poles and the auxiliary poles which are coordinated to a stator part form an integral unit made of sheet metal with this stator part.

Abstract: A single phase stepping motor, particularly for clocks, with a multi-polar rotor and a multi-part stator, the latter carrying two excitation coils and on its free ends having stator pole teeth which are directed toward the rotor face side as well as a passage opening for the rotor shaft. The stator includes four parts, each of which has the same number of poles with the same distribution, and respectively two are connected with each other on their non-pole ends across one bridge part, the latter carrying one excitation winding. Both of the excitation windings are connected in series.

Abstract: A single phase stepping motor, particularly for clocks, with a disc-like, axially magnetized rotor with a number of poles and a stator, the latter being made of two stator parts connected with one another via a bridge part, the latter carrying the excitation winding, of which each stator part on its free end passes into a smaller number (in comparison to half of the rotor pole number) of main poles, the main poles being directed towards the face side of the rotor, at least a part of the main poles being provided with auxiliary poles. Both stator parts lie in a first plane at least in the region of the stator poles, and the rotor is arranged in a second plane parallel thereto. A return disc is disposed on a face side of the rotor, which faces away from the stator poles.

Abstract: A single phase stepping motor, particularly for clocks, with a rotor having several pole teeth and a stator, the latter being made of two stator parts connected with one another via a bridge part, the latter carrying the excitation winding, of which each stator part on its free end transfers into an equal or smaller number (in comparison to half the rotor pole number) of stator pole teeth, the stator pole teeth being directed towards the face side of the rotor. Both stator parts are arranged in a first plane at least in the region of the stator pole teeth and the rotor rotates in a second plane parallel thereto. The pole teeth of the rotor each comprises a main pole and an auxiliary pole, the latter extending in the direction of rotation and formed on the main pole, and between the stator pole teeth, there is provided a permanent magnetic circuit, by means of which circuit the rest position of the rotor is determined during the unexcited condition of the stator.

Abstract: A single phase stepping motor, particularly for clocks, with a rotor with several pole teeth, of which each pole tooth comprises a main pole and an auxiliary pole formed on the latter, and with a stator, the latter being made of two stator parts connected with one another via a bridge part, the latter carrying the excitation winding, of which each stator part on its free end transfers into an equal or smaller number (in comparison to the rotor pole number) of stator pole teeth, the stator pole teeth being directed towards the face side of the rotor, as well as a permanent magnetic circuit arranged between the stator pole teeth by means of which circuit the rest position of the rotor is determined with the unexcited condition of the stator.

Abstract: A single phase stepper motor is formed of a rotor having a shaft carrying a driving pinion and a permanent magnet and a stator having a body of diamagnetic or paramagnetic material, a field winding producing an excitation field transverse to the axis of the rotor shaft and a pair of diametrically opposed auxiliary poles spaced from the excitation field. The permanent magnet is constructed of a lanthanide ferromagnetic alloy, such as a lanthanide cobalt alloy and preferably a samarium cobalt alloy; and the permanent magnet has a moment of inertia substantially the same as or less than the moment of inertia of the combination of the rotor shaft and the driving pinion. The stator body has a plurality of pairs of holes therein for supporting a U-shaped, rod-like member having ends forming the auxiliary poles in a plurality of positions to permit adjustment of the direction of rotation and torque of the rotor.

Abstract: A device for damping the natural oscillations of the rotor of a stepper motor. A permanent magnet is fixed to the rotor and magnetically coupled with an inertia mass constructed of material with distinct hysteresis. The rotor is damped by conversion of mechanical momentum to hysteresis loss.

Abstract: A single-phase stepper motor with a bipolar or multipolar permanent magnet rotor and a stator with two L-shaped stator parts. Each stator part is provided at one end with a pole shoe that has main poles and auxiliary poles. A bridge with windings connects the ends of thestator parts which do not have pole shoes. Magnetically saturable intermediate parts connect the stator parts at opposite sides of the pole shoes, whereby the stator parts and the intermediate parts form a single one-piece unit.

Abstract: A damping chamber in an electric clock is provided with a closure surface which conforms to a closure surface on the shaft of the electric motor which drives the clock. The permanent-magnet rotor of the motor is displaced from the stator in a direction away from the damping chamber so that, when the stator is driven, it will generate a force component on the rotor which will force the shaft to increase the pressure on the closure surfaces, thereby improving the seal of the damping chamber when the motor is operated.

Abstract: The invention relates to an electric clock with an oscillator, especially a quartz oscillator, a frequency divider connected thereto, and a control stage connected to the output of the frequency divider either directly or via a pulse shaper stage. Through the control stage, a stepper motor, preferably a single-phase stepper motor, connected to the hand mechanism is acted upon by square-wave pulses of identical or alternating polarity.