Abstract: An electromagnetic, two phased pulse motor rotatable in either of two rotary directions has a radially-magnetized rotor with a rotor axis and four magnetic poles of alternating polarities distributed evenly about the rotor axis whereby adjoining magnetic axes are oppositely polarized, and has two magnetic coils coupled magnetically to the rotor via two stator plates, each of which has two stator poles that are arranged relative to each other symmetrically reversed to a center line. Two of the stator poles directly adjoin each other and are offset from each other by an angle of 45.degree., and another two of the stator poles are offset from each other by an angle of 135.degree.. Each of the first two stator poles has a pole surface disposed at a substantially constant distance from a surface of the rotor. Each of the second two stator poles has first and second pole surfaces disposed respectively at different distances from the rotor surface.

Abstract: A timed chime system wherein the minute timer of a clock mechanism generates a start chime signal every half hour. The start chime signal is applied to turn on a power switch to apply power to the elements of the chime system and to set system components to begin a chime cycle. In response to the start chime signal, the hour timer of the clock mechanism operates a coder to generate a BCD count signal corresponding to the position of the hour hand of the clock. The BCD count signal is then applied to set a particular hour count in a programmable counter and a chime tone circuit is activated to generate a number of Bim-Bam audio tones. As each Bim-Bam audio tone is generated, the programmable counter is decremented by one and, when the counter is decremented to zero, the chime system is reset. After a particular time delay, the power switch is operated to turn off system power.

Abstract: An electronic digital clock includes an arbitrary number of fixed value stores the BCD stored values of which are compared with the BCD time representative signals generated by the clock to produce, in the event of coincidence, an electrical output signal which serves for switching purposes. In order to reduce the number of connections to be made to an integrated clock chip the clock may include a changeover switch which enables connections to the clock display device also to be used as connections to the stores.

Abstract: A unipolar rotary step motor having a polarized rotor which turns step-by-step in response to the magnetic field of a control coil as the coil is periodically pulsed by spaced unidirectional current pulses. The magnetic circuit includes, in addition to a magnetizing coil wound about the stator, a permanent magnet whose polarity of magnetization is opposite to that of the magnetization resulting from the coil. The configuration of the air gap between the stator and the rotor is such that the respective zones or regions of influence of, on the one hand, the permanent magnet alone, and, on the other hand, the combination of the permanent magnet with the magnetization resulting from the control coil, each extend over more than 180.degree. of rotor rotation and thus overlap each other. Each current pulse supplied to the control coil causes a complete rotation of the rotor.

Abstract: This invention relates to electric clocks and chart recorders driven by crystal controlled electric motors. The motor includes two stator plates, a rotor and a drive coil surrounding the legs of the stator plates. The rotor carries a pinion which drives the first gear of a mechanical gear train located between two side plates consisting of synthetic resin material. One of the side plates carries at least one bearing for the rotor and a plurality of projections which fit into holes in the stator plates and serve to position the stator plates in relation to the rotor. Electric pulses are supplied to the drive coil by an electronic frequency divider circuit having a push-pull output stage; a zener diode is connected in parallel with the power supply to the divider circuit and the drive coil to enable the motor to operate satisfactorily over a range of supply voltages.