An electric clock with an electronic unit which generates a pulse train of constant frequency, and with a single-phase stepper motor to which this pulse train is fed comprising a stator with a field coil and n poles arranged in one plane. The motor has an m - pole permanent magnet armature. The elements of the hand mechanism are arranged between two plates.
A system for fastening the coil of a step-by-step motor in an electric or an electronic watch. It is characterized by the fact that one or both pole pieces 4 and 4' of the coil 2 have extrusions 10 and 11 of cylindrical shape which extend perpendicular to the plane of the pole piece 4 and are intended to be introduced into corresponding boreholes in the substrate of the printed circuit 1. This arrangement is advantageous since the extrusions can be produced by stamping before the heat treatment of the pole pieces, which eliminates the stresses which might, upon the mounting of the coil, destroy the magnetic qualities of the materials.
4086753 - Timepiece - Owned by Kabushiki Kaisha Seikosha (ALL OF,JA) Seiko Koki Kabushiki Kaisha (ALL OF,JA) Suwa Seikosha (ALL OF,JA)
A timepiece including two base plates opposite each other and defining a space therebetween, and having a gear train and an electro-mechanical converter for driving the gear train and both disposed in the space between the two base plates. The converter includes a stator comprised of a platelike member defining an intermediate plate portion positioned in the space between the two base plates. The intermediate plate portion supports gear train components and is isolated magnetically from the rest of the stator.
An electronic timepiece comprising a step-motor including a stator and rotor is disclosed. The timepiece is so constructed and arranged that a coil winding core of the stator is located between the stator and a dial of the timepiece and that said stator is disposed on said coil winding core.
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.
A compact electronic timepiece structure for a timepiece having an analog type display wherein the electromechanical transducer for the display and the circuit board for the electronics of the timepiece are combined into a single joint structure. The joint structure comprises an arcuous coil member wound on an insulative bobbin, a circuit board for supporting the electronic components and electrical interconnects between the components, a plurality of holes in the circuit board, and a plurality of thermoplastic fastening means extending through the holes of the circuit board and fastening the bobbin to the circuit board.
