A motor is driven in stepped fashion by a pulsed alternating output from an integrated counter circuit and a source of oscillation to drive a gear train of a clock in stepped increments. The motor includes a stator having a core with at least one pair of stator poles, a winding coupled to the core, and a rotor having permanently magnetized poles of alternately opposite polarity; while the oscillator includes a highly stable quartz crystal. The stepping motor is self starting within at least the ...

A stepping motor is disclosed which has a ratchet movement in a series of steps in a first path, which in the preferred embodiment is a circular path. The stepping motor is usable in a follow-up motor control system such as an antenna rotator with the rotator bi-directionally controlled in rotation and intermittently closing a pulsing switch. The stepping motor is usable as an indicator motor with this motor intermittently energized in accordance with energization of the rotator motor and closur...

A valve choke actuating device utilizes a stepping actuator with a feedback control system. A command signal and a feedback signal are compared to produce a train of electrical pulses proportional to the difference in the signals. The train of pulses are utilized to actuate piston-cylinder assemblies to control the opening of the choke.

A vehicle 1 comprises an upper mounting 2 which is a hollow beam pivotally attached via pivot means 4 to a lower mounting 3 which is also a hollow beam. A work platform 15 is fixed on to the upper mounting for translational movement with the mountings. Inner beams 5, 6, 10 and 11 are slidable within the outer beams 2 and 3 and have attached to each of their ends yokes, which in turn have attached at each of their ends legs 8 and 13. The legs have feet 9 and 14 and are telescopically extendible, ...

A stepping motor comprises a rotor assembly including a rotor shaft, a collar coaxially fixed to the rotor shaft, and a cylindrical permanent magnet block fixedly fitted on the collar, a yoke assembly including an inner yoke having a plurality of upper pole pieces arranged at regular angular intervals corresponding to an electrical angle of 2.pi. and a plurality of lower pole pieces arranged at regular angular intervals corresponding to an electrical angle of 2.pi., an upper outer yoke having po...

In a stepping motor having a stator and a rotor, the stator is made of a laminated iron core of a cylindrical shape having a plurality of slots formed around the periphery at a constant pitch. Coil windings concentrately wound are inserted in the slots, and permanent magnets of a planar shape are adhere around the surface of the iron core, thereby providing stator magnetic poles. The rotor on the other hand is made in the form of a circular disk at least a part of which is made of a magnetic mat...

Stepping device for a comptometer provided with a ratchet wheel and a pawl. An oscillating or reciprocating movement of the pawl is changed to a unidirectional rotary movement of the ratchet wheel. The pawl is forked or bifurcated to form shanks on diametrical opposite sides of the ratchet wheel, which shanks are each provided with a projection cooperating with the teeth of the ratchet wheel. A least one of the shanks is provided with another projection situated at a circumferential distance fro...

A drive for a clockworks in which a magnet is caused to oscillate adjacent a wheel in the radial direction of the wheel. An undulating magnetic path is formed on the wheel in the range of oscillation of the magnet and the configuration of the magnetic path is such that oscillation of the magnet will develop a torque on the wheel to drive it in one direction only.

A stepping motor includes stator coils on a stator sandwiched between a pair of covers, and a rotor shaft mounted for rotation on these covers and carrying a rotor composed of rotor yokes and rotor magnets. The rotor is rotated stepwise through a predetermined angle by drive signals supplied to the stator coils. The stator has stator magnets provided at an axially central position for cooperation with the rotor magnets, and the magnetic flux density in the gap between the stator and the rotor is...

A stepping switch comprising a driving part including a magnet, an armature and a lever supported at one end and having oppositely disposed claws at its free end that is movable transversely of a driven part that presents pins, which are engaged by wedged flanks of said claws which have smooth sliding surfaces that snugly engage the smooth sliding surfaces of the pins to advance the driven part while the wear on the sliding surfaces is so negligible as to permit the use of plastic components.