An electric-powered watch includes a balance wheel assembly which drives time display means. The balance wheel assembly includes a pivoted balance wheel staff, a central member fixed to the staff, and a balance wheel rim consisting only of a bundle of wires which are adhered together and self-supporting. The wires form a coil which cooperates with one or more magnetic fields to impulse the balance wheel assembly.

An electric timepiece indicates time by numerals which appear in openings provided on a casing surface of the timepiece. A time indicator mechanism includes time indication elements operable every unit of time such as a minute, a 10 minute interval, an hour and so forth. The driving force of a motor operates according to pulse signals applied at given intervals of time is transmitted selectively to the time indicator mechanism through a driving force transmission mechanism. The transmission mech...

The present invention relates to an electric timepiece with a driving regulator mechanism, the oscillations of which are electrically sustained by means of a transistorized circuit comprising at least two windings, i.e. a pickup winding and a driving winding. This timepiece is characterized by the fact that it comprises two winding carrying plates on each of which is secured one of these windings, one of the said plates carrying moreover the transistor or transistors as well as at least one part...

A driving device for an electronic timepiece including a multipole stepping motor driven by an alternative pulse generator operating under the control of a time standard oscillator. The timepiece includes a time indicating gear train including an indexing mechanism having a pawl and a ratchet wheel attached to the second wheel of said train to insure the incremental step action of said stepping motor.

A battery-operated clock having an opening formed within the housing thereof for the insertion of a battery. A movable contact plate is provided and may be moved to close the opening by means of a slidable adjustment nut and bolt combination projecting through the clock housing. The movable contact plate is formed in a concave configuration so as to apply a spring bias to the slidable adjustment nut and bolt combination which secures the movable contact plate to a flat contact plate fixed to the...

An oscillator in the form of a pair of parallel resilient arms joined at one end and free at the other end. The arms oscillate in counterphase and each has a mass element on the free end so disposed thereon as to counterbalance the torque about a line between the arms which is developed by oscillation of the arms. At the free ends of the arms one thereof has associated therewith a driver for driving the arms, while the same, or the other arm, has a device thereon for imparting motion to a driven...

The following specification describes an hour meter assembly utilizing a solid-state circuit applying appropriately timed pulses to a coil capable of driving the meter dials with portions of the coil magnetic circuit and terminals supplying electrical power to the circuit serving to locate and secure an assembly of the solid-state circuit and dials in a meter case.

A graphic recorder has a string drive for the recording pen, the string being secured to and passing around a pulley mounted to a clutch hub. A potentiometer is also mounted to the clutch hub. A servomotor drives a bull gear having a clutch ring affixed thereto. The clutch ring drives the hub through a pair of "O" -rings, frictionally fit therebetween, the torque capacity being adjustable by an axially adjustable retainer.

The dashpot of this invention includes a substantially cylindrical glass tube in which travels a piston having a diameter slightly less than that of the interior of the tube. A modified liquid or gum defines the medium in the cylinder in which the piston is adapted to travel. The flow ingenerated in the cylinder is predominantly a pressure flow with the shear flow being relatively insignificant. The device of the present invention operates in the lubrication region whereby relatively small timer...

A device for a timepiece to correct or regulate the running of a turnable mechanical oscillatory partially magnetic system wherein a coaxially turnable permanent magnet is located near the system to influence turning of the latter and reduce thrust on the oscillator bearing.