Electrically phase locked motor

Claim 2

A constant speed device comprising rotatably mounted permanent magnet means, a drive coil spatially mounted with respect to said magnet means and magnetically coupled thereto to impart a rotative force to said magnet means upon energizing said drive coil, a sense coil spatially mounted with respect to said magnet means and magnetically coupled thereto to generate a signal responsive to rotation of said magnet means, a pulse generator a gating means responsive to the output of said sense coil and the output of said pulse generator to energize said drive coil, wherein said rotatably mounted permanent magnet means comprise rotatable shaft means, and a pair of permanent magnets mounted diametrically opposite each other and mutually normal on said shaft means to rotate therewith, and wherein said sense and drive coils are each mounted to magnetically couple with an associated one of said permanent magnets.

Claim 3

A constant speed device comprising a rotatable shaft, a nonmagnetic disc coaxially mounted on said shaft to rotate therewith, a plurality of permanent magnets mounted around the periphery of said disc and having the poles thereof like oriented, a drive coil mounted adjacent said magnets to magnetically couple upon excitation thereof with one of said magnets and impart a driving force thereto, a sense coil mounted adjacent said magnets to magnetically couple upon rotation of said shaft with each of said magnets and generate a pulse therefor, a pulse generator, and transistor gating means responsive to the output of said sense coil and the output of said pulse generator to energize said drive coil, wherein said gating means comprise a first transistor having the collector thereof connected to one terminal of said pulse generator, the base thereof connected to one terminal of said sense coil, and the emitter thereof connected to the other terminal of said sense coil; DC bias means; and a second transistor having the emitter thereof grounded and connected to the other terminal of said pulse generator; the base thereof connected to the emitter of said first transistor, and the collector thereof connected through said drive coil to said DC bias means.

Claim 4

A constant speed device comprising a rotatable shaft, a nonmagnetic disc coaxially mounted on said shaft to rotate therewith, a plurality of permanent magnets mounted around the periphery of said disc and having the poles thereof like oriented, a drive coil mounted adjacent said magnets to magnetically couple upon excitation thereof with one of said magnets and impart a driving force thereto, a sense coil mounted adjacent said magnets to magnetically couple upon rotation of said shaft with each of said magnets and generate a pulse therefor, a pulse generator, and transistor gating means responsive to the output of said sense coil and the output of said pulse generator to energize said drive coil, wherein said gating means comprise a first transistor having the collector thereof connected to one terminal of said pulse generator, the base thereof connected to one terminal of said sense coil, and the emitter thereof connected to the other terminal of said sense coil; DC bias means; and a second transistor having the emitter thereof grounded and connected to the other terminal of said pulse generator; the base thereof connected to the emitter of said first transistor, and the collector thereof connected through said drive coil to said DC bias means.

Claim 5

In an electromechanical device, in combination; a rotor having magnetic poles, with a sense coil cooperating with the rotor poles, and a drive coil also cooperating with the rotor poles, an amplifier, means electrically connecting said sense coil with said amplifier to supply an input signal thereto as the rotor rotates, and means to supply said driving coil with the output of said amplifier to supply driving impulses to said rotor, with said rotor motion acting to induce pulsating input signals into said sense coil, and other means separate from said amplifier for supplying to said amplifier a continuous, uninterrupted series of pulsating signals of a constant control frequency being a multiple of the frequency of said induced input signals which by the rotor action of the motor is divided to provide said driving impulses at a submultiple of said control frequency.

Claim 6

In an electromechanical device, in combination; a rotor having magnetic poles, with a sense coil cooperating with the rotor poles, and a drive coil also cooperating with the rotor poles, an amplifier, means electrically connecting said sense coil with said amplifier to supply an input signal thereto as the rotor rotates, and means to supply said driving coil with the output of said amplifier to supply driving impulses to said rotor, with said rotor motion acting to induce pulsating input signals into said sense coil, and other means separate from said amplifier for supplying to said amplifier a continuous, uninterrupted series of pulsating signals of a constant control frequency being a multiple of the frequency of said induced input signals which by the rotor action of the motor is divided to provide said driving impulses at a submultiple of said control frequency.

Claim 7

In an electronically phase-locked timekeeping device, in combination, a pivoted armature having at least two magnetic armature poles spaced apart from each other; a first magnetic field circuit adjacent a portion of the armature including a sense coil cooperating with at least one of said armature poles; a second magnetic field circuit associated with the armature but separate from and spaced apart from the aforesaid first magnetic field circuit including a drive coil other than said sense coil and cooperating with at least one armature pole other than the first mentioned of said armature poles; electrical armature-actuating circuitry for connection between said sense coil and said drive coil including an amplifier; means electrically connecting said sense coil with said armature-activating circuitry to supply input signals to said amplifier in response to movement of the armature; means to supply said drive coil with output signals from said amplifier to induce magnetic impulses into said second magnetic circuit and impart motion to said armature, with said armature motion acting to induce pulsating input signals into said sense coil; and other separate means supplying the armature-actuating circuitry with a continuous uninterrupted series of pulsating electric control signals of constant frequency at a multiply of the frequency of said induced pulsating input signals whereby motion of the armature will be at speed corresponding to a submultiple of said multiple frequency and cause said electrical armature-actuating circuitry to pulse the aforesaid drive coil at a fraction of the frequency rate of said control signals, but controlled thereby and in phase-locked relation therewith.

Claim 8

In an electronically phase-locked timekeeping device, in combination, a pivoted armature having at least two magnetic armature poles spaced apart from each other; a first magnetic field circuit adjacent a portion of the armature including a sense coil cooperating with at least one of said armature poles; a second magnetic field circuit associated with the armature but separate from and spaced apart from the aforesaid first magnetic field circuit including a drive coil other than said sense coil and cooperating with at least one armature pole other than the first mentioned of said armature poles; electrical armature-actuating circuitry for connection between said sense coil and said drive coil including an amplifier; means electrically connecting said sense coil with said armature-activating circuitry to supply input signals to said amplifier in response to movement of the armature; means to supply said drive coil with output signals from said amplifier to induce magnetic impulses into said second magnetic circuit and impart motion to said armature, with said armature motion acting to induce pulsating input signals into said sense coil; and other separate means supplying the armature-actuating circuitry with a continuous uninterrupted series of pulsating electric control signals of constant frequency at a multiply of the frequency of said induced pulsating input signals whereby motion of the armature will be at speed corresponding to a submultiple of said multiple frequency and cause said electrical armature-actuating circuitry to pulse the aforesaid drive coil at a fraction of the frequency rate of said control signals, but controlled thereby and in phase-locked relation therewith.