Patent US4634950A successfully refreshed from Google Patents.
US4634950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric apparatus
Assignee: Individual
•
Filing: 1984-07-02
•
Granted: 1987-01-06
•
Expires: 2004-07-02
Abstract
Abstract An electric machine which is adapted to function as a motor or generator without any major electrical or mechanical modifications and conforms to conventional electric machine manufacturing practices. This machine has associated therewith, microprocessor controls. There is provided two balanced phase synchronous electrical machines whose moving windings are attached to a common carrier and whose stationary windings are attached to a common body. One of the two balanced phase electric machines is electrically and mechanically designed to be a balanced phase synchronous power motor or power generator at the utility frequency while the other balanced phase electric machine is electrically and mechanically designed for a higher frequency. The high frequency electric machine is driven by a modulated high frequency signal whose modulation frequency is equal to the utility frequency. The resulting signal transformed on to the moving windings of the high frequency electric machine, which now includes the velocity and displacement frequency component of the common carrier, drives the moving windings of the power motor or generator electric machine after it is demodulated of its high frequency component. As a result, the developed magnetic field on the moving windings of the power motor or generator electric machine will always be synchronized to the magnetic field developed on the stationary windings of the power motor or generator electric machine. Inherent in the invention is a means to convert mechanical displacement and velocity into an electrical signal. A transducer or any combination of transducers which propagates energy using an electric field, a magnetic field, an electromagnetic field, or a light field implements the communication between the moving apparatus and stationary apparatus without electrical wires connected between them. As a result, by controlling the phase, amplitude, and frequency of the modulation signal with the microprocessor controls, numerous motor and generator functions can be achieved. The principles described herein also apply to electric linear machines appropriately resulting in designating the electric machine of this invention as the Advanced Programmable Electric Motion Machine or APEMM.
Inventors
- 👤 Frederick W. Klatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:27
CPC Classifications
H; H02; H02P; H02P5/00; H02P5/74; H02P25/00; H02P25/02; H02P25/022; H02P25/024
Claims Analysis
Total Claims: 86
Claim 1
Independent Claim
273 words
An electric machine comprising; a first electric machine having at least one stationary winding and associated moving winding, a second electric machine having at least one stationary winding and associated moving winding, both said first and second electric machines having a common carrier so as to provide motion at the same velocity, said common carrier comprising a moving common carrier and a stationary common carrier, means coupling the moving winding of the first electric machine to the moving winding of the second electric machine whereby the moving winding of the second electric machine is excited from the first machine, means coupling a first frequency signal to the stationary winding of the first electric machine, means coupling a second frequency signal to the stationary winding of the second electric machine, means for communicating electrical signals between the moving common carrier and the stationary common carrier, whereby synchronous overall operation occurs for any moving speed of the axial, said means for communicating including a communication transducer system including a moving member associated with either rotor and a stationary member associated with the corresponding stator, said first frequency being substantially greater than said second frequency whereby the torque of the machine is chiefly dependent on the second electric machine, said first frequency coupling means comprising modulating means for receiving a third frequency signal substantially the same as said second frequency signal and continuously modulating said first frequency by said third frequency, said first electric machine having windings which are physically and electrically smaller than those of said second electric machine whereby the physical size of the overall machine is dependent primarily upon the second electric machine.
Claim 2
Dependent Claim
273 words
An electric machine comprising; a first electric machine having at least one stationary winding and associated moving winding, a second electric machine having at least one stationary winding and associated moving winding, both said first and second electric machines having a common carrier so as to provide motion at the same velocity, said common carrier comprising a moving common carrier and a stationary common carrier, means coupling the moving winding of the first electric machine to the moving winding of the second electric machine whereby the moving winding of the second electric machine is excited from the first machine, means coupling a first frequency signal to the stationary winding of the first electric machine, means coupling a second frequency signal to the stationary winding of the second electric machine, means for communicating electrical signals between the moving common carrier and the stationary common carrier, whereby synchronous overall operation occurs for any moving speed of the axial, said means for communicating including a communication transducer system including a moving member associated with either rotor and a stationary member associated with the corresponding stator, said first frequency being substantially greater than said second frequency whereby the torque of the machine is chiefly dependent on the second electric machine, said first frequency coupling means comprising modulating means for receiving a third frequency signal substantially the same as said second frequency signal and continuously modulating said first frequency by said third frequency, said first electric machine having windings which are physically and electrically smaller than those of said second electric machine whereby the physical size of the overall machine is dependent primarily upon the second electric machine.
Claim 3
Dependent Claim
28 words
An electric apparatus as set forth in claim 1 wherein said electric machines both have a pair of stator windings and associated rotor windings for two phase operation.
Claim 4
Dependent Claim
18 words
An electric apparatus as set forth in claim 2 wherein said first frequency coupling means comprises modulating means.
Claim 5
Dependent Claim
22 words
An electric apparatus as set forth in claim 1 wherein said modulation is one of phase, amplitude, pulse width, or frequency modulation.
Claim 6
Dependent Claim
32 words
An electric apparatus as set forth in claim 4 wherein said means coupling the moving winding of the first machine to the moving winding of the second machine comprises a demodulating means.
Claim 7
Dependent Claim
38 words
An electric apparatus as set forth in claim 1 wherein said means coupling the moving winding of the first machine to the moving winding of the second machine comprises only the electro-mechanical demodulating means of the physical rotor.
Claim 8
Dependent Claim
37 words
An electric apparatus as set forth in claim 1 wherein both said first and second electric machines have a predetermined number of stationary windings and associated moving windings to satisfy multiphase operation including one winding per phase.
Claim 9
Dependent Claim
34 words
An electric apparatus as set forth in claim 1 wherein said means coupling the moving winding of the first electric machine to the moving winding of the second electric machine comprises a demodulating means.
Claim 10
Dependent Claim
18 words
An electric apparatus as set forth in claim 8 wherein said demodulating means comprises an electronic synchronous demodulator.
Claim 11
Dependent Claim
16 words
An electric apparatus as set forth in claim 1 wherein said means for communicating is monodirectional.
Claim 12
Dependent Claim
16 words
An electric apparatus as set forth in claim 1 wherein said means for communicating is bi-directional.
Claim 13
Dependent Claim
47 words
An electric apparatus as set forth in claim 1 wherein the means for communicating between the moving common carrier and the stationary common carrier is without physical contact and includes means defining one of an electric field, a magnetic field, an electro-magnetic field and a light field.
Claim 14
Dependent Claim
18 words
An electric apparatus as set forth in claim 12 wherein the coupling fields are modulated with said information.
Claim 15
Dependent Claim
27 words
An electric apparatus as set forth in claim 1 wherein said means for communicating includes a field converting means comprising an electric-to-field transducer or a field-to-electrical transducer.
Claim 16
Dependent Claim
17 words
An electric apparatus as set forth in claim 14 wherein said field converting means comprises a modulator/demodulator.
Claim 17
Dependent Claim
30 words
An electric machine as set forth in claim 1 wherein said means coupling a first frequency signal to the stationary windings of the first electric machine comprises an electronic demodulator.
Claim 18
Dependent Claim
32 words
An electric machine as set forth in claim 16 wherein the output of said electronic demodulator has multiple phase signals corresponding to the number of phase windings including at least one phase.
Claim 19
Dependent Claim
34 words
An electric machine as set forth in claim 1 wherein said means coupling the moving windings of the first electric machine to the moving windings of the second electric machine comprises an electronic modulator.
Claim 20
Dependent Claim
27 words
An electric machine as set forth in claim 18 wherein the output of said electronic modulator has multiple phase signals corresponding to the number of phase windings.
Claim 21
Dependent Claim
14 words
An electric machine as set forth in claim 1 wherein the motion is rotational.
Claim 22
Dependent Claim
14 words
An electric machine as set forth in claim 1 wherein the motion is linear.
Claim 23
Dependent Claim
30 words
An electric machine as set forth in claim 1 wherein said means copupling a first frequency signal to the stationary windings of the first electric machine comprises an electronic modulator.
Claim 24
Dependent Claim
209 words
An electric apparatus comprising; a first electric machine having at least one stator winding and associated moving winding, a second electric machine having at least one permanent magnet and associated moving winding, both said first and second electric machine having a common axial so as to provide rotation at the same angular velocity, means coupling the moving winding of the first electric machine to the moving winding of the second electric machine, means coupling a first frequency signal to the stator winding of the first electric machine, means for communicating parametric information or propagating electrical energy between either moving winding and stator winding without physical contact, whereby synchronous overall operation occurs for any velocity of the common carrier, said first frequency being substantially greater than said second frequency whereby the force of the machine is chiefly dependent upon the second electric machine, said first frequency coupling means comprising modulating means for receiving a third frequency signal substantially the same as zero frequency or D.C. and continuously modulating said first frequency by said third frequency, said first electric machine having windings which are physically and electrically smaller than those of the second electric machine whereby the physical size of the overall machine is dependent primarily upon the second electric machine.
Claim 25
Dependent Claim
209 words
An electric apparatus comprising; a first electric machine having at least one stator winding and associated moving winding, a second electric machine having at least one permanent magnet and associated moving winding, both said first and second electric machine having a common axial so as to provide rotation at the same angular velocity, means coupling the moving winding of the first electric machine to the moving winding of the second electric machine, means coupling a first frequency signal to the stator winding of the first electric machine, means for communicating parametric information or propagating electrical energy between either moving winding and stator winding without physical contact, whereby synchronous overall operation occurs for any velocity of the common carrier, said first frequency being substantially greater than said second frequency whereby the force of the machine is chiefly dependent upon the second electric machine, said first frequency coupling means comprising modulating means for receiving a third frequency signal substantially the same as zero frequency or D.C. and continuously modulating said first frequency by said third frequency, said first electric machine having windings which are physically and electrically smaller than those of the second electric machine whereby the physical size of the overall machine is dependent primarily upon the second electric machine.
Claim 26
Dependent Claim
30 words
An electric machine as set forth in claim 23 wherein said means coupling a first frequency signal to the stationary windings of the first electric machine comprises an electronic demodulator.
Claim 27
Dependent Claim
32 words
An electric machine as set forth in claim 24 wherein the output of said electronic demodulator has multiple phase signals corresponding to the number of phase windings including at least one phase.
Claim 28
Dependent Claim
34 words
An electric machine as set forth in claim 23 wherein said means coupling the moving windings of the first electric machine to the moving windings of the second electric machine comprises an electronic modulator.
Claim 29
Dependent Claim
27 words
An electric machine as set forth in claim 26 wherein the output of said electronic modulator has multiple phase signals corresponding to the number of phase windings.
Claim 30
Dependent Claim
14 words
An electric machine as set forth in claim 23 wherein the motion is rotational.
Claim 31
Dependent Claim
14 words
An electric machine as set forth in claim 23 wherein the motion is linear.
Claim 32
Dependent Claim
39 words
An electric machine as set forth in claim 23 wherein both said first and second electric machines have a predetermined number of stationary windings and associated moving windings to satisfy multiphase operation including at least one winding per phase.
Claim 33
Dependent Claim
26 words
An electric machine as set forth in claim 30 wherein said third frequency of modulation comprises multiple phase signals corresponding to the number of phase windings.
Claim 34
Dependent Claim
24 words
An electric machine as set forth in claim 23 wherein said modulation is at least one of phase, amplitude, pulse width, or frequency modulation.
Claim 35
Dependent Claim
35 words
An electric machine as set forth in claim 23 wherein said means coupling the moving windings of the first electric machine to the moving windings of the second electric machine comprises an electronic demodulating means.
Claim 36
Dependent Claim
24 words
An electric machine as set forth in claim 33 wherein the resulting signals of the demodulating means is multiphased including at least one phase.
Claim 37
Dependent Claim
41 words
An electric machine as set forth in claim 23 wherein said means coupling the moving windings of the first electric machine to the moving windings of the second electric machine comprises only the electromechanical demodulating means of the physical electric apparatus.
Claim 38
Dependent Claim
18 words
An electric machine as set forth in claim 23 wherein said means for communication is monodirectional or bidirectional.
Claim 39
Dependent Claim
21 words
An electric machine as set forth in claim 35 wherein said means for communication comprises a modulator or demodulator or both.
Claim 40
Dependent Claim
50 words
An electric machine as set forth in claim 36 wherein said communication between the moving common carrier and the stationary common carrier is without physical contact and includes the transduction of the process information to one of an electric field, a magnetic field, an electro-magnetic field, and a light field.
Claim 41
Dependent Claim
26 words
An electric machine as set forth in claim 23 wherein the stationary windings of said second electric machine are replaced with at least one permanent magnet.
Claim 42
Dependent Claim
30 words
An electric machine as set forth in claim 23 wherein said means coupling a first frequency signal to the stationary windings of the first electric machine comprises an electronic modulator.
Claim 43
Dependent Claim
225 words
An electric apparatus comprising; a first electric machine having at least one stationary winding and associated moving winding, a second electric machine having at least one stationary winding and associated moving winding, both said moving windings of the first and second electric machines have a common carrier so as to provide motion at the same velocity, means coupling the moving windings of the first electric machine to the moving windings of the second electric machine, means coupling a first frequency signal to the stationary windings of the first electric machine, means coupling a second frequency signal to the stationary windings of the second electric machine, means for communicating process information between the moving common carrier and the stationary carrier, whereby synchronous overall operation occurs for any velocity of the common carrier, said first frequency being substantially greater than said second frequency whereby the torque or force of the machine is chiefly dependent on the second electric machine, and said first frequency coupling means comprising modulating means for receiving a third frequency signal substantially the same as said second frequency signal and continuously modulating said first frequency by said third frequency, said first electric machine having windings which are physically and electrically smaller than those of the second electric machine whereby the physical size of the overall machine is dependent primarily upon the second electric machine.
Claim 44
Dependent Claim
225 words
An electric apparatus comprising; a first electric machine having at least one stationary winding and associated moving winding, a second electric machine having at least one stationary winding and associated moving winding, both said moving windings of the first and second electric machines have a common carrier so as to provide motion at the same velocity, means coupling the moving windings of the first electric machine to the moving windings of the second electric machine, means coupling a first frequency signal to the stationary windings of the first electric machine, means coupling a second frequency signal to the stationary windings of the second electric machine, means for communicating process information between the moving common carrier and the stationary carrier, whereby synchronous overall operation occurs for any velocity of the common carrier, said first frequency being substantially greater than said second frequency whereby the torque or force of the machine is chiefly dependent on the second electric machine, and said first frequency coupling means comprising modulating means for receiving a third frequency signal substantially the same as said second frequency signal and continuously modulating said first frequency by said third frequency, said first electric machine having windings which are physically and electrically smaller than those of the second electric machine whereby the physical size of the overall machine is dependent primarily upon the second electric machine.
Claim 45
Dependent Claim
39 words
An electric machine as set forth in claim 41 wherein both said first and second electric machines have a predetermined number of stationary windings and associated moving windings to satisfy multiphase operation including at least one winding per phase.
Claim 46
Dependent Claim
26 words
An electric machine as set forth in claim 42 wherein said third frequency of modulation comprises multiple phase signals corresponding to the number of phase windings.
Claim 47
Dependent Claim
24 words
An electric machine as set forth in claim 41 wherein said modulation is at least one of phase, amplitude, pulse width, or frequency modulation.
Claim 48
Dependent Claim
35 words
An electric machine as set forth in claim 41 wherein said means coupling the moving windings of the first electric machine to the moving windings of the second electric machine comprises an electronic demodulating means.
Claim 49
Dependent Claim
24 words
An electric machine as set forth in claim 45 wherein the resulting signals of the demodulating means is multiphased including at least one phase.
Claim 50
Dependent Claim
41 words
An electric machine as set forth in claim 41 wherein said means coupling the moving windings of the first electric machine to the moving windings of the second electric machine comprises only the electromechanical demodulating means of the physical electric apparatus.
Claim 51
Dependent Claim
18 words
An electric machine as set forth in claim 41 wherein said means for communication is monodirectional or bidirectional.
Claim 52
Dependent Claim
21 words
An electric machine as set forth in claim 48 wherein said means for communication comprises a modulator or demodulator or both.
Claim 53
Dependent Claim
50 words
An electric machine as set forth in claim 49 wherein said communication between the moving common carrier and the stationary common carrier is without physical contact and includes the transduction of the process information to one of an electric field, a magnetic field, an electro-magnetic field, and a light field.
Claim 54
Dependent Claim
26 words
An electric machine as set forth in claim 41 wherein the stationary windings of said second electric machine are replaced with at least one permanent magnet.
Claim 55
Dependent Claim
24 words
An electric machine as set forth in claim 41 wherein said second frequency signal is not applicable and said third frequency signal is zero.
Claim 56
Dependent Claim
30 words
An electric machine as set forth in claim 41 wherein said means coupling a first frequency signal to the stationary windings of the first electric machine comprises an electronic demodulator.
Claim 57
Dependent Claim
25 words
An electric machine as set forth in claim 53 wherein the output of said electronic demodulator is a multi-phase signal including at least one phase.
Claim 58
Dependent Claim
34 words
An electric machine as set forth in claim 41 wherein said means coupling the moving windings of the first electric machine to the moving windings of the second electric machine comprises an electronic modulator.
Claim 59
Dependent Claim
24 words
An electric machine as set forth in claim 55 wherein said electronic modulator has multiple phase signals corresponding to the number of phase windings.
Claim 60
Dependent Claim
30 words
An electric machine as set forth in claim 41 wherein said means coupling a first frequency signal to the stationary windings of the first electric machine comprises an electronic demodulator.
Claim 61
Dependent Claim
32 words
An electric machine as set forth in claim 57 wherein the output of said electronic demodulator has multiple phase signals corresponding to the number of phase windings including at least one phase.
Claim 62
Dependent Claim
34 words
An electric machine as set forth in claim 41 wherein said means coupling the moving windings of the first electric machine to the moving windings of the second electric machine comprises an electronic modulator.
Claim 63
Dependent Claim
27 words
An electric machine as set forth in claim 59 wherein the output of said electronic modulator has multiple phase signals corresponding to the number of phase windings.
Claim 64
Dependent Claim
14 words
An electric machine as set forth in claim 41 wherein the motion is rotational.
Claim 65
Dependent Claim
14 words
An electric machine as set forth in claim 41 wherein the motion is linear.
Claim 66
Dependent Claim
30 words
An electric machine as set forth in claim 41 wherein said means coupling a first frequency signal to the stationary windings of the first electric machine comprises an electronic modulator.
Claim 67
Dependent Claim
217 words
An electric rotating machine comprising; a first electric rotating means having at least one stator winding and associated rotor winding, a second electric rotating means having at least one stator winding and associated rotor winding, both said first and second electric rotating means having a common axial so as to provide rotation at the same angular velocity, means coupling the rotor winding of the first electric rotating means to the rotor winding of the second electric rotating means, means coupling a first frequency signal to the stator winding of the first electric rotating means, means coupling a second frequency signal to the stator winding of the second electric rotating means, whereby synchronous overall operation occurs for any rotational speed of the axial, said first frequency being substantially greater than said second freqency whereby the torque of the machine is chiefly dependent on the second electric rotating means, said first frequency coupling means comprising modulating means for receiving a third frequency signal substantially the same as said second frequency signal and continuously modulating said first frequency by said third frequency, said first electric rotating means having windings which are physically and electrically smaller than those of the second electric rotating means whereby the physical size of the overall machine is dependent primarily upon the second electric rotating means.
Claim 68
Dependent Claim
217 words
An electric rotating machine comprising; a first electric rotating means having at least one stator winding and associated rotor winding, a second electric rotating means having at least one stator winding and associated rotor winding, both said first and second electric rotating means having a common axial so as to provide rotation at the same angular velocity, means coupling the rotor winding of the first electric rotating means to the rotor winding of the second electric rotating means, means coupling a first frequency signal to the stator winding of the first electric rotating means, means coupling a second frequency signal to the stator winding of the second electric rotating means, whereby synchronous overall operation occurs for any rotational speed of the axial, said first frequency being substantially greater than said second freqency whereby the torque of the machine is chiefly dependent on the second electric rotating means, said first frequency coupling means comprising modulating means for receiving a third frequency signal substantially the same as said second frequency signal and continuously modulating said first frequency by said third frequency, said first electric rotating means having windings which are physically and electrically smaller than those of the second electric rotating means whereby the physical size of the overall machine is dependent primarily upon the second electric rotating means.
Claim 69
Dependent Claim
30 words
An electric machine as set forth in claim 64 wherein said means coupling a first frequency signal to the stationary windings of the first electric machine comprises an electronic modulator.
Claim 70
Dependent Claim
207 words
An electric apparatus comprising; a first electric machine having at least one stationary winding and associated moving winding, a second electric machine having at least one stationary winding and associated moving winding, both said first and second electric machines having a common carrier so as to provide motion at the same linear velocity, means coupling the moving winding of the first electric machine to the moving winding of the second electric machine, means coupling a first frequency signal to the stationary winding of the first electric machine, means coupling a second frequency signal to the stationary winding of the second electric machine, whereby synchronous overall operation occurs for any moving speed of the carrier, said first frequency being substantially greater than said second frequency whereby the torque or force of the machine is chiefly dependent on the second electric machine, said first frequency coupling means comprising modulating means for receiving a third frequency signal substantially the same as said second frequency signal and continuously modulating said first frequency by said third frequency, said first electric machine having windings which are physically and electrically smaller than those of said second electric machine whereby the physical size of the overall machine is dependent primarily upon the second electric machine.
Claim 71
Dependent Claim
207 words
An electric apparatus comprising; a first electric machine having at least one stationary winding and associated moving winding, a second electric machine having at least one stationary winding and associated moving winding, both said first and second electric machines having a common carrier so as to provide motion at the same linear velocity, means coupling the moving winding of the first electric machine to the moving winding of the second electric machine, means coupling a first frequency signal to the stationary winding of the first electric machine, means coupling a second frequency signal to the stationary winding of the second electric machine, whereby synchronous overall operation occurs for any moving speed of the carrier, said first frequency being substantially greater than said second frequency whereby the torque or force of the machine is chiefly dependent on the second electric machine, said first frequency coupling means comprising modulating means for receiving a third frequency signal substantially the same as said second frequency signal and continuously modulating said first frequency by said third frequency, said first electric machine having windings which are physically and electrically smaller than those of said second electric machine whereby the physical size of the overall machine is dependent primarily upon the second electric machine.
Claim 72
Dependent Claim
30 words
An electric machine as set forth in claim 66 wherein said means coupling a first frequency signal to the stationary windings of the first electric machine comprises an electronic demodulator.
Claim 73
Dependent Claim
32 words
An electric machine as set forth in claim 67 wherein the output of said electronic demodulator has multiple phase signals corresponding to the number of phase windings including at least one phase.
Claim 74
Dependent Claim
34 words
An electric machine as set forth in claim 66 wherein said means coupling the moving windings of the first electric machine to the moving windings of the second electric machine comprises an electronic modulator.
Claim 75
Dependent Claim
27 words
An electric machine as set forth in claim 69 wherein the output of said electronic demodulator has multiple phase signals corresponding to the number of phase windings.
Claim 76
Dependent Claim
14 words
An electric machine as set forth in claim 66 wherein the motion is rotational.
Claim 77
Dependent Claim
14 words
An electric machine as set forth in claim 66 wherein the motion is linear.
Claim 78
Dependent Claim
39 words
An electric machine as set forth in claim 66 wherein both said first and second electric machines have a predetermined number of stationary windings and associated moving windings to satisfy multiphase operation including at least one winding per phase.
Claim 79
Dependent Claim
26 words
An electric machine as set forth in claim 73 wherein said third frequency of modulation comprises multiple phase signals corresponding to the number of phase windings.
Claim 80
Dependent Claim
24 words
An electric machine as set forth in claim 66 wherein said modulation is at least one of phase, amplitude, pulse width, or frequency modulation.
Claim 81
Dependent Claim
35 words
An electric machine as set forth in claim 66 wherein said means coupling the moving windings of the first electric machine to the moving windings of the second electric machine comprises an electronic demodulating means.
Claim 82
Dependent Claim
24 words
An electric machine as set forth in claim 76 wherein the resulting signals of the demodulating means is multiphased including at least one phase.
Claim 83
Dependent Claim
41 words
An electric machine as set forth in claim 66 wherein said means coupling the moving windings of the first electric machine to the moving windings of the second electric machine comprises only the electromechanical demodulating means of the physical electric apparatus.
Claim 84
Dependent Claim
26 words
An electric machine as set forth in claim 66 wherein the stationary windings of said second electric machine are replaced with at least one permanent magnet.
Claim 85
Dependent Claim
24 words
An electric machine as set forth in claim 66 wherein said second frequency signal is not applicable and said third frequency signal is zero.
Claim 86
Dependent Claim
30 words
An electric machine as set forth in claim 66 wherein said means coupling a first frequency signal to the stationary windings of the first electric machine comprises an electronic modulator.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-05 | 1990-07-07 | 1991-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-05 | 1994-07-07 | 1995-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-05 | 1998-07-07 | 1999-01-06 | $7700.00 | Window Closed / Lapsed |