Patent US4007408A successfully refreshed from Google Patents.
US4007408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for synchronization of a motor
Assignee: Individual
•
Filing: 1975-02-04
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Granted: 1977-02-08
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Expires: 1995-02-04
Abstract
Abstract Synchronization apparatus for a motor comprising a maintenance circuit furnishing to the motor the necessary energy for its rotation and delivering a frequency fm proportional to its speed, and utilizing a precise frequency fp furnished, for example, by a quartz oscillator connected to a frequency divider. Connected to a bistable phase comparator are the output frequency f1 = fp/x of a divider by x, and the output of frequency f2 of a divider by x + α to the input of which divider there is added αy impulses to each cycle of the frequency fm. The output of the phase comparator acts on the maintenance circuit such as to interrupt or re-establish the distribution of the energy to the motor according to whether this output is in one state or the other such that f2 is equal and in phase with f1 and fm is sychronized to a mean value equal to fp/xy for which α, x, and y are whole numbers.
Inventors
- 👤 Jean-Claude Berney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:33
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/29; H02P7/2913; G; G04; G04C; G04C11/00; G04C11/08; G04C11/081; G04C11/084; G04G; G04G3/00; G04G3/02; H02P23/00; H02P23/22; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/912
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
208 words
Apparatus for synchronizing the speed of a motor to a given precise frequency fp, the motor having a drive circuit which furnishes the motor with the necessary energy for its rotation, the motor delivering a frequency fm proportional to its speed, said apparatus comprising a divider by x having an input receiving a signal of frequency fp and an output at which is produced a signal with a frequency fp/x, a second divider of x + α having an input receiving signals of frequency fm + αy, said second divider having an output at which is produced a signal with a frequency f2, a phase comparator having two states, one of coincidence, the other of non-coincidence, said phase comparator having a first input connected to the output of the first divider and a second input connected to the output of the second divider, said phase comparator having an output connected to the motor drive circuit to interrupt or re-establish the distribution of energy to the motor according to whether the output of the phase comparator is in one state or the other to maintain f2 equal and in phase with f1 and synchronizing fm to a mean value of fp/xy, wherein α, x, and y are whole numbers.
Claim 2
Dependent Claim
208 words
Apparatus for synchronizing the speed of a motor to a given precise frequency fp, the motor having a drive circuit which furnishes the motor with the necessary energy for its rotation, the motor delivering a frequency fm proportional to its speed, said apparatus comprising a divider by x having an input receiving a signal of frequency fp and an output at which is produced a signal with a frequency fp/x, a second divider of x + α having an input receiving signals of frequency fm + αy, said second divider having an output at which is produced a signal with a frequency f2, a phase comparator having two states, one of coincidence, the other of non-coincidence, said phase comparator having a first input connected to the output of the first divider and a second input connected to the output of the second divider, said phase comparator having an output connected to the motor drive circuit to interrupt or re-establish the distribution of energy to the motor according to whether the output of the phase comparator is in one state or the other to maintain f2 equal and in phase with f1 and synchronizing fm to a mean value of fp/xy, wherein α, x, and y are whole numbers.
Claim 3
Dependent Claim
26 words
Apparatus as claimed in claim 1 wherein said second divider comprises an OR exclusive gate having one input receiving the output signal from said second divider.
Claim 4
Dependent Claim
32 words
Apparatus as claimed in claim 2 comprising an AND gate having one input receiving the signal of frequency fp and an output connected to a second input of the OR exclusive gate.
Claim 5
Dependent Claim
62 words
Apparatus as claimed in claim 3 comprising a binary counter having an input connected to the motor drive circuit for receiving the signal of frequency fm therefrom, and a flip-flop having one input connected to the output of the binary counter, a second input receiving the signal of frequency fp, and an output connected to a second input of the AND gate.
Claim 6
Dependent Claim
21 words
Apparatus as claimed in claim 4 wherein said binary counter has a second input connected to the output of said flip-flop.
Claim 7
Dependent Claim
230 words
Apparatus for synchronizing the speed of a motor to a given precise frequency fp, the motor having a drive circuit which furnishes the motor with the necessary energy for its rotation, the motor delivering a frequency fm proportional to its speed, said apparatus comprising a first divider for dividing by a whole number x and having an input receiving a signal of frequency fp and an output at which is produced a signal with a frequency fp/x, pulse addition means producing a pulse of the frequency fm + αy where α and y are whole numbers, a second divider for dividing by x + α and having as an input the output of said pulse addition means, said second divider having an output at which is produced a signal with a frequency f2, a phase comparator having two states, one of coincidence, the other of non-coincidence, said phase comparator having a first input connected to the output of the first divider and a second input connected to the output of the second divider, said phase comparator having an output connected to the motor drive circuit to interrupt or re-establish the distribution of energy to the motor according to whether the output of the phase comparator is in one state or the other to maintain f2 equal and in phase with f1 and synchronizing fm to a mean value of fp.
Claim 8
Dependent Claim
230 words
Apparatus for synchronizing the speed of a motor to a given precise frequency fp, the motor having a drive circuit which furnishes the motor with the necessary energy for its rotation, the motor delivering a frequency fm proportional to its speed, said apparatus comprising a first divider for dividing by a whole number x and having an input receiving a signal of frequency fp and an output at which is produced a signal with a frequency fp/x, pulse addition means producing a pulse of the frequency fm + αy where α and y are whole numbers, a second divider for dividing by x + α and having as an input the output of said pulse addition means, said second divider having an output at which is produced a signal with a frequency f2, a phase comparator having two states, one of coincidence, the other of non-coincidence, said phase comparator having a first input connected to the output of the first divider and a second input connected to the output of the second divider, said phase comparator having an output connected to the motor drive circuit to interrupt or re-establish the distribution of energy to the motor according to whether the output of the phase comparator is in one state or the other to maintain f2 equal and in phase with f1 and synchronizing fm to a mean value of fp.
Claim 9
Dependent Claim
26 words
Apparatus as claimed in claim 6 wherein said second divider comprises an OR exclusive gate having one input receiving the output signal from said second divider.
Claim 10
Dependent Claim
32 words
Apparatus as claimed in claim 7 comprising an AND gate having one input receiving the signal of frequency fp and an output connected to a second input of the OR exclusive gate.
Claim 11
Dependent Claim
62 words
Apparatus as claimed in claim 8 comprising a binary counter having an input connected to the motor drive circuit for receiving the signal of frequency fm therefrom, and a flip-flop having one input connected to the output of the binary counter, a second input receiving the signal of frequency fp, and an output connected to a second input of the AND gate.
Claim 12
Dependent Claim
21 words
Apparatus as claimed in claim 9 wherein said binary counter has a second input connected to the output of said flip-flop.
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) | 1980-02-08 | 1980-08-09 | 1981-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-08 | 1984-08-09 | 1985-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-08 | 1988-08-09 | 1989-02-08 | $7700.00 | Window Closed / Lapsed |