US3906313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plural motor synchronizing apparatus
Assignee: Individual
•
Filing: 1973-12-03
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Granted: 1975-09-16
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Expires: 1993-12-03
Abstract
Abstract A synchronization system for a plurality of machines includes sensors which produce signals indicative of the positions of their respective machines. The sensor output signals are coupled to a differentiator that deenergizes a master relay for shutting down the machines when an asynchronous condition occurs. The differentiator output signal is also employed to activate a bypass circuit or circuits which supply power to move the lagging machine or machines until a synchronized condition is restored, and then normal operation will resume.
Inventors
- 👤 Roger P Danis
- 👤 Legal Representative By Danis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:27
CPC Classifications
H; H02; H02P; H02P5/00; H02P5/46; H02P5/52; H02P5/56
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
242 words
A system for automatically correcting an asynchronous condition between synchronously operating machines, said system comprising: a. at least two synchronously operating machines each having its own power supply circuit; b. a contact means in each of the power supply circuits of said machines, each of said contact means normally closed to supply power to said machines and openable to interrupt power thereto, said contact means coupled for ganged operation; c. a by-pass circuit for each of the power supply circuits of said machines and each connected thereto in parallel with the one of said contact means therein, each of said by-pass circuits being normally open; d. monitoring means coupled to sense the synchronous operation of said machines and for opening said contact means of each of the power supply circuits upon the occurrence of an asynchronous condition, and for simultaneously producing an output signal indicative of one of said machines lagging and applying that output signal to the particular one of said bypass circuits which is connected to the power supply circuit of the lagging one of said machines, said monitoring means adapted to return said contact means to their normally closed state when synchronous operation of said machines is restored; and e. means within each of said by-pass circuits for responding to the output signal from said monitoring means by closing said by-pass circuit to supply power to the lagging one of said machines until a synchronous operating condition is restored.
Claim 2
Independent Claim
242 words
A system for automatically correcting an asynchronous condition between synchronously operating machines, said system comprising: a. at least two synchronously operating machines each having its own power supply circuit; b. a contact means in each of the power supply circuits of said machines, each of said contact means normally closed to supply power to said machines and openable to interrupt power thereto, said contact means coupled for ganged operation; c. a by-pass circuit for each of the power supply circuits of said machines and each connected thereto in parallel with the one of said contact means therein, each of said by-pass circuits being normally open; d. monitoring means coupled to sense the synchronous operation of said machines and for opening said contact means of each of the power supply circuits upon the occurrence of an asynchronous condition, and for simultaneously producing an output signal indicative of one of said machines lagging and applying that output signal to the particular one of said bypass circuits which is connected to the power supply circuit of the lagging one of said machines, said monitoring means adapted to return said contact means to their normally closed state when synchronous operation of said machines is restored; and e. means within each of said by-pass circuits for responding to the output signal from said monitoring means by closing said by-pass circuit to supply power to the lagging one of said machines until a synchronous operating condition is restored.
Claim 3
Dependent Claim
157 words
A system for automatically correcting an asynchronous condition between synchronously operating machines as claimed in claim 1 wherein said monitoring means comprises: a. a sensor for each of said machines, each of said sensors coupled to its respective one of said machines for sensing the position thereof and producing an output signal indicative of that position; b. a differentiator coupled to receive the output signals from said sensors and produce a power interrupt signal upon the occurrence of an asynchronous condition Between said machines and simultaneously produce the output signal indicative of one of said machines lagging; and c. a master relay coupled to receive the power interrupt signal from said differentiator, said master relay operatively ganged to said contact means in the power supply of each of said machines for opening said contact means upon receipt of the power interrupt signal and closing said contact means upon termination of the power interrupt signal from said differentiator.
Claim 4
Dependent Claim
43 words
A system for automatically correcting an asynchronous condition between synchronously operating machines as claimed in claim 1 wherein each of said by-pass circuits include a normally open relay which is closed when said by-pass circuit receives the output signal from said monitoring means.
Claim 5
Dependent Claim
75 words
A system for automatically correcting an asynchronous condition between synchronously operating machines as claimed in claim 1 wherein each of said by-pass circuits comprises: a. an amplifier circuit biased to a non-conducting state and adapted to be rendered conductive when a signal is applied thereto; and b. a relay coupled to said amplifier, said relay being open when said amplifier is non-conductive and will move to the closed position when said amplifier is rendered conductive.
Claim 6
Dependent Claim
118 words
A system for automatically correcting an asynchronous condition between synchronously operating machines as claimed in claim 1 wherein each of said by-pass circuits comprises: a. a normally open relay; b. a vacuum tube having its plate coupled to the coil of said relay so that no current will flow through the coil when said tube is not conducting and current will flow through the coil of said relay for closing thereof when said tube is conducting; c. means connected to said tube for biasing thereof in the non-conducting state; and d. means for coupling the output signal from said monitoring means to the grid of said vacuum tube to overcome the biasing thereof and render said tube conductive.
Claim 7
Dependent Claim
115 words
A system for automatically correcting an asynchronous condition between synchronously operating machines as claimed in claim 1 wherein each of said by-pass circuits comprise: a. a normally open relay; b. a transistor having its collector coupled to the coil of said relay so that no current will flow through the coil when said transistor is non-conductive and current will flow through the coil of said relay for closing thereof when said transistor is conducting; c. means connected to said transistor for biasing thereof in a non-conducting state; and d. means for coupling the output signal from said monitoring means to the base of said transistor to overcome the biasing thereof and render said transistor conductive.
References Cited (Backward Citations)
US2848671A
Cited
US3024395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |