Patent US452776A successfully refreshed from Google Patents.
US3553370A
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Phasing system for facsimile transmitter and receiver utilizing pulse generating and counting devices
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1967-12-22
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Granted: 1971-01-05
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Expires: 1987-12-22
Abstract
Abstract A phasing system for two synchronous rotating members, such as the scanning members of the transmitter and receiver of a facsimile system, in which an electronic pulse counter is employed to determine the phase discrepancy between rotating members, and the phase-adjusting means to effect phase correction is controlled by said pulse counter.
Inventors
- 👤 Bernard M Rosenheck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:41
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/32; H04N1/36; H02; H02P; H02P5/00; H02P5/46; H02P5/52
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
102 words
A system For synchronously phasing two rotating members, comprising: means for generating phasing pulses representing the angular positions of the respective members; means for adjusting the angular position of one of said members to effect phase coincidence with the other member; means for generating electrical pulses at a constant rate; means connected to receive said generated phasing pulses and said constant-rate pulses occurring during the interval between a pair of phasing pulses from the two rotating members; and means responsive to the counting means for controlling said adjusting means to the extent determined by said counted constant-rate pulses to effect phase correction.
Claim 2
Independent Claim
102 words
A system For synchronously phasing two rotating members, comprising: means for generating phasing pulses representing the angular positions of the respective members; means for adjusting the angular position of one of said members to effect phase coincidence with the other member; means for generating electrical pulses at a constant rate; means connected to receive said generated phasing pulses and said constant-rate pulses occurring during the interval between a pair of phasing pulses from the two rotating members; and means responsive to the counting means for controlling said adjusting means to the extent determined by said counted constant-rate pulses to effect phase correction.
Claim 3
Dependent Claim
57 words
A phasing system according to claim 1, in which switching means is provided to connect the counting means to said constant-rate pulse generating means upon the occurrence of a phasing pulse from one of said rotating members, and to disconnect said counting means upon the occurrence of a phasing pulse from the other of said rotating members.
Claim 4
Dependent Claim
72 words
A phasing system according to claim 2, in which second switching means is provided to connect the counting means to said constant-rate, pulse-generating means and to connect the constant-rate, pulse-generating means to said means for adjusting upon the occurrence of a phasing pulse from the other of said rotation members and to disconnect said counting and adjusting means when said extent of adjustment is reached as determined by said counted constant-rate pulses.
Claim 5
Independent Claim
140 words
A system for synchronously phasing two rotating members, comprising: means for generating first and second phasing pulses representing the angular positions of the respective members; means for adjusting the angular position of one of said members to effect phase coincidence with the other member; means for generating electrical pulses at a constant rate; means connected to receive said generated first and second phasing pulses and said constant-rate pulses for counting the number of said constant-rate pulses occurring during the interval between said first and second phasing pulses from the two rotating members and for counting thereafter to a predetermined count; and means responsive to said counting means for controlling said adjustment means from said second phasing pulse until said predetermined count is reached for effecting phase correction corresponding to the number of pulses required until said predetermined count is reached.
Claim 6
Independent Claim
140 words
A system for synchronously phasing two rotating members, comprising: means for generating first and second phasing pulses representing the angular positions of the respective members; means for adjusting the angular position of one of said members to effect phase coincidence with the other member; means for generating electrical pulses at a constant rate; means connected to receive said generated first and second phasing pulses and said constant-rate pulses for counting the number of said constant-rate pulses occurring during the interval between said first and second phasing pulses from the two rotating members and for counting thereafter to a predetermined count; and means responsive to said counting means for controlling said adjustment means from said second phasing pulse until said predetermined count is reached for effecting phase correction corresponding to the number of pulses required until said predetermined count is reached.
Claim 7
Independent Claim
137 words
A system for synchronously phasing two rotating members, comprising: means for rotating said members; means for generating phasing pulses representing the angular positions of the respective members; means for adjusting the angular position of one of said rotating members to effect phase coincidence with the other member; a pulse counter for generating an output at a predetermined count; means responsive to said phasing pulse-generating means for stepping said pulse counter to a point representing the amount of phase discrepancy between said rotating members; and second means responsive to said phasing pulse-generating means for stepping said pulse counter to said predetermined count and simultaneously for stepping said means for adjusting to effect phase correction by adjusting the phase relation of one of said rotating members in accordance with the operation of said pulse counter by said second means.
Claim 8
Independent Claim
137 words
A system for synchronously phasing two rotating members, comprising: means for rotating said members; means for generating phasing pulses representing the angular positions of the respective members; means for adjusting the angular position of one of said rotating members to effect phase coincidence with the other member; a pulse counter for generating an output at a predetermined count; means responsive to said phasing pulse-generating means for stepping said pulse counter to a point representing the amount of phase discrepancy between said rotating members; and second means responsive to said phasing pulse-generating means for stepping said pulse counter to said predetermined count and simultaneously for stepping said means for adjusting to effect phase correction by adjusting the phase relation of one of said rotating members in accordance with the operation of said pulse counter by said second means.
Claim 9
Independent Claim
174 words
A system for synchronously phasing two rotating members, comprising: means for generating phasing pulses representing the angular positions of the respective members; means for adjusting the angular position of one of said members to effect phase coincidence with the other member; an electronic pulse counter for generating a control signal at a predetermined count; a pulse source for stepping said counter; first means for connecting said pulse source to said counter in response to a phasing pulse from one of said rotating members; seconD means for connecting said pulse source to said counter and to said means for adjusting in response to the next occurring phasing pulse from the other one of said members thus adjusting said angular position of one of said members in response to said subsequent pulses; and said counter connected to said second means for applying said control signal thereto and disconnecting said pulse source from said counter and said means for adjusting when said predetermined count is reached, thereby adjusting one of said members into synchronization with the other.
Claim 10
Independent Claim
174 words
A system for synchronously phasing two rotating members, comprising: means for generating phasing pulses representing the angular positions of the respective members; means for adjusting the angular position of one of said members to effect phase coincidence with the other member; an electronic pulse counter for generating a control signal at a predetermined count; a pulse source for stepping said counter; first means for connecting said pulse source to said counter in response to a phasing pulse from one of said rotating members; seconD means for connecting said pulse source to said counter and to said means for adjusting in response to the next occurring phasing pulse from the other one of said members thus adjusting said angular position of one of said members in response to said subsequent pulses; and said counter connected to said second means for applying said control signal thereto and disconnecting said pulse source from said counter and said means for adjusting when said predetermined count is reached, thereby adjusting one of said members into synchronization with the other.
Claim 11
Independent Claim
196 words
A system for synchronously phasing two rotating members, comprising: phase pulse-generating means for representing the angular positions of said rotating members; adjusting means for adjusting the angular position of one of said members to effect phase synchronization with the other member; pulse counting means for generating an output signal at a predetermined count; a source of pulses for generating pulses at high and lower rates; first switching means for connecting said source of high-rate pulses to pulse said counter means in response to a phase pulse from one of said rotating members; second switching means for connecting said source of lower rate pulses to pulse said counter means and to pulse said adjusting means in response to a second phase pulse from the second of said rotating members, said lower rate pulses thus energizing said adjusting means for adjusting said angular position of one of said members; said counting means connected to said second switching means for disconnecting said source of lower rate pulses from said adjusting means and terminating the adjustment of the angular position of one of said members when said predetermined count is reached, thus synchronizing one of said members with the other.
Claim 12
Independent Claim
196 words
A system for synchronously phasing two rotating members, comprising: phase pulse-generating means for representing the angular positions of said rotating members; adjusting means for adjusting the angular position of one of said members to effect phase synchronization with the other member; pulse counting means for generating an output signal at a predetermined count; a source of pulses for generating pulses at high and lower rates; first switching means for connecting said source of high-rate pulses to pulse said counter means in response to a phase pulse from one of said rotating members; second switching means for connecting said source of lower rate pulses to pulse said counter means and to pulse said adjusting means in response to a second phase pulse from the second of said rotating members, said lower rate pulses thus energizing said adjusting means for adjusting said angular position of one of said members; said counting means connected to said second switching means for disconnecting said source of lower rate pulses from said adjusting means and terminating the adjustment of the angular position of one of said members when said predetermined count is reached, thus synchronizing one of said members with the other.
Claim 13
Dependent Claim
78 words
A phasing system according to claim 7, wherein said adjusting means comprises: stepping motor means connected to said second switching means for receiving said lower rate pulses therefrom; drive motor means having a stator and rotor for driving one of said rotating members; and said stepping motor means connected to said drive motor means for causing the rotation of said stator for advancing the rotor of said drive motor during each of said lower rate pulses received thereby.
Claim 14
Dependent Claim
62 words
A phasing system according to claim 7, wherein said first switching means comprises: first and second gating means serially connected to one of said rotating members for generating a control signal in response to said phase pulse therefrom; and third gating means connected to receive said control signal from said second gating means for passing said high-rate pulses to said counter means.
Claim 15
Dependent Claim
97 words
A phasing system according to claim 9, wherein said second switching means comprises: said second gating means also connected to said second rotating member for generating a second control signal in response to said phase pulse therefrom which disables said third gating means; fourth gating means connected to said second gate means for generating a control signal in response to said second control signal from said second gate; and fifth gating means connected to receive said control signal from said fourth gating means for passing said lower rate pulses to said counter means and said adjustable means.
References Cited (Backward Citations)
US3367110A
Cited
US3368108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |