Patent US3731177A successfully refreshed from Google Patents.
US3731177A
Expired / Lapsed
US
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Disc file head movement control system
Assignee: International Business Machines Corp
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Filing: 1971-12-15
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Granted: 1973-05-01
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Expires: 1991-12-15
Abstract
Abstract According to the present invention a movement control system comprises a motor for moving said body into a required position, a motor control unit for controlling the acceleration and deceleration of said motor, a position indicator unit producing positioning signals corresponding to movement of said body while accelerating toward said required position, and a calculating unit responsive to position data representing said required position and to said positioning signals to produce a control signal for said motor control unit to change from acceleration to deceleration in order to provide required speed/position characteristics for the movement of said body.
Inventors
- 👤 R Commander
- 👤 J Dixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:08
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/21; G05B19/23; G11; G11B; G11B5/00; G11B5/48; G11B5/54; G11B5/55; G11B5/5521; G11B5/5526; G11B5/553; G11B5/5547
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
171 words
A movement control system for controlling the movement of a body comprising: a motor for moving said body into a required position; a motor control unit for controlling the acceleration and deceleration of said motor; a position indicator unit for providing a positioning signal for each unit distance of movement of said body; a calculating unit for initially receiving the number of unit distances said body is to be moved and for continuously receiving said positioning signals, said calculating unit comprising a changeover counter; a first control means connected to said changeover counter for generating rate signals for stepping said changeover counter, the rate of occurrence of said rate signals being a function of the number of positioning signals received by said calculating unit and the number of unit distances initially received by said calculating unit; a second control means for generating a deceleration signal when said changeover counter reaches a first predetermined count, said deceleration signal being applied to said motor control unit for initiating the deceleration of said motor.
Claim 2
Dependent Claim
171 words
A movement control system for controlling the movement of a body comprising: a motor for moving said body into a required position; a motor control unit for controlling the acceleration and deceleration of said motor; a position indicator unit for providing a positioning signal for each unit distance of movement of said body; a calculating unit for initially receiving the number of unit distances said body is to be moved and for continuously receiving said positioning signals, said calculating unit comprising a changeover counter; a first control means connected to said changeover counter for generating rate signals for stepping said changeover counter, the rate of occurrence of said rate signals being a function of the number of positioning signals received by said calculating unit and the number of unit distances initially received by said calculating unit; a second control means for generating a deceleration signal when said changeover counter reaches a first predetermined count, said deceleration signal being applied to said motor control unit for initiating the deceleration of said motor.
Claim 3
Dependent Claim
72 words
A movement control system as set forth in claim 1 wherein said first control means alters the contents of said changeover counter at a rate which is in a nonlinear inverse proportional relationship to the instantaneous number of said unit distances still to be moved by said body, said changeover counter reaching said first predetermined count prior to the time that said body has reached a position represented by said predetermined count.
Claim 4
Dependent Claim
57 words
A movement control system as set forth in claim 2 wherein said calculating unit further includes a unit distance counter for initially being set to said number of unit distances said body is to be moved as received by said calculating unit and for being decremented once for each said positioning signal received by said calculating unit.
Claim 5
Dependent Claim
65 words
A movement control system as set forth in claim 2 wherein said calculating unit further includes a loading means for setting the initial state of said changeover counter to the initial number of unit distances and said changeover counter is decremented once for each said positioning signal received by said calculating unit and once for each said rate signal received from said first control means.
Claim 6
Dependent Claim
41 words
A movement control system as set forth in claim 2 wherein said calculating unit further includes a first detecting means connected between said changeover counter and said second control means for setting said first predetermined count to a value of zero.
Claim 7
Dependent Claim
41 words
A movement control system as set forth in claim 4 wherein said calculating unit further includes a first detecting means connected between said changeover counter and said second control means for setting said first predetermined count to a value of zero.
Claim 8
Dependent Claim
65 words
A movement control system as set forth in claim 3 wherein said calculating unit further includes a loading means for setting the initial state of said changeover counter to the initial number of unit distances and said changeover counter is decremented once for each said positioning signal received by said calculating unit and once for each said rate signal received from said first control means.
Claim 9
Dependent Claim
41 words
A movement control system as set forth in claim 3 wherein said calculating unit further includes a first detecting means connected between said changeover counter and said second control means for setting said first predetermined count to a value of zero.
Claim 10
Dependent Claim
41 words
A movement control system as set forth in claim 7 wherein said calculating unit further includes a first detecting means connected between said changeover counter and said second control means for setting said first predetermined count to a value of zero.
Claim 11
Dependent Claim
46 words
A movement control system as set forth in claim 4, wherein said calculating unit further comprises a count biasinG means connected to said changeover counter for altering the initial state of said changeover counter from the value set in said changeover counter by said loading means.
Claim 12
Dependent Claim
46 words
A movement control system as set forth in claim 6 wherein said calculating unit further comprises a count biasing means connected to said changeover counter for altering the initial state of said changeover counter from the value set in said changeover counter by said loading means.
Claim 13
Dependent Claim
46 words
A movement control system as set forth in claim 7 wherein said calculating unit further comprises a count biasing means connected to said changeover counter for altering the initial state of said changeover counter from the value set in said changeover counter by said loading means.
Claim 14
Dependent Claim
46 words
A movement control system as set forth in claim 9 wherein said calculating unit further comprises a count biasing means connected to said changeover counter for altering the initial state of said changeover counter from the value set in said changeover counter by said loading means.
Claim 15
Dependent Claim
54 words
A movement control system as set forth in claim 3 wherein said calculating unit further comprises a third control means for generating a stop signal when the value of said unit distance counter is equal to a second predetermined count, said stop signal being applied to said motor control unit for stopping said motor.
Claim 16
Dependent Claim
41 words
A movement control system as set forth in claim 14 wherein said calculating unit further comprises a second detecting means connected between said unit distance counter and said third control means for setting said predetermined count to a value of one.
Claim 17
Dependent Claim
54 words
A movement control system as set forth in claim 7 wherein said calculating unit further comprises a third control means for generating a stop signal when the value of said unit distance counter is equal to a second predetermined count, said stop signal being applied to said motor control unit for stopping said motor.
Claim 18
Dependent Claim
41 words
A movement control system as set forth in claim 16 wherein said calculating unit further comprises a second detecting means connected between said unit distance counter and said third control means for setting said predetermined count to a value of one.
Claim 19
Dependent Claim
54 words
A movement control system as set forth in claim 8 wherein said calculating unit further comprises a third control means for generating a stop signal when the value of said unit distance counter is equal to a second predetermined count, said stop signal being applied to said motor control unit for stopping said motor.
Claim 20
Dependent Claim
41 words
A movement control system as set forth in claim 18 wherein said calculating unit further comprises a second detecting means connected between said unit distance counter and said third control means for setting said predetermined count to a value of one.
Claim 21
Dependent Claim
54 words
A movement control system as set forth in claim 9 wherein said calculating unit further comprises a third control means for generating a stop signal when the value of said unit distance counter is equal to a second predetermined count, said stop signal being applied to said motor control unit for stopping said motor.
Claim 22
Dependent Claim
41 words
A movement control system as set forth in claim 20 wherein said calculating unit further comprises a second detecting means connected between said unit distance counter and said third control means for setting said predetermined count to a value of one.
Claim 23
Dependent Claim
54 words
A movement control system as set forth in claim 12 wherein said calculating unit further comprises a third control means for generating a stop signal when the value of said unit distance counter is equal to a second predetermined count, said stop signal being applied to said motor control unit for stopping said motor.
Claim 24
Dependent Claim
41 words
A movement control system as set forth in claim 22 wherein said calculating unit further comprises a second detecting means connected between said unit distance counter and said third control means for setting said predetermined count to a value of one.
Claim 25
Dependent Claim
54 words
A movement control system as set forth in claim 13 wheRein said calculating unit further comprises a third control means for generating a stop signal when the value of said unit distance counter is equal to a second predetermined count, said stop signal being applied to said motor control unit for stopping said motor.
Claim 26
Dependent Claim
41 words
A movement control system as set forth in claim 24 wherein said calculating unit further comprises a second detecting means connected between said unit distance counter and said third control means for setting said predetermined count to a value of one.
Claim 27
Dependent Claim
77 words
A movement control system as set forth in claim 1 wherein said first control means alters the contents of said changeover counter at a rate which is in a nonlinear direct proportional relationship to the instantaneous number of said unit distances already moved by said body, said changeover counter obtaining said first predetermined count, the value of said predetermined count being a function of the magnitude of number of unit distances initially received by said calculating unit.
Claim 28
Dependent Claim
57 words
A movement control system as set forth in claim 26 wherein said calculating unit further includes a unit distance counter for initially being set to said number of unit distances said body is to be moved as received by said calculating unit and for being decremented once for each said positioning signal received by said calculating unit.
Claim 29
Dependent Claim
32 words
A movement control system as set forth in claim 27 wherein said changeover counter is incremented once for each said rate pulse received by said changeover counter from said first control means.
Claim 30
Dependent Claim
60 words
A movement control system as set forth in claim 28 wherein said second control means comprises a comparator for comparing the contents of said changeover counter and said unit distance counter, said second control means generating said deceleration signal when said comparator indicates that the contents of said changeover counter and said unit distance counter are equal to one another.
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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |