US3749331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tension reference signal generation means for reel drives
Assignee: General Electric Co
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Filing: 1971-11-30
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Granted: 1973-07-31
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Expires: 1991-11-30
Abstract
Abstract Static circuit means is provided for generating a tension reference signal in response to an input signal proportional to the diameter of strip material on a reel, the tension reference signal having a magnitude defined by T A + BD where T is the magnitude of the reference signal, D is the magnitude of the diameter signal, and A and B are constants having an interrelationhip defined by B R - RA/10 where R is the buildup ratio of the reel, the build-up ratio being the ratio of the maximum (full) reel diameter to the minimum (empty) reel diameter.
Inventors
- 👤 R Nedreski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:18
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/18; B65H23/195; B65H23/198
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
180 words
In strip material handling apparatus including a reel upon which strip material may be wound and unwound, the reel having a build-up ratio R equal to the ratio of the maximum (full) reel diameter to the minimum (empty) reel diameter, variable speed motor drive means for driving the reel, and motor control means responsive to control signals including a reference signal for varying the tension under which the strip material is wound onto the reel in accordance with variations in the reference signal, reference signal generation means comprising: means for generating a diameter signal proportional to the diameter of the reel, and static circuit means coupled to said diameter signal generation means for receiving said diameter signal therefrom, said static circuit means being responsive to said diameter signal to generate a reference signal having a magnitude defined by: T A + BD where T is the magnitude of the reference signal, D is the magnitude of the diameter signal, and A and B are constants having an interrelationship defined by: B R - RA/10 where R is the build-up ratio.
Claim 2
Dependent Claim
180 words
In strip material handling apparatus including a reel upon which strip material may be wound and unwound, the reel having a build-up ratio R equal to the ratio of the maximum (full) reel diameter to the minimum (empty) reel diameter, variable speed motor drive means for driving the reel, and motor control means responsive to control signals including a reference signal for varying the tension under which the strip material is wound onto the reel in accordance with variations in the reference signal, reference signal generation means comprising: means for generating a diameter signal proportional to the diameter of the reel, and static circuit means coupled to said diameter signal generation means for receiving said diameter signal therefrom, said static circuit means being responsive to said diameter signal to generate a reference signal having a magnitude defined by: T A + BD where T is the magnitude of the reference signal, D is the magnitude of the diameter signal, and A and B are constants having an interrelationship defined by: B R - RA/10 where R is the build-up ratio.
Claim 3
Dependent Claim
47 words
Reference signal generation means as defined by claim 1 in which said static circuit means includes means for maintaining the constant A equal to or greater than 10, whereby said reference signal remains constant or decreases with increases in the diameter of strip material on the reel.
Claim 4
Dependent Claim
122 words
Reference signal generation means as defined by claim 1 in which said static circuit means further comprises: amplifying means coupled to a first source of potential and a second source of potential proportional to the constant A and responsive thereto to generate at an output thereof a signal proportional to the constant B, multiplication means having a first input coupled to receive the diameter signal and a second input coupled to receive the output of said amplifying means and being responsive thereto to generate at an output thereof a signal proportional to the product BD, and summing means coupled to said second source of potential and to said output of said multiplication means and being responsive thereto to generate said reference signal.
Claim 5
Dependent Claim
66 words
Reference signal generation means as defined by claim 3 in which said amplifying means operates on signals received from said first source of potential and said second source of potential with relative gains of RV''/10V and R/10, respectively, where V is the voltage of said first source of potential and V'' is the voltage of said second source corresponding to the constant A equal to 10.
Claim 6
Dependent Claim
40 words
Reference signal generation means as defined by claim 4 in which said amplifying means includes means for adjusting the gains of said amplifying means so as to accommodate variations in build-up ratio and voltage of said first source of potential.
Claim 7
Dependent Claim
47 words
Reference signal generation means as defined by claim 5 in which said static circuit means includes means for maintaining the constant A equal to or greater than 10, whereby said reference signal remains constant or decreases with increases in the diameter of strip material on the reel.
Claim 8
Dependent Claim
56 words
Reference signal generation means as defined by claim 3 further comprising said second source of potential, the voltage of said second source of potential being sufficient to maintain the constant A equal to or greater than 10, whereby said reference signal remains constant or decreases with increases in the diameter of strip material or the reel.
Claim 9
Dependent Claim
38 words
Reference signal generation means as defined by claim 7 fUrther comprising means for adjusting the voltage of said second source of potential so as to vary the rate at which strip tension changes with respect to reel diameter.
Claim 10
Dependent Claim
28 words
Reference signal generation means as defined by claim 8 wherein said summing means provides amplification of signals received from said multiplication means and said second source of potential.
Claim 11
Dependent Claim
65 words
Reference signal generation means as defined by claim 9 in which said amplifying means operates on signals received from said first source of potential and said second source of potential with gains of RV''/10V and R/10, respectively, where V is the voltage of said first source of potential and V'' is the voltage of said second source corresponding to the constant A equal to 10.
Claim 12
Dependent Claim
40 words
Reference signal generation means as defined by claim 10 in which said amplifying means includes means for adjusting the gains of said amplifying means so as to accommodate variations in build-up ratio and voltage of said first source of potential.
Claim 13
Dependent Claim
46 words
Reference signal generation means as defined in claim 11 in which said static circuit includes means for maintaining the constant A equal to or greater than 10, whereby said reference signal remains constant or decreases with increases in the diameter of strip material on the reel.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |