Patent US4017036A successfully refreshed from Google Patents.
US4017036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of the linear speed of the web
Assignee: Individual
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Filing: 1975-07-08
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Granted: 1977-04-12
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Expires: 1995-07-08
Abstract
Abstract This invention is concerned with providing means which control the linear speed of a web travelling from a source of that web to a take-up spool and is particularly associated with ensuring that the linear speed of travel of the web from the one source to the take-up is maintained constant. The invention therefore has application to the textile trade where a web of textile material may be passed through a dye bath and it is desirable to ensure that all parts of the web are immersed in the dye bath for the same length of time. The invention includes means for sensing the speed of travel of the web and comparing it against a known reference speed and by comparing the two speeds providing a positive or negative signal which is fed to apparatus which then increases or reduces the speed of travel of the web in order to maintain it constant.
Inventors
- 👤 Emile Bernard Bates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:11
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/18; B65H23/1806
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
183 words
Apparatus for controlling the linear speed of a web travelling from a supply to a take-up, comprising drive means for advancing the web from said supply to said take-up; sensing means for sensing the actual speed of the advancing web; comparing means for making a comparison of the sensed actual speed with a reference speed, including a first shaft which is adapted to rotate in dependence upon the actual speed of the web, a second shaft, a synchronous motor rotating said second shaft at said reference speed and in the same direction as said first shaft, and means for determining relative angular displacement of said shafts including a disk on each of said shafts and rotatable therewith, a first electrical contact on one and a pair of second electrical contacts on the other of said disks, said first contact being arranged to engage one of said second contacts in response to relative circumferential displacement of said disks; and adjusting means for adjusting the operation of said drive means in accordance with the engagement of said first contact with either of said second contacts.
Claim 2
Dependent Claim
183 words
Apparatus for controlling the linear speed of a web travelling from a supply to a take-up, comprising drive means for advancing the web from said supply to said take-up; sensing means for sensing the actual speed of the advancing web; comparing means for making a comparison of the sensed actual speed with a reference speed, including a first shaft which is adapted to rotate in dependence upon the actual speed of the web, a second shaft, a synchronous motor rotating said second shaft at said reference speed and in the same direction as said first shaft, and means for determining relative angular displacement of said shafts including a disk on each of said shafts and rotatable therewith, a first electrical contact on one and a pair of second electrical contacts on the other of said disks, said first contact being arranged to engage one of said second contacts in response to relative circumferential displacement of said disks; and adjusting means for adjusting the operation of said drive means in accordance with the engagement of said first contact with either of said second contacts.
Claim 3
Dependent Claim
177 words
Apparatus for controlling the linear speed of a web travelling from a supply to a take-up, drive means for advancing the web from said supply to said take-up; sensing means for sensing the actual speed of the advancing web; comparing means for making a comparison of the sensed actual speed with a reference speed, including a first shaft which is adapted to rotate in dependence upon the actual speed of the web, a second shaft, a synchronous motor rotating said second shaft at said reference speed and in the same direction as said first shaft, and means for determining relative angular displacement of said shafts including a disk on each of said shafts and rotatable therewith, a first electrical contact on one and at least one second electrical contact on the other of said disks and arranged to engage one another in response to relative circumferential displacement of said disks; and adjusting means for adjusting the operation of said drive means in accordance with the engagement of said first contact with said at least one second contact.
Claim 4
Dependent Claim
177 words
Apparatus for controlling the linear speed of a web travelling from a supply to a take-up, drive means for advancing the web from said supply to said take-up; sensing means for sensing the actual speed of the advancing web; comparing means for making a comparison of the sensed actual speed with a reference speed, including a first shaft which is adapted to rotate in dependence upon the actual speed of the web, a second shaft, a synchronous motor rotating said second shaft at said reference speed and in the same direction as said first shaft, and means for determining relative angular displacement of said shafts including a disk on each of said shafts and rotatable therewith, a first electrical contact on one and at least one second electrical contact on the other of said disks and arranged to engage one another in response to relative circumferential displacement of said disks; and adjusting means for adjusting the operation of said drive means in accordance with the engagement of said first contact with said at least one second contact.
Claim 5
Dependent Claim
39 words
Apparatus as defined in claim 2, wherein said determining means further comprises conductive means, including stationary terminals, and slip ring means mounted on the respective shafts for rotation therewith and operative for connecting said contacts to the respective terminals.
Claim 6
Dependent Claim
55 words
Apparatus as defined in claim 2, said drive means comprising a motor; and wherein said adjusting means comprises a variable-speed gearing having an input shaft driven by said motor, and an output shaft, and means for varying the gear ratio between said input shaft and said output shaft according to the results of said comparison.
Claim 7
Dependent Claim
13 words
Apparatus as defined in claim 4, wherein said varying means comprises a micro-motor.
Claim 8
Dependent Claim
202 words
Apparatus for controlling the linear speed of a web travelling from a supply to a take-up, drive means for advancing the web from said supply to said take-up; sensing means for sensing the actual speed of the advancing web; comparing means for making a comparison of the sensed actual speed with a reference speed, including a first shaft which is adapted to rotate in dependence upon the actual speed of the web, a second shaft, a synchronous motor rotating said second shaft at said reference speed and in the same direction as said first shaft, and means for determining relative angular displacement of said shafts including a disk on each of said shafts and rotatable therewith, a pair of circumferentially spaced electrical contacts on one of said disks, and another electrical contact on the other of said disks and located intermediate the contacts of said pair when said actual and reference speeds coincide, said other contact being adapted to engage a contact of said pair when said actual and reference speeds deviate from one another; and adjusting means for adjusting the operation of said drive means in accordance with the engagement of said other contact with one of said pair of contacts.
Claim 9
Dependent Claim
202 words
Apparatus for controlling the linear speed of a web travelling from a supply to a take-up, drive means for advancing the web from said supply to said take-up; sensing means for sensing the actual speed of the advancing web; comparing means for making a comparison of the sensed actual speed with a reference speed, including a first shaft which is adapted to rotate in dependence upon the actual speed of the web, a second shaft, a synchronous motor rotating said second shaft at said reference speed and in the same direction as said first shaft, and means for determining relative angular displacement of said shafts including a disk on each of said shafts and rotatable therewith, a pair of circumferentially spaced electrical contacts on one of said disks, and another electrical contact on the other of said disks and located intermediate the contacts of said pair when said actual and reference speeds coincide, said other contact being adapted to engage a contact of said pair when said actual and reference speeds deviate from one another; and adjusting means for adjusting the operation of said drive means in accordance with the engagement of said other contact with one of said pair of contacts.
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) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |