US3890810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for monitoring a thread or the like
Assignee: Loepfe AG Gebrueder
•
Filing: 1974-03-18
•
Granted: 1975-06-24
•
Expires: 1994-03-18
Abstract
Abstract An apparatus for monitoring the travel and tension of a thread or the like preferably at a textile machine, comprising a guide element which is held by a counter force against a tension force normally exerted by the thread in a position in which the thread is in contact with the guide element, but upon the presence of an impermissibly high tension force releases the thread. The guide element is equipped with a mechanical-electrical transducer possessing a contact body, the transducer, upon release of the thread from the contact body or upon standstill of the thread, generating an electrical signal serving to trigger a control operation or an indicating operation.
Inventors
- 👤 Rene Domig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:59
CPC Classifications
D; D04; D04B; D04B35/00; D04B35/10; D04B35/12; B; B65; B65H; B65H63/00; B65H63/02; B65H63/024; B65H63/028; B65H63/032; B65H63/0321; B65H63/0327; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
137 words
An apparatus for monitoring the travel and tension of a thread or the like preferably at a textile machine, comprising a guide element, means for holding the guide element by means of a counter force against a tension force normally exerted by the thread in a position in which the thread is in contact with the guide element, but in the presence of an impermissibly high tension force prevailing at the thread said guide element releases the thread, said guide element being equipped with a tribo-electric transducer, said tribo-electric transducer embodying a substantially elongate contact body equipped with a lengthwise bore and an electrode arranged in said lengthwise bore, said tribo-electric transducer upon release of the thread from the contact body or upon standstill of the thread generating an electrical signal serving to trigger a predetermined operation.
Claim 2
Independent Claim
137 words
An apparatus for monitoring the travel and tension of a thread or the like preferably at a textile machine, comprising a guide element, means for holding the guide element by means of a counter force against a tension force normally exerted by the thread in a position in which the thread is in contact with the guide element, but in the presence of an impermissibly high tension force prevailing at the thread said guide element releases the thread, said guide element being equipped with a tribo-electric transducer, said tribo-electric transducer embodying a substantially elongate contact body equipped with a lengthwise bore and an electrode arranged in said lengthwise bore, said tribo-electric transducer upon release of the thread from the contact body or upon standstill of the thread generating an electrical signal serving to trigger a predetermined operation.
Claim 3
Dependent Claim
15 words
The apparatus as defined in claim 1, wherein said predetermined operation is a control operation.
Claim 4
Dependent Claim
15 words
The apparatus as defined in claim 1, wherein said predetermined operation is an indicating operation.
Claim 5
Dependent Claim
46 words
The apparatus as defined in claim 1, further including a stationary component, said guide element comprising a support arm, means for pivotably mounting the support arm at the stationary component, and said holding means incorporating a spring for retaining the support arm in a work position.
Claim 6
Dependent Claim
50 words
The apparatus as defined in claim 1, further including a housing having a component, and means for mounting the guide element at said housing component, said transducer having at least one electrode, an electronic unit housed at said housing and connected with said at least one electrode of the transducer.
Claim 7
Dependent Claim
17 words
The apparatus as defined in claim 5, wherein said housing is provided with an adjustable tensioning device.
Claim 8
Independent Claim
153 words
An apparatus for monitoring the travel and tension of a thread or the like preferably at a textile machine, comprising a guide element, means for holding the guide element by means of a counter force against a tension force normally exerted by the thread in a position in which the thread is in contact with the guide element, but in the presence of an impermissibly high tension force prevailing at the thread said guide element releases the thread, said guide element being equipped with a piezoelectric transducer possessing a contact body, a substantially U-shaped flexed holding bracket formed of resilient material, said holding bracket having a pair of legs, said piezoelectric transducer further including a piezoelectric element arranged between the legs of said holding bracket, said piezoelectric transducer upon release of the thread from the contact body or upon standstill of the thread generating an electrical signal serving to trigger a predetermined operation.
Claim 9
Independent Claim
153 words
An apparatus for monitoring the travel and tension of a thread or the like preferably at a textile machine, comprising a guide element, means for holding the guide element by means of a counter force against a tension force normally exerted by the thread in a position in which the thread is in contact with the guide element, but in the presence of an impermissibly high tension force prevailing at the thread said guide element releases the thread, said guide element being equipped with a piezoelectric transducer possessing a contact body, a substantially U-shaped flexed holding bracket formed of resilient material, said holding bracket having a pair of legs, said piezoelectric transducer further including a piezoelectric element arranged between the legs of said holding bracket, said piezoelectric transducer upon release of the thread from the contact body or upon standstill of the thread generating an electrical signal serving to trigger a predetermined operation.
Claim 10
Dependent Claim
34 words
The apparatus as defined in claim 7, further including a stationary component, said guide element including means imparting thereto a resilient construction, and means for fixedly mounting said guide element at the stationary component.
Claim 11
Dependent Claim
27 words
The apparatus as defined in claim 7, said guide element including a support arm, and means for resiliently arranging the contact body relative to the support arm.
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) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |