US3863241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A yarn break detector utilizing a sensor for sensing the yarn static electricity
Assignee: Azbil Corp
•
Filing: 1973-03-26
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Granted: 1975-01-28
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Expires: 1993-03-26
Abstract
Abstract A yarn break detector of the sampling type has a collecting electrode type sensor to which a continuously moving yarn is lightly contacted. Current, based on charges of static electricity generated by the sensor, flow through a DC to pulse converter so as to be converted to a corresponding voltage which in turn is converted to a pulse signal when a sampling switch of the DC to pulse converter is closed. The pulse amplitude of the converted pulse is changed depending upon the presence or absence of the yarn to be monitored. Said converted pulse signal is then transmitted to a signal handling circuit which detects a predetermined pulse signal relating to the absence of the yarn and amplifies it so as to operate a load such as an alarm, thereby detecting the condition that the yarn has broken.
Inventors
- 👤 Masaru Kamiyamaguchi
- 👤 Kazuyoshi Nakagawa
- 👤 Masana Nishimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:31
CPC Classifications
B; B65; B65H; B65H63/00; B65H63/02; B65H63/024; B65H63/028; B65H63/032; B65H63/0321; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
124 words
A yarn break detector of the sampling type comprising; a collecting electrode type sensor to which a continuously moving yarn is lightly contacted, a DC to pulse converter including a current to voltage converter connected to the sensor so as to convert the current resulting from the collection of the static electricity by the sensor to a voltage and a sampling switch connected to the current to voltage converter so that the DC to pulse converter produces an output pulse signal on its output terminal when said sampling switch is closed, a check pulse generator for closing said sampling switch, and a signal handling circuit for processing said output pulse signal so as to operate a load if the yarn being monitored has broken.
Claim 2
Dependent Claim
124 words
A yarn break detector of the sampling type comprising; a collecting electrode type sensor to which a continuously moving yarn is lightly contacted, a DC to pulse converter including a current to voltage converter connected to the sensor so as to convert the current resulting from the collection of the static electricity by the sensor to a voltage and a sampling switch connected to the current to voltage converter so that the DC to pulse converter produces an output pulse signal on its output terminal when said sampling switch is closed, a check pulse generator for closing said sampling switch, and a signal handling circuit for processing said output pulse signal so as to operate a load if the yarn being monitored has broken.
Claim 3
Dependent Claim
80 words
A yarn break detector as defined in claim 1 wherein said current to voltage converter comprises a resistor and a capacitor connected in parallel for receiving a charging current resulting from the collection of the static electricity by the sensor and converting said current to a voltage signal and wherein said sampling switch converts the voltage signal to a corresponding pulse signal the amplitude of which changes in accordance with the presence or absence of a yarn to be monitored.
Claim 4
Dependent Claim
58 words
A yarn break detector as defined in claim 1 wherein said signal handling circuit comprises a comparator of low input impedence having an input for receiving said output pulse signal, a memory circuit having an input connected to the output of said comparator and an output, and an output circuit connected to said output of said memory circuit.
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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) | 1978-01-27 | 1978-07-29 | 1979-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-27 | 1982-07-29 | 1983-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-27 | 1986-07-29 | 1987-01-28 | $7700.00 | Window Closed / Lapsed |