GB887547A - Improvements relating to the detection and removal of defective spontaneous cross section variation in textile material - Google Patents
Improvements relating to the detection and removal of defective spontaneous cross section variation in textile materialInfo
- Publication number
- GB887547A GB887547A GB21610/60A GB2161060A GB887547A GB 887547 A GB887547 A GB 887547A GB 21610/60 A GB21610/60 A GB 21610/60A GB 2161060 A GB2161060 A GB 2161060A GB 887547 A GB887547 A GB 887547A
- Authority
- GB
- United Kingdom
- Prior art keywords
- trigger
- output
- network
- pair
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
- B65H63/06—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to presence of irregularities in running material, e.g. for severing the material at irregularities ; Control of the correct working of the yarn cleaner
- B65H63/062—Electronic slub detector
- B65H63/064—Electronic slub detector using capacitor sensing means, i.e. the defect signal is a variation of impedance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Quality & Reliability (AREA)
- Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
Abstract
887,547. Testing yarns &c. ZELLWEGER Ltd. June 20, 1960 [Sept. 11, 1959], No. 21610/60. Class 120(3) [Also in Group XXXVI] In a method and apparatus for detecting and removing objectionable cross-section variations in yarns or other textiles, a signal produced in or by a measuring member is fed to a Schmitt trigger circuit and any output pulse arising from a signal amplitude exceeding the trigger voltage is applied through a differentiating network to trigger a monostable trigger pair to produce a pulse of sufficient duration to actuate severing means. The output from an inductively coupled transistor oscillator 9, Fig. 3, is fed to a measuring member comprising condensers 11-14 through which the yarn is passed, the measuring signal U 1 is rectified in a network 2 and then passed to a difference amplifier comprising transistors 31, 32, feed back from a succeeding low frequency amplifier 33 being provided through a resistor 306. The Schmitt trigger pair 41, 42, Fig. 4, has a shunt 43 across its input which may alternatively be connected to a variable voltage source whereby the trigger voltage may be adjusted, and its output is differentiated, in C.R. network 51, 52 before being applied to the base of transistor 6 ofthe monostable pair 61, 62. The output pulse U5, of predetermined duration is power amplified by transistors 71, 72 and applied to operate electro magnetic severing means 8. A rectifier 82 is provided for surge suppression at switch-off. An arrangement for adjusting the sensitivity of a group of devices mounted on a single machine by controlling the oscillator D.C. feed voltage is described with reference to Fig. 5 (not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH887547X | 1959-09-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB887547A true GB887547A (en) | 1962-01-17 |
Family
ID=4545395
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB21610/60A Expired GB887547A (en) | 1959-09-11 | 1960-06-20 | Improvements relating to the detection and removal of defective spontaneous cross section variation in textile material |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB887547A (en) |
-
1960
- 1960-06-20 GB GB21610/60A patent/GB887547A/en not_active Expired
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