GB1234095A - - Google Patents

Info

Publication number
GB1234095A
GB1234095A GB1234095DA GB1234095A GB 1234095 A GB1234095 A GB 1234095A GB 1234095D A GB1234095D A GB 1234095DA GB 1234095 A GB1234095 A GB 1234095A
Authority
GB
United Kingdom
Prior art keywords
thread
switch
capacitor
charge
amplifier
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
Application number
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of GB1234095A publication Critical patent/GB1234095A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/04—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only
    • H03F3/08—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only controlled by light
    • 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
    • B65H63/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material
    • B65H63/024—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials
    • B65H63/028—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element
    • B65H63/032—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic
    • B65H63/0321—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic using electronic actuators
    • 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)
  • Power Engineering (AREA)
  • Quality & Reliability (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Amplifiers (AREA)
  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
  • Inverter Devices (AREA)

Abstract

1,234,095. Photo-electric thread supervision. W. REINERS. July 29, 1968 [July 27, 1967], No.35997/68. Heading G1A. [Also in Division H3] The invention relates to a device for switching off a textile machine in the absence of a thread (e.g. due to breakage, the end of a spool or cutting of the thread), in which the movement of the thread produces an alternating voltage which is amplified, rectified and then used to charge a capacitor which controls the machine switch. According to the invention operation is speeded by emphasizing the higher frequencies, by limiting the alternating signal amplitude and by using a rectifier of the full wave type. As shown, the photoelectric cell 1 receives light from a path including a very short length of its thread so that the relatively high frequency voltages due to vibration and projecting fibres are produced. These are passed through an amplifier which emphasizes the high frequencies to a full wave rectifier 21, a storage capacitor 22 and a switch controlling transistor 24. The capacitor prevents short spurious pulses from operating the switch. Its discharge time may however be short; firstly because the full wave rectifier provides a restoring charge at each half cycle, secondly because the amplifier selects the higher frequency components of the alternating wave and thirdly because the amplifier is designed to limit the alternating signal amplitude to a low level so that even on a strong signal the charge on the capacitor is not large. The frequency selection is effected by a circuit 14, 15, 6 which provides negative feedback at lower frequencies and positive feedback at higher frequencies. Diodes 26 provide for control of the switch-off of the machine by other circuits. The photo-electric detector 1 may be replaced by one of the capacitive or mechanically vibrating type and thread guides are placed close to each side of the detector to confine thread vibrations to the higher frequencies.
GB1234095D 1967-07-27 1968-07-29 Expired GB1234095A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER0046603 1967-07-27

Publications (1)

Publication Number Publication Date
GB1234095A true GB1234095A (en) 1971-06-03

Family

ID=7408101

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1234095D Expired GB1234095A (en) 1967-07-27 1968-07-29

Country Status (8)

Country Link
US (1) US3543100A (en)
BE (1) BE718695A (en)
CH (1) CH487275A (en)
DE (1) DE1710982B2 (en)
ES (1) ES356440A1 (en)
FR (1) FR1580508A (en)
GB (1) GB1234095A (en)
NL (1) NL6810635A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000073554A1 (en) * 1999-05-27 2000-12-07 Eltex Of Sweden Ab Braking device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753073A (en) * 1972-01-20 1973-08-14 W Rawlins Signal interpreting circuit
DD206659A3 (en) * 1981-07-16 1984-02-01 Textima Veb K DEVICE FOR FADEN MONITORING IN A TEXTILE MACHINE
CN109423723A (en) * 2017-08-31 2019-03-05 际华三五四二纺织有限公司 The intelligent anti-risk yarn feeding device of fly frame

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3043991A (en) * 1962-07-10 figure
US3104346A (en) * 1959-03-14 1963-09-17 Whitworth Gloster Aircraft Ltd Pattern controlled programming mechanism
FR1455157A (en) * 1965-06-17 1966-04-01 Seita Automatic shut-off device of a machine such as a cigarette making machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000073554A1 (en) * 1999-05-27 2000-12-07 Eltex Of Sweden Ab Braking device

Also Published As

Publication number Publication date
DE1710982B2 (en) 1975-09-18
CH487275A (en) 1970-03-15
FR1580508A (en) 1969-09-05
NL6810635A (en) 1969-01-29
US3543100A (en) 1970-11-24
BE718695A (en) 1968-12-31
ES356440A1 (en) 1970-01-16
DE1710982A1 (en) 1971-12-30

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees