GB1474920A - Apparatus for use in detecting a defective needle in a knitting machine - Google Patents

Apparatus for use in detecting a defective needle in a knitting machine

Info

Publication number
GB1474920A
GB1474920A GB1881874A GB1881874A GB1474920A GB 1474920 A GB1474920 A GB 1474920A GB 1881874 A GB1881874 A GB 1881874A GB 1881874 A GB1881874 A GB 1881874A GB 1474920 A GB1474920 A GB 1474920A
Authority
GB
United Kingdom
Prior art keywords
needles
coil
machine
oscillator
phase
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
GB1881874A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 by Individual filed Critical Individual
Publication of GB1474920A publication Critical patent/GB1474920A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/10—Indicating, warning, or safety devices, e.g. stop motions
    • D04B35/18—Indicating, warning, or safety devices, e.g. stop motions responsive to breakage, misplacement, or malfunctioning of knitting instruments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D2007/0012—Details, accessories or auxiliary or special operations not otherwise provided for
    • B26D2007/0087—Details, accessories or auxiliary or special operations not otherwise provided for for use on a desktop

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)

Abstract

1474920 Detecting broken needles in knitting machines E I PARKER 30 April 1974 [16 May 1973] 18818/74 Heading G1N [ Also in Division D1] Defective needles in e.g. a circular knitting machine Fig. 1 (not shown) are detected using a test coil 16 mounted adjacent the machine so that the needles pass sequentially into the field of the coil, Fig. 2 (not shown). Test coil 16 is connected as the frequency determining element of oscillator 52 frequency locked by coupling 54 with reference oscillator 51 and having a pre-set phase angle maintained by an automatic phase control signal applied to coupling 99, 100 from 59. However if the difference in phase of the oscillator outputs on lines 83, 94 as detected at 104 changes by more than a predetermined amount due to a change in inductance of coil 16 when the envelope of needles passing therethrough contains a broken needle, capacitor 133 delaying the change in APC voltage on 59, relays 57 Fig. 5 (not shown) are energized to stop the operation of the machine and the degree of phase imbalance is shown on meter 58 on a C.R.T. connected to lines 84, 98.
GB1881874A 1973-05-16 1974-04-30 Apparatus for use in detecting a defective needle in a knitting machine Expired GB1474920A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US360636A US3910074A (en) 1973-05-16 1973-05-16 Damaged needle detection apparatus

Publications (1)

Publication Number Publication Date
GB1474920A true GB1474920A (en) 1977-05-25

Family

ID=23418837

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1881874A Expired GB1474920A (en) 1973-05-16 1974-04-30 Apparatus for use in detecting a defective needle in a knitting machine

Country Status (4)

Country Link
US (1) US3910074A (en)
JP (1) JPS5040859A (en)
DE (1) DE2421734A1 (en)
GB (1) GB1474920A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2298633A2 (en) * 1975-01-22 1976-08-20 Inst Textile De France DEVICE D
US3995450A (en) * 1975-05-08 1976-12-07 The Singer Company Knitting machine performance regulating system
US4033149A (en) * 1976-07-26 1977-07-05 The Raymond Lee Organization, Inc. Latch closer in combination with a closed latch detector
US5801379A (en) * 1996-03-01 1998-09-01 Mine Safety Appliances Company High voltage waveform generator
US6035669A (en) * 1999-05-28 2000-03-14 Monarch Knitting Machinery Corp. Apparatus and method for detecting broken hooks of needles in a knitting machine
US6318132B1 (en) 2001-03-19 2001-11-20 Monarch Knitting Machinery Corp. Apparatus and method for detecting broken hooks of needles in a knitting machine, and needles for use with same
DE102018222660A1 (en) * 2018-12-20 2020-06-25 Micro-Epsilon Messtechnik Gmbh & Co. Kg Method for detecting defects or changes in length on a needle-shaped measurement object, device for using the method and printed circuit board as part of the device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3222664A (en) * 1962-12-03 1965-12-07 Honeywell Inc Detection apparatus
US3345563A (en) * 1963-07-01 1967-10-03 American Mach & Foundry Method and apparatus for measuring true discontinuities in members of varying thickness by compensating for the effect of thickness on such measurements
US3397364A (en) * 1967-05-24 1968-08-13 Small Business Administ Inductive loop metallic object detector
US3492564A (en) * 1968-01-22 1970-01-27 Leslie H Baker Jr Metal body locator including two similar,functionally variable frequency oscillators,two search coils and cross-coupling means
US3588686A (en) * 1968-05-27 1971-06-28 Kennecott Copper Corp Tramp metal detection system with belt splice avoidance for conveyors
US3646542A (en) * 1970-02-25 1972-02-29 Russell Mills Inc Monitor systems
US3690127A (en) * 1971-03-15 1972-09-12 Stop Motion Devices Corp Defective latch needle detector and control network therefor

Also Published As

Publication number Publication date
DE2421734A1 (en) 1974-12-12
JPS5040859A (en) 1975-04-14
US3910074A (en) 1975-10-07

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee