GB649789A - Improvements in or relating to electro-magnetic detecting devices - Google Patents

Improvements in or relating to electro-magnetic detecting devices

Info

Publication number
GB649789A
GB649789A GB88848A GB88848A GB649789A GB 649789 A GB649789 A GB 649789A GB 88848 A GB88848 A GB 88848A GB 88848 A GB88848 A GB 88848A GB 649789 A GB649789 A GB 649789A
Authority
GB
United Kingdom
Prior art keywords
knives
inductors
knife
machine
bridge
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
GB88848A
Inventor
Desmond Walter Molins
Edward Anthony Chandler
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.)
Molins Machine Co Ltd
Original Assignee
Molins Machine Co Ltd
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 Molins Machine Co Ltd filed Critical Molins Machine Co Ltd
Priority to GB88848A priority Critical patent/GB649789A/en
Publication of GB649789A publication Critical patent/GB649789A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B7/00—Cutting tobacco
    • A24B7/14—Feeding or control devices for tobacco-cutting apparatus
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B7/00—Cutting tobacco
    • A24B7/04—Cutting tobacco by machines with revolving knives
    • A24B7/08—Cutting tobacco by machines with revolving knives with several knives which act one after the other
    • A24B7/10—Cutting tobacco by machines with revolving knives with several knives which act one after the other with cutter axes parallel to the feeding direction
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
    • G01V3/104—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

649,789. Indicating breakage of knives of tobacco-cutting machines. MOLINS MACHINE CO., Ltd. Jan. 12, 1948, No. 888. [Class 37] A device for the detection of breakages in the knives of tobacco-cutting machines comprises two pairs, 5A, 5B and 5C, 5D, of inductors with gaps in their magnetic circuits past which the knives 3 sweep so that the whole of the leading edge of each knife is scanned. The inductors form a balanced bridge and are excited at 5000 cycles and are so designed and mounted that as a complete knife sweeps over a pair, the change in inductance is the same in each inductor and the bridge remains balanced, but if a knife is broken, the inductors are unequally affected and the output of the bridge after amplification and filtering to remove lowfrequency components operates a relay in the circuit of a thyratron to stop the machine. Each inductor may be tuned to the exciting frequency. The machine may be that described in Specification 588,129, [Group 1].
GB88848A 1948-01-12 1948-01-12 Improvements in or relating to electro-magnetic detecting devices Expired GB649789A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB88848A GB649789A (en) 1948-01-12 1948-01-12 Improvements in or relating to electro-magnetic detecting devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB88848A GB649789A (en) 1948-01-12 1948-01-12 Improvements in or relating to electro-magnetic detecting devices

Publications (1)

Publication Number Publication Date
GB649789A true GB649789A (en) 1951-01-31

Family

ID=9712248

Family Applications (1)

Application Number Title Priority Date Filing Date
GB88848A Expired GB649789A (en) 1948-01-12 1948-01-12 Improvements in or relating to electro-magnetic detecting devices

Country Status (1)

Country Link
GB (1) GB649789A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1532870A1 (en) * 2003-11-22 2005-05-25 Hauni Primary GmbH Device and method for cutting tobacco from a tobacco bale
WO2005053442A1 (en) * 2003-12-05 2005-06-16 International Tobacco Machinery Poland Ltd. Method of controlling a gap between knives of a cutting machine for organic plant materials, particularly tobacco materials

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1532870A1 (en) * 2003-11-22 2005-05-25 Hauni Primary GmbH Device and method for cutting tobacco from a tobacco bale
WO2005053442A1 (en) * 2003-12-05 2005-06-16 International Tobacco Machinery Poland Ltd. Method of controlling a gap between knives of a cutting machine for organic plant materials, particularly tobacco materials

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