GB627038A - Improvements in means for detecting mechanical vibrations caused by friction - Google Patents

Improvements in means for detecting mechanical vibrations caused by friction

Info

Publication number
GB627038A
GB627038A GB3336446A GB3336446A GB627038A GB 627038 A GB627038 A GB 627038A GB 3336446 A GB3336446 A GB 3336446A GB 3336446 A GB3336446 A GB 3336446A GB 627038 A GB627038 A GB 627038A
Authority
GB
United Kingdom
Prior art keywords
crystal
vibrations
frame
wire
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
GB3336446A
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.)
Ferranti International PLC
Original Assignee
Ferranti PLC
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 Ferranti PLC filed Critical Ferranti PLC
Priority to GB3336446A priority Critical patent/GB627038A/en
Publication of GB627038A publication Critical patent/GB627038A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/12—Mechanical actuation by the breaking or disturbance of stretched cords or wires
    • G08B13/126—Mechanical actuation by the breaking or disturbance of stretched cords or wires for a housing, e.g. a box, a safe, or a room
    • 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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/04—Mechanical actuation by breaking of glass
    • 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

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

627,038. Stop-motion and broken-end indicator' for roving &c. frames. FERRANTI, Ltd., and TAYLOR, M. K. Nov. 9, 1946, No. 33364. [Classes 120 (ii) and 120 (iii)] [Also in Groups XIX and XXXVIII] Apparatus for detecting the breakage of a sliver in a roving frame comprises a steel piano wire a rigidly secured at each end to a metal inertia mass b resiliently suspended from a member d by a frame f carrying rubber cords g. A piezo-electric crystal h of the bender type is attached to the wire a within the frame f, which is felt lined. The crystal is connected to a valve amplifier through terminals l<SP>1</SP>, m<SP>1</SP> in a strip j carried by lugs i<SP>1</SP> ona thin brass plate i cemented to the crystal. The crystal and amplifier are designed to respond to vibrations of high frequency such as would be caused by the frictional contact of a broken sliver with the wire a and to be unaffected by vibrations of low frequency such as unwanted mechanical and sound vibrations. The controL voltage yielded by the valve amplifier may be used to operate an indicator or a relay for stopping the frame. In place of a crystal, the detector may comprise a. magnetic core and electric winding thereon, sus- . pended by a central mounting from a thin plate p, Fig. 5, of magnetic material with ends bent at right angles near the ends of the core to form short air gaps in a magnetic circuit. The vibrations to be detected will flex the plate to vary the length and hence the reluctance of the air gaps.
GB3336446A 1946-11-09 1946-11-09 Improvements in means for detecting mechanical vibrations caused by friction Expired GB627038A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3336446A GB627038A (en) 1946-11-09 1946-11-09 Improvements in means for detecting mechanical vibrations caused by friction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3336446A GB627038A (en) 1946-11-09 1946-11-09 Improvements in means for detecting mechanical vibrations caused by friction

Publications (1)

Publication Number Publication Date
GB627038A true GB627038A (en) 1949-07-26

Family

ID=10351959

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3336446A Expired GB627038A (en) 1946-11-09 1946-11-09 Improvements in means for detecting mechanical vibrations caused by friction

Country Status (1)

Country Link
GB (1) GB627038A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2260352A1 (en) * 1971-12-10 1973-06-28 Microwave & Electronic Syst DEVICE FOR DETECTION OF DAMAGE TO GLASS PANELS OR SIMILAR
FR2472900A1 (en) * 1974-01-10 1981-07-03 Dynamit Nobel Ag Contact sensor for area surveillance - uses sensor wire connected to piezoelectric or electromagnetic transducer
CN111619511A (en) * 2020-04-22 2020-09-04 东风汽车集团有限公司 Glass breakage alarm reminding device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2260352A1 (en) * 1971-12-10 1973-06-28 Microwave & Electronic Syst DEVICE FOR DETECTION OF DAMAGE TO GLASS PANELS OR SIMILAR
FR2472900A1 (en) * 1974-01-10 1981-07-03 Dynamit Nobel Ag Contact sensor for area surveillance - uses sensor wire connected to piezoelectric or electromagnetic transducer
CN111619511A (en) * 2020-04-22 2020-09-04 东风汽车集团有限公司 Glass breakage alarm reminding device

Similar Documents

Publication Publication Date Title
US2524579A (en) Detection of phenomena capable of setting up vibration
GB1013182A (en) Improvements in ice detector
GB627038A (en) Improvements in means for detecting mechanical vibrations caused by friction
GB896102A (en) Improvements in and relating to accelerometers
GB588178A (en) Improvements in or connected with electro-magnetic pick-up devices for use with stringed musical instruments
US2399297A (en) Frequency indicator for vibrating reed type alternators
GB315496A (en) Improvements relating to relays and other electromagnetic instruments and machines
GB806305A (en) Improvements in transducing devices
GB216946A (en) Improvements in acoustic reproducing devices
GB710823A (en) Improvements relating to pendulums for electrical relays for code signaling systems
US2735984A (en) Shepherd
GB384055A (en) Improvements in or relating to the magnetic systems of sound reproducing apparatus
GB907240A (en) Vibrating string transducer devices and systems for employing the same
GB767424A (en) Improvements relating to acceleration-measuring or vibration-measuring apparatus
GB634982A (en) Improvements in or relating to frequency-sensitive electrical devices such as vibration galvanometers
GB806428A (en) Improvements in or relating to polarized electromagnetic devices
GB224304A (en) Improvements in or relating to sound-reproducing devices
GB591975A (en) An improved armature structure for electro-magnetic apparatus
GB751749A (en) Polarised electromagnetic device
FR976368A (en) Electro-acoustic device
GB305614A (en) Improvements in and relating to sound reproducing apparatus
GB620166A (en) Improvements relating to electrical vibrometers
GB652026A (en) Improvements relating to electro-magnetic pick-ups
GB253080A (en) Telephone instrument
GB337191A (en) Improvements in or relating to sound reproducing or transmitting instruments