GB1407815A - Signalling devices - Google Patents

Signalling devices

Info

Publication number
GB1407815A
GB1407815A GB2248872A GB2248872A GB1407815A GB 1407815 A GB1407815 A GB 1407815A GB 2248872 A GB2248872 A GB 2248872A GB 2248872 A GB2248872 A GB 2248872A GB 1407815 A GB1407815 A GB 1407815A
Authority
GB
United Kingdom
Prior art keywords
magnetic
housing
passage
signalling
flag
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
GB2248872A
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.)
PIPELINE ENG SUPPLY CO Ltd
Original Assignee
PIPELINE ENG SUPPLY 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 PIPELINE ENG SUPPLY CO Ltd filed Critical PIPELINE ENG SUPPLY CO Ltd
Priority to GB2248872A priority Critical patent/GB1407815A/en
Publication of GB1407815A publication Critical patent/GB1407815A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/24—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/02—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using only mechanical transmission

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromechanical Clocks (AREA)

Abstract

1407815 Signalling device PIPELINE ENG & SUPPLY CO Ltd 10 May 1973 [12 May 1972] 22488/72 Heading G4F [Also in Division F2] A device for signalling the passage of a body past a point in a pipe 2 comprises a housing 3 and a trigger lever 4 which when actuated by the body causes magnetic or magnetizably body 6 inside the housing to move away from another magnetic or magnetizable body 7 outside the housing, thus allowing flag 8 to move to a visible position. After passage of the body, lever 4 is returned to its extended position by means of spring 410. Reference is made to alternative arrangements in which rotation or movement of the magnetic body 6 brings a different magnetic pole opposite the magnetic body 7. In place of the body 7 and flag 8, a magnetic proximity switch may be mounted on housing 3 and connected in an electrical circuit controlling a visual and/or audible alarm.
GB2248872A 1972-05-12 1972-05-12 Signalling devices Expired GB1407815A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2248872A GB1407815A (en) 1972-05-12 1972-05-12 Signalling devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2248872A GB1407815A (en) 1972-05-12 1972-05-12 Signalling devices

Publications (1)

Publication Number Publication Date
GB1407815A true GB1407815A (en) 1975-09-24

Family

ID=10180221

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2248872A Expired GB1407815A (en) 1972-05-12 1972-05-12 Signalling devices

Country Status (1)

Country Link
GB (1) GB1407815A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2200775A (en) * 1987-01-29 1988-08-10 Int Pipeline Prod Ltd Actuator for pipeline signaling device
US4976215A (en) * 1989-04-10 1990-12-11 Lee William C Door activity monitoring apparatus
US5279251A (en) * 1992-12-16 1994-01-18 Tdw Delaware, Inc. Bidirectional pipeline pig signaling device
US7861665B2 (en) * 2007-05-11 2011-01-04 Tdw Delaware Inc. Pipeline pig signal with adjustable mounting

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2200775A (en) * 1987-01-29 1988-08-10 Int Pipeline Prod Ltd Actuator for pipeline signaling device
GB2200775B (en) * 1987-01-29 1990-06-20 Int Pipeline Prod Ltd Actuator for pipeline signalling device
US4976215A (en) * 1989-04-10 1990-12-11 Lee William C Door activity monitoring apparatus
US5279251A (en) * 1992-12-16 1994-01-18 Tdw Delaware, Inc. Bidirectional pipeline pig signaling device
US7861665B2 (en) * 2007-05-11 2011-01-04 Tdw Delaware Inc. Pipeline pig signal with adjustable mounting

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19930509