GB1292337A - Improvements in or relating to annunciators for detecting open circuit conditions in electrical circuits - Google Patents

Improvements in or relating to annunciators for detecting open circuit conditions in electrical circuits

Info

Publication number
GB1292337A
GB1292337A GB32780/69A GB3278069A GB1292337A GB 1292337 A GB1292337 A GB 1292337A GB 32780/69 A GB32780/69 A GB 32780/69A GB 3278069 A GB3278069 A GB 3278069A GB 1292337 A GB1292337 A GB 1292337A
Authority
GB
United Kingdom
Prior art keywords
lamps
housing
open circuit
june
photo
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
GB32780/69A
Inventor
Maurice George Duffill
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.)
J T SCOTNEY Ltd
Original Assignee
J T SCOTNEY 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 J T SCOTNEY Ltd filed Critical J T SCOTNEY Ltd
Priority to GB32780/69A priority Critical patent/GB1292337A/en
Publication of GB1292337A publication Critical patent/GB1292337A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
    • H02H3/046—Signalling the blowing of a fuse
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/54—Testing for continuity

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)

Abstract

1292337 System monitoring J T SCOTNEY Ltd 26 June 1970 [28 June 1969] 32780/69 Heading G1A [Also in Division H2] A fault detecting arrangement comprises an insulating chamber 10 containing a radiation sensitive detector, e.g. a photo-cell or thermocouple and one or more radiation generating devices, e.g. lamps 14 or heaters, the or each device being connected across a normally conductive element, e.g. a fuse or switch contacts, for response to the voltage across the element when an open circuit fault occurs. The output from the detector may effect the operation of a visual and/or audible alarm and may halt a protected apparatus. As shown, neon lamps 14 and ballast resistors 16 are encapsulated in the wall of a cylindrical housing 10 with the exception of an inwardly facing portion of the envelope of each lamp. A photo-cell (not shown) is placed in the housing and end plates close the housing. Connecting pins 26 for the lamps and resistors may be plugged into a wafer socket member or into sockets in a cylindrical housing having indicating lamps respectively connected in parallel with the neon lamps.
GB32780/69A 1969-06-28 1969-06-28 Improvements in or relating to annunciators for detecting open circuit conditions in electrical circuits Expired GB1292337A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB32780/69A GB1292337A (en) 1969-06-28 1969-06-28 Improvements in or relating to annunciators for detecting open circuit conditions in electrical circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB32780/69A GB1292337A (en) 1969-06-28 1969-06-28 Improvements in or relating to annunciators for detecting open circuit conditions in electrical circuits

Publications (1)

Publication Number Publication Date
GB1292337A true GB1292337A (en) 1972-10-11

Family

ID=10343892

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32780/69A Expired GB1292337A (en) 1969-06-28 1969-06-28 Improvements in or relating to annunciators for detecting open circuit conditions in electrical circuits

Country Status (1)

Country Link
GB (1) GB1292337A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees