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GB818216A - An electrical circuit testing instrument - Google Patents

An electrical circuit testing instrument

Info

Publication number
GB818216A
GB818216A GB988/56A GB98856A GB818216A GB 818216 A GB818216 A GB 818216A GB 988/56 A GB988/56 A GB 988/56A GB 98856 A GB98856 A GB 98856A GB 818216 A GB818216 A GB 818216A
Authority
GB
United Kingdom
Prior art keywords
resistor
battery
series
meter
terminals
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
GB988/56A
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.)
FRELAND M MURPHY
Original Assignee
FRELAND M MURPHY
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 FRELAND M MURPHY filed Critical FRELAND M MURPHY
Priority to GB988/56A priority Critical patent/GB818216A/en
Publication of GB818216A publication Critical patent/GB818216A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
    • G01R31/2836—Fault-finding or characterising
    • G01R31/2839—Fault-finding or characterising using signal generators, power supplies or circuit analysers
    • 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
    • G01R31/58—Testing of lines, cables or conductors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Leads Or Probes (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

818,216. Electric tests. MURPHY, F. M. Jan. 11, 1956, No. 988/56. Class 37. A test set intended to be used in a continuity tester, ohmeter and cable pair identifier comprises a microammeter 49, buzzer 47, fixed resistors 36, 68, 71, variable resistor 51, battery 48 and four-position three-gang switch 25. The extreme left-hand position of the threegang switch is " OFF ". In the second position, buzzer 47 is connected in series with terminals 45, 46 and battery 48. In the fourth position, the instrument acts as an ohmeter with meter 49 and series resistor 71 shunted by resistor 68, while variable resistor 51 shunted by resistor 59 is in series with the meter and battery. In the third position from the left resistors 68 and 59 are disconnected and the meter is connected in series with the terminals, the battery, resistor 71 and variable resistor 51. In this position of the switch the instrument can be used for identifying cable pair is a multicore cable by connecting the pairs at the end to where they are identified to a terminal board as described in U.S.A. Specification 2,822,519 and making resistance readings on the unknown terminals, the values of these readings on a specially calibrated scale identifying the numbers of the pair under test.
GB988/56A 1956-01-11 1956-01-11 An electrical circuit testing instrument Expired GB818216A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB988/56A GB818216A (en) 1956-01-11 1956-01-11 An electrical circuit testing instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB988/56A GB818216A (en) 1956-01-11 1956-01-11 An electrical circuit testing instrument

Publications (1)

Publication Number Publication Date
GB818216A true GB818216A (en) 1959-08-12

Family

ID=9714041

Family Applications (1)

Application Number Title Priority Date Filing Date
GB988/56A Expired GB818216A (en) 1956-01-11 1956-01-11 An electrical circuit testing instrument

Country Status (1)

Country Link
GB (1) GB818216A (en)

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