GB885569A - Improvements in or relating to circuits for testing polarised telegraph relays - Google Patents

Improvements in or relating to circuits for testing polarised telegraph relays

Info

Publication number
GB885569A
GB885569A GB2972359A GB2972359A GB885569A GB 885569 A GB885569 A GB 885569A GB 2972359 A GB2972359 A GB 2972359A GB 2972359 A GB2972359 A GB 2972359A GB 885569 A GB885569 A GB 885569A
Authority
GB
United Kingdom
Prior art keywords
trace
contact
phase
relay
circuit
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
GB2972359A
Inventor
Alan Macfarlane
Edward Pierce Hughes
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.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric 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 Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Priority to GB2972359A priority Critical patent/GB885569A/en
Publication of GB885569A publication Critical patent/GB885569A/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
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
    • G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/20—Testing circuits or apparatus; Circuits or apparatus for detecting, indicating, or signalling faults or troubles

Abstract

885,569. Measuring short time intervals. AUTOMATIC TELEPHONE & ELECTRIC CO. Ltd. Aug. 17, 1960 [Sept. 1, 1959], No. 29723/59. Class 37. The " operate " and " release " lays of an e.m. relay are displayed on the C.R.T. by providing two sinusoidal signals 90 degrees out of phase from SG to produce a circular trace, a further signal being provided from SG to an adjustable squaring circuit SC and a phase splitter PS, the output of which drives current through the coil in opposite directions as the signal changes polarity, the arrangement being such that when contact TRI is closed on either side the trace is visible, but when it is in transit the trace is suppressed by means of a brightening circuit BC connected to earth by contact TRI, a monostable circuit MS controlled by one of the phase-splitter outputs applying a short brightening pulse on each current reversal to produce a bright spot on the trace which therefore shows the relation between the current change in the relay coil and the relay response. This applies to a " break " contact set, when a " male " set is tested, the C.R.T. trace is suppressed while the moving spring is in contact with the stationary spring.
GB2972359A 1959-09-01 1959-09-01 Improvements in or relating to circuits for testing polarised telegraph relays Expired GB885569A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2972359A GB885569A (en) 1959-09-01 1959-09-01 Improvements in or relating to circuits for testing polarised telegraph relays

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2972359A GB885569A (en) 1959-09-01 1959-09-01 Improvements in or relating to circuits for testing polarised telegraph relays

Publications (1)

Publication Number Publication Date
GB885569A true GB885569A (en) 1961-12-28

Family

ID=10296093

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2972359A Expired GB885569A (en) 1959-09-01 1959-09-01 Improvements in or relating to circuits for testing polarised telegraph relays

Country Status (1)

Country Link
GB (1) GB885569A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112219124A (en) * 2018-06-15 2021-01-12 菲尼克斯电气公司 Switch monitoring device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112219124A (en) * 2018-06-15 2021-01-12 菲尼克斯电气公司 Switch monitoring device
CN112219124B (en) * 2018-06-15 2023-12-15 菲尼克斯电气公司 Switch monitoring device

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