EP0066418A3 - Sound operated start circuit - Google Patents

Sound operated start circuit Download PDF

Info

Publication number
EP0066418A3
EP0066418A3 EP82302564A EP82302564A EP0066418A3 EP 0066418 A3 EP0066418 A3 EP 0066418A3 EP 82302564 A EP82302564 A EP 82302564A EP 82302564 A EP82302564 A EP 82302564A EP 0066418 A3 EP0066418 A3 EP 0066418A3
Authority
EP
European Patent Office
Prior art keywords
signal
klaxon
machine
circuits
started
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.)
Withdrawn
Application number
EP82302564A
Other languages
German (de)
French (fr)
Other versions
EP0066418A2 (en
Inventor
Colin Rex Johnson Rowe
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.)
BHR Electronic Systems Ltd
Original Assignee
BHR Electronic Systems 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 BHR Electronic Systems Ltd filed Critical BHR Electronic Systems Ltd
Publication of EP0066418A2 publication Critical patent/EP0066418A2/en
Publication of EP0066418A3 publication Critical patent/EP0066418A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/24—Remote control specially adapted for machines for slitting or completely freeing the mineral
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
    • E21F17/18—Special adaptations of signalling or alarm devices
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
    • G08C23/02—Non-electrical signal transmission systems, e.g. optical systems using infrasonic, sonic or ultrasonic waves

Abstract

The invention is concerned with starting of electrical machines from a sound emitting device and is particularly concerned with safety circuits for the start of a coal getting machine on the sounding of a klaxon giving warning to mine workers underground that the machine is to be started and hence to keep clear. The signal from the klaxon is detected as to certain predetermined parameters including amplitude, frequency and the rate at which the klaxon is being operated since it would normally be controlled by a water driven pump. The signal is then fed to a discriminator circuit which then determines that these parameters are correct. Two such circuits are provided in parallel with each other and a signal to enable the machine to be started is only provided at an output terminal when the correct signal is found and detected by both circuits simultaneously.
EP82302564A 1981-05-28 1982-05-20 Sound operated start circuit Withdrawn EP0066418A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8116359 1981-05-28
GB8116359 1981-05-28

Publications (2)

Publication Number Publication Date
EP0066418A2 EP0066418A2 (en) 1982-12-08
EP0066418A3 true EP0066418A3 (en) 1983-10-12

Family

ID=10522111

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82302564A Withdrawn EP0066418A3 (en) 1981-05-28 1982-05-20 Sound operated start circuit

Country Status (3)

Country Link
EP (1) EP0066418A3 (en)
AU (1) AU8408682A (en)
ZA (1) ZA823601B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3941290A1 (en) * 1989-12-14 1991-06-20 Bochumer Eisen Heintzmann METHOD FOR MONITORING AND CONTROLLING OPERATING PROCEDURES IN A MINING UNDERGROUND OPERATION AND MONITORING AND CONTROL DEVICE THEREFOR
CN103527248B (en) * 2013-10-25 2015-07-29 中国矿业大学 Based on coal mine roof plate water barrier Stability Monitoring System and the method for fiber grating
CN109356655B (en) * 2018-12-06 2020-11-17 西安科技大学 Composite coal rock dynamic disaster prediction and early warning method based on gas concentration and acoustic emission extraction indexes

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1387828A (en) * 1971-07-30 1975-03-19 Anderson Mavor Ltd Circuit for a prestart warning system
FR2250453A5 (en) * 1973-11-02 1975-05-30 France Etat Underwater acoustical remote control device - detects the absence of signals on the different frequencies
US4110742A (en) * 1977-07-11 1978-08-29 Hawkins J C Alarm circuit
GB2041601A (en) * 1977-12-14 1980-09-10 Ruppertsberg S Remote control system for the control of electronic apparatus
GB1586036A (en) * 1978-04-12 1981-03-11 Dresser Europe Sa Pre-start warning device for a machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1387828A (en) * 1971-07-30 1975-03-19 Anderson Mavor Ltd Circuit for a prestart warning system
FR2250453A5 (en) * 1973-11-02 1975-05-30 France Etat Underwater acoustical remote control device - detects the absence of signals on the different frequencies
US4110742A (en) * 1977-07-11 1978-08-29 Hawkins J C Alarm circuit
GB2041601A (en) * 1977-12-14 1980-09-10 Ruppertsberg S Remote control system for the control of electronic apparatus
GB1586036A (en) * 1978-04-12 1981-03-11 Dresser Europe Sa Pre-start warning device for a machine

Also Published As

Publication number Publication date
EP0066418A2 (en) 1982-12-08
AU8408682A (en) 1982-12-02
ZA823601B (en) 1983-04-27

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): BE DE FR GB

PUAL Search report despatched

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AK Designated contracting states

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STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19840613

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ROWE, COLIN REX JOHNSON