FIELD: mining. SUBSTANCE: presence of methane in concentration more than 5% by volume in ambient air makes threshold operate to produce gas overload signal on digital indicator which is sustained until ventilation of device. Simultaneously with indication of digital indicator the light-audible alarm operates. After disconnection of threshold, time relay operates to delay disconnection of gas overload signal to ensure reliable notice of signal. Availability of novel members and connection between them prevent erroneous readings and increase accuracy of evaluation of gas situation danger in mine. EFFECT: higher efficiency. 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| REGULATOR OF AIR FLOW RATE IN BENCH FOR CHECKING AND SETTING MINE METHANE ALARMS | 0 |
|
SU1305404A1 |
| BENCH FOR TESTING AND SETTING-UP MINE METHANE ALARMS | 0 |
|
SU1263886A1 |
| PORTABLE METHANE INDICATOR FOR MINES | 0 |
|
SU1634806A1 |
| SHAFT METHANE INDICATOR CALIBRATION AND TUNING STAND | 0 |
|
SU1765466A1 |
| PORTABLE MINE METHANE INDICATOR | 0 |
|
SU1528932A1 |
| TEST BED FOR CHECK AND ADJUSTMENT OF COLLIERY METHANE ALARMS | 0 |
|
SU1800065A1 |
| MINE PORTABLE METHANE ALARM | 0 |
|
SU1115537A1 |
| PORTABLE MINE OXYGEN DETECTOR | 0 |
|
SU1723347A1 |
| RACK FOR TESTING AND TUNING-UP MINE METHANE ALARMS | 0 |
|
SU1105667A1 |
| ARRANGEMENT FOR GAS PROTECTION OF COAL MINES | 0 |
|
SU1333778A1 |
