GB991012A - Roof support assembly - Google Patents

Roof support assembly

Info

Publication number
GB991012A
GB991012A GB20179/63A GB2017963A GB991012A GB 991012 A GB991012 A GB 991012A GB 20179/63 A GB20179/63 A GB 20179/63A GB 2017963 A GB2017963 A GB 2017963A GB 991012 A GB991012 A GB 991012A
Authority
GB
United Kingdom
Prior art keywords
pressure
line
sequence
advancing
predetermined
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
GB20179/63A
Inventor
Douglas Herbert Hewlett Bolton
Michael Charles Potts
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.)
Dowty Mining Equipment Ltd
Original Assignee
Dowty Mining Equipment 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 Dowty Mining Equipment Ltd filed Critical Dowty Mining Equipment Ltd
Publication of GB991012A publication Critical patent/GB991012A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices
    • E21D23/0073—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices with advancing shifting devices connected therewith
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/12—Control, e.g. using remote control
    • E21D23/14—Effecting automatic sequential movement of supports, e.g. one behind the other
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8158—With indicator, register, recorder, alarm or inspection means
    • Y10T137/8326—Fluid pressure responsive indicator, recorder or alarm

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Conveyors (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Measuring Volume Flow (AREA)
  • Lining And Supports For Tunnels (AREA)

Abstract

991,012. Advancing mine roof supports. DOWTY MINING EQUIPMENT Ltd. May 21, 1963 [May 25, 1962], No. 20179/63. Divided out of 991,007. Heading F1P. In a roof support assembly wherein a series of roof supports are automatically advanceable in a predetermined sequence when supplied in turn with fluid under pressure from a line 11, a sequence stoppage indicator 18 including a warning device 24 is arranged to indicate, during an advancing sequence, the existence of a predetermined pressure in the line 11 for more than a predetermined period of time. The indicator 18 comprises a pressure gauge 19 supplied with fluid from the line 11, and having a pointer 22 which completes the circuit to the warning device through a contact 22 and a pressure switch 25, when the pressure exceeds a predetermined maximum. The pressure switch 25 ensures that the warning device is operative in response to maximum pressure only during an advancing sequence. The device 24 incorporates a delay mechanism to prevent operation due to normal pressure fluctuations associated with support advancing operations. A further contact 27 is engaged by the pointer 21 should a low pressure in the line 11 occur at any time for more than a predetermined period. Specification 991,008 also is referred to.
GB20179/63A 1962-05-25 1962-05-25 Roof support assembly Expired GB991012A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB20198/62A GB991007A (en) 1962-05-25 1962-05-25 Mining apparatus

Publications (1)

Publication Number Publication Date
GB991012A true GB991012A (en) 1965-05-05

Family

ID=10142036

Family Applications (2)

Application Number Title Priority Date Filing Date
GB20179/63A Expired GB991012A (en) 1962-05-25 1962-05-25 Roof support assembly
GB20198/62A Expired GB991007A (en) 1962-05-25 1962-05-25 Mining apparatus

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB20198/62A Expired GB991007A (en) 1962-05-25 1962-05-25 Mining apparatus

Country Status (4)

Country Link
US (2) US3228300A (en)
DE (2) DE1189504B (en)
FR (2) FR1356891A (en)
GB (2) GB991012A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1023827A (en) * 1963-06-21 1966-03-23 Dowty Mining Equipment Ltd Roof support assembly
GB1022469A (en) * 1964-02-11 1966-03-16 Dowty Mining Equipment Ltd Roof support assembly suitable for use in mines
GB1123975A (en) * 1964-10-12 1968-08-14 Dowty Electrics Ltd Hydraulically-operated advancing mine roof supports
GB1126902A (en) * 1964-10-22 1968-09-11 Fairey Eng Improvements relating to hydraulic control systems
US3318328A (en) * 1965-05-26 1967-05-09 Combustion Eng Alarm system
FR1463082A (en) * 1965-10-22 1966-06-03 Botalam Installation for automatic control of hydraulic cylinders, or the like
US3455329A (en) * 1966-08-05 1969-07-15 Gabriel Roth Pneumatic indicating device
DE1583080A1 (en) * 1966-10-14 1970-04-23 Dowty Mining Equipment Ltd Pit ceiling extension
US3657964A (en) * 1969-07-14 1972-04-25 Gardner Denver Co Control system for nutsetter

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1069548B (en) * 1959-11-26
US1312787A (en) * 1919-08-12 Intermittent-grip device
US627661A (en) * 1899-01-06 1899-06-27 Wilson E Symons Emergency-recorder for air-brakes.
US758819A (en) * 1902-10-28 1904-05-03 Robert G Callum Electric system for indicating the temperature of a distant point.
US2711634A (en) * 1949-05-25 1955-06-28 Joy Mfg Co Mine roof supporting means
US2753036A (en) * 1952-03-06 1956-07-03 Joy Mfg Co Mine roof support-equipped mining apparatus
US2749536A (en) * 1953-09-16 1956-06-05 Sperling Gustav Electrically operated leak detector
AT184539B (en) * 1954-04-12 1956-01-25 Kloeckner Bergbau Victor Icker Wandering expansion with expansion spans actuated by a pressure medium
US3045627A (en) * 1956-05-24 1962-07-24 Robert C Eck Depth control system
US2959156A (en) * 1956-08-03 1960-11-08 Sarl Ratier Aviat Marine Hydraulic servo-device for controlling linearly or rotatably movable members, with indication of the position thereof
FR1201174A (en) * 1957-08-10 1959-12-29 Gewerk Eisenhuette Westfalia Method and device for controlling a hydraulic support, usable in particular in mines
DE1109629B (en) * 1958-09-20 1961-06-29 Hoesch Bergbautechnik G M B H Arrangement for mechanized longwall mining

Also Published As

Publication number Publication date
US3217603A (en) 1965-11-16
DE1189504B (en) 1965-03-25
US3228300A (en) 1966-01-11
FR1356891A (en) 1964-03-27
GB991007A (en) 1965-05-05
FR1356892A (en) 1964-03-27
DE1176087B (en) 1964-08-20

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