GB506606A - Improved means for preventing the spread of explosions in mines - Google Patents

Improved means for preventing the spread of explosions in mines

Info

Publication number
GB506606A
GB506606A GB8907/38A GB890738A GB506606A GB 506606 A GB506606 A GB 506606A GB 8907/38 A GB8907/38 A GB 8907/38A GB 890738 A GB890738 A GB 890738A GB 506606 A GB506606 A GB 506606A
Authority
GB
United Kingdom
Prior art keywords
speed
gun
fire
differential gear
control shaft
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
GB8907/38A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB506606A publication Critical patent/GB506606A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
    • E21F5/14—Fluid barriers or rock dusters made to work by, or at the same time as, shots or explosions
    • E21F5/146—Rock dusters

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)
  • Retarders (AREA)

Abstract

506,606. Automatic control systems. RHEINMETALL-BORSIG AKT.-GES., and GRAF, W. Feb. 16, 1938, No. 4833. [Class 38 (iv)] [Also in Groups XXI and XXVI] Speed.-Apparatus for maintaining a desired speed relation between two shafts comprises a control shaft a driven by one of the shafts, the other shaft b being driven by an electric motor M, changes in speed of the control shaft a acting through a differential gear c, d, e, not only to vary the speed of the motor M in a sense to cause the desired speed 'relation to be resumed, but, at the same time, to control a further device the action of which depends on the momentary speed of the control shaft. The planetary member d of the differential gear may be arranged to shift the brush-carrier h of the electric motor M and to adjust, through the planetary member u of a second differential gear, the cam r<1> which controls the synchronized fire of a gun p between the blades of an aircraft propeller X. Further, the invention may be applied to adjusting the angle betweon the gun and sight in anti-aircraft gun fire, which angle depends on the momentary speed of the target across the line of fire of the gun. Specification 494,288, [Group XXI], is referred to.
GB8907/38A 1937-03-23 1938-03-23 Improved means for preventing the spread of explosions in mines Expired GB506606A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US506606X 1937-03-23

Publications (1)

Publication Number Publication Date
GB506606A true GB506606A (en) 1939-06-01

Family

ID=21966605

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8907/38A Expired GB506606A (en) 1937-03-23 1938-03-23 Improved means for preventing the spread of explosions in mines

Country Status (1)

Country Link
GB (1) GB506606A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1054041B (en) * 1957-06-11 1959-04-02 Arthur Klaesener Rock dust barrier for mining operations
DE1235243B (en) * 1963-03-21 1967-03-02 Ferroplast Gmbh Water barrier against coal dust explosions in underground operations
US3960217A (en) * 1975-10-14 1976-06-01 The United States Of America As Represented By The Secretary Of The Interior Passive explosion barrier
GB2216002A (en) * 1988-02-25 1989-10-04 Davis Derby Limited Barrier systems for mines

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1054041B (en) * 1957-06-11 1959-04-02 Arthur Klaesener Rock dust barrier for mining operations
DE1235243B (en) * 1963-03-21 1967-03-02 Ferroplast Gmbh Water barrier against coal dust explosions in underground operations
US3960217A (en) * 1975-10-14 1976-06-01 The United States Of America As Represented By The Secretary Of The Interior Passive explosion barrier
GB2216002A (en) * 1988-02-25 1989-10-04 Davis Derby Limited Barrier systems for mines

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