GB862783A - Improvements in or relating to mine roof support bars and to connecting means thereof - Google Patents

Improvements in or relating to mine roof support bars and to connecting means thereof

Info

Publication number
GB862783A
GB862783A GB794859A GB794859A GB862783A GB 862783 A GB862783 A GB 862783A GB 794859 A GB794859 A GB 794859A GB 794859 A GB794859 A GB 794859A GB 862783 A GB862783 A GB 862783A
Authority
GB
United Kingdom
Prior art keywords
tongue
vanwersch
bars
support bars
roof support
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
GB794859A
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 GB862783A publication Critical patent/GB862783A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B15/00—Wheels or wheel attachments designed for increasing traction
    • B60B15/26—Auxiliary wheels or rings with traction-increasing surface attachable to the main wheel body
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/02—Cantilever extension or similar protecting devices
    • E21D17/08—Cap joints for obtaining a coal-face free of pit-props
    • E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/26—Snap-action arrangements depending upon deformation of elastic members
    • H01H13/36—Snap-action arrangements depending upon deformation of elastic members using flexing of blade springs

Abstract

862,783. Mine-roof supports. VANWERSCH, P., VANWERSCH, L., and VANWERSCH, A. March 6, 1959 [March 6, 1958], No. 7948/59. Class 20(2) A connection for tongue-and-fork roof support bars 1, 2 which are symmetrical about a horizontal mid-section, is erected by inserting a pivot pin 3 into holes in the fork and into a slot 5 in the tongue and by engaging one of the wedging surfaces 6 on a non-rotating slide 4 with the tongue. When the slide is in 'mid' position, the region 8 provides clearance for the tongue to enable the bar 1 to be swung into or down from a near-horizontal position. A modified arrangement (Figs. 6, 7, 8, not shown) uses a plain hole for the pin 3 in the tongue and an auxiliary pivot pin to assist in aligning the bars to insert the main pin 3; the arrangement also allows a continuous straight line to be maintained over the upper surfaces on the bars and their joint.
GB794859A 1952-08-13 1959-03-06 Improvements in or relating to mine roof support bars and to connecting means thereof Expired GB862783A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DEE7081A DE1035602B (en) 1952-08-13 1952-08-13 Shell iron
DEV13270A DE1043256B (en) 1952-08-13 1952-08-13 Wedge for the articulated connection of caps
DEV14000A DE1110590B (en) 1952-08-13 1958-03-06 Cap connection for the pit lining

Publications (1)

Publication Number Publication Date
GB862783A true GB862783A (en) 1961-03-15

Family

ID=42830343

Family Applications (3)

Application Number Title Priority Date Filing Date
GB1167356A Expired GB762750A (en) 1952-08-13 1953-08-13 A wedge for use in connections for girders supporting mine roofs
GB2237053A Expired GB762667A (en) 1952-08-13 1953-08-13 A wedge for use in connections for girders for supporting mine roofs
GB794859A Expired GB862783A (en) 1952-08-13 1959-03-06 Improvements in or relating to mine roof support bars and to connecting means thereof

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB1167356A Expired GB762750A (en) 1952-08-13 1953-08-13 A wedge for use in connections for girders supporting mine roofs
GB2237053A Expired GB762667A (en) 1952-08-13 1953-08-13 A wedge for use in connections for girders for supporting mine roofs

Country Status (5)

Country Link
BE (1) BE576433A (en)
DE (3) DE1035602B (en)
FR (3) FR1082249A (en)
GB (3) GB762750A (en)
NL (1) NL90361C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1186014B (en) * 1960-07-04 1965-01-28 Heinrich Pierburg Fa Forearm joint cap, especially for longwall construction

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE502676A (en) *
FR993340A (en) * 1951-04-23 1951-11-12 Bochumer Eisen Heintzmann Support system for mining operations by size

Also Published As

Publication number Publication date
BE576433A (en) 1959-03-31
NL90361C (en) 1959-03-16
DE1110590B (en) 1961-07-13
DE1035602B (en) 1958-08-07
GB762667A (en) 1956-12-05
FR1218277A (en) 1960-05-10
FR1082249A (en) 1954-12-28
FR66328E (en) 1956-06-29
GB762750A (en) 1956-12-05
DE1043256B (en) 1958-11-13

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