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Transactions of the Institution of Mining Engineers Volume 5 (Paperback) Loot Price: R794
Discovery Miles 7 940
Transactions of the Institution of Mining Engineers Volume 5 (Paperback): Institution of Mining Engineers
Transactions of the Institution of Mining Engineers Volume 5 (Paperback): Institution of Mining Engineers

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Transactions of the Institution of Mining Engineers Volume 5 (Paperback)

Institution of Mining Engineers

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Loot Price R794 Discovery Miles 7 940 | Repayment Terms: R74 pm x 12*

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1893 Excerpt: ...the eastern or low side of the pit upon which the other removable timbers rest. Tt is notched to receive the rails, and also slightly notched to go a little below the main timbers in the centre. It is earned when in position by the timbers F F. B B are the timbers on which the cage rests when at the bottom of the pit; they are fitted with spikes, firmly fastened to them with a collar underneath and a nut at the top, at each end to fit into the timbers below them, and serve to keep the timber E from moving out of its place. Those at the basset side are firm and immovable. When the cage is at rest on these timbers, its bottom is level with the top of the lorry. The timbers to be removed in order to commence sinking are A, B, C, D, and E, the others remaining fixed. In order to allow for the passage of the lorry it was necessary to provide for the removal of three of the offtakes, or substituted guides at the eastern or dip side of the pit. For the purpose of keeping the top-ring of the cage in the offtakes, joints G were inserted (Fig. 2), the bolts of these joints being taken out when needful. The bottom of these loose removable pieces were in each case let into iron sockets, so as to render them perfectly firm when drawing the coal. Fig. 3, Plate XL, is a plan of the shaft-bottom at the Silkstone seam when covered over. In order to avoid any strain whatever on the cage by the weight of any material drawn from the sinking-shaft a large shackle (Figs. 4 and 5, Plate XL) was inserted in the large ring which carries the two centre chains of the cage and between them. Two large links of l inches iron (4 inches inside) made the connexion with two chains of inch iron, which pass down through the bonnet of the cage on each side of the central hoop of t...

General

Imprint: Rarebooksclub.com
Country of origin: United States
Release date: March 2012
First published: March 2012
Authors: Institution of Mining Engineers
Dimensions: 246 x 189 x 18mm (L x W x T)
Format: Paperback - Trade
Pages: 340
ISBN-13: 978-1-130-15679-9
Categories: Books
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LSN: 1-130-15679-6
Barcode: 9781130156799

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