Specification of George Thomson and James Elms : machinery for cutting and tying up fuel.

  • Thomson, George.
Date:
1857
Catalogue details

Licence: Public Domain Mark

Credit: Specification of George Thomson and James Elms : machinery for cutting and tying up fuel. Source: Wellcome Collection.

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    » , v - Thomson Q Elms Improvements in Machinery for Cutting and Tying up Fuel. which the blocks of wood rest, to support and guide them to the top of the chopping block, x, x, are similar guide plates on each side of the carrying away band h. x1 an inclined trough for the purpose of guiding the wood while falling from the cutters fairly on to the band h. The action of the machine is as follows :—Motion being communicated to the cutter wheel, carrying away 5 band, and feeder, in the manner already described, blocks of wood sawn to the required length are placed upon the feeding band, which carries them up to the cutters, the speed of the feeder being so arranged by varying the diameters of the several pullies. In the machine shewn in the Drawings eight cutters are placed upon the wheel. The speed of the feeder is so arranged that it advances 10 four inches to each revolution of the cutter wheel, so that supposing the blocks to be three inches broad, they will be cut into slips or slabs six inches by three inches, and half an inch thick, to be carried away on the band h to a second machine indentical in construction with that already described. Six of these slabs must then be taken up by the person in attendance and placed 15 edgeways on the feeding band, in the manner shewn in Figure 9; this second operation would reduce the wood to pieces each six inches long by about half an inch square, ready to be tied up into bundles for sale. It will be evident to a mechanic that the machine described may be varied in the details of its construction; and sometimes in combination with the cutters k, k, on a wheel, we employ portions of circular saws to make a cut at right angles with the cuts made by the cutters k, and thus would the use of two machines in succession be avoided. This will readily be understood by reference to Figure 17. The second part of our Invention consists of certain improved machinery to 25 facilitate the operation of tying up the bundles of wood for the convenience of sale. Figure 18 represents a side elevation; and Figure 19 a plan or top view of the machine. Figure 20, an end elevation. Figure 21, a horizontal section of a portion of the machine taken through the centre of the cells wherein the wood is placed to be compressed and tied up. Figure 22, aSO transverse section through the machine at A, B, Figure 18. This view repre¬ sents the upper compressing frame raised. Figure 23 a transverse section, the same as Figure 22, excepting that the compressing frame c is forced down close on the body of the machine. The action of the machine is as follows :— The end of the cord on the rollers a, a, is passed along the tops of the grooved 35 standards b, 6, 6, and secured at the opposite end of the machine by the small pins c, c. The machine being in the position shewn at Figure 22, with the upper frame c slightly raised, the boy or person in attendance on the machine then passes his hand into the cell No. 1, and draws down the cord temporally.