GB Patent: GB-187,404,210
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| Improvements in circular saw benches and wood cutting machines worked by hand or steam power
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Patentee:
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| William Blackett Haigh (exact or similar names) - Oldham, England |
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Patent Dates:
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| Granted: |
Dec. 08, 1874 |
Espacenet patent
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Jeff Joslin
"Vintage Machinery" entry for W. B. Haigh & Co., Ltd.
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Description: |
| "This invention relates, first, to that description of saw benches in which the spindle carrying the saw works in bearings at the ends of a long collar forming part of a swing frame jointed to the framework, and provided with a slot for enabling the saw to be raised and lowered to suit the different thicknesses of the wood to be sawn."Instead of one feed wheel two feeders are employed, one adapted for light and the other for heavy work, and instead of having change wheels, diminishing wheels, having a constant number of teeth, are used."The shaft of the last diminishing wheel carrying the small feed wheel works in holes in a bracket cast or fixed to the swing frame, and on this shaft is fixed a pinion gearing into a toothed wheel working loose and having a boss formed at one end as a clutch, which can engage in a similar clutch at one end of a scroll drum working loose on the spindle of the toothed wheel, and connected by a cord or rope and hook to the timber to be sawn; and it is this drum which forms the feeder for heavy work when the two clutches are clutched together by means of a clutch lever, for as the drum revolves the timber is pulled forwards by the cord or rope, which coils in the scroll and gives a decreased speed of feed adapted for heavy work without change of gearing."The next part of the invention relates to machines having cutters fixed to revolving heads, and the improvement consists in fixing to the spindle of the cutters a flywheel, the momentum of which gives a steady motion to the cutters, and thereby prevents the waved appearance of the timber that at present occurs; and this improvement is applicable to all hand or power planing, moulding, or wood cutting machines, in which revolving cutters are used." |
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