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xc-patents:xc-97

Patent XC-97: 1846-08-10, New method of constructing planing machines for planing boards, planks, &c.

X Number Date Inventor City Title
XC-97 1846-08-10 Charles Midgley Montreal, QC Canada New method of constructing planing machines for planing boards, planks, &c.

Comments

So far we have been unable to find confirmation that Midgley ever manufactured his planing machine. “The construction of this invention is as follows: a suitable frame is made of cast iron or other material; at the sides are posts which are connected together by a sufficient number of wooden braces; on the inside of each of the side pieces are guiding ways, for the purposes hereinafter described; a series of castings or metal plates are made, which form a section of the carriage, on which the board or other article rests; through the centre of this plate, from end to end, are apertures made so as to leave an open rack, into which cog-wheels play; each of the plates has two strips of wood affixed to its upper side, one on each side of the rack, and covering the rest of the surface of the plate; the plates move along horizontally, guided by the ways under the revolving cutter, at which point they are sustained by ribs supported in, and attached to the frame, they slide over these and form a solid bed for the stuff to be planed on, at each end of the machine; the guide ways descend and form a groove, which allows the outer end of the plate to descend about half way down to the position they assume on returning, at which time the inner end of the plate arrives at the cog-wheel, situated the distance of the length of a section plate from the end of the machine; and in the guide ways there is a semicircular branch concentric with the said cog-wheel; this arrangement permits the section to fall and be carried under the cog-wheel, it being kept in gear by said guides. At the opposite end a similar arrangement is made, for the purpose of raising the sections, by means of another wheel; a third feeding cog-wheel is placed at the centre, by which the segments are moved, and this is connected with the moving power in any convenient way, so as to adjust the feed; there is a bar affixed to the frame at each end that extends the whole length thereof directly over the racks above named, in the sections, and of the same width as the space between the strips of wood that cover the plates, into which it fits, and forms a level even surface, under the plane, to support the article to be planed; above the centre of the bed there is a gallows frame bolted to the frame, which stands in an inclined position, within which, or on the upper side of which, a frame or gate slides, in which the cutter is hung; the cutter is of ordinary construction, having three knives in it, but with double, instead of single irons, as are generally used; a guiding roller is attached to the gate, by strong springs, on a level with the lower line of the circumference of the cutter, and in front thereof behind the cutter; when the stuff to be planed is entered there is another roller that is kept down upon it with weights, and between which and the bed or carriage the stuff is held; a shield plate is put behind the cutter, to prevent it clogging with chips; the gate with the cutter can be graduated to any height, while the machine is in operation, by means of a screw that is attached to the centre of the gallows and turns in a nut in the gate, which moves it up and down; it is obvious that there can be two cog-wheels instead of those below, one on each side, which will save the necessity of an opening in the centre.”

Information Sources

(To be filled in.)

xc-patents/xc-97.txt · Last modified: 2019/05/25 00:16 (external edit)