dmerican Patents for Jtpril, with Remarks.
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perties of a patentable article, novelty. Nnt to mar the affair, we will quote the passage. " I should recommend the spiral to be so formed as to have the ascent go round with the sun, like a back handed screw;--as nature inclines fluids, air, &c., to move, when in a spiral or circular manner, with the sun. And as it is as easy to make it ascend one way as the other, it would be best to let nature have her own way." The smoke from a steam engine furnace, &c., is to ascend up a pipe to some distance in the usual way; there is then an opening made in the side of the pipe, through wlfich the draught is to pass into a flue ascending spirally around the pipe as its shaft, or centre; an outer case covers the outer edges of the spiral thread, sn as to make an enclosed flue. This it is said, will give to the sparks, dust, &c., a centrifugal three, inclining them to fly offtangentially; and to enable them to do so, there are slats, or openings in various parts of the outer case of the spiral, which openings are covered by troughs, called receivers, leading downwards, in which the sparks, ashes, &c., are to be precipitated to the bottom, where they are received and retained until removed. The claim is " the combination of the spiral flue, with the outlets and receivers, constructed as above set fbrth, or in any other manner whereby a centrifugal tbrce is, or shall be, obtained," &c. We wish that this contrivance may have the effect of removing a great nuisance in rail road travelling, but we do not anticipate it, being apprehensive that hut a small portion of the sparks and ashes will leave the ascending current and find their way into the receivers. 54. For an improvement in the Tong, ues of Power Loom Shuttles; Comfort B. Thorp, Smithfield~ Providence county, Rhode Island, April 17. (See specification.) 55. For a Revolvi,g Hand Rake f o r haft or grain; Stephen Coats, Shoreham, Addison county, Vermont, April 17. This revolving hand rake consists of a rake head which is about six feet long, with teeth about two feet ten inches long, running through said head, and projecting out on opposite sides. To this head is affixed a pair of shatts, within which the person drawingthe rake is to walk, a strap passing in front of him to aid him in drawing. The rake head revolves on the hind ends of the shafts, in loops tbrmed by iron straps, there being catches to stop the head in a proper position tor raking, and a lever at the command of the operator, by which the rake can be disengaged when thlly loaded, and thus allowing it to revolve so as to bring the opposite row of teeth.intn action. T h e claims are tn the particular mode efcnnstructing the operating parts as described in the specification. 56. For a machine for crampi~,g, leather for lhe leg,s of boots; Jesse Van Winkle, Rochester. Monroe county, New York, April 17. This machine, in its general construction, is like several others, differing only in certain special points of structure, which we shall not attempt to explain. The claim is made to the ~ slides or slidin~ planes, with the projecting bars, or narrow plates~ tbr removing the wrinkles from tile leather."