Page:Federal Reporter, 1st Series, Volume 9.djvu/172

 CONSOLIDATED MIDDLINGS PURIFIER CO. V. GXJILDEB. 157 �and determine whather defendant is a trespasser, an examination of the Gnilder patent and reissue is necessary. �Guilder's patent — reissue No. 8,386 — claims: �"(4) The combination, with a' reciprocating riddle or shaker of a» biush moving transversely across the entire under surface of the riddle, and inde- pendently of the movement of said riddle, substantially as and for Ihe purposes s«t forth." �In his specifications he states — "That his invention has relation to machines for purifying flour and mid- dlings, wherein a suction fan and adjustable suction spouts are arranged over a riddle and endless conveyers, arranged benoath the riddle. * * * It also consists in the employaient of detachable brush carriers or brush holders, which hold the brushes in contact with the under side of tho riddle durinaf the upper part of their revolution." �" It also consists in giving to the said brushes a continuous transverse motion across the bottom of the said riddle." �He afterwards describes the function of the brushes : , "Beneath the riddle, C,is a transverse division, H, which leaves * * * a space, j, on one side of it, for the material, which passes first through the rid- dle and a space, j prime, for the coarser material, which passes afterwards ing brushes, which are arranged to sweep across the bottom of the riddle clotb, from side to side, so that they move at right angles to the material in its passage over the riddle, thus avoiding the mixing of the different grades of the material and keeping the cloth clear." �This patent is for a new combination of old elements, and the brushes are so arranged that the meshes of the riddle cloth are kept clear, and at the same time the brush, moving transversely at right angles to the flow of the material, prevents the mixing of the coarser with the finer middlings. In other previous cpmbinations the brush, moving in the direction of the flow of the middlings, would carry some of the coarser middlings with it and deposit them in the com- partment containing the finer middlings. �In Guilder's patent. No. 225,218, issued in March, 1880, which is the machine manufactured, and is alleged to be substantially the old patent, reissue 8,386, with some additional contrivances, he claims: �•' (5) The combination of the reciprocating boit, Gg, and transversely moving brush, K, having a longitudinal reciprocating motion, substantially as and for the purpose described." �In the specifications he describes the operation of purifying mid- dlings in the machine, and the function of the various contrivances and mechanism used, which it is not necessary to set forth, except what is said about the brush, which is this : ��� �
 * * *. In each space or compartment (J, or J prime) are single-row dust-