. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . y through all its parts. As the channel of a river flows faster than theshallow portions, or those near the banks, so does clay move through a die, the friction ofthe corners holding them back, while the center moves more freely. In the present machinethis dilliculty is overcome by the peculiar former. which is so shajjed as to facilitate theflow of the clay to the corners, and retard it opposite to the straigiil si
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . y through all its parts. As the channel of a river flows faster than theshallow portions, or those near the banks, so does clay move through a die, the friction ofthe corners holding them back, while the center moves more freely. In the present machinethis dilliculty is overcome by the peculiar former. which is so shajjed as to facilitate theflow of the clay to the corners, and retard it opposite to the straigiil sides of the die, the pro-jections being much larger opjiosite the larger diameter of the die (Fig. ;3). For very wideand thin bricks tlie resisting pnijcction is omitted wiiolly at the short diameter of the die. orat the edge of the bricks, the spreading of the clay outward to Ihe edge, ratiier than into thecorners only, l)eiiig facilitated. By this means the angles of the bar of clay are re-enforcedand made very solid and sharp, thus insuring square and well-defined corners to the former is secured to the screw-case by a hinge and swinging bolt, so that it may be. Fio. 3. —The Chambers brick-machine—the dies. quickly swung open for the removal of stones. This swinging bolt is secured to the case bya pin of just sullicient strength to hold under normal conditions, and when undue straincomes from hard clay, etc., it yields, thus forming a safeguard against accidents arising fromimproper feeding. As the bar of clay issues from the forming-die it passes through a siuidl chamber filledwith fine, dry sanil, which adiieres to tiie surface of the bricks. Tlie surplus sand is in the (•liaiuber by swinging elastic scrapers, wliich allow the liar to escajie with itsadhering saml. This sanded surface; of the clay bar prevents the bricks from stickingtf)gether on the l)arrows or in (he iiacks. or on the drying-cars, and improves them in colorwhen burnt. All clay h
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
