A practical treatise on artificial crown- and bridge-work . siz*. than is shown in the mandrels. With this ap[>liance collarscan !)(, evenly and accurately reduced in size at the edges, with-out burring or buckling. The illustration is actual size. The collar pliers (Fig. 492) are for contouring the collars toshape, one beak being made convex and the other concave to 250 ARTIFICIAL CROWN- AND BRIDGE-WORK. Fig. correspond. \Vith this appliance the slightest changes requirLMlin the contour of the collars are easily made. About a half-inchfrom the extremity of the concave beak a smalll)a
A practical treatise on artificial crown- and bridge-work . siz*. than is shown in the mandrels. With this ap[>liance collarscan !)(, evenly and accurately reduced in size at the edges, with-out burring or buckling. The illustration is actual size. The collar pliers (Fig. 492) are for contouring the collars toshape, one beak being made convex and the other concave to 250 ARTIFICIAL CROWN- AND BRIDGE-WORK. Fig. correspond. \Vith this appliance the slightest changes requirLMlin the contour of the collars are easily made. About a half-inchfrom the extremity of the concave beak a smalll)ar of flat steel is attached to it by means of ascrew. The free end of the bar has a minuteprojection upon one face, the other being rein-forced to fit into the concavity of the beak. Inthe center of the face of the convex beak is adepression, into which the projection on thesteel bar strikes, making a very eflicient punchfor forming guards or stops to prevent the col-lars from being forced too far under the depression in the convex beak beingslightly larger than the projection or punch,the metal is not cut through, but merely raisedon the side opposite to the punch. The punchattachment being pivoted can be swung to oneside when not in use. Fig. 493 is a mallet or hammer, with steel faceand horn peen. The handle is nine inches long. One of the appliances required lis a leadanvil, which being only a piece
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectcrowns, bookyear1889
