Blueprint reading; a practical manual of instruction in blueprint reading through the analysis of typical plates with reference to mechanical drawing conventions and methods, the laws of projection, etc . ened to a chisel edge by rubbingit against a bit of sand paper or a fine file, and the corners slightlyrounded. In drawing the lines the draftsman should place the chiseledge against the T-square or triangle, thusenabling him to draw a fine line exactlythrough a given point. If the drawing is notto be inked, but is made for tracing or forrough usage in the shop, a softer pencil, 3Hor 4H, may
Blueprint reading; a practical manual of instruction in blueprint reading through the analysis of typical plates with reference to mechanical drawing conventions and methods, the laws of projection, etc . ened to a chisel edge by rubbingit against a bit of sand paper or a fine file, and the corners slightlyrounded. In drawing the lines the draftsman should place the chiseledge against the T-square or triangle, thusenabling him to draw a fine line exactlythrough a given point. If the drawing is notto be inked, but is made for tracing or forrough usage in the shop, a softer pencil, 3Hor 4H, may be used, so as to make the linessomewhat thicker and heavier. The lead forcompasses may also be sharpened to a pointalthough some draftsmen prefer to use a chiseledge for the compasses as well as the pencil. In using a very hard lead pencil a light pres-sure should be used as otherwise the chiseledge will make a deep impression in the paperwhich cannot be What little erasing is necessary in making drawings,should be done with a soft rubber. To avoid erasing the surroundingwork some draftsmen use a card in which a slit is cut about 3 inches Fig. 2. Pencil Sharpenedto a Cliisel Point.
Size: 2050px × 1219px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectmechanicaldrawing
