in the center row are equally spaced guidelines.The two outside rows are used for drawing bothcapital and lowercase guidelines. The left rowgives a proportion of 3 to 5 for lowercaseand capital letters, and the right row gives aproportion of 2 to 3.The design of the Ames lettering instrumentpermits you to use it for lettering ranging in heightfrom 1/16 to 5/16 in. These various heights areattainable by rotating the circular disc within theouter section of the instrument. The numbersalong the bottom edge of the disc are used to setthe instrument for a particular letter height. Anumber aligned with the index line on the outersection of the instrument indicates the height ofthe lettering in 32ds of an inch. In figure 3-43,view B, the number 8 is aligned with the index;therefore, the distance between the capital letterguides produced by this setting is 8/32 in. or 1/4in.By standing the Ames lettering instrument onits greater sloping side, you can use it fordrawing guidelines for inclined lettering that slopeat an angle of 67 1/2 degrees with the horizontal.(See the upper-right portion of fig. 3-43, view B.)Spacing Between GuidelinesThe spacing between two lines of capitalsmay vary from one half of the height to the fullheight of a capital. Two thirds of the height iscustomarily used.The spacing commonly used between lines oflowercase letters is shown in figure 3-44. The spaceindicated by the letter S equals the vertical distancebetween the waist line and the cap line.VERTICAL SINGLE-STROKEGOTHIC LETTERINGThe generally accepted style of lettering forSEABEE drawings is the single-stroke Gothic45.214Figure 3-44.-Spacing between lines of lowercase letters.45.832Figure 3-45.-Vertical single-stroke Gothic capitals andnumerals.vertical (fig. 3-45) or inclined lettering. The termGothic refers to the style of letters. Gothiclettering is the simplest style to make and theeasiest to read on a drawing. Single-stroke meansthat each stroke of the letter is made by one strokeof the pencil. Figure 3-46 shows the basic strokesrequired for single-stroke lettering. Verticalstrokes are drawn from the top down with an evenfinger movement. (Inclined strokes are drawn inthe same manner.) Horizontal strokes are drawnfrom left to right with a complete handmovement, pivoting at the wrist. Curved strokesproceed from above downward, using a combinedfinger and wrist motion. Lettering strokes aredrawn, not sketched. It is important that you usethe correct direction and sequence of strokesrecommended for each letter.The required shapes of vertical single-strokeGothic letters and numerals will be shown anddiscussed in the next several figures andparagraphs. To emphasize the proportions of theletters and numerals, each character is shown ina grid, six units high. The grid serves as a referencefor comparing the height of the various charactersin proportion to their width as well as locatingthe individual strokes that compose the characters.3-30
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