Machine drawing; a practical guide to the standard methods of graphical representation of machines, including complete detail drawings of a duplex pump and of a direct-current generator . bout 1-inch slope in 6 inches. Thequestion as to whether letters should incline backwards, forwards,or stand vertical, does not enter this discussion. Character is notaffected by the slope. The student may choose whatever comesmost natural to him, but having chosen, the character of his workwill be spoiled if he varies it. The most difficult of the three is thevertical style; hence most draftsmen incline thei
Machine drawing; a practical guide to the standard methods of graphical representation of machines, including complete detail drawings of a duplex pump and of a direct-current generator . bout 1-inch slope in 6 inches. Thequestion as to whether letters should incline backwards, forwards,or stand vertical, does not enter this discussion. Character is notaffected by the slope. The student may choose whatever comesmost natural to him, but having chosen, the character of his workwill be spoiled if he varies it. The most difficult of the three is thevertical style; hence most draftsmen incline their letters. Thebackward slope is used on the plates of this shop drawing paper,thus giving the student opportunity to compare with plates in theearlier books, and follow his preference. The effect of change of style, height, and slope is shown inFig. 122. Attention is called to Fig. 123, which is a sample title,in which these points are corrected. 180 MACHINE DRAWING Principal Titles. The principle title of a drawing should con-tain at least seven items: (1) name of principal details shown; (2) name of machine; (3) firm name sih am r,vi mnm ~ STIiAM CY\\N\)FP ~\6-tt^-\g DUPLhX PU^W. Fig. 122. Sample Titles Showing Effect ofNon-Uniformity of Lettering and location; (4) scale of draw-ing; (5) date of completion; (6)draftsmans signature; (7) filingnumber. To these are often addedothers, but for purposes of filingand reference the above at leastmust be put on. The filing num-ber may or may not be put inthe title frame, but it is really apart of it. It is often put in the margin below the title. An arrangement of title should be established and then followedexactly, without variation either as to location on sheet or detailmake-up. Abbreviated words are always permissible in titles,provided the meaning is clear. Special care must be taken inpunctuation, however, as a title, whether abbreviated or not, hasan unfinished appearance if the periods, commas, and other necessarypunctuation
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Keywords: ., bookcentury1900, bookdecade1910, bookpublis, booksubjectmachinery
