Kushlan, Max. [from old catalog] · Chicago, The Branch publishing company · leaf 40
isometric projection are employed here soas to show the view of the steel members making up FREE HAND DRAWING 35 the framing and the appearance of its upper and lowersupports. The traveling trolley riding on top of thechannel frame is indicated by its circular wheels and afew main lines of the… … FIG. 23. Such sketches are usually supplemented with notesgiving the names and the directions for each part ofthe mechanism as well as the principal dimensions, sothat by the aid of such a rough free-hand sketch, wehave a clear idea as to the operation of the machine 36 FREE HAND DRAWING
Mechanical drawing
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