3/4- or 1-oz bottles of black, red, and green inkare found in the standard draftsman kit. Largerbottles are available for refilling the smallbottles. The stopper for a small ink bottle isequipped with either a squeeze dropper or acurved pipette for filling pens.When you are working with ink, always keepthe stopper on the ink bottle when you are notfilling the pen, and keep the bottle far away fromyour drawing. Nothing is more frustrating for adraftsman than to spill a bottle of ink on afinished drawing. Special bottle holders areavailable to minimize this hazard. If you do nothave a bottle holder, it would be to youradvantage to devise your own.OTHER TOOLSMany tools other than the ones alreadypresented in this chapter are currently used tohelp create technical drawings. A variety ofdrafting machines (not in the draftsman kit) areavailable at several shore-based support activities.Dependent upon the requirements of thatparticular activity, an EA assigned to staff orindependent duty may also be exposed to a moreadvanced and sophisticated computer-assisteddrafting method.The standard drafting machine combines thefunctions of a parallel ruler, protractor, scales,and triangles.Various drafting operationsrequiring straight and parallel lines may beperformed advantageously with a draftingmachine.The majority of drafting machines areconstructed so that the protractor head may bemoved over the surface of a drafting table withoutchange in orientation by means of a parallel-motion linkage consisting of two sets of doublebars. Figure 2-33 shows a rigid metal connectinglink or arms, commonly called pin-joint linkage.Another type of drafting machine has two steelbands enclosed in tubes working against oneanother (fig. 2-34) (although this type may also45.137Figure 2-33.-Drafting machine with rigid arms.2-26
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