Johnston, Philip Devereux, 1855- · New York, D. Williams Company · leaf 16
es a conical pointed screw ineach side, the points of the screws working insinks in the compass head. The yoke is furtherprovided with a handle with which to manipulate thetool. The head joint should move freely and evenlythroughout its entire range—not stiff at one point and A MANUAL OF MEGHAN… … TONGUE JOINT. riVOT JOINT. illustrations are shown two good forms, thelong and strong pentagonal shape and theround shank with steel feather or tongue.The former should fit snugly into a socketof the same shape and be held there by aset-screw. The latter (the round shank) isheld by the spring of…
Mechanical drawing
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