Fry, Horace Pugh. [from old catalog] · Philadelphia · leaf 63
< Vu It - o U < Q 10 I- Q I i DH<oru < J u u zJ <£ X I 0^20 Io VJ<ZUh^ -Ny J Q !2 5a: z ^ u o < 0^1 (0 I o y uzu t u< Q. oa. .. u ^s Ui ?z -I J r u o in UJ H- < ^ M^ Jo o L 7 . ^^ 7 ^^^^ Z - 0^ ic Z ^Q. n UJ I • O «) I u !iJ 3 < u ^ ^ 4 t Hb J i_ X J. < <! LJ I z… … 61 8c Sharpens Practical Treatise on GearingGearing, are published by the manufacturers. and Pormulag in SCREW THREADS. 1. A helix or screw curve is the pathof a point moving on the surface of a circular cylinder, the motionof the point around the axis and paral-lel to the axis being uniform. 2.…
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
