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Scientific American, Vol. 57, No. 12 (1887) (1887)
leaf 4
pplying the wrench to a pipe curacy and uniformity are thus se- this lever is pressed down upon the handle by the cured, and the operation can be hand, tightening the toothed jaws upon the pipe in most expeditiously performed. proportion to the force applied. ooo For further information relative to… … having been saved from ijire, as is © 1887 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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