shown in Fig. 1, comprises a body TOOL FOR WITHDRAWING CASINGS FROM WELLS experienced draftsman. A very useful invention, portion having near its lower end a lateral projection A tool has recently been invented by Mr. S. Bennison, provided with a slot to receive a saw-tooth for the pur- of… … ^VV block acts to spread the clutch jaws, sinking their teeth into the inner surface of the casing section, as A SIMPLE SAW-TOOTH TOOL. IMPROVED DRAWING COMPASSES. shown in Fig. 2. Thus a firm grip is secured and the section may be drawn up upon the application of suffi- cient power. To loosen the…
Patents · Tinning · Tin · Feet · Turbine · Horse power · Scientific American · Engine room · Square feet · Tin plate · Power house · Steam turbine · Gas engine · Torpedo boat · Wedge block
Internet Archive · Public domain (published before 1931). Free to use for anything.
