Surface Machinery and Methods for Oil-Well Pumping

BULLETIN 224 PLATE XIX

A. POWER OR JACK-PLANT HOUSE, BIG MUDDY OIL FIELD, WYOMING:
a, SHACKLE LINE RESTING ON FRICTION-POST SUPPORTS

B. a, TAKE-OFF POST OF HEAVY BRACED TIMBER; b, TWO-POST PENDU-
LUM; c, COMBINATION BUTTERFLY

C. a, HEAVY TIMBERED POST CONCRETED IN PLACE WITH SHACKLE LINE
RUNNING IN HOLE BORED THROUGH IT; b, ROCKER USED AS HOLD-UP;
c, BUTTERFLY MADE OF TIMBER AND ATTACHED BY BEARINGS TO HEAVY
TIMBER POST; d, ATTACHMENT FOR SHACKLE LINE; e, END BRACE

BUREAU OF MINES

George, H. C. Surface Machinery and Methods for Oil-Well Pumping. Washington D.C.. UNT Digital Library. http://digital.library.unt.edu/ark:/67531/metadc12407/. Accessed October 26, 2014.