United States Court of Appeals For the Ninth Circuit . / No. 492,371. i Sheets—Slieet 2 P. H. MACK. CASINO SPEAR. Patented Feb. 21, 1893. /if« VII -<^R S^. 331 United States Patent Office. IMlIirK 11. MACK, OF UKADFOUD, PENNSYLVANIA, ASSIttNOK in THKWKLI, SlPrLY COMPANY, OF SAME PLACK. CASING-SPEAR. SPKCIFICATION forming part of Letters Patent No. 4Q2,371, dated Fobiuary 21, filed April 33,1863. Serid iKo modcLl Im iiknowiillmtl, Patkuk M. n •( (ho Inittd StJilos. residiiiK la , ill tho county of McKonti, in the State 5 of Ioniisyl
United States Court of Appeals For the Ninth Circuit . / No. 492,371. i Sheets—Slieet 2 P. H. MACK. CASINO SPEAR. Patented Feb. 21, 1893. /if« VII -<^R S^. 331 United States Patent Office. IMlIirK 11. MACK, OF UKADFOUD, PENNSYLVANIA, ASSIttNOK in THKWKLI, SlPrLY COMPANY, OF SAME PLACK. CASING-SPEAR. SPKCIFICATION forming part of Letters Patent No. 4Q2,371, dated Fobiuary 21, filed April 33,1863. Serid iKo modcLl Im iiknowiillmtl, Patkuk M. n •( (ho Inittd StJilos. residiiiK la , ill tho county of McKonti, in the State 5 of Ioniisylvania, have invented ncwand use- ful Improvemeots in Cuaing-Spoars,of whichthe following is a apocification. My invention relates to that class of instru-ments forreraovingcnsingorsectionsof tubes |o from wells, in which divided slips are inount-o<I upon a mandrel capable of longitudinalmovement thereon and having a supplemon-tftl lower gripcounected with the slips for thepurpose of causing tliein to niovo upon the 15 spreading mandrel and secure the Initial holdupon the tube, whicli hold afterward is sufli-cient to secure that relative movomont be-twee
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