Apparatus for tensile testing Patent
Apparatus for tensile strength testing of specimen by pressurized fluid
Wallace, E. D.↗
Engineering topics
Wallace, E. D.
Publications and source records attributed to Wallace, E. D..
Weld preparation tool for pipes and tubing
Improved scarfing tool consists of a mount-table, roller-guided assembly. It converts a conventional routing machine for relatively precise field preparation of pipes for welding.
Wallace, E. D.↗
Improved poppet valve provides positive damageproof seal
Soft-seat poppet valve provides positive closure against fluid without damage to the seating surface on repeated cycling. It incorporates two compressible soft rings and a retaining ring of hard metal. Sealing is effected when the poppet seat is forced into intimate contact with a mating surface on one of the soft rings.
Wallace, E. D.↗