Samuel Cornette Collins (September 28, 1898 in Kentucky – June 19, 1984 in Washington, DC.) was an American physicist. He developed the first mass-produced helium liquefier, , acquiring the title "Father of Practical Helium Liquefiers." Collin's refrigerators, powered by a two-piston expansion engine, provided the first reliable supplies of liquid helium in quantities of several hundred to several thousand liters. Among other uses, these refrigerators were used to liquefy and transport helium and deuterium for the first hydrogen bomb explosion, Ivy Mike in 1952.