You are just a troll. Go away! Compact is an original, designed at the request of Howard Hughes for use in his aircraft, specifically TWA which he owned back then ( Howard Hughes built TWA from a tiny nothing to a global giant, then weirded out on drugs in his old age and was booted by the TWA Board of Directors, who replaced him with someone who would run TWA into the ground, Carl Ichan ).. Since all the commercial vacuum makers were busy producing war material and it was literally illegal for them to make vacuums due to wartime mobilization laws and rationing. Howard Hughes approached a friend of his with an aircraft company who had helped him design his racing airplanes. Making it for an airplane got around the restrictions of mobilization and since aircraft engineers designed it, the design was unique, used a still unique magnesium-aluminum allow for lightness and was built to aviation standards of quality.
