Yes and no. Westinghouse Appliances was spun off and sold to the Electrolux Group of Sweden in the early 1970s. That was about the same time the Electrolux Group bought Eureka Company from William's Oil, their former parent and Frigidaire from GM. Most of the vintage Westinghouse vacuums you see in the US and Canada were made before the Electrolux Group bought them. However I have seen some modern Westinghouse branded vacuums sold abroad, particularly in Asia and as far as I know Electrolux Group of Sweden still owns the rights to the Westinghouse Appliances brand world wide. Keep in mind that the other branches of the Westinghouse family like nuclear reactors and jet engines are also separate companies. It gets confusing. Electrolux Group bought up some other US appliance makers like Tappan and Gibson.
In the late 1950s or early 1960s Westinghouse made a few canister vacuum models for the Kenmore brand.
Hope you don't mind if I make a few corrections about Westinghouse. Their plant in Mansfield, OH, where I grew up, was opened in 1918, and eventually became the headquarters of their Appliance Division. For many years ranges, refrigerators, washers, dryers, water heaters, and small appliances such as irons, toasters, percolators, electric skillets, and the famous Westinghouse roaster were all produced there. Vacuum cleaners were made at another plant in Springfield, MA. They never made vacuum cleaners for Sears Kenmore, those were made by Birtman Electric Co. in Chicago until Birtman was taken over by Whirlpool. They did however, make vacuums for Montgomery Ward in the late 50's and early 60's.
Refrigerators and dishwashers were transferred to another plant in Columbus, OH in 1954 and 56, and the small appliance lines that were made in Mansfield were moved to a plant in Byesville, OH in 1967, then sold to Hamilton Beach-Scoville in 1970. White Consolidated Industries bought the Westinghouse Major Appliance Division in 1975 and bought Frigidaire in 1979. Not long after, AB Electrolux bought the Tappan Company, also headquartered in Mansfield, and then bought White Consolidated in 1986, and the Mansfield plant was closed in 1990.
I worked at the Mansfield plant for 6 months in 1977, on the dryer floor. By that time the only appliances made there were washers, dryers, and ranges, the product name was changed to White-Westinghouse, and the name of the plant was changed to Mansfield Products, Division of WCI. I was a material handler, mostly moving body panels to the body welder or front panel welder.
Jeff