So, I remember seeing this ad(below) quite a few times online, and always wondered what the "old vacuum" in the background was. I thought it was an artist conception, until I found this! Patented in 1915. Anyone have one of these? If the link doesn't work, it is US patent number 1,348,583
file:///home/chronos/u-8c25f51f2ec1b022b0587c95806bd25f7ecceb63/MyFiles/Downloads/Rosenfield%20Vacuum%20Patent
file:///home/chronos/u-8c25f51f2ec1b022b0587c95806bd25f7ecceb63/MyFiles/Downloads/Rosenfield%20Vacuum%20Patent
