History lesson for today-- Electrolux tools
The earliest patent file I know of using some sort of "Gleaner" is that of Gustaf E. Lofgren. Patent # 2,027,543. Filed Oct. 7, 1933 and patented Jan. 14, 1936. During this time the bar thingy at the bottom of the rug tool was patented by George. H. Cranmer. Patent #2,025,442. Date filed Jan. 22 1935 with the patent issued Dec. 24, 1935. Both would be for the Electrolux model XII (12).
Gusaf E. Lofgren was an electrolux fixture from the time the factory opened in Old Greenwich, Connecticut in 1933. His job was design and research, meaning that most of the patents for attachments, tools other devices like the ejection system were his. This means that the models XXX, XX and others were his. But not the famous model LX, that was the design of Leon P. Borkoski, patent filed May 4, 1951 and issued Oct. 6 1953. There were at least 5 designs for the rug tool you have shown. There were several for the model XXX and at least 2 for the LX.
For over 30 years Gustaf E. Lofgren and his crew turned out things like the Cord winder, B8 polisher, turbo polisher, (1947) and the Power Nozzle.
Most of my information is from my own patent research, while other information comes from the book "ELECTROLUX CORPORATION---
the first forty years." Lofgren was the Vice Predident of marketing at the time that book was written in 1964.
Alex Taber