It sounds like an exotic tropical bird but refers to a no tie screw knob. It was sold by the Paragon Electric Co. and is called the Paragon Knob Insulator. It falls under patent US965,723 July 26, 1910. I have several of these and none are marked. Elton Gish has one on his webpage that is marked Patent Pending. That is a confusing statement because it states that a patent for the design is in the process of being issued. Many companies used this though to promote there product even if they were not applying for a patent. The object being someone would chose there item over something as not being patented. Anyways a patent was issued to this company but who made the pieces is not known, sort of. In Jack Tod's book Electrical Porcelain of The United States he has a picture of a catalog page from Porcelain Products Inc. showing the Paragon Knob. I wish I knew the date of that page but it is not shown. When viewing my collection, I noticed a difference in one of the knobs compaired to the others and I think it was made by Porcelain Products Inc. The piece on the left has an unglazed bottom, sharp edges on the bottom top, a bigger recess in the top where a screw would go. The piece on the right is slightly smaller, has a glazed bottom, rounded edges on the bottom top, and slightly smaller recessed hole in top. It is also more refined like modern porcelain pieces. This is why I think it was made by P.P.Inc. Who knows who made the other style. Could be a number of porcelain companies but somewhere down the line P.P.Inc. gained the rights to make this item. My guess is maybe Findlay Electric Porcelain Co. or General Porcelain Co. when they aquired Brunt Porcelain Mfg. Co. made the pieces before. Then P.P.Inc. merged with these companies in 1928. I have a 1928 P.P.Inc. catalog but it does not show this nail knob. . Who knows . Time will tell someday. Awsomly neat pieces anyways.