1 Attachment(s)
F. Sengpiel Patent Padlock History
F. SENGPIEL PATENT In the last 5 years I have acquired seven of these locks, numbers 1,2,3,4,5,9-and one without a number. Also, a #12 is shown by a collector on the site MyViMu.com. They appear in at least two sizes: 3.2" (80mm) diameter, 3.6" (92mm) diameter. US and European patent searches, so far, yield nothing. I have read it is "from the period 1890-1920, German". The UW-Madison Kurt T. Wendt Library, Patent Department, is presently doing some research. Any help in identifying the manufacturer, country, patent number, patent date, or other historical tidbits would be greatly appreciated.