Brooke Thank you for that - and thanks Fred for sending me the file off-list.
>From that I now see that the US Patent 946,223 is actually for a design completely different from UK 18,568 of 1911 and the instrument I saw! As I understand that he made at least two other known mean time dials on yet another principle, Homan would seem to have been quite a prolific inventor in the field. Perhaps he took out other US Patents? But as you say apparently one can't search for the inventor on-line at that date. I'll have a look, in case, for other UK ones using good old paper-based technology! Andrew James N 51 04' W 01 18' -----Original Message----- From: Brooke Clarke [mailto:[EMAIL PROTECTED] Sent: 31 July 2002 17:03 To: sundial@rrz.uni-koeln.de Subject: Re: Heliochronometer by Homan All US patents are on line. Sources for free on line TIF viewers can be found under help\How to Access Patent Full-page Images. Older patents can only be accessed by traditional US class number or patent number, none of the other search methods will work. -
