NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Brad Morris
Date: 2014 Jan 21, 19:57 -0500
Thanks Don. Amazing how closely the actual manufactured item resembles the patent drawings. Take a look a the lamp. It looks like the person who drew the patent had the device in front of them. Just to be clear to others, this artificial horizon is *not* included in Worsley's kit.
In so far as the greatest angle "patent" prior to 1900? It may just be marketing but competitors would figure that out in 21 years (by 1921) and attempt to subvert it. If it didn't exist (the patent that is), then the competitors would figure that out too. Then a marketing ploy would backfire. We research our competitors patents on a regular basis. Its highly likely that Heath's competitors did the same. I think its out there...hiding!
Brad
Brad wrote: Thanks for that. The illustration shows the clamp stamped with "patent greatest angle clamp". That implies that (1) there *is* an earlier patent than 1921 and (2) the sought after patent proceeds 1900.
BTW, does anyone have or have seen that artificial horizon telescope? That's sweet!Here is the 1896 patent for the artificial horizon telescope (attached).
However, I can find no evidence of a pre-1900 patent for a greatest angle clamp. I still suspect that the stamping was just a marketing ploy, and had no legal basis.
Don Seltzer
----------------------------------------------------------------
NavList message boards and member settings: www.fer3.com/NavList
Members may optionally receive posts by email.
To cancel email delivery, send a message to NoMail[at]fer3.com
----------------------------------------------------------------
Attached File:
(GB189606475A.pdf: Open and save or View online)
