Longines Weems Patent 2008734

Longines Weems Patent 2008734

Postby Craigbythesea » May 31st 2017, 3:13pm

I just picked up a Longines Weems Patent 2008734 at an auction and started researching the watch. I was fascinated by the story and thought I would share it. Professor Phillip Van Horn Weems is viewed as having a major impact on the design of early pilots’ watches and Weems is viewed as a man who contributed to the advancement of air navigation than anyone else in the early 1930’s. The Philip Weems story is well covered, including a nice piece in this forum and Hodinkee   -"The Science, History, And Romance Behind The Longines Lindbergh Hour Angle Watch".  https://www.hodinkee.com/articles/the-h ... ngle-watch.  The piece focuses upon his impact upon Charles Lindenberg and the Hour Angle Watch. It also mentions Weem's other inventions including the Second setting watch.  This is the watch in the Patent. 

Weem's Patent 2008734 Watch - refers to Philip Weems’ original registration of his design as a pilot’s navigational aid in 1935 “US Pat. 2008734”.  This Weems’ inventions is the second-setting watch.  At sea, celestial sights had to be taken with the aid of a hack watch which was set to the ship’s chronometer.  It was difficult, however, to set the watch exactly, which meant that it differed slightly from the chronometer, which in turn differed from Greenwich Mean Time.  Weems reasoned that the difficulty in setting the watch came from the fact that at the time it was almost impossible to set the second hand exactly.  However, if the second hand could not be set to match the dial perfectly, it might be possible to make the dial movable, so that the dial and the second hand were synchronized at the right time.  The fact that Weems’ father-in-law was a patent attorney helped him considerably in getting the idea patented, but patent it he did, and he had dozens of claims based on the second -setting watch patent. The patent was “US Pat. 2008734”, this referring to Philip Weems’ original registration of his design as a pilot’s navigational aid in 1935.  Please view the design and registration below.  You can see the design of the bezel and the claims made by Weems.  This design movable dial / bezel has influenced watch design since.  Please do view the patent the design and claims made by Weem's in the patent application are fascinating.

US Patent Office http://pdfpiw.uspto.gov/.piw?docid=0200 ... PN/2008734

Here are a couple of shots to the watch.

https://uk.pinterest.com/craigparkermai ... t-2008734/

The condition of this watch is good. The watch is running smoothly and keeping time well.   The case is in near perfect condition.  The rotating bezel mechanism works and sets smoothly.  The movement is the correct Longines  17 jewel 10l.  The movement is numbered 6576547.  Inside the case back interior is the signature “Cased and Timed in the USA by Longines”, together with the individual serial number for this housing, 858887, and the word “Keystone”.   There is patent on the dial. 

These watches are well document and there are a number of references to them including
a really nice piece on the how the rotating bezel landed on a diving watch, which discusses this watches' impact on watch design http://www.watchtime.com/blog/dive-watch-wednesday-how-the-rotating-bezel-landed-on-the-dive-watch/.
Gisbert Brunner’s “Wristwatches” devotes a full page (p. 274) to the reproduction of Philip Weems’ original drawings for this rotating bezel concept, describing it as an “apparatus for navigator’s time keeping”.
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Re: Longines Weems Patent 2008734

Postby koimaster » May 31st 2017, 10:50pm

Great information, thank you
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Re: Longines Weems Patent 2008734

Postby bobbee » June 1st 2017, 12:49am

That is a beautiful watch, unissued ones are not seen often! Different to the one in the patent/article which is for the Hour Angle


Here is a 1933 article about the Hour Angle.


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Here is a 1937 advert for the Weems and the Hour-Angle watches, among others.



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And a 1947 ad for the Weems. Used by Allied pilots during WW2, and highly collectible today.



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Re: Longines Weems Patent 2008734

Postby Craigbythesea » June 1st 2017, 2:53am

That is exactly it - the second setting watch in both pictures above. The second picture also shows the patent number shown on the watch I picked up. Wow.

Here is mine. The movement is also shown which is really beautiful as well.

https://uk.pinterest.com/craigparkermai ... t-2008734/
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Re: Longines Weems Patent 2008734

Postby bobbee » June 1st 2017, 3:38am

Just think, the tension screw that holds the bezel tight fetches big money as they are often missing.
SO BE CAREFUL! :)
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Re: Longines Weems Patent 2008734

Postby Craigbythesea » June 1st 2017, 3:51am

Great advise. I have tested that it is working but won't touch it again
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Re: Longines Weems Patent 2008734

Postby Falstaff » June 1st 2017, 6:57am

Fascinating - and congrats on the acquisition.
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Re: Longines Weems Patent 2008734

Postby Craigbythesea » June 1st 2017, 8:34am

Thank you Falstaff this is exactly why I wanted to share the story. Kind Regards
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