NavList:

----- Original Message -----

From: Gary LaPook

To: NavList@fer3.com

Sent: Monday, November 05, 2007 7:38 PM

Subject: [NavList 3805] Re: Goerz and Bumstead Sun Compasses

Her are some links to more information on the Bumstead compass.

gl




http://www.antarctic-circle.org/E02.htm

It was devised by Cartographer Bumstead in collaboration with George Washington Littlehales, chief engineer of the Naval Hydrographic Office, after Byrd requested something better for his purposes than the magnetic compass. The Bumstead-Littlehales sun compass, which contains a clock and a latitude adjustment, works on the principle that the compass direction of the sun at any time of day depends on the latitude and the sidereal time.



Go to page 80 in the following book.

http://books.google.com/books?id=LFw4neT2nxwC&pg=PA80&lpg=PA80&dq=bumstead+compass&source=web&ots=fHe2lGydul&sig=klJ3X2GKZ8_4Kio2hGl09SLGftU#PPA81,M1
--
You can buy a copy:  http://bayarea.kijiji.com/c-For-sale-Other-Polar-Sun-Compass-W0QQAdIdZ28128489
glapook@PACBELL.NET wrote:

I will attach the scans to the next post.

gl

On Nov 3, 10:16 pm, glap...@PACBELL.NET wrote:
  

I have sever pages showing the Bumsted sun compass and I can scan them
in on monday and post them.

gl

On Nov 3, 10:40 am, Wolfgang Köberer

<koebe...@navigationsgeschichte.de> wrote:
    

Robert,
      

I assume that you are talking about about the Zeiss Ikon A.-G. Goerz-Werk
"Sonnenkompass" It is described in the German Patent Nr. 474100 (issued
26.3.1929). If you do not have access to the patent I can send you a scan
off list.
      

Wolfgang
  -----Ursprüngliche Nachricht-----
  Von: NavList@fer3.com [mailto:NavList@fer3.com]Im Auftrag
von Robert Eno
  Gesendet: Samstag, 3. November 2007 16:13
  An: NavList@fer3.com
  Betreff: [NavList 3751] Goerz and Bumstead Sun Compasses
      

  Hello fellow luminaries,
      

  Does anyone out there have any sources of information and/or photographs
of the Goerz and Bumstead Sun Compasses?
      

  Robert
      

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