Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    or...
       
    Reply
    Re: Centring Error Detector
    From: Brad Morris
    Date: 2014 Jan 21, 22:47 -0500

    Hi Don

    I don't know how you are getting the UK Patent reprints.  Perhaps you can show us how.  Until then....

    This patent: Apparatus for testing the centering of divided arcs of circles
    United Kingdom Patent 316438-A  is a valuable device that uses prisms to let a navigator (not a calibration house) test his arc.  Its what Frank and Alex were briefly chatting about 7 years ago.

    The links from back then do not work now.  Would you mind terribly?

    Brad


    I half expected the link to the 7 year old email to show.  It did not.  I used the fer3.com site to reply. 

    http://fer3.com/arc/m2.aspx/Centring-Error-Detector-FrankReed-jan-2007-g2047

    On Jan 20, 2014 7:37 PM, "Brad Morris" <Bradley.R.Morris---.com> wrote:

    Hi Frank

    Here's a 7 year old post that caught my eye.

    It describes a method that permits you to measure the arc error. It all makes sense to me but I'm trying to figure out how the prism is aligned to the optical path assigned to the horizon.

    Would you happen to have a copy of the patent?

    Alex,

    you mentioned that this equipment was offered by Heath and you had the catalog / book for it. Do you have it still?

    Brad
    ----------------------------------------------------------------
    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
    ----------------------------------------------------------------

    View and reply to this message: http://fer3.com/arc/m2.aspx?i=126588

    View and reply to this message: http://fer3.com/arc/m2.aspx?i=126590

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.
    Email:

    Email Settings

    Posting Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site