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  1. burt

    Dan Weiss

    I spoke with Danny yesterday for about 30 minutes. He assured me he is being well looked after. Lately he has had some issues with storm damage of his home and some others. He knows people on this board care about his welfare and said "not to worry too much about him". I urged him to write a few...
  2. burt

    Dan Weiss

    Well I see you figured out how to get on the board. I told you that you could do it! Like I said everything only looks different. I'll send you a "regular email" and we will get you up and running. Your friends here missed your posting so now you are back on the board!
  3. burt

    Dan Weiss

    Wow....your doing pretty good! It took me nearly 3 years to convince him Adams and Perry made a watch. On a serious note thank you so very much for contacting Danny. I was going to ask for your personal contact information and Marcus said he would notify you. I hope this works out and you can...
  4. burt

    Dan Weiss

    Thank you all for thanking me but most of all for your sincere interest in our friend Danny! For those of you who may have left a message on Dan's answering machine and he didn't get back please consider he is 102 years old and recovering from what I expect is the trauma of loosing his...
  5. burt

    Dan Weiss

    I forgot to mention that Johnnie II is doing well and keeping Dan very good company!
  6. burt

    Dan Weiss

    To all who inquired: I just got off the phone and had a very nice conversation with Danny.(He called me back after I contacted his nephew Stephen.) I passed on to him how many of you inquired as to his welfare and your concerns to help out. Dan wanted me to say to all of you how very thankful...
  7. burt

    Chronometry: Anyone know when Mercer's switched detents?

    Allan, As didn't say anything about it in "my" post how did you guess about the O.C.D.? :) Oh by the way shouldn't look like this? :) On a serious note I can't imagine why Tony Mercer would include that picture and then draw a clear line of demarcation (1937) if it were not for a major change...
  8. burt

    Chronometry: Anyone know when Mercer's switched detents?

    Dewey, I remembered you asking this question and today was looking for something else and I think I stumbled on to the answer? Pictured on page 295 in Tony Mercer's book "Chronometer Makers of the World" is pictured (drawn) A Mercer detent marked pre 1937. My book is marked "revised edition" so...
  9. burt

    Chronometry: Kuhn Selectable Break Ckt (M21)

    As we are addressing the "selective" break circuit chronometer I thought I would attempt to clarify a few points. The first being that there are actually two types of surveying, land and water. With "land navigation" governments or authorities who wish to define their own areas, borders etc.and...
  10. burt

    Chronometry: Kuhn Selectable Break Ckt (M21)

    It's in "The Observatory" That is a journal that has been published from 1877. The publisher is "Editors of the Observatory" in England ISSN 0029-7704 and it comes out now every two months. We get it at our Carnegie library in Pittsburgh but I know I found that information on line.My notes...
  11. burt

    Chronometry: Kuhn Selectable Break Ckt (M21)

    For those who did not view the Sidereal thread in the second picture is the transit instrument at the U.S.N.O. and a precision regulator in the background of the photograph that Illustrates what Doc Jon was referring to when he posted. The first picture shows the astronomer at the transit...
  12. burt

    Chronometry: Kuhn Selectable Break Ckt (M21)

    Perhaps these pictures better explains and supports my opinion. The first picture is of the Lick Observatory which was founded in 1888. You can see the various telescope domes scattered throughout the property. The second clearly shows the "clock room" location next to the smaller dome in the...
  13. burt

    Chronometry: Kuhn Selectable Break Ckt (M21)

    Most observatories were not establish to acquire and transmit accurate time. Those that were most certainly used regulator clocks in conjunction with chronographs and transit instruments. Most observatories have multiple telescopes located sometimes in a single large building or scattered on the...
  14. burt

    Chronometry: Kuhn Selectable Break Ckt (M21)

    Hey Brother, Nice research and a second source conformation on Frodsham as making the second instrument.in 1868-69. As I believe I stated before these instruments, the break circuit chronometers, were developed for astronomers.( Frodsham made the first clock and chronometer for Allegheny...
  15. burt

    Chronometry: Kuhn Selectable Break Ckt (M21)

    A question and observation. Does anyone have a Hamilton BC chronometer that is marked 15 jewels as Whitney wrote they are? Tom's example is marked 14 so it was probably selected to be modified after the plates were finished? The ledgers only say Mod.21 85 size and no mention of jewel count on...
  16. burt

    Chronometry: Kuhn Selectable Break Ckt (M21)

    Doc, Yours looks like it's very similar to the one in Whitney's book. Very nice and thanks for posting! I checked 2E11834 and saw the production 1948 date and went to the (64-XXX) U.S. government. As I suspected no additional or special information was noted in the Hamilton ledgers, yet...
  17. burt

    Chronometry: Kuhn Selectable Break Ckt (M21)

    Paul. In answer to your question how were they boxed I found this from Whitney: "Although some break circuit chronometers are mounted in the conventional mahogany carrying case with longer lead wires to permit the chronometer to swing free,generally,most of them are fitted in a padded leather...
  18. burt

    Chronometry: Kuhn Selectable Break Ckt (M21)

    Tom,Dewey,Paul et al. I'm trying to put into perspective just what we have found and what we need to explore. As to the Hamilton break circuit chronometer Whitney identifies only two models. A single break of which they made 201 units starting in 1945 and a selective (multiple) which they made...
  19. burt

    Chronometry: Kuhn Selectable Break Ckt (M21)

    Paul, I wonder if they were boxed like the chronometers used in aviation? Not in gimbals but secured in the box with an outer "shock" ring to protect the instrument. Tom, I think your (son in laws) chronometer a most interesting and desirable/collectible instrument to own as it was used at...
  20. burt

    Chronometry: Kuhn Selectable Break Ckt (M21)

    Dewey, Thanks for taking time to do the picture! I see it's Sidereal so it probably had a career in Astronomy?I know your busy so I looked into how these BC chronometers might be used in Seismology? What I found was Seismology is the study of earthquakes and seismic waves that travel through...
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