Bigelow, Kennard & Co.

pmwas

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For the escapement change, made on several models, Waltham printed the following illustration and explanation in several versions of their material catalog, and the revised parts have different part numbers. One can see the shape of the pallet fork in most images. The earlier forks have noticeably square profiles around the pallet stones. This change in escapement is why one has to be careful to get the proper part when replacing escape wheels or pallet forks on these models -- you can't just swap parts between 1894 models (or 1892 models) without paying attention to this or you will have a mis-matched escapement.
Changes and improvements... it's always so disappointing when you find a part and it turns out wrong. And sometimes you just don't know what's exactly wrong - looks all right, but just won't work properly ;)
 

Jerry Treiman

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Back in post # 17 (Feb.2015) I apparently showed a photo of four different size Walthams for Bigelow, Kennard & Co. (out of five different sizes that I know of). Unfortunately all of my attachments prior to this year seem to have disappeared from this thread when we migrated to the new board. Here again is the photo comparing four different size Walthams for BK&Co. (12-size, 0-size, 6/0 and 10-ligne). I do not have the Colonial Series watch in the array, but it is only slightly larger than the 12-size.

It would seem that BK&Co. never ordered any 16-size movements from Waltham, or at least I have never seen one. Has anyone else seen a 16-size Waltham for this jeweler?

4_BK.jpg
 
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Tom McIntyre

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Jerry,

I tried to restore the missing images. I can do that for most posts that have lost them, if folks will notify me they are missing.
 

Tom McIntyre

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Nice Dave. It is interesting that the 7 million one does not show the jewel count (unless I have finally gone blind.)
 

Jerry Treiman

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On that model they did not start marking the jewel count until they added two more jewels to make it 19 jewels. Initially those two extra jewels were capping the escape wheel but later they switched to the jeweled mainwheel. (I think the cap jewels are more beneficial).

By the way Dave - do those have Bigelow, Kennard & Co. dials? ... or did you mean to post those pictures to the thread on the 12-size Riverside models?
 

johnbscott

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I think that a jewelled barrel is beneficial for isochronism by assisting to maintain the balance arc at low mainspring tension.
 
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Tom McIntyre

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On that model they did not start marking the jewel count until they added two more jewels to make it 19 jewels.
The picture of the 7 million is a little fuzzy but I had managed to convince myself that I saw a cap on the escape wheel.

As to isochronism, it applies to force delivered to the balance and the friction on the escape wheel pinions is a much greater influence than on the barrel arbor because it is moving much faster and is in oil. I agree with Jerry that the cap jewels are better features than the jeweled barrel.
 

johnbscott

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An un-jewelled barrel would be subject to elevated static friction, which is higher than dynamic friction (as experienced at the other end of the train). I agree that cap jeweling at the escape wheel would mitigate friction, there (by preventing arbor shoulder contact), but the greatest benefit of the cap jeweling might be to control the engagement between the escape wheel and the pallet stones. If barrel jeweling can serve to maintain balance arc when mainspring tension is low, that would be a significant contribution to isochronism.
 

Dave Chaplain

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By the way Dave - do those have Bigelow, Kennard & Co. dials? ... or did you mean to post those pictures to the thread on the 12-size Riverside models?
None of the three I show have Bigelow dials ... I was responding to the interesting discussion about the 12s model 1894 side by side comparisons made here, and an issue with the pics being available, but if the moderator wants to move or copy my post to a 12s Riverside thread that's ok with me! :)
 

Jerry Treiman

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I haven’t posted to this topic in a while and thought I would post a summary of the variety of custom movements that Waltham produced for Bigelow, Kennard & Co. From 1904 to perhaps as late as 1912 Waltham made private label movements for them in five sizes (10-ligne, 6/0, 0-size, 12-size and Colonial Series) and as many as six grades (13-jewel to 23-jewel). The two attachments show almost all of the different movement styles/grades that I have been able to identify. As far as I know Waltham never made a 16-size movement for BK&Co and I have yet to see one, in any size, cased in a hunting case. BK&Co appears to have cased these movements in-house in gold, silver and gun-metal cases. I would love to be able to add pictures of the 17-jewel 0-size and Colonial Series for BK&Co. if anyone has one.
BK_ladies movements.jpg BK_12-size_movements.jpg
 
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Jerry Treiman

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How great to find one still in its gold case! I have only seen three from this serial number range, each one different -- 15j, 17j & 19j. They seemed to be phasing out the patented click at this time, so it is nice to see that yours has it.

What does the dial look like?
 

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