[Bell Historians] Bishopsgate

Bickerton, Roderic (SELEX GALILEO, UK) Roderic.Bickerton at 8AWh6ha-Z21mp5pkDYm3raDE9QlmZ2Lu443hqe9LS40fsBULEasnVB87qM-yNDlXn-7WMvE7VRu19IBZbBm-wkjs0TxIP4KBtIli.yahoo.invalid
Fri Oct 31 08:53:01 GMT 2008

Has anyone assessed it, or is anyone going to?
 Its always interesting to know the cause of  a crack?
Perhaps the origin of the crack will be apparent when it is opened prior
to welding.
Spotting origin is not necessarily going to show the cause.
All castings have small flaws and any crack will start at a point of
the cause could be the flaw, or the metallurgy, or excess loading.
excess loading is difficult. A warn and well bedded clapper may be o/k
but move it slightly, say for example to correct an odd struck bell, can
result in the impact point moving to the edge of the kiss mark, locally
raising stress considerably until it beds back in.
I believe, for example the failure of the old tenor at Watton at Stone
occurred because the leather wore away, allowing the clapper to strike
to far out on the sound bow, impacting the outer edge of deep and badly
warn kiss mark.
I repaired the leather twice on that bell and left  warnings about
keeping an eye on it the crown staple loop was badly warn on the inside
and the leather needed extra packing to hold it up in the correct
the large flat on the inside of the loop wore the leather badly so it
needed regular attention.


From: bellhistorians at yahoogroups.com
[mailto:bellhistorians at yahoogroups.com] On Behalf Of Alan Taylor
Sent: 30 October 2008 20:41
To: bellhistorians at yahoogroups.com
Subject: RE: [Bell Historians] Bishopsgate

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It is to be welded. There is a 9" crack in the soundbow.



From: bellhistorians at yahoogroups.com
[mailto:bellhistorians at yahoogroups.com] On Behalf Of jimhedgcock
Sent: 30 October 2008 19:18
To: bellhistorians at yahoogroups.com
Subject: [Bell Historians] Bishopsgate

Is there any further news about the tenor?
I assume that because of the rarity of the ring, welding rather than 
recasting would be the preferred option?


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