[Bell Historians] restoration or improvement, was Bishopesgate

[RJ Johnston, Geographical Sciences]

Thanks

--On 31 October 2008 10:47 +0000 Andrew Higson 
<andrew.higson at 7ac45xixn_gobwxiklfm02lJgTOmveLrNFpz4YNdoY1fwyg31Migx4aJaIEiRBQMMWrLTgyt_8YzDJeKD7y1jy-l4P2T448.yahoo.invalid> wrote:

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> Not quite right, Alan.
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> Warners removed the canons at the previous re-hang in the early 20th
> century -- somewhat brutally it has to be said. The head of the treble
> was so thin that we had it welded up for some peace of mind.
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> Andrew Higson
>
> Taylors Eayre and Smith Ltd
>
> The Bellfoundry
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> Freehold Street
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> Loughborough
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> LE11 1AR
>
> Telephone: 01509 212241 Fax: 01509 263305 Registered in England No.
> 1352309
>
>
> __________________________________________________
>
> From: bellhistorians at yahoogroups.com
> [mailto:bellhistorians at yahoogroups.com] On Behalf Of Alan Taylor
> Sent: 31 October 2008 10:38
> To: bellhistorians at yahoogroups.com
> Cc: J.Adams at Rey_To756tT382xelyXIns1d2_cr32BfkQNOy6Egq55gLATmTJ_NDcEAV21aPhjsRXvXwlBppFwKo_mP.yahoo.invalid
> Subject: RE: [Bell Historians] restoration or improvement, was
> Bishopesgate
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> The cannons were removed when the bells were re-hung in the 1990s.
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> As for the rest, a faculty will have to be sort and no doubt all will be
> discussed within that process.
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> Alan
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> __________________________________________________
>
> From: bellhistorians at yahoogroups.com
> [mailto:bellhistorians at yahoogroups.com] On Behalf Of Bickerton, Roderic
> (SELEX GALILEO, UK)
> Sent: 31 October 2008 10:25
> To: bellhistorians at yahoogroups.com
> Subject: RE: [Bell Historians] restoration or improvement, was
> Bishopesgate
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> If it is to be welded, there is still an issue as to what is repair and
> what needs conserving.
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> Should sound bow wear be filled?
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> If so there will be some change of tone and pitch.
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> Should mining damage associated with crown staple removal be filled and
> the crown accurately re drilled?
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> I believe technically it is possible to replace the cannons, if it is
> possible to obtain the information necessary to make a decent replica.
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> Its been noted the casting has some flaws, should areas of holes or
> porosity be cut out and built back?
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> Should it be slightly re tuned?
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> Its a bell  presumably has a full tonal analysis, as it has an exact
> frequency quoted.
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> I would guess a tuning expert would be able to say where a few extra mm
> of metal could be added during the welding to make tuning give a much
> better outcome.
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> It could well be that the area where more metal would be desirable is
> where previous tuning attempts have been made, making addition a
> restoration rather than an improvement. 'Would it matter if the tuning
> had been attempted by the founder or many years later?
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> SELEX Sensors and Airborne Systems Limited
>  Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex
> SS14 3EL
>  A company registered in England Wales. Company no. 02426132
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----------------------
Prof Ron Johnston FBA
School of Geographical Sciences
University of Bristol
Bristol BS8 1SS, UK
+44 (0)117 928 9116
R.Johnston at 5wk9h3G_mLLWLlO0A-eRYkp5krlOYk3evcQQzNdZkdLOAf0TxP-jYzw6AfZ8AMqPdAD63BjMZLcGdHpjd9js6RY.yahoo.invalid
http://www.ggy.bris.ac.uk/staff/staff_johnston.html