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<DIV dir=ltr align=left><SPAN class=322470615-30102007>Could there be ignorance
of engineering principles?</SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=322470615-30102007>The chime speed will be
variable for a number of reasons, but not the height of the
weights.</SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=322470615-30102007>the speed governor is
usually an air fan.</SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=322470615-30102007>its resistance is
effected by air density and simple facts like whether weather the clock case is
open or closed.</SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=322470615-30102007>Generally the fan blades
are made adjustable so the chime speed can be adjusted.</SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=322470615-30102007>The form of adjustment
usually is a friction fit of the blades on the arms, allowing them to be
turned to change the air resistance.</SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=322470615-30102007>They can easily be
changed during routine inspection if accidentally knocked and I suspect
change with time, due to the stress and vibration generated during
use.</SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=322470615-30102007>I rather like the idea of
a variable time standard as it introduces an element of luck into who actually
beats the clock.</SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=322470615-30102007></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=322470615-30102007></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=322470615-30102007></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=322470615-30102007></SPAN> </DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
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<FONT face=Tahoma size=2><B>From:</B> bellhistorians@yahoogroups.com
[mailto:bellhistorians@yahoogroups.com] <B>On Behalf Of </B>Mike
Chester<BR><B>Sent:</B> 30 October 2007 15:03<BR><B>To:</B>
bellhistorians@yahoogroups.com<BR><B>Subject:</B> Re: [Bell Historians] French
clocks.<BR></FONT><BR></DIV>
<DIV></DIV>
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<P>--- In <A
href="mailto:bellhistorians%40yahoogroups.com">bellhistorians@<WBR>yahoogroups.<WBR>com</A>,
"Bickerton, Roderic K (SELEX) <BR>(UK)" <roderic.bickerton@<WBR>...>
wrote:<BR>> It is a weight driven clock so what connection between the height
of <BR>the weights and the speed? Might I suggest it could even be faster low
<BR>down because of the contribution from the weight of the extra deployed
<BR>winding cable.<BR>> <BR><BR>Only repeating what is on the website <BR><A
href="http://www.trin.cam.ac.uk/index.php?pageid=378">http://www.trin.<WBR>cam.ac.uk/<WBR>index.php?<WBR>pageid=378</A><BR><BR>Surely
Cambridge people would not tell porkies. JEC might have <BR>something to say on
that!<BR><BR>Mike<BR><BR></P></DIV><!--End group email --></BODY></HTML>
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