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<DIV>I suppose one could calculate it from a bell with single pulley – the
pulley mouth is in line vertically with the sole of the wheel and is usually
dropped by about 4” below the horizontal line (though this degree of dropping
may depend on size of bell and bell hangers’ preferences). For a 66”
diameter wheel, by Pythagoras 33^2 + 37^2 = 2458,
2458^0.5=49.6, 49.6-33 = 16.6” So 16.5” is shortest distance from
wheel to pulley mouth. The more a double pulley draws inwards the more it
needs to drop downwards to maintain this distance.</DIV>
<DIV>Yours</DIV>
<DIV>Andrew</DIV>
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<DIV style="font-color: black"><B>From:</B> <A title=peter.trent@btinternet.com
href="mailto:peter.trent@UKQteELjznG7rLIa4awxUtnOKerw-yhS3O4h69AZJmNl41mCxbs5zcipUekByVN6Y5m8eNp2yChYza7sR10Un04tq5B1.yahoo.invalid">Peter Trent</A> </DIV>
<DIV><B>Sent:</B> Wednesday, May 11, 2011 9:09 AM</DIV>
<DIV><B>To:</B> <A title=bellhistorians@yahoogroups.com
href="mailto:bellhistorians@yahoogroups.com">bellhistorians@5BWG5Fe1Q9yudoNbcwuJ1p2OPPJEk_JhAiUpvwGcsdXA-wR4BLKF5EJ-X-SiSMJ5zBwIdR1_J0l4SGr3314325-vQ4w_5g.yahoo.invalidom</A>
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<DIV><B>Subject:</B> Re: [Bell Historians] A Short handstroke</DIV></DIV></DIV>
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<DIV><FONT size=2 face=Arial>Is there a rule of thumb or optimum distance
between pulley mouth and wheel?</FONT></DIV>
<DIV><FONT size=2 face=Arial>PJT</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV style="FONT: 10pt arial; BACKGROUND: #e4e4e4"><B>From:</B> <A
title=aaspland@-OM3qQIIMjc43OuFPJzY8qvExPzALUwF0BPhJkZJypOPQJVVlZR069W5Rw_QKcmRjm_UppfJ_O58cl2_LXPruSfnLaU.yahoo.invalid href="mailto:aaspland@-0ME6hKbRGcQOGWiHsOysdtabFJFj2getVJIty-27g_D9fX1Vy7pAR0KtbbJlVsCYD56Vcq6pu2flA.yahoo.invalid">Andrew
Aspland</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=bellhistorians@yahoogroups.com
href="mailto:bellhistorians@yahoogroups.com">bellhistorians@yahoogroups.com</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, May 11, 2011 8:45
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Bell Historians] A Short
handstroke</DIV>
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<DIV>For a practical solution on a bell already up and running (i.e. not
possible in the bell hanger’s workshop):</DIV>
<DIV>Measure the height of the sally off the ground when the bell is down,
raise the bell and whilst holding it on the balance get an accomplice to
measure the height of the sally again. Calculate the difference between
these two measurements and half it. This is the distance the garter hole
needs to move. If the sally goes up when the bell is raised then the
garter hole needs to go up.</DIV>
<DIV>I believe some bells with double pulleys have been over compensated for –
i.e. the grater hole has been dropped too much when initially installed.</DIV>
<DIV>A less considered problem is the distance of the mouth of the pulley from
the wheel: too close and the rope kicks and jerks as it changes from
backstroke to handstroke, too far away and the whole thing is rather languid
and perhaps there is more danger of the rope slipping wheel.</DIV>
<DIV>Before the augmentation the fifth (?) at Cookham had the pulley brackets
mounted upside down so the pulley was really close to the wheel – very odd
handling!</DIV>
<DIV>Andrew</DIV>
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<DIV><B>From:</B> <A title=matthewhigby@AMcTzz7NWjtvtsUf63f263S3exRCEJlnzsZEzQS3iOZVHD2i0L-nqxL_9FYrlp10Vl0CVnnH1gVkxpsgeb8g2EoZoTfpdQ.yahoo.invalid
href="mailto:matthewhigby@IMcRhNlRCXkzwh_qSsQw_hVKSFuZOtZFZkr6inyeWv-OOShapyC5DnJMZDoc5JyMQ51vgBHuFkiqTByMJh66.yahoo.invalid">matthewhigby@IMcRhNlRCXkzwh_qSsQw_hVKSFuZOtZFZkr6inyeWv-OOShapyC5DnJMZDoc5JyMQ51vgBHuFkiqTByMJh66.yahoo.invalid</A> </DIV>
<DIV><B>Sent:</B> Friday, May 06, 2011 1:50 PM</DIV>
<DIV><B>To:</B> <A title=bellhistorians@yahoogroups.com
href="mailto:bellhistorians@yahoogroups.com">bellhistorians@yahoogroups.com</A>
</DIV>
<DIV><B>Subject:</B> Re: [Bell Historians] A Short
handstroke</DIV></DIV></DIV>
<DIV> </DIV></DIV>
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<DIV id=ygrp-text>
<P>Basically the sally should be the same height when the bell is vertically
up or down. Lay a plumb line over the gudgeon and pulley. Mark where it passes
the wheel shroud. Measure the circumference of the wheel by laying a tape
around the sole of the wheel then divide that by 4. Measure up from your mark
by that amount and that should be your garter hole position (again lay year
tape in the groove of the wheel, around the sole. The garter hole should then
be the same distance from the pulley when the bell is vertically up or down.
The sally being a little higher when set. Hope this helps. Matthew
<P>Sent using BlackBerry® from Orange</P>
<HR>
<DIV><B>From: </B>David Willis <dcwillispiano@YOYSMIMSJRaH1GczAltkMMFfL8NyO5Bp58HPpxXMR6hLk0Cy_7eGrrVwe5D-91LNzGdQpTUvaFk43003eEsV.yahoo.invalid> </DIV>
<DIV><B>Sender: </B>bellhistorians@yahoogroups.com </DIV>
<DIV><B>Date: </B>Fri, 6 May 2011 13:25:31 +0100 (BST)</DIV>
<DIV><B>To: </B>BellHistorians<bellhistorians@yahoogroups.com></DIV>
<DIV><B>ReplyTo: </B>bellhistorians@yahoogroups.com </DIV>
<DIV><B>Subject: </B>[Bell Historians] A Short handstroke</DIV>
<DIV> </DIV><SPAN> </SPAN>
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<TD vAlign=top>A bell in our group is suspected of having a short
handstroke . My thought is that this is something that can be measured
with the bell down ( of course ).<BR><BR>If a line is taken from the
garter hole to the gudgeon and another from the gudgeon to the pulley an
angle is formed between the two . Too little resulting in a short
handstroke . <BR><BR>Am I correct please and if so what is accepted to
be the correct angle ?<BR><BR>David<BR></TD></TR></TBODY></TABLE></P></DIV><!-- end group email --></DIV><!-- end group email --></DIV></DIV></DIV></DIV><!-- end group email --></BLOCKQUOTE></DIV><!-- end group email --></DIV></DIV></DIV></BODY></HTML>