[Bell Historians] A Short handstroke
aaspland at iHbU4kxgAL7fCX3HhaTedBTiOIFYvMtIs8p0P4fzmSEz29HQBhCzm1ac3-zkY-c2J6osJ0ryTWWdRlw.yahoo.invalid
Wed May 11 08:45:21 BST 2011
For a practical solution on a bell already up and running (i.e. not possible in the bell hanger’s workshop):
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.
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.
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.
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!
From: matthewhigby at qZy1MscEjQktx6luE_nHX0Iaa5PAiaC55i8Vr0CIepLZVL6BY0JheYVnCqzM-tXMxNaHFA85b49_mWwC.yahoo.invalid
Sent: Friday, May 06, 2011 1:50 PM
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Subject: Re: [Bell Historians] A Short handstroke
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
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Date: Fri, 6 May 2011 13:25:31 +0100 (BST)
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Subject: [Bell Historians] A Short handstroke
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 ).
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 .
Am I correct please and if so what is accepted to be the correct angle ?
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