By Edmund W. Jupp
The purpose of the "Watching" sequence is to attract recognition to a couple of the very fascinating goods round us, issues that maybe we do not detect up to we'd. the 1st was once "Bridge Watching", and whilst this was once placed "on the web" it produced, to the shock of the writer, this kind of friendly flood of e mail that one other was once written, known as "Water Watching". This, too, used to be kindly bought. So it used to be tempting to proceed with the topic. many folks comprehend little or no approximately bells, and a few, unfortunately, comprehend not anything in any respect. this can be a pity for, huge or little, they are often attractive gadgets. chances are you'll imagine that "Bell listening to" may be a greater name; yet bells has its personal charm, too. In England, church bells are renowned, as a result of the sounds they make, although many of us haven't noticeable the bells themselves. Doorbells, too, are everyday goods in lots of homes, yet are infrequently seemed with any specific curiosity. a few of these are usually not what's popularly imagined as bell-shaped, and are extra correctly chimes. Then there are bicycle bells, cowbells, and plenty of different kinds, too, all worth a notion. issues which are unfastened are doubly appealing. It expenditures not anything to benefit from the pleasures of having to understand those fascinating items. studying a bit in regards to the interesting traits of bells generally could be an relaxing career, and will commence a full of life interest approximately them. The extra you recognize approximately them, the extra attention-grabbing they develop into.
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Extra resources for Bell Watching (Watching S.)
When in motion, the forces due to movement, (dynamic loading) are outwards, so that the direction relative to the frame varies as the bell turns. In other words, the direction of the dynamic forces rotates with the bell, whilst the static forces are always downwards. The combination of these two forces acts upon the frame when the bells are being rung. At the top of the swing the dynamic loading falls to zero as the bell comes to rest, then rises to a maximum as it swings down to the lowest point in its travel.
In some cases, the problem of transport can be tricky. A smaller bell can be carried in the back of a van or lorry; but the very large ones require special flat loaders, and in some cases police escort through difficult places. In ancient times the bells were cast close to the tower, and were then swung over to the tower itself with tripods, or sheerlegs, with rope and tackle. For sheer legs, a couple of stout poles sufficed, lashed together at the top, with their bases connected by a rope to stop spreading.
Since tower bells in England are rung in certain patterns, all the bells in one set are required to have the same natural frequency of swing. Accordingly, a ring of bells is arranged to comply with this by suitably designing the headstock. When you look at a bell in a church tower, you will see that the piece of wood is cut away in the centre to accommodate the crown of the bell. By so shaping it, the time of swing is shortened. Usually the time is about two seconds. The headstocks of the different bells are shaped differently, for this reason, and the bell itself is strapped to the headstock with metal bands.