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II O R O L O G V. 



Chimes 



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with the letters or notes they were to represent in the 

 gamut or scale of music ; and, according to the number 

 of bars in the tune, as many spaces we're made by lines 

 drawn equidistant and parallel to each othi-r, intersecting 

 the others at right angles. The junction of the ends 

 of the paper, when applied round the barrel, repre- 

 sented one of these bar lines. The length or breadth of 

 the spaces (which might be either squares or parallelo- 

 grams) contained between the bar and note lines, was 

 again divided on the note lines into as many parts or 

 spaces as the number of crotchets in a bar, and for notes 

 of lesser value a less space was taken. While the pa- 

 per was lying on a table, the notes in the tune pro- 

 posed to be laid on the barrel were marked by a black 

 ink dot on their respective lines, and in the same order as 

 the bars of the music lay. After this was done, the 

 paper was pasted on the barrel ; the note lines now 

 appeared like so many circles traced round the circum- 

 ference of the barrel, while the bar lines lay longitu- 

 dinally on the surface of it. By this means the black 

 ink dots were transferred and marked on the barrel by 

 a punch or finger drill. This mode might answer very 

 well where large barrels were used, and only one tune 

 laid on ; but in smaller work, and where several tunes 

 were to be put on the same barrel, it is neither suffi- 

 ciently neat nor accurate. 



We are not acquainted with the method adopted by 

 those workmen in London who practise the pricking 

 inferring o f music on clock barrels ; but having had occasion to 

 nmtfc 'clock construct some musical clocks above thirty years ago, 

 barrels. ancl having no opportunity of getting the music pricked 

 on the barrels by any professional person, it became 

 necessary to contrive some method for this purpose. 

 One way consisted in applying the barrel concen- 

 tric with the arbor of a wheel cutting engine, whose 

 dividing part consisted of an endless screw and wheel; 

 and having fixed other apparatus on the engine for 

 this purpose, different numbers of turns of the endless 

 screw were taken for the longer or shorter notes, and 

 the tunes were as accurately put on the barrel as 

 could be wished. Another way consisted in placing 

 the barrel and its train of wheel work and regulating 

 fly in the frame. A force was applied to turn the 

 barrel, wheel work, and fly round in the order of lift- 

 ing the music hammer tails, and an apparatus was 

 used to mark the dots on the barrel. The fly made 360 

 revolutions for one turn of the barrel ; or should this 

 he thought too quick a train, it might be made by al- 

 tering the numbers of the wheel teeth to make 250 or 

 2GO revolutions for one turn of the barrel; the train or 

 revolutions of the fly being fixed, was made use of in 

 the same way as the endless screw in the former way, 

 by taking a greater or a smaller number of turns of the 

 fly for the longer and the shorter notes. Knowing the 

 number of bars in the tune, and the crotchets in a bar, 

 by calculation, the number of turns of the fly was ob- 

 tained (and partsof a turn if necessary) that a crotchet re- 

 quired, so that the tune might go round the barrel, leav- 

 ing a small space for locking and running ; this was all 

 that was required to be known: quavers and semiquavers 

 came to have their proportion according to the value of 

 the crotchet. Although the process of putting tunes on 

 barrels answered very well by both these methods, yet 

 it was rather tedious, and attended with some trouble 

 and embarrassment in the operation ; and a more simple 

 and easier method of doing this was afterwards con- 

 trived and adopted, by which we could lay on a tune 

 with the greatest accuracy and expedition in nearly ten 

 minute*. 



Although bell music is not of a favourite kind, 

 yet, for the benefit of such clockmakers as may be 

 disposed to construct music clocks, and have not 

 the opportunity of getting the music pricked on the 

 barrel by those whose profession it is to do this 

 sort of work, we shall give a description of the tool 

 and its apparatus, which will be found very v/cll 

 adapted for this purpose, and also of the manner of 

 using it. 



Having a good strong turn-bench, such as those 

 used by clock-makers for their larger sort of work, to 

 the standards or heads of it let there be attached sup- 

 ports on each side ; to the supports on the side nearest 

 the workman, let there be fixed a straight cylindri- 

 cal rod AB, about ten or twelve inches long, and in 

 diameter a quarter of an inch, or even three-tenths 

 of an inch. A spring socket CD must be made 

 for this rod to slide easily and steadily along it, 

 somewhat like the socket which slides on the up. 

 right stalk or rod of a watch-maker's glass stand. In 

 the thick and strong part of this socket E is fixed a 

 steel arm EFG, bent into a curve, which lies over and 

 above the music barrel when in the turn-bench, as 

 shewn in Fig. 2. at EFG. The steel rod AB may at P'-\TE 

 pleasure be placed at any distance from the barrel, CCCVi 

 about an inch or rather more, and should stand paral- lg< ** 

 lei to the barrel arbor MN, and nearly in the same 

 plane with it, but rather a little above this than other- 

 wise. On the outer end of the curved arm is fixed a 

 flat piece of steel G, a little more than half an inch long, 

 in breadth not quite so much, and about one-tenth 

 of an inch thick. The lower and front edges of this flat 

 piece of steel should be neatly and smoothly rounded 

 off, so as to allow it to come easily and freely into the 

 notches a, b, c, &c. which are on the edge of a thin brass 

 scale, whose use will come afterwards to be explained. 

 To the supports attached to the turn-bench heads, and 

 on the opposite side to that where the round steel rod 

 is placed, let there be fixed a slip of brass XY, about 

 ten or twelve inches long, an inch and a half broad, and 

 nearly a tenth of an inch thick, the inner edge of which 

 must be made to stand parallel with the barrel, and the 

 flat side to stand nearly in a plane between the up- 

 per surface of the barrel and its centre, the edge be- 

 ing placed so as to stand clear of the tops of the teeth 

 of a high numbered wheel WW screwed on to the 

 end of the barrel. Near the ends of this slip of brass 

 slits are made, through which screws s, s, pass that 

 screw it to the upper side of the supports; the slits ser- 

 ving to allow it to be moved a little occasionally length- 

 wise when required. On the upper side of the slip of 

 brass is fixed another, but not quite so thick, the length 

 being about that of the barrel, and breadth one inch and 

 three quarters. On the inner edge of this are made as 

 many notches a, b, c, &c. as there are hammers, bells, or 

 notes to be used in the tune or tunes to be marked on 

 the barrel. These notches are equidistant, and the 

 middle of them should correspond to the middle or 

 line of the hammer tails ; their width being such as to 

 admit the flat steel piece G on the end of the curved arm 

 EFG ; the depth of them cut on the edge of the brass 

 should be about one quarter of an inch. The edge of this 

 piece of brass, or music scale as it may be called, must 

 also stand parallel with the barrel, and at a little dis- 

 tance from it, not nearer than three-tenths of an inch, 

 so that the flat steel piece on the end of the curved arm 

 may have room to get in a little way, and to pass 

 through at the same time to a certain degree of depth. 

 On the upper side of this brass slip the letters of the 





