SHORT NOTES ON PROFESSIONAL SUBJECTS. 
] 65 
102. Description of a Dummy Time Fuze. 
(Communicated by Captain H. D. Evans, R.A.) 
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Service fuzes being too expensive to use at drill, and it being, 
however, essential to bore, fix, and uncap a fuze for every round, 
the following description of dummy fuze is suggested, having 
been used with great advantage by the writer:—■ 
1. The fuze to be made of beech wood, and similar in shape 
to the service fuze, but a little longer and larger in diameter, 
in order that when fixed it should only go a short way into the 
shell. It could then be easily withdrawn from the shell, and 
if necessary the boring also could be examined by the instructor 
before it was handed to the No. 3. 
2. The centre to be hollowed out from the bottom to within 
an inch of the top, and to be filled with sand or sawdust; the 
bottom to be covered over with paper only, so that the tilling 
may be renewed; and on the top of fuze the false head of a screw 
should be cut. 
3. A groove *5 in. wide to be cut round the neck of fuze, 
and filled up with black Berlin wool, to represent the quick- 
match of the service fuze; the top edge of gioove to be 25 in. 
from the top of the fuze. 
4. *25 in. from the lower edge of the quickmatch-groove must be cut grooves 
•25 in. wide for the holes. They must reach down to the bottom of fuze, and be 
just deep enough to prevent the paper over them being torn when the fuze is 
fixed in the shell. In these grooves the holes must be bored; the top one of the 
even numbers *25 in. from top of grooves, and the remainder '25 in. apart. The 
holes must be made fully the size of the bit of service borer, so that when the 
latter is used at drill, the wood between the holes may not be damaged, and might 
be filled with putty, so as to offer some resistance to it. 
5. The figures on the dummy fuze must be sunk a little, or perhaps only stamped 
deeper than on the service fuze, otherwise after a few days’ drill they would be 
obliterated. The figures must naturally be opposite to the holes. 
6. Over the holes a strip of black, red, or grey paper, with the dots at proper 
intervals corresponding to the holes, should be pasted. 
7. Slips of paper 3 ins. long and '25 in. wide, with dots *25 in. apart (the top dot 
of even numbers ‘25 in. from end of strip, and the top dot of odd numbers 375 in.) 
should be provided, so that a fresh strip of paper can be pasted over the holes at 
the end of each day’s drill. 
8. The exact method of uncapping cannot be shown; for if the whole of the 
black wool (quickmatch) were exposed, it could only be done once at each day’s 
drill. The following plan might, however, be adopted :—Six vertical strips ol 
black or red paper (5 secs, or 9 secs, fuze) about half an inch wide and a irifle more 
than an inch in length, with a piece of white tape under each strip, might be pasted 
over the black wool. By this means the piocess of uncapping might be done at 
any rate six times for each fuze, and these strips replaced for the next drill. 
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