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| BRITISH EXPLOSIVE ORDNANCE |
| Part 2 - Chapter 4 |
| Detonators |
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Anvil-Type Detonators |
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Anvil-type detonators are used with pistols having blunt strikers. There are two clas-ses of anvil type detonators; those which employ a Cartridge Base No. 28, complete with percussion cap and anvil for their initiation, and those in which a percussion cap is hou-sed over an anvil in a recessed plug, which screws into the head of the detonator. These two classes are called the "cartridge-base" and "anvil-plug" classes, respectively. The cartridge-base class was used in bombs which are now obsolete, whereas the anvil-plug class is currently used in service bombs which employ the anvil-type detonator. |
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The cartridge-base class of anvil-type detonators is identifiable by a code of colors, associated with their delays. The code color is painted on the detonator head, and a corresponding colored washer label is affixed to the head. The code of colors is as fol-lows: |
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Delay |
Color |
| Less than 1 second | White |
| 1 sec. and less than 2.5 sec. | Yellow |
| 2.5 sec. and less than 11.5 sec. | Green |
| 11.5 sec to 15 sec. | Blue |
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The anvil-plug class of anvi-type detonators is also identifiable by a code of colors applied as a band, 3/8 in. wide, painted around the detonator head, and a correspond-ingly colored washer label, affixed to the plug, bearing the following particulars: type and mark number, date of filling, filling contractor's initials or recognized trade mark, lot num-ber, and delay. The color code indicating delay is as follows: |
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Delay |
Color |
| Instantaneous | White |
| 0.025 seconds | Black |
| 0.12 seconds | Brown |
| 1.0 seconds | Yellow |
| 11 seconds | Blue |
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Figure 178 - Examples of the Cartridge-Base Class of Anvil-Type Detonators |
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Figure 179 – Examples of the Anvil-Plug Class of Anvil-Type Detonators |
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