The No 7 Mk 1 Dingbat mine is a British anti-personnel blast mine. The mine has a steel body, with a flexible pressure pad on the top surface. Under the pressure pad is a

belleville spring A Belleville washer, also known as a coned-disc spring, conical spring washer, disc spring, Belleville spring or cupped spring washer, is a conical shell which can be loaded along its axis either statically or dynamically. A Belleville washer is ...

with a central striker. The fuse is slid into the side of the mine, a firing pin prevents the fuse being fully inserted until it is removed. The mine was intended to be scattered mechanically, and a number of systems were tested to scatter it. However, none were accepted into service, so the Dingbat mine was hand laid instead. The mine came with a small fabric cover to help hide it. The United Kingdom destroyed the majority of its inventory of anti-personnel mines under the terms of the Anti-Personnel Mine Ban Convention. In a report to the Convention in April 2015 it declared that it retains 724 foreign manufactured anti-personnel mines solely for training and development of mine detection and clearance techniques as permitted by the treaty.

Specifications

* Diameter: 57 mm * Height: 32 mm * Weight: 113 g * Explosive content: 56.7 g of

Tetryl 2,4,6-Trinitrophenylmethylnitramine commonly referred to as tetryl ( C7 H5 N5 O8) is an explosive compound used to make detonators and explosive booster charges. Tetryl is a nitramine booster explosive, though its use has been largely superseded ...

* Operating pressure: 11 kg to 15 kg

References

* ''Brassey's Essential Guide To Anti-Personnel Landmines'', Eddie Banks * ''Jane's Mines and Mine Clearance 2006-2006'' Anti-personnel mines Land mines of the United Kingdom {{Landmine-stub