British Army uniform and equipment in World War I It contained an inner can of explosive with an outer can of metal fragments or ball bearings. The fuses that were developed for the Jam Tin Grenade were activated by friction or a by lighted taper which was often replaced by a lighted cigarette. This was followed by the highly successful Mills bomb in 1915. It was oval in shape to fit into a clenched fist and time fused. The detonator was activated by a spring driven firing pin which was restrained by a lever that in turn was locked by a safety pin. The Mills bomb was a defensive
Science and invention in Birmingham folding carton and is founder of Boxfoldia. However, an American process is developed by accident prior to this. 1921: A British patent for windscreen wipers is registered by Mills Munitions. Several other patents take place for windscreen wipers around the world. 1922: Birmingham rubber manufacturer Dunlop invents a tyre with steel rods and a canvas casing that lasts three times longer than any other tyre, this is a milestone in tyre manufacture. The following year their tyres help Henry Segrave win a Grand Prix title in a Sunbeam racing car, and are then used on a Bentley to help win