Armour
Armor comprises one or more ceramic plates differentially reinforced by reinforcement applied to a face of the plate to separate regions of low reinforcement by regions of higher reinforcement.
1. Armour comprising a ceramic plate differentially reinforced by reinforcement applied to a face of the plate to separate two or more regions of low reinforcement by regions of higher reinforcement, in which the regions of higher reinforcement are of a width sufficient to separate the regions of low reinforcement by at least 1 mm and in which one or more of the regions of low reinforcement each has an area more than 100 mm 2 .
2. Armour as claimed in claim 1 , in which the regions of higher reinforcement are regions of the face of the ceramic plate to which fibre reinforcement is adhered.
3. Armour as claimed in claim 2 , in which the regions of low reinforcement are regions of the face of the ceramic plate to which the fibre reinforcement is not adhered.
4. Armour as claimed in claim 2 , in which the fibre reinforcement of the regions of higher reinforcement is applied as crossing strips of fibre reinforcement.
5. Armour as claimed in claim 4 , in which the fibre reinforcement is applied as a grid of crossing strips of fibre reinforcement.
6. Armour as claimed in claim 1 , in which the regions of higher reinforcement are of a width sufficient to separate the regions of low reinforcement by more than 5 mm.
7. Armour as claimed in claim 6 , in which the regions of higher reinforcement are of a width sufficient to separate the regions of low reinforcement by more than 10 mm.
8. Armour as claimed claim 7 , in which the regions of higher reinforcement are of a width sufficient to separate the regions of low reinforcement by more than 20 mm.
9. Armour as claimed in claim 1 , in which the reinforcement comprises fibres in a polymer matrix.
10. Armour as claimed in claim 1 , in which the reinforcement comprises carbon fibres.
11. Armour as claimed in claim 1 , in which the reinforcement comprises a unidirectional assembly of fibres.
12. Armour as claimed in claim 1 , in which the ceramic plate comprises a front face and a rear face, and the differential reinforcement is provided on the front face of the ceramic plate.
13. Armour as claimed in claim 12 , comprising a backing layer applied to the rear face of the ceramic plate.
14. Armour as claimed in claim 1 , in which differential reinforcement is provided on the rear face of the ceramic plate.
15. Armour as claimed in claim 1 , in which fibre reinforcement is be provided on one face of the ceramic plate and wraps round the edge of the ceramic plate to at least in part extend across the other face.
16. Armour comprising more than one ceramic plate, at least one ceramic plate of the armour being differentially reinforced by reinforcement applied to a face of the ceramic plate to separate two or more regions of low reinforcement by regions of higher reinforcement, in which the regions of higher reinforcement are of a width sufficient to separate the regions of low reinforcement by at least 1 mm and in which one or more of the regions of low reinforcement each has an area more than 100 mm 2 .