The conflicting technical requirements result that safes with a high degree of fire-resistance have low degree of burglar-resistance and are easily attacked by thieves, while safes with a high degree of burglar-resistance feature poor fire-resistance and are often damaged by fires. Safes combining high degrees of fire-resistance and burglar-resistance are not able to achieve a maximum protection level in both aspects simultaneously, because the requirements come into conflict and compromises have to be made
The invention resolves these conflicts, allowing a high degree of fire- and burglar-resistance by making the fire-protection elements contribute to the burglar-protection and vice versa. The fire- and burglar-protection is designed with deep, progressively spaced modules, achieving a cumulative effect and providing the necessary security from all sides. The number of modules can be changed according to the required security level.
The physical characteristics of the shown example with 2 modules (chambers):
Heat entering the inner space should make its way through 5 mirror surfaces, reflecting about 80% back, 6 layers with thermal conductivity 70 times less than steel, 1 volume with thermal conductivity 48 times less than steel, 1 hermetic void with thermal conductivity 2300 times less than steel and three steel layers. A burglary, accordingly, should break through 6 layers obtained through thermochemical processing of very high hardness steel of about 64 HRC and would be additionally hampered by 6 mineral layers and a volume of fire-resistant concrete.
There is also a possibility for mechanical drilling detection and security alarm triggering. The same modular design principle is also applicable for armor plating and fire-resistant door lining. When the outer surface is fitted with ceramic tiles for armor plating of tanks and planes, maximum resistance to fire and burglary is achieved, as safes are capable to withstand a direct hit of a 12.7 mm bullet, making them practically invulnerable to existing instruments. The safe door behind the ceramic tiles would stay cool even at very high external temperatures, which ensures the security of the contents of the safe. With a certain number of modules it is assumed that the inside temperature would remain constant and the safe would be capable to withstand intense heat for indefinite period of time and not only for 60 to 120 minutes, as currently existing.