Anti drilling plate for walls of safe - has layer of rotable balls for absorbing energy of rotating drilling tool

The hole-drilling prevention plate element is especially used for protecting safes against breaking in. The protecting system resists drilling with high quality tools by using relatively cheap materials in the safe wall. Safe walls are made of plates which have under their outside skin a layer of ch...

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Bibliographische Detailangaben
1. Verfasser:	DANZER,JOSEF-HELMUT
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	ARMOUR ARMOURED OR ARMED VEHICLES ARMOURED TURRETS BANK PROTECTION DEVICES BLASTING FIXED CONSTRUCTIONS HEATING KEYS LIGHTING LOCKS MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL MECHANICAL ENGINEERING SAFES SAFES OR STRONG-ROOMS FOR VALUABLES SAFETY TRANSACTION PARTITIONS WEAPONS WINDOW OR DOOR FITTINGS
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Beschreibung
Zusammenfassung:	The hole-drilling prevention plate element is especially used for protecting safes against breaking in. The protecting system resists drilling with high quality tools by using relatively cheap materials in the safe wall. Safe walls are made of plates which have under their outside skin a layer of cheap steel alloy balls arranged so that these balls are able to rotate. These balls are embedded into plastics, pref. into a thermosetting plastics. In another version the balls are held in a plate with blind holes whose dia. is slightly larger than that of the balls. The blind holes are covered with a plate with blind holes. On drilling the tool meets the balls and these balls begin to rotate which absorbs the kinetic energy of the rotating tool so that the layers below are protected.