Vehicular road block

A road block for preventing unauthorized vehicles from entering a secured area comprises a pit, a span covering the pit, collapsible support members supporting the span at the trailing end of the plate with respect to the direction of vehicle access, devices for collapsing the support members, and a...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	ROWLAND, W. ROSS
Format:	Patent
Sprache:	eng
Schlagworte:	ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTIONOF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, ORTHE LIKE ARMOUR ARMOURED OR ARMED VEHICLES ARMOURED TURRETS BLASTING CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES FIXED CONSTRUCTIONS HEATING LIGHTING MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL MECHANICAL ENGINEERING WEAPONS
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