| 摘要 |
The alarm system is for protecting an area at least partially enclosed by flexible closure means 10 such as the load platform of a 'curtainsider' type vehicle and includes sensor means associated with the closure means which are responsive to at least one of the following conditions: disturbance of the closure means; or separation of the closure means from an adjacent member. The sensor means comprises a network 16 of conductors 18 included with the closure means, together with conductors (not shown) which connect an edge portion of the closure means to the adjacent member. The conductors included with the closure means are connected into one or more circuits which are connected into suitable alarm circuitry by an extendable conductor 22. The alarm is preferably operable in response to breaking a conductor upon attempting to cut or lift the closure means, but it may be responsive to vibration or the making of a circuit. <IMAGE> |
