| 摘要 |
<p>The system is designed to obviate the loss of objects. The system consists of two elements A and B designed so that movement of one from the other triggers a warning signal. The signal will only cease when the two parts (A, B) of the system brought closer together or their supply is cut. The element A is a transmitter carried on the object and the element b is a receiver carried on the person responsible for the object. The transmitter and receiver housings incorporate circuits necessary to maintain closure or opening of a contact. The contact is opened or closed according to the distance aprt of the transmitter (A) and receiver (B) without interference of an operator.</p> |
