| 摘要 |
A carabiner comprises a surround 2 and a gate 3, with a sensor arrangement for detecting the presence of an object 16 within the carabiner surround 2 and an indicator device 14 for indicating that there is no detected object. The sensor arrangement may comprise an electrical circuit through the surround, such as a pair of conductors (figure 2, 9), where an object 16 inserted into the carabiner completes the circuit. Alternatively, the sensor arrangement may comprise a radiation source and detector, a switch arrangement, pressure sensors 11 or magnetic or electric field detectors. Further, the sensor arrangement may detect a number of objects. The indicator device may be an audible signal, such as an alarm, a visual signal, such as a light, or a vibration. A memory and location tracking device for recording GPS data may also be provided. |
