| 摘要 |
A device for stunning fish comprising: an elongate member comprising an open channel through which a fish can pass; a pneumatically operated gun pivotally mounted in said channel, said gun comprising an impact cylinder and piston, wherein said piston is connected to a cylinder striker which is retractably extendable from a sleeve on said cylinder, and wherein said gun can pivot between a lowered firing position where said striker can stun said fish at a set point in a channel and a raised position where said fish can pass beneath said gun; a vertical guide plate pivotally mounted on the internal surface of each wall of said channel and having extended (outward) and retaracted (inward) positions, wherein the end of a guide plate distal the pivotal mounting is at or near said set point and the pivotal mounting is between said set point and the channel entry; a mechanism for pivoting said gun between said lowed and raised positions; a mechanism for pivoting each said guide plate between said extended and retracted positions; a trigger for firing said gun when said lowered position and activating said pivot mechanism to pivot said gun to said raised position, and activating said guide plate pivot mechanism to pivot said plates to said retracted position; and a sensor for detecting passage of said fish out of said channel and activating said pivot mechanism to return said gun to said lowered position, and activating said guide plate pivot mechanism to pivot said plates to said extended position. |
