| 摘要 |
A target system having a plurality of flat target boards mounted on posts which are rotatably journaled on an elongated base. Each post is rotatable ninety degrees. A drive crank arm is pivoted to the base for horizontal swinging movement and is pivotally connected to an elongated drive and synchronizing bar which in turn is pivotally connected to a plurality of lever arms connected to the respective posts to swing the target boards simultaneously between full view positions easily visible to a shooter, and edge view positions not visible to the shooter. A superior degree of reliability results from optionally selectible, multiple power drives applied to the single drive crank arm. Optional, ground-supported and overhead-supported embodiments are disclosed. In the embodiments shown, two drives with completely different power sources are shown, one being fluid pressure, the other being electricity. These are in a compact, over-and-under relation. Separate release mechanisms are provided for the two power drives to prevent either drive from restricting movement of the target boards when the other drive is activated. One release mechanism is adjustable to release the electrical power drive when the target boards are swung by the fluid pressure power drive, and another release mechanism is adjustable to release the fluid pressure power drive when the target boards are swung by the electrical power drive.
|
