Abstract: A portable collapsible shelter having particular use as a hunting blind. The shelter includes a plurality of generally C-shaped frame members and the upper ends of the frame members are connected to an upper connecting plate, while the lower portions of the frame members are connected to a lower connecting plate. A flexible cover is attached to the frame members and provides an enclosure. The frame members can be pivoted between a folded condition, where the frame members are in generally parallel relation, to an extended condition where the frame members extend radially from the connecting plates. The cover is provided with an access slit which extends the full height of the cover and can be closed through a fastener such as a zipper. An auxiliary panel can be connected to the side portion of the cover on either side of the slit. The panel extends outwardly from the cover and can be held in an outwardly bowed position by a ground stake.

Abstract: A semi-automatic pistol has a slide which houses a barrel and a firing pin, and a frame which houses a trigger and a mechanism for releasing the firing pin. The mechanism includes a sear engageable with the firing pin and a cam actuator which is operable by the trigger. The cam actuator prevents movement of the sear to release the firing pin and also operates a detent to prevent movement of the firing pin, until the trigger has moved the cam actuator by a predetermined amount. The firing pin can also be locked in position by a safety catch which can act at the same time on a linkage between the trigger and the cam actuator, to disconnect the latter from the trigger. The operating characteristics of the trigger may be determined by selection of an actuator having a required profile. The firing pin is held captive in the slide and cannot be tampered with.