Abstract: A bowling ball stop assembly for a pinsetter of a bowling lane is provided. The bowling ball stop assembly can include a moveable blocking feature that moves between a plurality of positions. The plurality of positions include an extended position with the stop arranged in front of the pinsetter to block or obstruct bowling balls moving down the bowling lane, and a retracted position with the stop raised away from the bowling lane to allow passage of bowling balls and the play of bowling games thereon. The bowling ball stop assembly further includes a frame supporting the blocking feature and configured to guide or facilitate control of movement thereof between the extended and retracted positions. Other aspects also are described.

Abstract: The firearm with pressure accumulator (5) having increased battering charge (3) and barrel (1) length has a piston (43) sliding in the accumulator housing (41) fixed to the breech (6) and springs (38, 38, 40) supporting the piston. To create a pneumatic spring (17) an annular brake chamber (44) is provided. The battering charge is arranged in the bolt body (31) located in the breech and has a neck (7) with an opening (9) facing towards the barrel to direct propellant gas to the barrel. This structure can be adapted to any size of the firearms, e.g. sharpshooter rifles with range of 4 to 6 kilometres, sky sweepers with an amplitude of 30 to 35 kilometres to combat targets by homing missiles as well as intercontinental missiles with a range of 500 to 1000 kilometres.