Abstract: A protective rod for landscape is comprised of a bent piece consisting of a horizontal, above ground member defining a given length, and a pair of anchor members extending perpendicularly from each opposite ends of the horizontal member so as to define a given height.

Abstract: A safe and arm system includes an operator control subsystem including a first arm switch, a second arm switch, and a fire switch. A fire control subsystem is responsive to the operator control subsystem and includes at least a pair of terminals for connection to a munition. The terminals are initially shorted together and without a ground. A power supply control circuit is configured to supply power to the terminals. A ground supply circuit is configured to ground one said terminal. A terminal shorting circuit is configured to remove the short across the pair of terminals. The power supply control circuit, the ground supply circuit, and the terminal shorting circuit are configured to ground one terminal, remove the short across the pair of terminals, and to supply power to the terminals only if the first and second arm switches and the fire switch are all activated in a predetermined sequence.

Abstract: A safe and arm system includes an operator subsystem including a first arm switch, a second arm switch, and a fire switch. A fire control subsystem is responsive to the control subsystem and includes at least a pair of terminals for connection to a munition. The terminals are initially shorted together and without a ground. A power supply control circuit is configured to supply power to the terminals. A ground supply circuit is configured to ground one said terminal. A terminal shorting circuit is configured to remove the short across the pair of terminals. The power supply control circuit, the ground supply circuit, and the terminal shorting circuit are configured to ground one terminal, remove the short across the pair of terminals, and to supply power to the terminals only if the first and second arm switches and the fire switch are all activated in a predetermined sequence.

Abstract: Disclosed is a chimney access structure which is particularly well adapted for use in grounds subject to freezing. This structure incorporates chimney provided with an upper end on which is mounted an adaptor provided with a vertical through-hole and with a countersink hole of greater diameter that the through-hole. The countersink hole is preferably frusto-conical and extends coaxially within the through-hole at a given depth from the upper face of the adaptor. This countersink hole defines a sleeve with upper portion of the adaptor which is provided with an inwardly projecting flexible sealing ring. A floating head is slidably mounted into the sleeve. This head has a vertical through-hole coaxial with the one of the adaptor. The floating head also has a lower portion provided with an outer lateral surface whose shape and size are selected to fit into the countersink hole of the adaptor and sealingly slide within the same thanks to the sealing ring.