Abstract: A firefighting installation includes a network of vacuum sprinklers. The installation incorporates a trip device that triggers the application of water to the network of sprinklers. The trip device includes: a master actuator sensitive to the pressure present in the sprinkler network and capable of moving a yoke from a first to a second position; a lock for locking a member of the actuator in position; and a transmission member transmitting between the yoke and the locking means. The actuator includes a piston able to move in a cavity of the body, and has an external portion extending outside of the cavity and being provided with a ring whereon the lock means is intended to act.

Abstract: A firefighting installation includes a network of vacuum sprinklers. The installation incorporates a trip device that triggers the application of water to the network of sprinkler. The trip device includes: a master actuator sensitive to pressure present in the sprinkler network and capable of moving a yoke from a first to a second position; a lock for locking a member of the actuator in position; and a transmission member transmitting between the yoke and the locking means. The master actuator includes a membrane able to move between a first position corresponding to the sprinkler network being under vacuum and a second position corresponding to the sprinkler network being subject to atmospheric pressure, the first and second positions of the membrane corresponding to the first and second positions of the yoke.

Abstract: A sprinkler includes: a fixing connector, which allows the sprinkler to be connected to pipework and has a nozzle; a fusible member; a shutoff member for shutting off the nozzle, held in shutoff position by the fusible member; and an ejecting element for ejecting the shutoff member. The ejecting element is mounted outside the duct and acts in a pulling sense on the shutoff member.

Abstract: A sprinkler is provided for a firefighting installation including a network of vacuum sprinklers. The sprinkler includes: a fixing connector, which allows the sprinkler to be connected to pipe work and has a nozzle; a fusible member; and a shutoff member for shutting off the nozzle, held in shutoff position by the fusible member. The fusible member is kept bearing against the shutoff member by a moveable bearing, capable of allowing the shutoff member to leave its shutting-off position when the pressure in the nozzle exceeds a predetermined pressure. An ejecting element for ejecting the shutoff member is mounted outside the nozzle and acts in a pulling sense on the shutoff member.

Abstract: A dry riser intended to be mounted in a fire protection installation, of the type including a network of vacuum sprinklers. The riser includes an elongate body having, at one of its ends, a connecting piece for coupling to piping, the connecting piece including a first nozzle capable of making a connection between the riser and the piping. The riser includes a shutoff member for shutting off the first nozzle. The other end of the riser bears a sprinkler. A connection is provided between the shutoff member that shuts off the first nozzle and a shutoff member that shuts off the nozzle of the sprinkler. The connection is configured to move in such a way as to cause a shutting-off position of the shutoff member of the sprinkler nozzle to coincide with a shutting-off position of the shutoff member that shuts off the first nozzle.

Abstract: A firefighting installation includes a network of vacuum sprinklers. The installation incorporates a trip device that triggers the application of water to the network of sprinkler. The trip device includes: a master actuator sensitive to pressure present in the sprinkler network and capable of moving a yoke from a first to a second position; a lock for locking a member of the actuator in position; and a transmission member transmitting between the yoke and the locking means. The master actuator includes a membrane able to move between a first position corresponding to the sprinkler network being under vacuum and a second position corresponding to the sprinkler network being subject to atmospheric pressure, the first and second positions of the membrane corresponding to the first and second positions of the yoke.

Abstract: A sprinkler includes: a fixing connector, which allows the sprinkler to be connected to pipework and has a nozzle; a fusible member; a shutoff member for shutting off the nozzle, held in shutoff position by the fusible member; and an ejecting element for ejecting the shutoff member. The ejecting element is mounted outside the duct and acts in a pulling sense on the shutoff member.

Abstract: A firefighting installation includes a network of vacuum sprinklers. The installation incorporates a trip device that triggers the application of water to the network of sprinklers. The trip device includes: a master actuator sensitive to the pressure present in the sprinkler network and capable of moving a yoke from a first to a second position; a lock for locking a member of the actuator in position; and a transmission member transmitting between the yoke and the locking means. The actuator includes a piston able to move in a cavity of the body, and has an external portion extending outside of the cavity and being provided with a ring whereon the lock means is intended to act.

Abstract: A sprinkler is provided for a firefighting installation including a network of vacuum sprinklers. The sprinkler includes: a fixing connector, which allows the sprinkler to be connected to pipe work and has a nozzle; a fusible member; and a shutoff member for shutting off the nozzle, held in shutoff position by the fusible member. The fusible member is kept bearing against the shutoff member by a moveable bearing, capable of allowing the shutoff member to leave its shutting-off position when the pressure in the nozzle exceeds a predetermined pressure. An ejecting element for ejecting the shutoff member is mounted outside the nozzle and acts in a pulling sense on the shutoff member.

Abstract: Admixed glass frits and conductor-forming materials are applied directly to selected portions of the smooth-surface, doped areas of photovoltaic cells, and then are fired to form electrical contacts for those smooth-surface, doped areas. Those conductor-forming materials form electrical contacts that have essentially-linear, low resistance, electrical connections with those smooth-surface, doped areas and also provide exposed surfaces to which leads can be bonded; and those glass frits fuse to the smooth surfaces of the doped areas of those photovoltaic cells to provide sturdy mechanical bonds between those electrical contacts and those smooth-surface, doped areas.