Abstract: A heat-responsive element has two links joined with a thin solder layer in a face-to-face relationship over an extended surface area. The components of opposed surfaces of the links in contact with the solder layer and the solder layer are adapted to alloy with each other in the regions immediately adjacent each opposed surface to form alloy bonds between the opposed surfaces and the solder layer. The strength of these bonds is greater than the strength of the solder layer. At least the opposed surfaces of the links consist, at least in part, of an alloy-forming amount of nickel, cobalt, chromium or iron, or an alloy of nickel, cobalt, chromium, or iron.

Abstract: A linkage element for releasing a mechanism under influence of temperature, such as a fire extinguishing sprinkler or ventilation shutter. The element must be capable of retaining a maximum bias force, but has also to show a short response time to excessive temperature conditions. The linkage element comprises a pair of coplanar flat jaws, opposite to each other and having a common base. The resistance to flexion in the plane of each jaw is high, whereas the resistance in a plane perpendicular thereto is low. The element further comprises a shape memory alloy, treated for moving the jaws apart from each other in a direction perpendicular to the plane of the jaws when the critical temperature is reached. The element is preferably made in the form of a small thin plate of shape memory alloy.

Abstract: Fire sprinkler head suitable for mounting in a concealed location in the ceiling in a residential dwelling which provides quick and automatic response in the event of a fire. The valve assembly in the sprinkler head is biased to the open mode and is maintained in the closed mode against a positive force tending to move the valve assembly to the open mode by a valve closure which is separable into its two sections at the onset of a fire and the attainment of a predetermined ambient temperature surrounding the valve closure. The two sections of the valve closure are maintained intact as a unit until the temperature of the fire melts a heat fusible alloy composition.

Abstract: A liquid discharge nozzle that is operative for discharging liquid in a relatively narrow, elongated spray pattern. The nozzle includes a deflector having an elongated central apex portion of preferably arcuate configuration and a pair of side portions diverging from opposite side edges of the apex portion and having tines formed along the terminal edges thereof; and a frame for mounting the deflector adjacent a liquid discharge outlet so that when liquid is discharged from the outlet, at least a portion of the liquid impinges on the inner surface of the central portion of the deflector and is deflected outwardly along the inner surfaces of the deflector. Preferably, a substantially centrally disposed inwardly projecting boss of generally elliptical configuration is formed in the central apex portion of the deflector and a deflector mounting boss is formed on the frame adjacent the deflector boss.

Abstract: A sprinkler head includes a nozzle, a frame and a rigid mechanical fusible link assembly positioned between the frame and a closure plug or cap. An annular, normally concave spring is disposed between the cap and the nozzle. The spring creates a force which throws the link assembly clear of the head upon actuation.

Abstract: An apparatus for moving a controlled member, as for example a valve, to a predetermined position in response to temperature conditions includes a bearing member which overcomes a force exerted by an energy storage device within a predetermined temperature range. The bearing member includes a fusible material which melts in another predetermined temperature range to enable the force exerted by the energy storage device to overcome the bearing member and to move the controlled member to a fail-safe position.

Abstract: The invention features improved fluid deflection techniques for a pendent-type fire-protection sprinkler head. A first deflecting surface facing generally upward is positioned in the path of fluid emerging from the body of the sprinkler and includes a portion spaced to circumferentially redistribute the fluid to improve uniformity of distribution and deflect at least some of the fluid generally outward. A second deflecting surface positioned radially outward and away from the first deflecting surface receives and controls the distribution of a portion of the outwardly moving water from the first surface; the path of emerging fluid from the sprinkler head body to the first deflector surface extends through an interior opening in the second deflector surface; and the second surface is separated from the first surface by a circumferentially unobstructed region so that the circumferential distribution of the fluid leaving the first surface is not divided as it moves between the first and second surfaces.

Abstract: A brazing fixture having an arrangement for indexing the teeth of a saw blade successively into register with a laying block. The block is so constructed as to accurately locate the pre-top-ground tips on successive teeth so that the tips can be brazed to the teeth with their cutting edges in a common circle about the axis of the saw blade. The invention also contemplates a method of providing a saw blade with the cutting edges of tips in a common circle comprising providing top ground tips, indexing a saw successively into register with an application zone, and at the zone abutting the cutting edges of the tips successively against a locator face and securing the tips to the teeth in such position.

Abstract: A fire extinguishing apparatus and method of extinguishing a fire employing same are provided for an engine compartment of an engine drive vehicle in which the vehicle has an engine and a cooling system therefor employing a cooling liquid under pressure and the fire extinguishing apparatus comprises a system operatively connected to the cooling system for employing the cooling liquid under pressure and automatically spraying the cooling liquid in the compartment in response to a fire therein.

Abstract: A sprinkler head adapted to jet water or fire extinguishing liquid with its valve automatically detached when the room temperature is raised to such extent that there is a danger of the outbreak of a fire or when the room temperature is raised due to the outbreak of a fire in a room inside a general building, wherein a water discharge valve seat is provided in the lower center of a discoidal body, a plurality of supporting legs being formed on the outside or both sides of the valve seat, the valve held in contact with the valve seat being sustained by a heat sensitive sustaining unit comprising a plurality of levers engaged with receivers of the supporting legs, a fusible member and the like, a deflector having a multiplicity of sprinkling outlets being mounted on the lower part of the discoidal body.

Abstract: A sprinkler head with a valve automatically detachable when the temperature is raised to such extent that there is a danger of the outbreak of a fire in a room. The sprinkler head has a water discharge valve seat in the lower center of a discoidal body, a plurality of supporting legs being formed on the outside of the valve seat. A valve in contact with the valve seat is supported by a heat sensitive sustaining unit having a plurality of levers, a fusible retainer disposed on said supporting legs holding the valve and the cover. A deflector made of a thin material having a multiplicity of sprinkling outlets is mounted on the lower part of the body. There is a cover on the outer side of the deflector which is released by the heat sensitive unit.

Abstract: An improved concealed sprinkler head for an automatic sprinkler system. The sprinkler head includes an orifice body that is mounted above the ceiling of the building and is connected to the water line. The body has an outlet which is normally closed by a valve cap, and the cap is held in the closed position by a lever assembly which includes a lever and a leaf spring. The lever has a pair of parallel spaced arms and a tube, which houses a fusible metallic element, extends between the arms. Balls are located within the ends of the tube on either side of the fusible element and impressed into the ends of the element, and the balls are engaged with sockets in the arms. One end of the lever is engaged with an abutment on the valve body and the opposite end of the lever is engaged with the leaf spring which is fulcrummed on the abutment. The leaf spring bears against the tube and urges the tube in a downward direction.

Abstract: A sprinkler is provided with a plurality of sprinkling apertures having peripheral portions therein formed substantially perpendicularly to a floor surface over which the water is to be directed, thereby permitting more than a predetermined quantity of water to be sprinkled without specific directivity over the entire range of a predetermined area both under high and low hydraulic pressures.

Abstract: An improved concealed sprinkler head for an automatic sprinkler system. The sprinkler head includes an orifice body that is mounted above the ceiling of the building and is connected to the water line. The body has an outlet which is normally enclosed by a valve cap, and the cap is held in the closed position by a latch assembly which includes a latch bar. One end of the latch bar is provided with a projection which engages an abutment on the orifice body while the opposite end of the latch bar is provided with a recess which contains a fusible metallic element, and a movable member, such as a ball or a series of balls, is engaged with the fusible element and projects outwardly from the latch bar and is engaged with a second abutment on the orifice body. The latch bar carries a decorative plate that is mounted flush against the ceiling and has a series of openings to provide improved heat transfer to the fusible element.