An aerial shell comprising at least one combustible layer of combustible material, the at least one combustible layer including an outermost combustible layer surrounding the at least one combustible layer, the outermost combustible layer configured to ignite on substantially an entire outer surface, the outermost combustible layer including a relatively higher combustion rate than the at least one combustible layer; the at least one combustible layer including an innermost combustible layer surrounding and containing at least one pyrotechnic effect and a dispersive explosive charge; the at least one pyrotechnic effect is preferentially disposed with respect to the innermost combustible layer at least one of immediately adjacent including integral with an inner surface of the innermost combustible layer and spaced away from the inner surface of the innermost combustible layer; the at least one combustible layer configured to burn substantially throughout the at least one combustible layer.

An aerial shell comprising at least one combustible layer of combustible material, the at least one combustible layer including an outermost combustible layer surrounding the at least one combustible layer, the outermost combustible layer configured to ignite on substantially an entire outer surface, the outermost combustible layer including a relatively higher combustion rate than the at least one combustible layer; the at least one combustible layer including an innermost combustible layer surrounding and containing at least one pyrotechnic effect and a dispersive explosive charge; the at least one pyrotechnic effect is preferentially disposed with respect to the innermost combustible layer at least one of immediately adjacent including integral with an inner surface of the innermost combustible layer and spaced away from the inner surface of the innermost combustible layer; the at least one combustible layer configured to burn substantially throughout the at least one combustible layer.

A gas hearth including a combustion chamber, a gas supplier for supplying combustible gas into the combustion chamber to a firebed simulator disposed in the combustion chamber, an ignitor for igniting the combustible gas in the combustion chamber, a flue-gas discharge duct connected to the combustion chamber for discharging combustion flue gases from the combustion chamber, and a metering means disposed in the combustion chamber for metering a pyrotechnical additive into the flames of the burning combustible gas during operation.

A gas hearth including a combustion chamber, a gas supplier for supplying combustible gas into the combustion chamber to a firebed simulator disposed in the combustion chamber, an ignitor for igniting the combustible gas in the combustion chamber, a flue-gas discharge duct connected to the combustion chamber for discharging combustion flue gases from the combustion chamber, and a metering means disposed in the combustion chamber for metering a pyrotechnical additive into the flames of the burning combustible gas during operation.

The present invention relates to a combined fireworks with launching pits and multi-channel fireproof structures comprising a body, several tubular cavities are uniformly arranged on the body with the upper ports thereof are open and the lower ports thereof are closed, inner cylinders of fireworks and propellants are arranged inside the tubular cavity, the bottom of each tubular cavity is provided with annular grooves and launching pits. The bottom surface of the body is provided with several fireproof bosses, the position of each fireproof boss corresponds to each tubular cavity in the body respectively, and recessed countersinks are arranged on the fireproof bosses, the priming holes are arranged within the recessed countersinks, one end opening of the priming hole is located on the bottom surface of the launching pit, and the other end opening of the priming hole is located in the recessed countersinks. The present invention solves the problem of directional instability and unfocused acting force of the inner cylinders of fireworks during launching. With multi-channel fireproof structures protruding from the bottom surface, this invention can also prevent crossfire during launching.

The present invention relates to a combined fireworks with launching pits and multi-channel fireproof structures comprising a body, several tubular cavities are uniformly arranged on the body with the upper ports thereof are open and the lower ports thereof are closed, inner cylinders of fireworks and propellants are arranged inside the tubular cavity, the bottom of each tubular cavity is provided with annular grooves and launching pits. The bottom surface of the body is provided with several fireproof bosses, the position of each fireproof boss corresponds to each tubular cavity in the body respectively, and recessed countersinks are arranged on the fireproof bosses, the priming holes are arranged within the recessed countersinks, one end opening of the priming hole is located on the bottom surface of the launching pit, and the other end opening of the priming hole is located in the recessed countersinks. The present invention solves the problem of directional instability and unfocused acting force of the inner cylinders of fireworks during launching. With multi-channel fireproof structures protruding from the bottom surface, this invention can also prevent crossfire during launching.

A protective firework apparatus may include a wall configured to at least partially surround a firework, according to various embodiments. The wall may be configured to protect at least one of spectators and property from errant firework emission by at least one of providing a protective barrier between the firework and the at least one of spectators and property and supporting the firework in a desired position to prevent errant firework emission. In various embodiments, the wall comprises a plurality of wall panels that, in an installed state, collectively define a shape surrounding the firework. The plurality of wall panels may be coupled together, and/or the plurality of wall panels may be collapsible such that the protective firework apparatus may be collapsed to a collapsed/storable/storage state.

A fireworks connection structure for continuous discharge of groups of fireworks, including a group of fireworks formed by a plurality of firework tubes, wherein the group of fireworks further comprises female connecting firework tubes arranged at the head end of the group of fireworks for igniting the group of fireworks and at least one male connecting firework tube matched with the female connecting firework tubes; the female connecting firework tube can be amounted above the male connecting firework tube of another group of fireworks; the female connecting firework tube is equipped with a fuse inside, of which one end is inside the female connecting firework tube and the other end extends beyond the female connecting firework tube for igniting the group of fireworks; the fuse is positioned in the female connecting firework tube in such a manner that after the female connecting firework tube is amounted above the male connecting firework tube of another group of fireworks, the male connecting firework tube of another group of fireworks may ignite the fuse. The connecting method of the application is convenient and simple for there is no need to connect the actual fuses manually, so that the risk of accidents upon connecting fuses may be prevented. Moreover, with this method, groups of fireworks can be connected and detached quickly, without any damage to the fireworks devices, making possible versatile combination and arrangement between fireworks groups in an easy manner.

A fireworks connection structure for continuous discharge of groups of fireworks, including a group of fireworks formed by a plurality of firework tubes, wherein the group of fireworks further comprises female connecting firework tubes arranged at the head end of the group of fireworks for igniting the group of fireworks and at least one male connecting firework tube matched with the female connecting firework tubes; the female connecting firework tube can be amounted above the male connecting firework tube of another group of fireworks; the female connecting firework tube is equipped with a fuse inside, of which one end is inside the female connecting firework tube and the other end extends beyond the female connecting firework tube for igniting the group of fireworks; the fuse is positioned in the female connecting firework tube in such a manner that after the female connecting firework tube is amounted above the male connecting firework tube of another group of fireworks, the male connecting firework tube of another group of fireworks may ignite the fuse. The connecting method of the application is convenient and simple for there is no need to connect the actual fuses manually, so that the risk of accidents upon connecting fuses may be prevented. Moreover, with this method, groups of fireworks can be connected and detached quickly, without any damage to the fireworks devices, making possible versatile combination and arrangement between fireworks groups in an easy manner.

A fireworks aerial display shell is provided with multiple casings of cylindrical configuration that are joined together in end-to-end relationship. Each casing defines an interior volume in which an effects charge is packed. A plug is positioned between the effects charges and has an opening through which an ignition source passes to ignite one of the effects charges as a result of burning of another of the effects charges. An outer casing may surround at least parts of the multiple cylindrical casings and includes multiple partially ball-shaped segments.