MACHINES OR ENGINES FOR LIQUIDS (for liquids and elastic fluids Fulltext... Hierarchy... Expanded...F01; positive-displacement machines for liquids Fulltext... Hierarchy... Expanded...F04); WIND, SPRING, WEIGHT, OR MISCELLANEOUS MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
In this class, the following terms are used with the meanings indicated:
"Combustion" means the direct combination of oxygen gas, e.g. in air, and a burnable substance. Any other heat-producing combination of chemical substances, e.g. hydrogen peroxide and methane, iron oxide and aluminium, is provided for in Section C or in sub-class Fulltext... Hierarchy... Expanded...F24J.
"Combustion chamber" means a chamber in which fuel is burned to establish a self-supporting fire or flame and which surrounds that fire or flame.
"Burner" means a device by which fluent fuel is passed to a combustion space where it burns to produce a self-supporting flame.
"Air" means a mixture of gases containing free oxygen and able to promote or support combustion.
This class deals with furnaces, kilns, ovens, retorts, open sintering apparatus, and details or accessories therefor, in general. It includes the arrangement of electrical heating elements in or on furnaces, but not the elements themselves. It is not concerned with the processes carried on within the furnaces.
In this class, where appropriate, the term "furnaces" is to be understood as covering kilns, ovens, or retorts.
In this class, the following terms are used with the meanings indicated:
"Semi-automatic firearm" — a firearm from which one shot is fired after actuation of the trigger and which then returns to a condition for firing a subsequent shot upon renewed actuation of the trigger.
"Automatic gun" — a gun which will continue firing so long as the initial firing pressure is maintained on the trigger.
"Sighting" — bringing into visual coincidence a direction defined by a so-called "sighting" device with the direction of a target.
"Aiming" — bringing a weapon to a direction differing from the sighting direction by corrections in order that the projectile may hit the target.
"Laying" — setting a weapon in the correct position for hitting a mark.
In this class, the following terms are used with the meanings indicated:
"Primer" effects the first explosive step in the sequence of explosion.
"Percussion cap" — a primer which is struck to explode.
"Igniter" effects the first spark-producing or heat-producing step but may not be explosive.
"Firing-means", "initiator" (used respectively in the arts of weaponry and blasting) — the device acting directly on the primer, which device may or may not form part of the fuze.
"Detonator charge" — a charge used to amplify the explosion of the primer.
"Fuze" — an assembly which determines the moment of the explosion (instantaneous or delayed) and which incorporates firing-means for initiating the explosion spark.
"Ammunition" covers expulsion charge and projectile whether or not forming a single body, unless otherwise made clear. [2]