DefinitionThis class relates only to automatic temperature and humidity regulation, and is not to include the system where the thermostatic control constitutes but an element of the system, even though the system includes temperature regulation, such, for example, as refrigeration, where the refrigerating structure or method is claimed. Systems are also excluded where the specific burner structure, specific boiler structure, specific heat-exchange element, specific fire extinguishing structure, specific heat distributing system, specific internal-combustion engine structure, specific furnace structure, specific gas producer structure or method, specific heating and molding devices, etc., are claimed--that is, this class is confined to automatically operating temperature or humidity controlling mechanism, but excludes all patents to the specific mechanism controlled, even though the thermostat is claimed, either broadly or specifically, in combination therewith. (1) Note. This class includes only patents for devices which control temperature or humidity automatically, but not those which are merely operated by temperature variation. The only apparent exceptions are the heating radiator thermostatic air relief valves, the thermostatic steam traps and thermostatically operated regulating valves. (2) Note. This class provides for all heating radiator automatic air relief valves including a thermostat. (3) Note. This class provides for all automatic steam traps including a thermostat in the combination. (4) Note. Patents for devices for controlling the flow of air over an automobile radiator by means of a thermostat located either in the cooling water or under the hood are classified in this class unless some novelty in the engine or cooling system is claimed. |
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