(under subclass 257) Subject matter having a means (e.g., gasket) filling the space between two adjacent elements to prevent matter on one side of the elements from passing between them to the other side or having a gas other than air in contact, at least in part, with the source, support therefor, or modifier.
(1) Note. Mere recitation of a "sealed" light source (or support therefor) and modifier (e.g., "sealed-beam head lamp") is insufficient basis for classification in this subclass if the sealing means itself is not recited.
SEE OR SEARCH THIS CLASS, SUBCLASS:
306, for resilient means to force a source or modifier element into engagement with another adjacent element without a sealing means between the two elements.
310, for housing means for a light source or light source
support and modifier without a sealing means between two adjacent parts.
