(under the class definition) Lamps which are provided with a glower or filament adapted to be heated to incandescence by the passage of an electric current therethrough.
(1) Note. The glower or filament may be but need not be contained within an enclosing envelope.
(2) Note. This is residual subclass and provides only for incandescent lamps which are not specifically provided for in the subclasses above. Where the incandescent lamp is
provided for in some general subclass above such as subclasses 11+ (with temperature modifier), and is not cross-referenced to a subclass specifically providing for incandescent lamps and structure of the lamp is claimed in addition to that provided for in either the general or specific subclass, the patent is cross-referenced into this subclass. The notes below refer to subclasses above which specifically provide for incandescent lamps.
(3) Note. Where the only significant lamp structure recited is the envelope, or the envelope and the base for the envelope, the filament or light emitting body being recited broadly or by name only, and where there is no relationship recited between the filament or the light emitting body and the envelope except that the filament or body is within the envelope, the patent is classified in subclasses 317+. For example, a claim directed to a particular shaped envelope which states merely that there is a filament or light emitting body within the envelope is classified in subclass 317. A claim which includes an envelope, either broadly or specifically recited, and a base and which state merely that the envelope contains a filament or light emitting body is classified in subclasses 318.01+.
(4) Note. Where the only significant lamp structure recited is the structure of the filament or glower with or without a lead wire or connector, the claim merely stating that the filament or glower is within or a part of an incandescent lamp, the patent is classified in subclasses 326+, especially in subclasses 341+. For example, a claim which recites an incandescent lamp provided with a filament of a particular structure without stating any other relationship of the filament to the other parts of the lamp is classified in subclasses 326+. Where the patent claims an envelope having a filament or glower being defined by either its structure or by its composition, the patent is classified in this subclass (315).
SEE OR SEARCH THIS CLASS, SUBCLASS: 1+, for plural unit devices under the class definition which include at least one incandescent lamp unit and a discharge device unit. Note that incandescent lamps having only plural filaments or glowers are not classified in subclasses 1+ but are in indented subclass 316.
9, for incandescent lamps which include a filament or glower and a separate body, not an electrode, which is designed to be heated to incandescence by the filament or glower.
110+, for incandescent lamps which have integrally combined therewith an optical device or which have the envelope made of a material which transmits a particular portion of the spectrum (e.g., ultraviolet light). See subclass 112 where the optical device is a polarizer, a filter or where the envelope is special ray transmissive. See subclasses 113+ where the optical device is a reflector; subclass 116 where
the optical device is a light diffusing means and subclass 117 where the optical device is a light valve or light obscuring means.
235, for incandescent lamps which include two electrodes which are maintained in imperfect contact, the lamps being designed so that the passage of electric current from one electrode to the other produces light adjacent the ends of the electrodes which are in contact with each other.
271+, for incandescent lamps having supporting and/or spacing structure for the filament or glower. Where the only significant lamp structure recited is the supporting and/or spacing structure for the filament or glower either with or without the enclosing envelope, the patent is classified in subclasses 271+ of this class. Where the structure is disclosed or claimed in addition to the filament or glower supporting and/or spacing structure, the patent is classified in subclasses 271+ and cross-referenced to this or the indented subclass.
313, for incandescent lamps provided with means for preventing the accumulation of static charges upon parts of the lamp or for preventing undesired arc or other discharges between the parts of the lamp.
314, for incandescent lamps which are provided with means which prevents repair of the incandescent lamp.
331+, for the structure of lamp filaments and glowers which have combined therewith a lead wire or connector. See (4) Note above.
341+, for the structure of filaments and glowers. See (4) Note above.
549+, where the incandescent lamp has an envelope which contains a getter, a gas or vapor generating material or is provided with means for regulating the pressure within the envelope.
578+, where the incandescent lamp has an envelope which contains a gas or vapor. SEE OR SEARCH CLASS
315, Electric Lamp and Discharge Devices: Systems,
32+, especially subclasses 32, 46+, 49, 51+, and 64 through 74 for incandescent lamps which have structurally combined therewith a circuit element such as an electric switch or an impedance. See subclasses 46+ for the structural combination of an incandescent lamp and a discharge device where the lamp filament is connected in shunt relation to the discharge electrode, subclass 49 for the structural combination of an incandescent lamp and a discharge device where the lamp filament is connected in series with the discharge device.
See subclasses 51+ where the incandescent lamp has a plurality of circuit elements combined therewith.
