# US 8,540,396 B2 · Lighting system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,540,396 B2 - Document ID: US8540396B2 - Status: Granted - Kind: B2 - Application number: 13/597,992 - Filed: 2012-08-29 - Published: 2012-12-20 - Granted: 2013-09-24 - Earliest claimed: 2008-11-28 - Assignees: Toshiba Lighting & Technology Corporation - Applicants: Satoshi Watanabe; Keiichi Shimizu; Takeshi Osada; Toshiya Tanaka; Shigeru Osawa; Takeshi Hisayasu; Hirokazu Otake; Hitoshi Kawano; Makoto Sakai - Inventors: Satoshi Watanabe; Keiichi Shimizu; Takeshi Osada; Keiichi Shimizu; Toshiya Tanaka; Shigeru Osawa; Takeshi Hisayasu; Hirokazu Otake; Hitoshi Kawano; Makoto Sakai - Web page: https://patentgrep.com/patent/US8540396B2 ## CPC - F21V 29/67: characterised by the arrangement of fans - F21K 9/20: Light sources comprising attachment means - F21V 19/001: {the light sources being semiconductors devices, e.g. LEDs} - F21V 29/73: the elements being adjustable with respect to each other, e.g. hinged - H01R 33/9456: {for bayonet type coupling devices} - F21V 19/006: {of point-like light sources, e.g. incandescent or halogen lamps, with screw-threaded or bayonet base (of sources having contact pins, wires or blades F21V19/0005; of LEDs or sources mounted on printed-circuit board F21V19/001)} - F21V 29/74: with fins or blades - F21Y 2115/10: Light-emitting diodes [LED] - Y10T 29/49879: Spaced wall tube or receptacle - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR - H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS - F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A lighting fixture capable of efficiently radiating heat of a lamp device may be configured to be attached to a socket device. In some examples, by attaching the lamp device to the socket device, a cap portion of the lamp device is brought into contact with a fixture body, and pressed against and brought into close contact with the fixture body by an elastic body. Heat generated by lighting of LEDs of the lamp device is conducted from the cap portion to the fixture body and efficiently radiated. ## Claims ### Claim 1 A lighting system comprising: a socket device including a socket device body defining an insertion hole, the socket device body including a first wall and a second wall, wherein both the first and second walls are disposed around the insertion hole and wherein the first wall surrounds the second wall; and a lamp device configured to be attached to the socket device via insertion into the insertion hole, wherein the socket device body further comprises: an elastic body being configured to press the lamp device, when attached to the socket device, in a direction of insertion through the insertion hole, wherein the elastic body is disposed exterior to the second wall and interior to the first wall in a direction orthogonal to the insertion direction; and a power supply portion disposed exterior to at least the second wall in the direction orthogonal to the insertion direction, wherein one of the socket device body and the lamp device includes a projection portion and another one of the socket device body and the lamp device includes a groove portion configured to receive the projection portion, and wherein the groove portion includes an introduction portion configured to receive initial insertion of the projection portion into the groove portion and an inclined portion configured to guide the projection portion to an engaged position with the groove portion. ### Claim 2 (depends on 1) The lighting system of claim 1, wherein the groove portion is provided on the socket device body and the projection portion is provided on the lamp device. ### Claim 3 (depends on 1) The lighting system of claim 1, wherein the groove portion is provided on the lamp device and the projection portion is provided on the socket device body. ### Claim 4 (depends on 1) The lighting system of claim 1, wherein the inclined portion is inclined in a direction in which the lamp device is configured to be inserted into the socket device body. ### Claim 5 A lighting socket device comprising: a first sidewall defining an insertion hole, the insertion hole configured to receive a lamp device therethrough; a second sidewall surrounding the first sidewall; and a power supply portion disposed exterior to the the first sidewall and interior to the second sidewall in a direction orthogonal to a direction in which the lamp device is received in the insertion hole, wherein the socket device includes one of: a projection portion and a groove portion configured to receive the projection portion, and wherein the groove portion includes an introduction portion configured to receive initial insertion of the projection portion into the groove portion and an inclined portion configured to guide the projection portion to an engaged position with the groove portion. ### Claim 6 (depends on 5) The lighting socket device of claim 5, the socket device comprising the projection portion. ### Claim 7 (depends on 5) The lighting socket device of claim 5, the socket device comprising the groove portion. ### Claim 8 (depends on 5) The lighting socket device of claim 5, further comprising an elastic body exterior to the first sidewall in the direction orthogonal to the direction in which the lamp device is received in the insertion hole.