# US 2019/0318887 A1 · Illuminated visible break > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0318887 A1 - Document ID: US20190318887A1 - Status: Published application - Kind: A1 - Application number: 16/364,289 - Filed: 2019-03-26 - Published: 2019-10-17 - Earliest claimed: 2018-04-17 - Assignees: Eaton Intelligent Power Limited - Applicants: Eaton Intelligent Power Limited - Inventors: Laurence James Geist; Joseph Allen Carmichael; Matthew Stephen Weidemeier - Web page: https://patentgrep.com/patent/US20190318887A1 ## CPC - H05B 47/10: Controlling the light source - G02B 6/0055: {Reflecting element, sheet or layer} - H01H 9/02: Bases, casings, or covers (accommodating more than one switch or a switch and another electrical component H02B1/26) - H01H 9/26: for interlocking two or more switches ({H01H13/568 takes precedence;} by a detachable member H01H9/28 {; for electromagnetic relays H01H50/323}) - H02B 1/06: having associated enclosures, e.g. for preventing access to live parts - H01H 9/161: {comprising light emitting elements} - H01H 2009/0292: {Transparent window or opening, e.g. for allowing visual inspection of contact position or contact condition} - H02B 1/306: {Accessories, e.g. windows} - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00) - H02B: BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER ## Abstract An assembly for use in an electrical power distribution system includes a housing that includes an interior space; an electrical apparatus in the interior space, the electrical apparatus including an electrical connection mechanism that is configured to move between at least two positions; an observation port through the housing, the observation port being configured to allow visual observation of the electrical connection mechanism in the interior space from an exterior of the housing; and an optical guide between the interior space and a light source. The light source is outside of the interior space and the optical guide is configured to deliver light from the light source to the interior space when the light source emits light. ## Claims ### Claim 1 An assembly for use in an electrical power distribution system, the assembly comprising: a housing comprising an interior space; an electrical apparatus in the interior space, the electrical apparatus comprising an electrical connection mechanism that is configured to move between at least two positions; an observation port through the housing, the observation port being configured to allow visual observation of the electrical connection mechanism in the interior space from an exterior of the housing; and an optical guide between the interior space and a light source, wherein the light source is outside of the interior space and the optical guide is configured to deliver light from the light source to the interior space when the light source emits light. ### Claim 2 (depends on 1) The assembly of claim 1, further comprising a control panel comprising a control switch configured to control an amount of light emitted from the light source. ### Claim 3 (depends on 2) The assembly of claim 2, wherein the control panel is at the exterior of the housing, and the control panel further comprises the light source. ### Claim 4 (depends on 2) The assembly of claim 2, wherein the housing comprises one or more additional interior spaces, and the light source is in one of the additional interior spaces. ### Claim 5 (depends on 1) The assembly of claim 1, wherein the light source is separate and distinct from the assembly. ### Claim 6 (depends on 5) The assembly of claim 5, wherein the separate and distinct light source comprises a light source configured to be manipulated by a human operator. ### Claim 7 (depends on 1) The assembly of claim 1, wherein an exterior of the electrical connection mechanism comprises a material that emits light in response to receiving light from the light source. ### Claim 8 (depends on 1) The assembly of claim 1, wherein the electrical connection mechanism comprises at least two electrical contacts, the at least two electrical contacts comprising a movable contact and a stationary contact. ### Claim 9 (depends on 8) The assembly of claim 8, wherein the electrical connection mechanism comprises at least a first stationary contact and a second stationary contact, the movable contact is configured to move between the first stationary contact and the second stationary contact, and one of the first stationary contact or the second stationary contact comprises a service contact and the other of the first stationary contact or the second stationary contact comprises a ground contact. ### Claim 10 (depends on 1) The assembly of claim 1, wherein the housing encloses a solid dielectric switchgear. ### Claim 11 (depends on 1) The assembly of claim 1, wherein the optical guide comprises an optical fiber or a flexible pipe configured to pass light through an interior region of the flexible pipe. ### Claim 12 (depends on 1) The assembly of claim 1, wherein the optical guide comprises a rigid structure that defines an open region configured to pass light. ### Claim 13 An assembly for use in an electrical power distribution system, the assembly comprising: a housing comprising an interior space; an electrical apparatus in the interior space, the electrical apparatus comprising an electrical connection mechanism configured to move between at least two positions; and an observation port through the housing, the observation port being configured to allow visual observation of the electrical connection mechanism in the interior space from an exterior of the housing, wherein an exterior surface of the electrical connection mechanism comprises a material that emits light in response to receiving light from a light source, the material being configured to emit light after receiving light from the light source and while the light from the light source is not illuminating the material. ### Claim 14 (depends on 13) The assembly of claim 13, further comprising an illumination port through the housing, wherein the illumination port is separate from the observation port, and the illumination port is configured to deliver light from the light source into the interior space. ### Claim 15 An assembly for use in an electrical power distribution system, the assembly comprising: a housing comprising a plurality of distinct interior spaces; an electrical apparatus in each of the distinct interior spaces, the electrical apparatus comprising an electrical connection mechanism configured to move between at least two positions; an illumination port through the housing; an optical source mounted in the illumination port; an optical guide assembly mounted in the illumination port, the optical guide assembly comprising: a plurality of optical guides, each optical guide comprising a first end and a second end, the first end of each of the optical guides being configured to receive light from the optical source and the second end of the optical guide being configured to deliver at least some of the received light to one of the distinct interior spaces; and a plurality of observation ports through the housing, each of the plurality of observation ports being configured to allow visual observation of the electrical connection mechanism in one of the plurality of distinct interior spaces from an exterior of the housing, wherein the observation ports are physically separate from the illumination port. ### Claim 16 (depends on 15) The assembly of claim 15, wherein an exterior surface of the electrical connection mechanism comprises a material that reflects or emits light in response to receiving light from a light source.