# US 2014/0190801 A1 · Shutter system for a switchgear compartment and method of manipulating a shutter system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0190801 A1 - Document ID: US20140190801A1 - Status: Published application - Kind: A1 - Application number: 13/735,518 - Filed: 2013-01-07 - Published: 2014-07-10 - Earliest claimed: 2013-01-07 - Assignees: General Electric Company - Applicants: General Electric Company - Inventors: Dean Arthur Robarge; Brittany Leigh Estes; Michael Paul Lafond; Joseph Gustave Nagy; Jason William Newby; Gerald John Witkoski - Web page: https://patentgrep.com/patent/US20140190801A1 ## CPC - H01H 9/22: for interlocking between casing, cover, or protective shutter and mechanism for operating contacts {(explosion-proof cases H01H9/045; built-in fuses and interlocking mechanisms H01H9/104; by automatic release of circuit breakers H01H71/126)} - H02B 11/24: Shutters or guards - 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 A shutter system for a switchgear compartment includes a moveable shutter translatable between a closed position and an open position. Also included is a pusher operatively coupled to a first side of the moveable shutter and configured to impart a force on the moveable shutter in response to an insertion of an electrical device within the switchgear compartment. Further included is a cam member having a cam shaft operatively coupled to the moveable shutter, the cam shaft having a cam track. Yet further included is a bell crank configured to guide along the cam track and translate the moveable shutter between the closed position and the open position. ## Claims ### Claim 1 A shutter system for a switchgear compartment comprising: a moveable shutter translatable between a closed position and an open position; a pusher operatively coupled to a first side of the moveable shutter and configured to impart a force on the moveable shutter in response to an insertion of an electrical device within the switchgear compartment; a cam member having a cam shaft operatively coupled to the moveable shutter, the cam shaft having a cam track; and a bell crank configured to move along the cam track of the cam shaft and translate the moveable shutter between the closed position and the open position. ### Claim 2 (depends on 1) The shutter system of claim 1, wherein the bell crank includes at least one protrusion disposed along an inner surface of the bell crank and operatively coupled to the cam track, the at least one protrusion configured to move along the cam track. ### Claim 3 (depends on 1) The shutter system of claim 1, further comprising a fixed shutter having a first surface disposed proximate a second side of the moveable shutter and defining a plurality of fixed shutter apertures. ### Claim 4 (depends on 3) The shutter system of claim 3, wherein the moveable shutter defines a plurality of moveable shutter apertures, wherein the plurality of moveable shutter apertures is aligned with the plurality of fixed shutter apertures in the open position, and wherein the plurality of moveable shutter apertures is misaligned with the plurality of fixed shutter apertures in the closed position. ### Claim 5 (depends on 3) The shutter system of claim 3, further comprising a retainer plate disposed proximate a second surface of the fixed shutter and secured to the pusher, the cam shaft operatively coupled to the retainer plate. ### Claim 6 (depends on 5) The shutter system of claim 5, wherein the retainer plate includes an opening configured to receive an aft portion of the bell crank, the opening defining a bell crank axis of rotation. ### Claim 7 (depends on 1) The shutter system of claim 1, the pusher comprising a relatively U-shaped inner surface, the cam shaft disposed on the relatively U-shaped inner surface. ### Claim 8 (depends on 5) The shutter system of claim 5, further comprising a spring disposed between the retainer plate and a cam base portion of the cam member, the spring configured to bias the fixed shutter and the moveable shutter away from the cam base portion. ### Claim 9 (depends on 8) The shutter system of claim 8, wherein the spring is configured to position the moveable shutter in the closed position. ### Claim 10 A shutter system for a switchgear compartment comprising: a fixed shutter defining a plurality of fixed shutter apertures; a moveable shutter defining a plurality of moveable shutter apertures, the moveable shutter comprising an open position and a closed position, wherein the plurality of moveable shutter apertures is aligned with the plurality of fixed shutter apertures in the open position, and wherein the plurality of moveable shutter apertures is misaligned with the plurality of fixed shutter apertures in the closed position; a pusher operatively coupled to a first side of the moveable shutter; a bell crank in operable communication with the moveable shutter; and a cam member operably coupled to at least one wall of a breaker compartment and comprising a cam shaft operatively coupled to the fixed shutter and the moveable shutter, the cam member having a cam track configured to guide the bell crank to translate the moveable shutter between the closed position and the open position. ### Claim 11 (depends on 10) The shutter system of claim 10, wherein the bell crank includes at least one protrusion disposed along an inner surface of the bell crank and operatively coupled to the cam track, the at least one protrusion configured to guide along the cam track. ### Claim 12 (depends on 10) The shutter system of claim 10, further comprising a retainer plate disposed proximate the fixed shutter and secured to the pusher, the cam shaft operatively coupled to the retainer plate. ### Claim 13 (depends on 12) The shutter system of claim 12, wherein the retainer plate includes an opening configured to receive an aft portion of the bell crank. ### Claim 14 (depends on 10) The shutter system of claim 10, the pusher comprising a relatively U-shaped inner surface, the cam shaft disposed on the relatively U-shaped inner surface. ### Claim 15 (depends on 12) The shutter system of claim 12, further comprising a spring disposed between the retainer plate and a cam base portion of the cam member, the spring configured to bias the fixed shutter and the moveable shutter away from the cam base portion. ### Claim 16 (depends on 15) The shutter system of claim 15, wherein the spring is configured to position the moveable shutter in the closed position. ### Claim 17 A method of manipulating a shutter system for a switchgear compartment comprising: imparting a force on a pusher operatively coupled to a first side of a moveable shutter; rotating and translating a bell crank along a cam track of a cam shaft extending through the moveable shutter, the bell crank in operable communication with the moveable shutter; and translating the moveable shutter from a closed position to an open position upon rotation of the bell crank. ### Claim 18 (depends on 17) The method of claim 17, further comprising guiding a protrusion extending inwardly from an inner surface of the bell crank along the cam track for guiding the bell crank. ### Claim 19 (depends on 17) The method of claim 17, further comprising compressing a spring disposed between a fixed shutter and a cam base portion of a cam member during translation of the moveable shutter from the closed position to the open position, the spring biasing the fixed shutter and the moveable shutter away from the cam base portion toward the open position. ### Claim 20 (depends on 17) The method of claim 17, further comprising: aligning a plurality of moveable shutter apertures of the moveable shutter with a plurality of fixed shutter apertures of a fixed shutter in the open position; and misaligning the plurality of moveable shutter apertures with the plurality of fixed shutter apertures in the closed position.