# US 10,121,624 B2 · Position indicator of air circuit breaker > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,121,624 B2 - Document ID: US10121624B2 - Status: Granted - Kind: B2 - Application number: 15/643,336 - Filed: 2017-07-06 - Published: 2018-06-28 - Granted: 2018-11-06 - Earliest claimed: 2016-12-27 - Assignees: Lsis Co., Ltd. - Applicants: Lsis Co., Ltd. - Inventors: Kyujung Kim - Web page: https://patentgrep.com/patent/US10121624B2 ## CPC - H01H 71/04: Means for indicating condition of the switching device {(by means of an auxiliary contact H01H71/46)} - H02B 11/10: Indicating electrical condition of gear; Arrangement of test sockets - 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 11/127: Withdrawal mechanism - 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 In the present disclosure, a link part is connected to a worm wheel rotated according to rotation of a worm gear and a movement member is connected to the link part, whereby a rotational motion of the worm wheel is changed to a translational motion in a horizontal direction through the link part and the movement member. Thus, although an indicator is positioned on an upper side of a handle insertion part, a position according to movement of a circuit breaker body may be easily indicated, while using a simple structure. ## Claims ### Claim 1 A position indicator of an air circuit breaker for indicating a position of a circuit breaker body according to movement of the circuit breaker body within a cradle, the position indicator comprising: a handle insertion part to which a handle is inserted; a worm gear rotated according to rotation of the handle inserted in the handle insertion part; a worm wheel rotated in association with the worm gear; a link part connected to the worm wheel in one end and connected to a movement member in the other end and moving a movement member in a horizontal direction according to rotation of the worm wheel; and an indicator inserted into the movement member in a state of being positioned above the handle insertion part, and indicating a position of the circuit breaker body, while rotating according to movement of the movement member in the horizontal direction. ### Claim 2 (depends on 1) The position indicator of claim 1, wherein a button part is positioned between the indicator and the handle insertion part and moves within the cradle to limit rotation of the worm gear or release limitation of the worm gear. ### Claim 3 (depends on 2) The position indicator of claim 2, wherein a movement adjustment lever is positioned between the indicator and the button part, wherein a catch recess is formed at an upper end of the button part, and wherein when the indicator rotates according to rotation of the handle, the movement adjustment lever rotates through the indicator so as to be caught in the catch recess or released from the catch recess. ### Claim 4 (depends on 3) The position indicator of claim 3, wherein a plurality of pressing protrusions are formed to be positioned above the movement adjustment lever on an outer circumferential surface of the indicator, and when the indicator rotates, the plurality of pressing protrusions press one end of the movement adjustment lever to release engagement between the other end of the movement adjustment lever and the catch recess. ### Claim 5 (depends on 4) The position indicator of claim 4, wherein a space part is formed between the pressing protrusions, and when the indicator rotates in a state that the pressing protrusions press the movement adjustment lever, one end of the movement adjustment lever rotates toward the space part and the other end of the movement adjustment lever is caught in the catch recess. ### Claim 6 (depends on 1) The position indicator of claim 1, wherein a rotation preventing member is formed to protrude toward the worm wheel on an inner side of the air circuit breaker, and a movement recess is formed at one end of the worm wheel to allow the rotation preventing member to be inserted and positioned in the movement recess, and when the rotation preventing member in a state of being inserted in the movement recess rotates to a drawn-in position or a drawn-out position, the rotation preventing member contacts each end of the movement recess and rotation of the worm wheel is limited in the drawn-in position or drawn-out position. ### Claim 7 (depends on 1) The position indicator of claim 1, wherein an indication part is formed at a front end of the indicator, and an indication portion indicating a drawn-out position, a test position, or a drawn-in position of the circuit breaker body is formed near the indication part in the air circuit breaker. ### Claim 8 (depends on 2) The position indicator of claim 2, wherein a protrusion is formed on an inner side of the button part and a recess is formed on an outer circumferential surface of the worm gear to allow the protrusion to be inserted in the recess, so that the protrusion is inserted into the recess according to movement of the button part to limit rotation of the worm gear.