# US 4,400,091 A · Second stop device of clock > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,400,091 A - Document ID: US4400091A - Status: Granted - Kind: A - Application number: 06/231,797 - Filed: 1981-02-05 - Granted: 1983-08-23 - Earliest claimed: 1980-02-05 - Assignees: Seiko Koki Kabushiki Kaisha - Inventors: Musuo Ogihara; Nobuo Shinozaki; Tadashi Ishikawa; Yoichi Seki - Web page: https://patentgrep.com/patent/US4400091A ## CPC - G04B 27/001: {Internal gear therefor, e.g. for setting the second hand or for setting several clockworks} - G04C 9/00: Electrically-actuated devices for setting the time-indicating means (of secondary clocks G04C13/03) - G04B: MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS (spring- or weight-driven mechanisms in general F03G; electromechanical clocks or watches G04C; electromechanical clocks with attached or built-in means operating any device at pre-selected times or after predetermined time intervals G04C23/00; clocks or watches with stop devices G04F7/08) - G04C: ELECTROMECHANICAL CLOCKS OR WATCHES ## Abstract A timepiece has a second hand, a minute hand and an hour hand which are rotationally driven by a gear train under control of an electromechanical transducer. The transducer has a plastic coil frame on which is wound a coil and electric drive signals are applied to the coil in response to which the transducer produces a rotational output for driving the gear train. A hand stopping device is formed integrally with the coil frame and functions to temporarily stop the rotational movement of the gear train to thereby enable setting or correction of the position of the second hand. The device comprises a flexible arm formed integrally with and projecting from the coil frame, the arm having a manually operated portion in the form of a button which, when actuated, resiliently flexes the arm from an inoperative position to an operative position, and an interlocking portion operable when the arm is flexed to its inoperative position to releaseably interlock with a gear of the gear train to thereby stop the rotational movement of the gear train. ## Claims ### Claim 1 A hand stopping device for a timepiece having a second hand, a minute hand and an hour hand driven by a gear train which is driven by an electromechanical transducer, the improvement comprising: said transducer having a coil frame composed of plastic material, said coil frame having an integral winding portion on which a coil is wound, and an integral arm which has an integral manually operable portion and an integral interlocking portion, the arm being configured such that when said manually operable portion is operated, the arm moves from an inoperative position in which said interlocking portion is out of engagement with said gear train to an operative position in which said interlocking portion engages with one gear of said gear train so as to stop the motion of said gear train. ### Claim 2 (depends on 1) A device in accordance with claim 1; including means mounting said manually operable portion for displacement axially of said one gear so that said one gear is axially depressed as said manually operable portion is displaced. ### Claim 3 (depends on 2) A device in accordance with claim 2; wherein said manually operable portion is configured such that it may be displaced in a direction substantially crossing at a right angle with an axial direction of said one gear thereby causing said interlocking portion to be displaced in a direction substantially crossing at a right angle with said axial direction to engage with said one gear. ### Claim 4 (depends on 3) A device in accordance with claim 3; wherein said coil frame has an integral second arm, said second arm being disposed so as to be displaced in the same direction as that of said manually operable portion, and means coacting with said second arm for applying a clicking action thereto. ### Claim 5 In a timepiece having an electromechanical transducer which has a coil wound on a coil frame for rotationally driving a gear train to thereby rotationally drive a second hand, a minute hand and an hour hand: a hand stopping device for temporarily stopping the rotational movement of the gear train to thereby temporarily stop the movement of the second hand, the device comprising an elongate flexible arm formed integrally with and projecting from said coil frame, the flexible arm having a manually operable portion effective when actuated to resiliently flex said arm from an inoperative position to an operative position, and an interlocking portion operable when said arm is flexed to its operative position to releasably interlock with a gear of said gear train to thereby stop the rotational movement of said gear train. ### Claim 6 (depends on 5) A timepiece according to claim 5; wherein said manually operable portion and said interlocking portion are formed integrally with said flexible arm. ### Claim 7 (depends on 5) A timepiece according to claim 5; wherein said coil frame and said flexible arm comprise a one-piece unitary structure. ### Claim 8 (depends on 5) A timepiece according to claim 5; wherein said coil frame, flexible arm, manually operable portion and interlocking portion jointly comprise a one-piece unitary structure. ### Claim 9 (depends on 8) A timepiece according to claim 8; wherein the one-piece unitary structure is comprised of plastic. ### Claim 10 (depends on 5) A timepiece according to claim 5; wherein said interlocking portion has a friction face for making frictional engagement with said gear to thereby stop the rotational movement of said gear train. ### Claim 11 (depends on 5) A timepiece according to claim 5; wherein said interlocking portion comprises a projection for engaging with projections on said gear to thereby stop the rotational movement of said gear train.