# US 8,540,420 B2 · Gong mounting device for striking watch > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,540,420 B2 - Document ID: US8540420B2 - Status: Granted - Kind: B2 - Application number: 12/722,907 - Filed: 2010-03-12 - Published: 2010-09-16 - Granted: 2013-09-24 - Earliest claimed: 2009-03-13 - Assignees: Bulgari Horlogerie SA - Applicants: Philippe Morata; Gérald Roden - Inventors: Philippe Morata; Gérald Roden - Web page: https://patentgrep.com/patent/US8540420B2 ## CPC - G04B 21/12: Reiterating watches or clocks - G04B 37/0075: {with means to enhance sound transmission (sonorous means for chimes G04B21/08; for alarm clocks G04B23/028; clockworks combined with musical devices G04B47/025)} - G04B 39/00: Watch crystals; Fastening or sealing of crystals; Clock glasses - 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) ## Abstract Gong mounting device designed to bear against a crystal (10) closing a striking-watch case. This device comprises a block (20) for immobilizing at least one end (1, 2) of a gong (T1, T2) inside the watch case, and a means (30) for mounting this block (20) on said crystal (10). The mounting means (30) is a clamping-type mounting means enabling the block (20) to exert pressure on the crystal (10). ## Claims ### Claim 1 Gong mounting device designed to bear against a crystal closing a striking-watch case, comprising a block for immobilizing at least one end of a gong inside the watch case, and a means for mounting this block on said crystal, wherein the crystal comprises at least one opening and said mounting means is a clamping-type mounting means cooperating with said at least one opening and enabling the block to exert pressure on the crystal. ### Claim 2 (depends on 1) Mounting device according to claim 1, wherein said clamping-type mounting means comprises a means for adjusting the clamping force applied between the block and the crystal. ### Claim 3 (depends on 2) Mounting device according to claim 2, wherein the applied clamping force is produced by tightening a threaded member, or by rotating an eccentric, or by turning a lever arm. ### Claim 4 (depends on 2) Mounting device according to claim 2, wherein the clamping-type mounting means comprises at least one first threaded member, which has a head facing the outer face of the crystal and which is designed to engage with a threaded portion housed in the block. ### Claim 5 (depends on 4) Mounting device according to claim 4, wherein a first seal is arranged at an interface between the crystal and the head of the first threaded member. ### Claim 6 (depends on 4) Mounting device according to claim 4, wherein the head bears against the crystal via a collar which increases the contact area on the outer face of the crystal in order to reduce the pressure exerted on the crystal. ### Claim 7 (depends on 6) Mounting device according to claim 6, wherein a second seal is arranged at an interface between the crystal and the collar and in that the first seal is positioned at an interface between the collar and the head. ### Claim 8 (depends on 6) Mounting device according to claim 6, wherein the head of the first threaded member has no recess. ### Claim 9 (depends on 4) Mounting device according to claim 4, wherein the head of the first threaded member has no recess. ### Claim 10 (depends on 1) Mounting device according to claim 1, wherein the applied clamping force is produced by tightening a threaded member, or by rotating an eccentric, or by turning a lever arm. ### Claim 11 (depends on 1) Mounting device according to claim 1, wherein the clamping-type mounting means comprises at least one first threaded member, which has a head facing the outer face of the crystal and which is designed to engage with a threaded portion housed in the block. ### Claim 12 (depends on 11) Mounting device according to claim 11, wherein a first seal is arranged at an interface between the crystal and the head of the first threaded member. ### Claim 13 (depends on 11) Mounting device according to claim 11, wherein the head bears against the crystal via a collar which increases the contact area on the outer face of the crystal in order to reduce the pressure exerted on the crystal. ### Claim 14 (depends on 13) Mounting device according to claim 13, wherein a second seal is arranged at an interface between the crystal and the collar and a first seal is positioned at an interface between the collar and the head. ### Claim 15 (depends on 11) Mounting device according to claim 11, wherein the head of the first threaded member has no recess. ### Claim 16 (depends on 11) Mounting device according to claim 11, wherein the first threaded member comprises a blind internal thread and a smooth outer surface. ### Claim 17 (depends on 11) Mounting device according to claim 11, wherein the first threaded member has an external thread. ### Claim 18 (depends on 1) Mounting device according to claim 1, which comprises a means for positioning the block on the crystal. ### Claim 19 (depends on 18) Mounting device according to claim 18, wherein said positioning means consists of the engagement of the outer surface of a first threaded member in a bore formed in the block. ### Claim 20 (depends on 1) Mounting device according to claim 1, wherein the opening is a circular opening. ### Claim 21 (depends on 1) Mounting device according to claim 1, wherein the opening is a circular opening and the mounting means comprises a first threaded member, wherein the circular opening has a diameter greater than a diameter of the first threaded member in order to provide a clearance useful for positioning the block on the crystal.