# US 2014/0192627 A1 · Timepiece movement with a balance and hairspring > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192627 A1 - Document ID: US20140192627A1 - Status: Published application - Kind: A1 - Application number: 14/238,536 - Filed: 2012-09-04 - Published: 2014-07-10 - Earliest claimed: 2011-09-07 - Assignees: Patek Philippe SA Geneve - Inventors: Jean-Luc Bucaille - Web page: https://patentgrep.com/patent/US20140192627A1 ## CPC - G04B 17/06: Oscillators with hairsprings, e.g. balance {(electrically driven balances G04C3/04; contacts actuated by a balance G04C13/065)} - G04B 17/066: {Manufacture of the spiral spring (locking of the spiral spring by the regulating lever G04B18/026; spiral spring with temperature compensation G04B17/227; fixation of the spiral spring on the collet G04B17/32; mainspring G04B1/14)} - G04B 17/26: for the effect of variations of the impulses - 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 A timepiece movement includes a balance-and-hairspring regulator and an escapement co-operating with the regulator, the outer turn (5) of the hairspring including a stiffened portion (6′; 6″; 6″′) arranged to make the development of the hairspring more concentric, is characterised in that the stiffened portion (6′; 6″; 6″′) is also arranged to at least partially compensate for the variation in the rate of the movement in dependence upon the oscillation amplitude of the balance caused by the escapement. ## Claims ### Claim 1 Timepiece movement comprising a balance-and-hairspring regulator and an escapement co-operating with the regulator, the outer turn (5) of the hairspring comprising a stiffened portion (6′; 6′; 6″′) arranged to make the development of the hairspring more concentric, characterised in that the stiffened portion (6′; 6″; 6″′) is also arranged to at least partially compensate for the variation in the rate of the movement in dependence upon the oscillation amplitude of the balance caused by the escapement. ### Claim 2 (depends on 1) Timepiece movement as claimed in claim 1, characterised in that the stiffened portion (6′; 6″; 6″′) is arranged to produce a rate gain of at least 2 s/d at an amplitude of 150° with respect to an amplitude of 300°, at least partially compensating for said rate variation caused by the escapement. ### Claim 3 (depends on 2) Timepiece movement as claimed in claim 2, characterised in that the stiffened portion (6′; 6″; 6″′) is arranged to produce a rate gain of at least 4 s/d at an amplitude of 150° with respect to an amplitude of 300°, at least partially compensating for said rate variation caused by the escapement. ### Claim 4 (depends on 3) Timepiece movement as claimed in claim 3, characterised in that the stiffened portion (6′; 6″; 6″′) is arranged to produce a rate gain of at least 6 s/d at an amplitude of 150° with respect to an amplitude of 300°, at least partially compensating for said rate variation caused by the escapement. ### Claim 5 (depends on 4) Timepiece movement as claimed in claim 4, characterised in that the stiffened portion (6′; 6″; 6″′) is arranged to produce a rate gain of at least 8 s/d at an amplitude of 150° with respect to an amplitude of 300°, at least partially compensating for said rate variation caused by the escapement. ### Claim 6 (depends on 1) Timepiece movement as claimed in claim 1, characterised in that the stiffened portion (6′) is closer to the outer end (4) of the hairspring than a theoretical stiffened portion (6) which would make the development of the hairspring substantially perfectly concentric. ### Claim 7 (depends on 1) Timepiece movement as claimed in claim 1, characterised in that the stiffened portion (6″) is thinner than a theoretical stiffened portion (6) which would make the development of the hairspring substantially perfectly concentric. ### Claim 8 (depends on 1) Timepiece movement as claimed in claim 1, characterised in that the stiffened portion (6″′) is less extended than a theoretical stiffened portion (6) which would make the development of the hairspring substantially perfectly concentric. ### Claim 9 (depends on 6) Timepiece movement as claimed in claim 6, characterised in that the thickness (e) and extent (θ) of the stiffened portion (6′) are substantially identical to those of said theoretical stiffened portion (6). ### Claim 10 (depends on 7) Timepiece movement as claimed in claim 7, characterised in that the position (α) and extent (θ) of the stiffened portion (6″) are substantially identical to those of said theoretical stiffened portion (6). ### Claim 11 (depends on 8) Timepiece movement as claimed in claim 8, characterised in that the position (μ) and thickness (e) of the stiffened portion (6″′) are substantially identical to those of said theoretical stiffened portion (6). ### Claim 12 (depends on 2) Timepiece movement as claimed in claim 2, characterised in that the stiffened portion (6′) is closer to the outer end (4) of the hairspring than a theoretical stiffened portion (6) which would make the development of the hairspring substantially perfectly concentric. ### Claim 13 (depends on 3) Timepiece movement as claimed in claim 3, characterised in that the stiffened portion (6′) is closer to the outer end (4) of the hairspring than a theoretical stiffened portion (6) which would make the development of the hairspring substantially perfectly concentric. ### Claim 14 (depends on 4) Timepiece movement as claimed in claim 4, characterised in that the stiffened portion (6′) is closer to the outer end (4) of the hairspring than a theoretical stiffened portion (6) which would make the development of the hairspring substantially perfectly concentric. ### Claim 15 (depends on 5) Timepiece movement as claimed in claim 5, characterised in that the stiffened portion (6′) is closer to the outer end (4) of the hairspring than a theoretical stiffened portion (6) which would make the development of the hairspring substantially perfectly concentric.