Balance spring stud-holder with simplied assembly
AssigneeETA SA Manufacture Horlogere Suisse
InventorsJulien Christan, Patrick Moller
Life of this patent
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Abstract
An assembly for holding or supporting a timepiece balance spring, includes a balance spring stud and a stud-holder, the stud-holder includes a base having at least one circular portion, the base including, on the circular portion, a first lug and a second lug each extending radially. One of the two lugs includes an elastic arm extending from the lug, in a direction parallel to that of the base, towards the other lug, the elastic arm forming with the base a housing for housing the balance spring stud therein and the first and second lugs are able to cooperate with a tool to allow the balance spring stud to exert a stress on the elastic arm to deform the latter and permit the assembly or disassembly of the stud.
Claims6
A method for assembly of a balance spring stud on a stud-holder, said stud-holder comprising a base having at least one circular portion attached to a balance-cock, said base comprising, on said circular portion, a first lug and a second lug each extending radially;
- the first lug comprising an elastic arm extending from the end thereof, in a direction parallel to that of the base, towards the second lug, said elastic arm forming with said base a housing for housing the balance spring stud, said method comprising:
- taking a first tool capable of performing a pinching action with two arms, and a second tool;
- placing the balance spring stud at the entrance to the housing while holding the balance spring stud via the first tool;
- and
- operating said second tool to lever and deform the elastic arm, allowing the housing to become wider to house said balance spring stud therein.
A method for disassembly of a balance spring stud from a stud-holder, said stud-holder comprising a base having at least one circular portion attached to a balance-cock, said base comprising, on said circular portion, a first lug and a second lug each extending radially;
- the first lug comprising an elastic arm extending from the end thereof, in a direction parallel to that of the base, towards the second lug, said elastic arm forming with said base a housing for housing the balance spring stud, said method comprising:
- taking a first tool capable of performing a pinching action with two arms, and a second tool;
- placing the balance spring stud at the entrance to the housing while holding the balance spring stud via the first tool;
- and
- operating said second tool to lever and deform the elastic arm, allowing the housing to become wider to remove said balance spring stud.
Dependencies are inferred from the claim text.