Timepiece balance spring stud-holder with screws

Patent metadata

Field	Value
Publication number	US-9304494-B2
Application number	US-201414519320-A
Country	US
Kind code	B2
Filing date	Oct 21, 2014
Priority date	Nov 20, 2013
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

An assembly to hold a balance spring includes a balance spring stud, and a stud-holder. The stud-holder includes a housing to receive the stud, a mechanism to secure the stud including a screw orthogonal to the stud, and a mechanism to secure the stud-holder to an escapement mechanism. The stud includes a surface to orient a balance spring. The screw partially passes through the stud to hold the stud in an indexed position. The stud includes an internal thread cooperating with the screw and forming the orientation surface. The stud-holder includes a bore for the passage of the screw, a bearing face arranged at the entry of said bore, on the opposite side to the housing, for the abutment of a head of the screw.

First claim

What is claimed is:

1. An assembly to hold or support a timepiece balance spring, the assembly including a balance spring stud and a stud-holder, the stud-holder comprising:
a first housing to receive said balance spring stud;
at least one screw to secure said balance spring stud, a longitudinal axis of the at least one screw being orthogonal to a longitudinal axis of said stud; and
a securing mechanism to secure said stud-holder to an escapement mechanism, said balance spring stud including at least one orientation surface defining a direction of holding or supporting said balance spring,
wherein said at least one screw at least partially passes through said balance spring stud to hold the stud in an indexed locking position,
wherein said stud includes at least one internal thread cooperating with said at least one screw, said internal thread forming said orientation surface, and said stud-holder includes:
a first bore for the passage of each said at least one screw; and
a first bearing face abutted by a screw head comprised in said at least one screw, said bearing face being disposed at an entry of said first bore, on an opposite side to said first housing for said stud.

2. A timepiece escapement mechanism including at least one assembly according to claim 1 .

3. A timepiece movement including at least one escapement mechanism according to claim 2 .

4. A timepiece including at least one movement according to claim 3 , wherein the timepiece is a watch.

5. The assembly according to claim 1 , wherein said stud is pulled toward said stud-holder by said at least one screw.

Assignees

• Eta Sa Mft Horlogere Suisse

Inventors

• Courvoisier Raphael
• Ruefenacht Christian

Classifications

• G04B15/14

  Component parts or constructional details, e.g. construction of the lever or the escape wheel {(assembly and manufacture of the spring G04B1/145; assembly and manufacture of components, e.g. pinions, spindles G04B13/02; lubrication of clockwork bearings G04B31/008; oils for clockwork bearings in general G04B31/08)} · CPC title

• G04B17/325 Primary

  for fastening the hairspring in a fixed position, e.g. using a block · CPC title

• G04B17/34 Primary

  for fastening the hairspring onto the balance · CPC title

• G04B17/32

  Component parts or constructional details, e.g. collet, stud {, virole or piton} · CPC title