Oscillating body, mechanical oscillating system for wrist watches having such an oscillating body and watch having such an oscillating system

• US 8,662,742 B2
• Filed: 08/04/2011
• Issued: 03/04/2014
• Est. Priority Date: 08/06/2010
• Status: Active Grant

• Current Assignee: Damasko GmbH
• Original Assignee: Damasko GmbH
• Inventors: Damasko, Petra
• Primary Examiner(s): Miska, Vit W
• Application Number:
  US13/198,153
• Publication Number:
  US 20120087214A1
• Time in Patent Office: 943 Days
• Field of Search: 368169-171
• US Class Current: 368/171
• CPC Class Codes: G04B 17/063 Balance construction balances with frequency adjustment screw G04B18/006; balances with temperature compensation G04B17/222; balancing devices G04B17/28
• CPC Class Codes: G04B 17/222 with balances construction of balances G04B17/063
• CPC Class Codes: G04B 17/227 composition and manufacture of the material used composition and manufacture of hairsprings G04B17/066; of springs G04B1/145; anti-magnetic alloys G04B43/007; ferrous alloys C22C; non-ferrous alloys C22C, B22F
• CPC Class Codes: G04B 18/006 by adjusting the devices fixed on the balance construction of the pendulum G04B17/063; balancing G04B17/28

Abstract

Oscillating body for mechanical oscillating systems of wristwatches, having several mass weights arranged at regular angle distances around an oscillating body middle axis that respectively can rotate or swivel on the oscillating body on an axis parallel to the oscillating body axis and have a mass center of gravity that is radially offset to their axis.

Claims

1. An oscillating body for a mechanical oscillating system of wristwatches, comprising:

a plurality of mass weights arranged at even angle distances around a middle axis of an oscillating body, each of the plurality of mass weights has a mass center of gravity that is radially offset from an axis and can rotate or swivel on the oscillating body parallel to the middle axis of the oscillating body, wherein each of the plurality of mass weights is held by a press fit with at least one projection in a bore hole of the oscillating body formed axially congruent with the axis (AM) of each of the plurality of mass weights, and wherein the at least one projection has a same diameter as a diameter of the bore hole and each of the plurality of mass weights is held on the oscillating body by a permanent deformation of a partial section of the at least one projection to form a deformed section, and wherein the oscillating body is made of a metal material which has a density greater than 10 kg/dm³.

2. The oscillating body according to claim 1, wherein each of the plurality of mass weights is held on the oscillating body by peening of the partial section of the at least one projection.

3. The oscillating body according to claim 1, wherein the oscillating body is made of a material which has a density greater than 10 kg/dm³, a Mohs hardness greater than 5 and a linear expansion coefficient smaller than 7×

10<sup>−

6</sup>.

4. The oscillating body according to claim 3, wherein the oscillating body is made of tungsten, molybdenum, hafnium, a tungsten/copper alloy, or a copper-beryllium alloy.

5. The oscillating body according to claim 1, wherein the plurality of mass weights are manufactured from gold, brass or stainless steel.

6. The oscillating body according to claim 1, wherein each of the plurality of mass weights are provided within the oscillating body and do not protrude, or at most protrude only minimally, over a top side and a bottom side of the oscillating body.

7. The oscillating body according to claim 1, wherein a maximum diameter of each of the plurality of mass weights is approximately 10% to 12% of a total diameter of the oscillating body.

8. The oscillating body according to claim 1, wherein the oscillating body is formed with an outer circular ring-shaped section comprising holding tabs protruding from an inner side of the outer circular rings-shaped section in a direction of the middle axis of the oscillating body and each of the plurality of mass weights are held on a holding tab by peening of the at least one projection.

9. The oscillating body according to claim 1, wherein each of the plurality of mass weights has a recess that encloses the axis of each of the plurality of mass weights on a partial circle, on an angle area between 90°

and 200°

.