Pallets for the escapement of a clock movement

Patent metadata

Field	Value
Publication number	US-11073795-B2
Application number	US-201816164858-A
Country	US
Kind code	B2
Filing date	Oct 19, 2018
Priority date	Nov 22, 2017
Publication date	Jul 27, 2021
Grant date	Jul 27, 2021

Abstract

The invention relates to pallets for an escapement of a clock movement including a pallet-stone support, pallet-stones mounted on the pallet-stone support, a fork including first and second horns, a safety pin and a rod connecting the pallet-stone support to the fork and to the safety pin, the pallet-stone support, the rod, the safety pin and the fork forming a monolithic body of the pallets, the pallet-stone support, the rod and the safety pin being formed by a main layer of constant thickness, the first and second horns of the fork having a greater height than the constant thickness and being formed by the main layer, and also by an additional layer, the main layer and the additional layer forming the monolithic body of the pallets.

First claim

The invention claimed is:

1. Pallets for an escapement of a clock movement comprising:
a pallet-stone support;
pallet-stones mounted on the pallet-stone support;
a fork including first and second horns;
a safety pin; and
a rod connecting the pallet-stone support to the fork and to the safety pin,
wherein the pallet-stone support, the rod, the safety pin, and the fork form a monolithic body of the pallets, and
wherein the pallet-stone support, the rod and the safety pin are formed by a main layer of constant thickness, and in that the first and second horns of the fork have a greater height than the constant thickness and are formed by said main layer, and also by an additional layer, the main layer and the additional layer form the monolithic body of the pallets.

2. The pallets according to claim 1 , wherein the ratio between the height of the horns and the thickness of the main layer is between 1.5 and 10.

3. The pallets according to claim 1 , wherein the body is manufactured from a material selected from the group of materials comprising silicon, silicon nitride, silicon carbide, steel, gold or one of its alloys, nickel, nickel-phosphorus, brass, copper-beryllium, nickel-silver, polymers, ceramic and amorphous metal.

4. The pallets according to claim 1 , wherein the body is produced by a lithographic and electroforming process.

5. The pallets according to claim 4 , wherein the process is a process of the LIGA type with two levels.

6. The pallets according to claim 5 , wherein the additional layer is formed before the main layer.

7. An escapement of a clock movement comprising the pallets according to claim 1 .

8. A clock movement comprising the escapement according to claim 7 .

Assignees

• Nivarox Sa

Inventors

• Vaucher Frederic

Classifications

• G04B15/14 Primary

  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

• G04B15/08

  Lever escapements · CPC title