# US 11,442,408 B1 · Double escapement mechanism for a watch or clock

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- Number: US 11,442,408 B1
- Document ID: US11442408B1
- Status: Granted
- Kind: B1
- Application number: 17/707,022
- Filed: 2022-03-29
- Granted: 2022-09-13
- Earliest claimed: 2022-03-29
- Applicants: Donald Loke; Corey Loke
- Inventors: Donald Loke; Corey Loke
- Web page: https://patentgrep.com/patent/US11442408B1

## CPC

- G04B 15/08: Lever escapements
- G04B 15/14: 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)}
- 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 double escapement mechanism for a watch, clock, or other timepiece. The mechanism comprises first and second escape wheels; a first geared drive wheel having a plurality of teeth for rotating the first escape wheel and a second geared drive wheel having a plurality of teeth for rotating the second escape wheel, the first and second geared drive wheels positioned below and concentric with the first and second escape wheels; a balance wheel positioned above the first and second escape wheels and mounted for rotational movement; a hairspring concentric with the balance wheel and positioned below the first and second geared drive wheels; a roller table having first and second impulse jewels positioned thereon and a roller jewel positioned therebetween; first and second arcuate levers for locking and unlocking the adjacent escape wheel and adjacent to the first and second escape wheels, each arcuate lever having a jewel positioned thereon for locking and unlocking the adjacent escape wheel; a passing spring having a blade positioned between the first and second arcuate levers and extending to the roller table, such that the roller table jewel can deflect the passing spring toward the first arcuate lever to unlock the first escape wheel and can deflect the passing spring toward the second arcuate lever to unlock the second escape wheel.

## Claims

### Claim 1

A double escapement mechanism for a watch, clock, or other timepiece, comprising:
first and second escape wheels;
a first geared drive wheel having a plurality of teeth for rotating the first escape wheel and a second geared drive wheel having a plurality of teeth for rotating the second escape wheel, the first and second geared drive wheels positioned below and concentric with the first and second escape wheels;
a balance wheel positioned above the first and second escape wheels and mounted for rotational movement;
a hairspring concentric with the balance wheel and positioned below the first and second geared drive wheels;
a roller table having first and second impulse jewels positioned thereon and a roller jewel positioned therebetween;
first and second arcuate levers for locking and unlocking the adjacent escape wheel and adjacent to the first and second escape wheels, each arcuate lever having a jewel positioned thereon for locking and unlocking the adjacent escape wheel;
a passing spring having a blade positioned between the first and second arcuate levers and extending to the roller table, such that the roller table jewel can deflect the passing spring toward the first arcuate lever to unlock the first escape wheel and can deflect the passing spring toward the second arcuate lever to unlock the second escape wheel.

### Claim 2 (depends on 1)

The double escapement mechanism of claim 1 additionally comprising spring means for holding the first and second arcuate levers in a predetermined position adjacent the first and second escape wheels.

### Claim 3 (depends on 1)

The double escapement mechanism of claim 1, wherein the roller table is concentric with the balance wheel and the hairspring and is positioned for rotational movement between the balance wheel and the hairspring.

### Claim 4 (depends on 1)

The double escapement mechanism as set forth in claim 1, wherein each escape wheel has a plurality of spaced apart teeth.

### Claim 5 (depends on 1)

The double escapement mechanism as set forth in claim 1, wherein the passing spring includes a longitudinally extending flexible steel blade having a thickness of about 0.1 millimeter.

### Claim 6 (depends on 1)

The double escapement mechanism as set forth in claim 1, wherein the first escape wheel rotates in a clockwise direction and the second escape wheel rotates in a counterclockwise direction.