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One of George Daniels´ central contributions to horology is his co-axial escapement. This book explains the action of the escapement in terms accessible to both expert and layman.

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One of George Daniels´ central contributions to horology is his co-axial escapement. Having observed that the dominant lever escapement begins to change its rate after a year or two - a disturbance caused by the sliding action of the impulse elements of the escapement - Daniels set about developing a mechanism that avoided this problem. The result of his efforts was the co-axial escapement, a mechanism in which he sought to combine the strengths and eliminate the deficiencies of existing watch escapements, the lever escapement foremost among them. First devised in 1977, today it remains largely the same as fitted in watches of Daniels´ own manufacture, as well as those of several wrist-watch manufacturers. This book explains the action of the escapement in terms accessible to both expert and layman, and is accompanied by a series of detailed line drawings.

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Foreword
Introduction

General Principles
Verge Escapement
Cylinder Escapement
Virgule Escapement
Duplex Escapement
Lever Escapement
Escaping Angle
Lever Angle
The Draw Angle
The Balance Roller
The Pallets and Escape Wheel
Detent Escapement
The Unlocking Angle
The Angle of Draw
The Locking Stone
Pivoted Detent
The Impulse Angle
Radial Impulse at Each Vibration
Robin Escapement
Echappement Naturel
Summary
Detached Escapements without lubricant
Independent Double Wheel Escapement
Double Radial Impulse with Single Wheel
Co-Axial Escapement
Extra Flat Co-Axial Escapement
Symmetrical Co-Axial Escapement
Photographic Plates

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Daniels, George
George Daniels (1926-2011) was a British horologist and watchmaker.

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