Workshops
Lesson Plans

WS116 Introduction to Servicing a Platform Escapement Lesson Plan

First Day

Introduction

• Introduction of the Instructor
• Overview of the content of the course

History

• Development of the “dead beat” escapement
• Adoption of the hairspring to the balance wheel
• Mudge and the development of the “lever” escapement

Break

Nomenclature

• The escape wheel

• Arbor
• Pivots
• Pinion

• The lever

• End stones
• Fork
• Guard pin
• Banking pins

• The balance assembly

• The balance wheel
• Monometallic
• Bi-metallic

• The staff

• Pivots
• Shoulders

• The hairspring

• Collet
• Stud

• The roller table

• Types of rollers
• The impulse jewel

• The balance cock

• Hole jewels
• Cap jewels
• Indexing pins
• The regulator

Lunch

How it works

• Five stages to the working of the escapement

• Impulse

• Impulse from the escape wheel

• Drop lock
• Drop
• Slide
• Total lock

Servicing the platform escapement

• Disassembly

Break

Servicing the platform escapement (con’t)

• Continuing the disassembly of the platform
• Inspection of the components

Second Day

            Servicing the platform escapement (con’t)

• Cleaning the disassembled platform

• Prep work
• The hairspring
• The jewels
• Methods of cleaning

Break

• Reassembling the platform

• Lubrication
• Adjustments

• Putting the escapement in beat
• Timing the escapement

Lunch

Trouble shooting the platform escapement

• Common problems and their causes
• Hairspring problems
• Identifying pivot problems
• Identifying jewel problems

Break

• Discussion of course contents

• Questions and answers

Summation