Sessions Store Regulator

In for repair is a Sessions regulator clock, time only.  The report from the customer was the clock does not run.  Just before it stopped running the minute hand would "flutter" for a few minutes i.e. run for about 20 minutes real fast.  Here is the picture of the clock as it arrived at the shop.

The Sessions company has a long history of American clock makers.  Follow this link for a brief history of the company. 

This image shows the manufacture's stamp.  I've circled a couple pivot holes that were worn and needed rebuilding.  6 pivot holes were rebuilt.  Follow this link for a short video showing pivot hole wear.  All the pivots were inspected and found a couple that were damaged.  These pivots were placed on the lathe using an emery stick and pivot polisher.  After this work the pivots were nice and smooth.

This is another picture of the escape wheel and pivot hole.  This one was badly worn.  The "fluttering" mentioned above comes from the wear in this pivot hole and the depthing of the verge.  Both were repaired.  Click this link for a short video of the pivot hole wear on the escape wheel.

This image shows the movement apart.  Notice the dirty oil around the bottom hole or mainspring hole.

The next image is of the two plates.  Very dirty!

Follow the red arrow.  Looking closely at the winding click spring and ingenious repairman used a safety pin as a clock spring to hold the click in place.  Although creative, not an industry standard repair.  This click was replaced with a standard click and click spring.

Taking a closer look at the click I noticed that it was worn.  Here is an image of the original click and the new click side by side.  Notice the grove in the original click,  It was a good idea to replace that click with or without the wonderful creative repair.

This same image with an arrow pointing to a loose connection of the pallet arm.  This was riveted back together for a tight fit.  This caused a significant power lose.

Here is a list of repairs made

1.  Tighten screws on door hinge

2.  Hour hand on upside down.  Installed correctly

3.  6 Pivot holes worn, rebuilt

4.  Replace winding click

5.Adjust pendulum rod loop.  Too tight causing power lose

6.  Adjust depthing of pallet relative to escape wheel

7.  Adjust verge arm.  Arm and pendulum rod touching

8.  Polish pivots

9.  Stretch mainspring and smooth with steel wool

10.  Ultrasonically clean mechanism with hi-grade clock cleaning solution

11.  Oil case & clean glass

12.  Adjust escapement so clock is "In beat" when case is level

13.  Regulate speed using regulation nut on bottom of pendulum

Here is the last image of the clock running ready to go home!