By continuing to use this site, you agree to our use of cookies. Find out more

Member postings for Anders Eriksson

Here is a list of all the postings Anders Eriksson has made in our forums. Click on a thread name to jump to the thread.

Thread: Harrisons gearing and friction.
24/01/2011 20:43:03
David, Just to make sure that my explanation is understood. The shoulders are perfectly square. However, after refreshing the memory I remember (and can see) that the ends of the pivots are conical and the marks where the rollers made contact and minor wear are not close to the shoulder.
Since it irritated me that I could not remember exactly how it is done I looked thru the book "Time restored" by Jonathan Betts. On page 92 there is a picture of H2 and there you can see that there is a small bridge that serves to hold the bearings for the rollers and also will keep the arbour in place. So for H2 at least it is clear. The roller wheels roll on cylindrical pivots and the pointed cone at the end of the pivot will keep the arbour in place lengthwise.
A final comment that is certainly known by David and Stuart but maybe not by all is that the arbours and pivots were made of brass.
Anders
23/01/2011 21:14:02
David,
If your question is "what form do the pivots have in Harrisons clocks?" then the answer for H2 which uses anti friction wheels for most arbours is that they are straight cylindrical pivots like any clock. I had the opportunity to see H2 disassembled at the Greenwich museum last year and was a bit surprised at this. I guess that the shoulder prevents the arbour to move out of position and the pivots look a bit longer than a "normal" clock. I am not a Harrison expert but hope that this will help a little. I recommend a visit to the observatory in Greenwich to study the displayed clocks where this should be visible
Regards Anders.
Thread: Miniature welding
10/01/2011 21:00:11
There are TIG-type microwelders made for the jewelry industry. They are also used in horology. I believe they could definitely do the job if the parts are not to heat demanding.
They are not as expensive as the laser welding machines but may cost about 3000£.
One link to the manufacturer http://www.lampert.info/web/en and one link to a clockmaker using the technique.
http://www.geoffreywalkerclocks.co.uk/microwelding/microwelding.shtml
I have tried it and butt welding two pieces about 1x1 cm of stainless steel was easy holding the pieces.
Anders
Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Sign up to our Newsletter

Sign up to our newsletter and get a free digital issue.

You can unsubscribe at anytime. View our privacy policy at www.mortons.co.uk/privacy

Latest Forum Posts
Support Our Partners
cowells
Sarik
MERIDIENNE EXHIBITIONS LTD
Shopping Partners
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest

 

Donate

donate