sessions westminster pendulum length

[mrxmttr]

I am working on a Sessions Westminster that I believe is a 416 W.C. or a Westminster chime C.  The clock was missing the pendulum and weight so I am wondering if anyone could help with pendulum length. Any input would be greatly appreciated. 

[wls1971]

This is a two train Westminster chime ? the pendulum rod will hang to the very bottom of the movement plates which places the pendulum bob just below the movement , the suspension spring and rod would be 5 1/8 inches.

Photos would help.

https://mb.nawcc.org/images/attach/taming_the_sessions_2-train_4th_edition.pdf

Edited July 21, 2019 by wls1971

[oldhippy]

wis1971. Thats a good pdf you have found. I couldn't find anything to help out with. 

[watchweasol]

Hi   I second that Old Hippy.  Well done wls1971, as an avid trawler of the net and member of a few forums there is always some on who can find data and help

[wls1971]

I have two, two train Westminster clocks one German which I believe to be made by Peerless (Mathias Bauerle) for which I was able to find with help on another forum the original patent information  and a English Gillett and Johnstone, both these clocks use remarkably similar differential gears for controlling chime and strike on the hour, whilst doing research on those I found the Sessions clock information , I do not envy mrxmttr his work on this clock, all information states they are a absolute nightmare to work on 

Edited July 22, 2019 by wls1971

[mrxmttr]

Thanks you all for the help. And yes this clock is a little more difficult than many others but it is reassembled and running. just not keeping accurate time yet. I hope to make that happen with the help provided by this forum. Thanks again. 

[mrxmttr]

I should also add that the pdf posted by wls1971 is amazing. Thank you

[mrxmttr]

So, the problem turned out to be the mainspring great wheel. It had worn some of the teeth and would stop after running for awhile. Decided to try reversing the gear. So I cut it off of the pinion and pushed the click spring catch through to the other side of the wheel. Had a few Issues with lathe collets (another thread posted asking about American Lathe co. collets). I was able to make a new rivet and am about to reassemble. 

Thanks again everyone for the help and advice.