Pendulum

Clockm

NAWCC Member
Feb 28, 2021
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Do you know where I can get some info on how to adjust an Invar pendulum for an IBM Master clock, model 25MC. I need to adjust it so it runs faster.
 

Toughtool

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Aug 12, 2016
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Look at pages 6 and 7 of this rehash of the ITR Service instructions, number 222, from IBM
You may or may not have both adjusting nuts.
 
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