1900 Mainspring

John Sabato · 05-15-2008, 11:53 AM

Thanks Ron for a great photo essay on the early mainspring. From your photos it seems that the size of the "foot" on the longer spring also varies... does this foot play a role in keeping the lower end of the spring in place during operation? I imagine it does, and if I am correct, approximately what length would you consider optimum?

On my screen, it appears that the photo is approximately 1.5 to 1.6 times larger than life. Measuring the original spring's "pull" would seem to be a challenge...

Once last question. Appoximately what thickness of spring steel are we dealing with here? are both leaves the same material or is one thicker than the other?

05-15-2008, 11:53 AM	#2
John Sabato Lifer Lifetime Forum Patron Join Date: Jun 2002 Location: The Capital of the Free World Posts: 10,156 Thanks: 3,003 Thanked 2,309 Times in 1,098 Posts	Thanks Ron for a great photo essay on the early mainspring. From your photos it seems that the size of the "foot" on the longer spring also varies... does this foot play a role in keeping the lower end of the spring in place during operation? I imagine it does, and if I am correct, approximately what length would you consider optimum? On my screen, it appears that the photo is approximately 1.5 to 1.6 times larger than life. Measuring the original spring's "pull" would seem to be a challenge... Once last question. Appoximately what thickness of spring steel are we dealing with here? are both leaves the same material or is one thicker than the other? __________________ regards, -John S "...We hold these truths to be self-evident that ALL men are created EQUAL *and are endowed by their Creator* with certain UNALIENABLE* rights, and among these are life, LIBERTY, and the pursuit of happiness..."*

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