940's Hamilton regulator patent ?

Internet Horology Club 185

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January 17, 2010, 03:04

Gerald Zimmermann

940's Hamilton regulator patent ?

Has someome information about the patent regulator used in the early 18s full plate Hamiltons ?

It is the one with the round shaped retaining spring and the long index arm. (Goldwaith's patent ?)

I'am searching for information about the patent (name, date or number) !

Thanks
Gerald

January 17, 2010, 14:37

Gerald Zimmermann

Stop searching !

Goldthwait's patent regulator

US 427072

Gerald

January 17, 2010, 18:06

Lindell V. Riddle

That regulator was in constant use on all 18-size Hamiltons from the beginning in 1892 through the 1927 end of 18-size production.

Here it is on 552983 an uncommon Model 944 Hamilton...

January 17, 2010, 19:31

Tom Brown

Here is the patent for those interested.