U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 545
/.M (^/?/M^?J&yt// CmA^A-T/isia^j,^ i CO. PHOTO-1. IT HO.. WASHINGTON. D C. No Model. 17 Sheets—Sheet 9. G. E. HUNTER. MECHANISM FOR TESTING WATCH BALANCES AND HAIR SPRINGS. No. 490,202. Patented Jan. 17, 1893. &hc/. /6\ %/X … CCOvn^ ijdwt. \&y& L XstCJ—r-aS- <£>. /ohm^h., ofrtmrwi 4. cWwxanA^ OL^MM(2uuuM. ^ am^^ Tut NUI1HI1 PCTttTi CO . PMOTCLITHO (No Model.) 17 Sheets—Sheet 10. G. E. HUNTER. MECHANISM FOR TESTING WATCH BALANCES AND HAIR SPRINGS. No. 490,202, Patented Jan. 17, 1893.
Clocks and watches
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