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US Patent: 912,507
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Percy George Tacchi - Acton, England

USPTO Classifications:

Tool Categories:
wrenches : wrench components : wrench handle components


F. M. Russell & Co. Ltd. - Willesden, London, England

J. M. Wynkoop
Fredk. L. Rand
H. D. Jameson

Patent Dates:
Applied: Oct. 12, 1906
Granted: Feb. 16, 1909

Patent Pictures:
Percy G. Tacchi patent February 16, 1909
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Adjustable open end head with two pivoting handle segments that have rack teeth. This arrangement allows the angle between the head and handle to be adjusted to allow additional movement of the head. A known example marked "GRYP - F. M. R. & Co." along with other information about British tool makers of the early 20th Century identifies the maker.

Compare Tacchi's earlier patents (pat. no. GB-190,401,868, 805,328 and GB-190520718).

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