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US Patent: 3,788,158
Trip Device for Use in a Feed Mechanism of a Machine
Arthur Jose Firth - Colchester, England

USPTO Classifications:
192/56.61, 74/405, 74/412R

Tool Categories:
metalworking machines : metalworking machine mechanisms

600 Machine Tools, Ltd. - London, England

Not known to have been produced

none listed

Patent Dates:
Applied: Feb. 22, 1972
Granted: Jan. 29, 1974

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In the quill feed mechanism of a milling machine, a trip device which disconnects the drive if the quill meets an unyielding obstruction, comprising a pivoted housing carrying a gear which forms part of the feed mechanism, an angled face clutch and a latch mechanism arranged so that when an abnormal torque is imposed on the said gear, the latch mechanism disengages so that the housing pivots to disconnect the feed drive.

U.S. Patent Documents

2,885,901 May 1959 Firth

229,993 July 1880 Flenniken

1,250,362 December 1917 Schellenbach

1,760,430 May 1930 Mirrielees

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