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GB Patent: GB-190,901,575
Improvements in machine tools
John Henderson Hamilton - Broadheath, Manchester, England

USPTO Classifications:

Tool Categories:
metalworking machines : milling machines
metalworking machines : drilling and boring : tapping machines
woodworking machines : wood drilling and boring : drill presses
metalworking machines : drilling and boring : drill presses

H. W. Kearns & Co., Ltd. - Broadheath, Manchester, England
Electromotors Ltd. - Manchester, England

H. W. Kearns & Co., Ltd. - Broadheath, Manchester, England


Patent Dates:
Applied: Jan. 22, 1909
Granted: Jan. 24, 1910

Patent Pictures:
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"Vintage Machinery" entry for H. W. Kearns & Co., Ltd.
"A machine for drilling and tapping holes from the inside of frames &c. as for the faces of magnets of electromotors, has a fixed frame A. on which slides a shell B vertically adjustable by gearing C1, C2, C5, C6, C7, C9. The shell B carries a turntable D and a stepped face-plate E, on which the work is mounted. The drill may be replaced by a milling-cutter. A plate B4, secured by bolts in slots and keys B7 so that it can be adjusted, carries the turntable D, which is retained by plates B9 and is rotated by a tommy-bar and held in required angular positions by indexing-notches and a locating-lever. The tool head G and the frame G' slide radially in the fixed frame A, the tool being driven and fed by a suitable mechanism, as shown in Fig. 9, comprising a drill socket rotated by power from cone pulleys N, the usual sliding shaft O for speed reduction, a clutch P for direct drive, friction gear Q for low-speed tapping and quick reversing, a quick-return hand-feed R operating through a pinion R1, a rack R2, and a fine automatic feed through a worm S and gearing S1, which gearing may be lowered clear by the lever S'. An automatic feed knock-off T and a tool lubricant pump V are also fitted. The Provisional Specification states that the drill head and gear may be enclosed in a fluid-tight casing. Sockets.-The tool socket Ha may be adjusted in the bevel-gear H2 by means of a screw H6 as shown in Fig. 10."

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