GB Patent: GB-191,413,815
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| Improvements relating to boring, facing and like machines
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Patentee:
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| William Alfred Pearn (exact or similar names) - Manchester, England |
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Patent Dates:
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| Applied: |
Jun. 08, 1914 |
| Granted: |
Jan. 28, 1915 |
Espacenet patent
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Jeff Joslin
"Vintage Machinery" entry for Frank Pearn & Co., Ltd.
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Description: |
| "The rotary tool-heads of boring and facing machines, such as are described in Specification GB-191,219,159, have a special feed-motion. A worm on the central feed-spindle drives a worm-wheel e and, through a clutch, a spur-wheel g meshing with a pair of pinions h engaging a rack on the tool slide. When turning maximum diameters, only the outer pinion is operative. Tools of ordinary length may be employed, the shank passing clear of the worm-wheel." |
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