GB Patent: GB-170,648
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| Improvements in Work Tables and Work Chucking Devices for Milling or for Like Machine Tools
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Patentees:
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| Alfred Herbert (exact or similar names) - Coventry, Warwickshire, England |
| Percy Venables Vernon (exact or similar names) - Coventry, Warwickshire, England |
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Patent Dates:
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| Applied: |
Jul. 22, 1920 |
| Granted: |
Oct. 24, 1921 |
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Patent Pictures:
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Espacenet patent
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Joel Havens
"Vintage Machinery" entry for Alfred Herbert Ltd.
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Description: |
| Abstract:
A circular table A, Fig. 2, fitted with two work-holders disposed at 180 , is mounted on the main table B<2> of a milling-machine and is rotated during the idle return thereof by ratchet mechanism A<30> driven through gearing from the shaft O, which is also mounted in the main table and is rotated by the engagement of a fixed roller D<4>, Fig. 1, with the helical groove D<3>. The table A<3> is locked during the cutting traverse by a spring-pressed bolt A<5>, the latter being disengaged prior to indexing, by rack-and pinion gearing, from the quadrant lever A<12>, which may be operated by hand, or automatically by an adjustable stop A<15> op the fixed bracket C<2>. The locking pressure on the pad A<16> which additionally clamps the rotary table in the indexed position is applied through an eccentric spindle A<18>, Fig. 4, by a spring-pressed rod A<19>, and is released by a hand lever A<32> or by the engagement of an adjustable collar A<22> with the bracket C<2>. Change-feed and reverse gears are provided for the main table B<2>. |
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