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Title: |
1893 Article-Tangyes' Machine Tool Co., Ltd., 10 inch Centre (20 inch swing) Engine Lathe |
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Source: |
Engineering Magazine, V55, 24 Feb 1893, pg 221 |
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Insert Date: |
6/23/2012 7:46:31 PM |
The accompanying illustrations represent the 10-in. size of the new series of lathes now being made by Messrs. Tangyes' Machine Tool Company, Birmingham. These machines are made from new patterns, 9-in., 10-in., 12 in. and 14-in. centres, and differ from the list design in the following particulars:
The fast headstock, of which a section is given, has the usual reversing motion placed inside the casting instead of outside, allowing the feed cone for driving the back-shaft to be on the reversing spindle at the same time as the first change wheel; this enables the lathe to be changed from screw-cutting to sliding or surfacing without the man leaving the saddle, unless to change speeds or reverse the feeds.
The feed cones are interchangeable, and give four feeds from 1/52 in. to 1/13 in. per revolution of lathe spindle, while if other feeds be required the change wheels may be used.
Another feature is the clutch motion for quick thread screws; by pushing in the knob at the end of the spindle the feed gear is connected with the lathe cone pulley, instead of with the lathe spindle, giving in double gear a speed of exactly nine times that of the lithe spindle. By this motion the lathe will cut quick pitch screws, without the usual heavy gearing up and straining of the reversing wheels; screws 4½ in. pitch can be cut with equal wheels on the reversing spindle and guide screw, while if the clutch be in gear with the lathe spindle, instead of the lathe cone pulley, the same wheels will only cut 4-in. pitch screws. This motion, of course, governs the back-shaft as well, giving four extra speeds.
The lathe beds are 1¼ to 1 1/3 times their previous width, giving much greater support to the saddle under heavy cuts, gap-work, &c. The saddle and loose head are of the firm's usual pattern. The lathe shown weighs complete about 56 cwt. |
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1893 Tangyes' Machine Tool Co., Ltd., 10 inch Centre (20 inch swing) Engine Lathe
1893 Tangyes' Machine Tool Co., Ltd., Headstock (section)
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