US Patent: 667,880
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| Metal-working machine
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Patentees:
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| Rufus Anderson (exact or similar names) - Hartford, CT |
| Howard N. Hinckley (exact or similar names) - Hartford, CT |
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Patent Dates:
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| Applied: |
Apr. 28, 1900 |
| Granted: |
Feb. 12, 1901 |
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Joel Havens
"Vintage Machinery" entry for Dwight Slate Machine Co.
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Description: |
| E. C. Whitney - patent attorney
This invention relates, generically, to a metal-working machine of that class embodying a chuck or work-holder and a rotative tool-holder or spindle disposed in operative relation with said chuck, and more particulaiiy to improved work centering and holding means for a machine of this class. In metal-working machines of-the class above referred to, in which a chuck is employed for holding the work to be operated upon by a rotating tool, no automatically-operative means have been provided, in so far as we are aware, for first accurately centering a piece of work of irregular contour with relation to the axis of the tool and for subsequently engaging and holding the piece of work in its accurately-centered position that is to say, no independent means have been provided in connection with each jaw of an automatic or universal chucking mechanism whereby the extent of closing movement of each jaw with respect to a center common to all jaws could be arbitrarily varied. One object of the present invention is to provide, in a metal-working machine of the class specified, improved work centering and holding means embodying a plural number of sets or pairs of jaws adapted for engaging a piece of work of irregular contour at different points in the length thereof and to so construct and organize the elementary features of said means that one pair of jaws have predetermined relative movements with respect to a common center and will operate to engage and accurately center the piece of work with respect to the axis of the tool which is to operate thereon, and the other set of jaws will subsequently grasp the piece of work at a different point in the length thereof and hold the same in its accurately-centered position. Another object of the invention is to furnish an improved metal-working machine including a spindle supported for rotative and reciprocatory movements, an independent chuck disposed in advance of said spindle and embodying work-grasping jaws, and means in connection with and operative on reciprocative movements of said spindle for automatically operating said jaws.
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