US Patent: 2,063,129
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| Drawbolt Tool Holder and Bit
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Patentee:
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| Ole Severson (exact or similar names) - Shelton, Fairfield County, CT |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jul. 31, 1934 |
| Granted: |
Dec. 08, 1936 |
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Joel Havens
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Description: |
| Abstract:
The invention relates to improvements in tool bits and tool holders, therefor, of the draw-bolt type and particularly designed for use in connection with metal working apparatuses, such as, boring mills, lathes, planers and the like. It is among the general objects of the invention to provide a new and efficient bit and holder assembly, which will give increased rigidity to the structure, holding a cutting tool in contact with the surface to be worked. Another object of the invention is to provide the structure with an interrelationship of parts and which is designed to reproduce, to a minimum, the possibility of movement between the bit and holder so as to avoid any chattering and consequent vibration in the work form thereby. Another important object is to provide the adjustability in the relation of the bit with the holder, the same being accessible without loss of rigidity.
Claim:
A lathe tool holder and bit assembly including a longitudinally extending tool holder body having a furcation at the forward end thereof which forms a pair of facing surfaces and end wall surfaces; one of the facing surfaces being parallel with the longitudinal axis of the body and the other facing surface being inclined with respect thereto, and the end wall being disposed at an inclination to a plane extending through 6 the body at right angles to the axis thereof; a tool bit having a shank received within said fur-cation, the shank having parallel walls, one contacting with the inclined surface, and a bit retainer having a shank and an upstanding head, the head having walls disposed at an angle equal to the angle of divergence between the facing surfaces of the furcation, one of its surfaces contacting with the surface parallel to the axis of the body and the other surface engaging the shank in parallelism therewith to secure the shank between it and the other facing surface of the furcation; means engageable between said angularly disposed facing surface and the shank to lock the shank against longitudinal movement from the furcation; the parallel surface of the furcation being cut away to receive and fit the shank of the retainer thus to provide intergrading means between the shank and the retainer for restraining the retainer against transverse movement and intergrading means between the retainer and said bit surface parallel with the longitudinal axis of the body for maintaining rigid positioning of the bit shank, and means for moving the bit retainer longitudinally inwardly and outwardly within said furcation. |
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