Manufacturers Index - Tawney Machine Co.
Tawney Machine Co.
Williamsport, PA, U.S.A.
Manufacturer Class:
Wood Working Machinery
This page contains information on patents issued to this manufacturer.
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1,071,970
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Sep. 02, 1913
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Circular cutterhead
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Frank Stutzman |
Williamsport, PA |
Seen on cutterhead marked Tawney Machine Co., and also seen in ad for Fischer Mfg. Co. in 1920 issue of The Wood-Worker. The 1920 Bulletin of the Pennsylvania Dept. of Labor and Industry lists just two approvals for "Safety cylinders and cylinder heads": The Stutzman Round Cylinder Heads from Mr. Frank Stutzman of Williamsport, Pa., and the Oliver Circular Safety Cylinder from Oliver Machinery Co.
A cutterhead has been seen, marked as follows: "Stutzman Pat. / Sept. 2, 1913. / Made by / Fischer Mfg. Co. / Williamsport, Pa." |
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4,174,916
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Nov. 20, 1979
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Forming Tool Construction
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Mitchell Kezran |
Cranston, Providence County, RI |
Abstract:
A forming tool generally having a dove-tail shaped machine connector provided with an integral outwardly extending front support which in cooperation with the front surface of the tool is adapted to receive a forming insert. The front support is provided with a slot for receipt of locking wedges as to lock the insert in position with respect to the tool. The front support is positioned below the working edge of the insert and the tool is further provided with means for positioning the insert laterally with respect to the slot.
Background Summary:
This invention relates to a forming tool such as may be utilized to shape metal parts as by cutting. One such common type of tool generally is referred to as a dove-tailed tool and includes an outwardly extending front cutting surface adapted to engage the work piece and a dove-tailed shaped wedge downwardly extending from a base thereof to engage a similarly shaped vertically orientated dove-tailed slot in a machine or other tool holder. Generally such dove-tailed tool is of integral one-piece construction and accordingly must be periodically sharpened as by removal of the tool from its holder which in turn necessitates repositioning thereof. Also, after a number of successive sharpening's the front face of the tool will no longer overhang base portions thereof and thereafter the entire tool must be discarded.
It would accordingly be desirable to be able to position a replaceable forming element, i.e. a cutting insert, with respect to such a tool so that when the cutting edge becomes dull, only the insert would have to be removed. This would eliminate removal of the entire tool from the holding device and would further eliminate the necessity of eventually discarding the entire tool when worn. The use of an insert in conjunction with a forming tool would further permit the cooperative use of a shim or shims such that it or they would absorb a portion of the shock transmitted to the tool via its contact with the work piece.
It is accordingly a primary object of the present invention to provide a forming tool of novel construction which permits the use of a tool insert at the front working face thereof in such a manner that the means by which such insert is held in place does not interfere with the working of the tool.
A further object of the present invention is the provision of a tool of the aforementioned type in which positive positioning means are included such that the insert may contact three separate surfaces so as to positively spacially position such with respect to the remaining portions of the tool.
These and other objects of the invention are accomplished by the provision of an integral front support outwardly extending from the front working face of such a tool, which support includes a transversely extending slot, in turn adapted to receive wedge means wherein the insert is held against the front tool face. Furthermore, means for positioning the insert laterally within the slot is also provided.
Claim:
A dove-tailed forming tool adapted for receipt in a dove-tailed holder of a machine for plunge forming of a workpiece comprising, a block including front, top and bottom faces, said block having an integral dove-tail extending along the bottom face thereof for releasable engagement in a dove-tailed slot of a holder, said block including a generally vertically oriented front face and an integral front support overlying said dove-tail and extending forwardly of said front face, a laterally extending open top slot having a base wall formed in the upper surface of said support and disposed rearwardly of the forward extent of said support so as to dispose said base wall adjacent said front face and an upstanding slot wall adjacent said base wall and disposed in opposed relation to said front face, a forming insert having a top working surface, a bottom surface, and rear and front surfaces, said insert disposed in said slot with said insert bottom surface supported by said slot base wall and said insert rear surface disposed against said block front face, at least one insert wedge disposed in said slot and adapted to mutually contact said upstanding slot wall and the face surface of said insert so as to securely clamp said insert to said block and positioning means for fixing the position of said insert within said slot with respect to said block. |
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