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Expired
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Gordon Paton Clark
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Individual
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Individual
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Publication of GB190525429ApublicationCriticalpatent/GB190525429A/en
Drilling And Exploitation, And Mining Machines And Methods
(AREA)
Abstract
25,429. Clark, G. P. Dec. 7. Tools and tool-holders.-A hand or machine tool, such as a chisel, gouge, &c., has a detachable bit, with or without a shoulder, the shank of which is provided with a cylindrical projection to fit in a holder having a centre hole and dividing slit as shown in Figs. 1 and 3. The portion of the shank near the cutting-part is slightly enlarged and conical. In a modification, shown in Figs. 3 and 4, the shank has a portion cut out, leaving a space G into which a plug E, previously forced into the centre hole, enters. The plug may be formed with the shank as shown in Fig. 5. The bits may be removed by a wedge driven in the portion of the slit below the shank.
GB190525429D1905-12-071905-12-07Improvements in Hand or Machine Tools for Working in Metals, Stone, Wood and the like.
ExpiredGB190525429A
(en)