GB Patent: GB-396,140
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Improvements relating to percussive hand tools
"Rawlplug" mechanical hammer
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Patentee:
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| John Joseph Rawlings (exact or similar names) - London, England |
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Patent Dates:
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| Applied: |
Feb. 27, 1932 |
| Granted: |
Aug. 03, 1933 |
Espacenet patent
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Jeff Joslin
"Hand Tool Rescue" video: restoring a Rawlplugs hammer drill
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Description: |
| "This invention relates to an improved percussive hand tool chiefly intended for use in boring or drilling holes in masonry, brickwork, and the like..." This hammer drill is powered by turning the crank handle. |
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