US Patent: 684
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| Machine for mortising timber, &c.
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Patentees:
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| Francis Burdick (exact or similar names) - Brooklyn, NY |
| Thomas Burdick (exact or similar names) - Brooklyn, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Apr. 07, 1838 |
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Jeff Joslin
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Description: |
| From the Journal of the American Institute: "The general plan of this mortising machine is that of the larger number of similar instruments; the particular difference is in the manner of working the slides up and down, which carry the chisels. There are two slides, each of which carries a chisel, and these slides are carried up and down alternately by means of a pinion placed between racks on the inner edges of these slides, which are guided between vertical cheeks. A pendulous lever, or handle, hangs from the shaft of the pinion, and by swinging this backward and forward, the motion of the slides and chisels is obtained. A feed hand is also made to operate in notches on the sliding bed piece which supports the timber to be mortised. The claim is to 'the double rack, or slides, to which the chisels are attached, worked by one pinion in the manner described.' The granting of the patent is prima facie evidence that there is novelty in the thing claimed; we do not perceive, however, in what consists the superiority of this new arrangement of parts, over those of some former mortising machines." |
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