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US Patent: 5,517X
Double Plough
Patentees:
Philip Altenderfer (exact or similar names) - Cootstown, Berks County, PA
Benjamin Altenderfer (exact or similar names) - Cootstown, Berks County, PA
R. Medley (exact or similar names) - Cootstown, Berks County, PA

USPTO Classifications:
172/213

Tool Categories:
agricultural : plows

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Granted: Jun. 11, 1829

Patent Pictures:
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Description:
Cootstown, PA is now Kutztown, PA. Patentee's address also listed as Richmond, Berks county,PA.

Listed in A List of Patents Issued by the United States, from 1790 to 1847, 1847, pgs. 20 & 539.

Most of the patents prior to 1836 were lost in the Dec. 1836 fire. Only about 2,000 of the almost 10,000 documents were recovered. Little is known about this patent. Only the patent drawing is available. This patent is in the database for reference only.

“The specification tells us that there is a beam with a double mould-board, pointing both ways, but both facing on the same side; two shares, and two coulters, also pointing in opposite directions, the space between the shares being closed, and also the mould-boards closed on the land side. To the above-mentioned beam there is another beam [attached] which runs, or rather revolves, upon a pivot in the centre of the first mentioned beam. To the latter beam the handles are attached, and when it is desired to turn the horses, it can be done at pleasure. The upper beam is secured upon the lower by a screw upon the pivot, and by an iron pin at the end to which the handles are attached, which may be drawn out at pleasure whenever it may be desirous to change the direction.

Who was really the “ original inventor or discoverer” of this plough, we do not pretend to know, but by turning to page 116, of our last volume, it will be seen that a patent was obtained by a certain John Cromwell, of Maryland, in 1816, for a plough as much like the foregoing, as one pin is like another. We should advise our agricultural friends who wish to buy rights, to deal with Mr. Cromwell, who, as his patent is just expiring, will undoubtedly sell cheap, whilst the Messrs. Altenderfer, having a new patent, must be paid accordingly.”

Journal of the Franklin Institute Vol. 6, Sept. 1829 pg. 181

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