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Combination:Calculating Machine and Printer, 1897

Oil-Filled Dashpot

The importance attached to the oil-filled dashpot is seen in the records of the Burroughs case file, compiled while the Franklin Institute was considering recognizing this inventor with an award. Upon reviewing the report, which was released after the award had been presented, the American Arithmometer Company noticed an inaccuracy in the description of the dashpot's function.

American Arithmometer secretary E. G. Langhorne wrote to the Franklin Institute, informing the awards committee of their mistake. The original letter is presented here, accompanied by The Franklin Institute's documentation. This text is a footnote of sorts, tucked into the report to indicate a modification of its description of Burroughs’ machine. Taken together, both documents indicate the significance of the oil-filled dashpot.