Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 21
en considered with reference to the varietj of work theycan perform. There are no slides nor reciprocating parts, and con-sequently there is no jar or vibration. The manufacturer is not,as in reciprocating machines, limited to a minimum weight of thoseparts of his machine which he would otherwise… … No. 4. The illustrations show two machines from the designs of Rich-ards, Thorne k Co., of Philadelphia, on which there are patentspending for important improvements. Mr. Richards, the senior member of the firm, has visited Englandand France to investigate the history of these and other…
Science · Technology · Meteorology · Patents
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