Model: 017 Universal Joints
A universal joint is a connecting link between two shafts which are out of line or changing position. Its purpose is to transmit power, one end being the driver, the other end being driven, between two shafts which are at any desired angle. A good example of its use is in the automobile where the driven shaft is out of line with the engine or driving power.
[Virginia Downward & William M. Clark, 1930]

[Editor’s Note: This mechanism is sometimes called a Hooke's joint though variations of it can be found in Renaissance machine notebooks of Leonardo da Vinci as well as in ancient Chinese writings. There is a series of models of Reuleaux (1880), P-1 to P-5, that illustrate several different topologies for transmitting motion between two out-of-line shafts. The Clark models were likely copied after Figures 50, 51 in Henry T. Brown's 1868 catalog on mechanical movements. Brown's drawing was also likely copied from the famous French-Spanish machine taxonomy of 1808 by Lanz and Betancourt, entry 8-'O'. FCM]

Francis Moon 2005-00-00

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