Perrin, Arthur M. Formerly, President, National Conveyors Company, Inc., Fairfax, New Jersey.
- Block and tackle
- Winches and hoists
- Derricks and cranes
- Overhead-traveling and gantry cranes
- Related Primary Literature
- Additional Reading
Mechanisms for raising and lowering material with intermittent motion while holding the material freely suspended. Hoisting machines are capable of picking up loads at one location and depositing them at another anywhere within a limited area. In contrast, elevating machines move their loads only in a fixed vertical path, and monorails operate on a fixed horizontal path rather than over a limited area. See also: Elevating machines; Monorail
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