Span′ner.
1. A fireman's wrench by which he fastens or unfastens the couplings of the hose. The curve follows the shape of the coupling, and the eye is caught over the stud on the collar, so as to wrench it fast or loose it, as the case may be. Another form of spanner has merely jaws which fit upon nuts or faceted collars. See monkey-wrench, Fig. 3214, page 1473. See also wrench.2. (Steam-engine.) A bar used in the parallel motion of the side-lever marineengine. b c, radius-rod; d g, spanner. See Par-Allel motion, Fig. 3549, page 1631.
