. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. ntre of gravity. E is apail- of untempered steeldi-aught springs, which are ofuniform width, with planededges, and are jointed withan accurately fitted pin atone end, and two such pinswith a short link at theother end. This arrange-ment prevents any. tendencyto parallel motion, as wouldbe the case if there were linksat both ends ; and at thesame time permits each barfreely to assume its own shapeand length, when understrain, which could not be thecase if the springs wereattached immediately to oneanother a
. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. ntre of gravity. E is apail- of untempered steeldi-aught springs, which are ofuniform width, with planededges, and are jointed withan accurately fitted pin atone end, and two such pinswith a short link at theother end. This arrange-ment prevents any. tendencyto parallel motion, as wouldbe the case if there were linksat both ends ; and at thesame time permits each barfreely to assume its own shapeand length, when understrain, which could not be thecase if the springs wereattached immediately to oneanother at both ends. Thelongitudinal section of thesprings is approximately par-abolic, the bases being at thecentre eye in each case. There are three pairs of these springs readily interchangeable, two pairsbeing 4 ft. long between end centres, and suited for maximum pulls of 600 and 1000 lb., and thethird pair 5 ft. long, working up to 1600 lb. pull. The centre eye of the front spring is heldby an accurately turned pin C, carried in a fork cast on the front end of the bed-plate; the eye of. 508 DYNAMOMETER. the other spring is similarly carried in a fork on the end of the turned draught bar, and is carriedonly m two bearings F behind the fork end, and the oil cylinder G at the back of the bed-plate Behind the bearing F the draught bar is flattened, and the draught plate HH is jointed to itwith washers above and below, to ensure great freedom of motion horizontally. This draught plateis a very important detail, and represents a horses shoulders and collar; it is attached to the
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectenginee, bookyear1879
