The engineer's sketch-book of mechanical movements, devices, appliances, contrivances and details employed in the design and construction of machinery for every purpose; (1902)
Barber, Thomas Walter. [from old catalog] · New York, Spon & Chamberlain · leaf 89
entral standard,the distance A should equal the difference between the major andminor axes of the ellipse. 605. Performs the same operation in a similar way; A is fixed; B is same diameter as A; and C = J diameter of A and B. 606. Common trammel or ellipsograph. There are other forms of apparatus… … 595. 596. 597.
Mechanical movements
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