George Eckhardt is credited with inventing the second in 1771.The parallel rule was superseded for most uses by the T-square in the 19th century, but navigators continue to use parallel rules in conjunction with gridded charts.The instrument comes in two main forms: two rectangular straight edges connected by brass or silver hinges, or a single frame surrounding a roller.The first type was known in Europe by 1600, while Englishman A. Section consolidates sections 549, 553, and 555 of title 28, U. C., 1940 ed., as amended with necessary changes of phraseology. Appeal was formerly conferred by section 282 of title 8, U.
The phrase “filing fee” was substituted for the inconsistent and misleading words of sections 549 and 553 of title 28, U. C., 1940 ed., “as full payment for all services to be rendered by the clerk” etc. C., 1940 ed., for payment of fees by the parties instituting criminal proceedings by indictment or information, was omitted. C., 1940 ed., for taxation of fees as costs, was omitted as covered by section 1920 of this title. The mathematics collections contain about twenty parallel rules and combination instruments, dating from the late 18th century to the late 20th century and ranging in length from 6 to 24 inches.The objects are made from ebony and other woods, brass, German silver, and plastic.Below are images showing the two patent dates that often cause confusion.Watches manufactured prior to 1926 are difficult to date with certainty.