Name/Title
Patent 1741Entry/Object ID
2025.3.92Tags
1800s, british, patent summary, shears, sheep, marsdenDescription
1741. Marsden, H. M. June 10.
Shears. -- Relates to modifications and manufacture of the sheep and other shears described in Specification No. 1981, A.D. 1871. The shears are made with a rib on the outside or inside of the spring bow, which is fitted with a ring or swivel. The bow may be single or double, as shown at f, Fig. 5. The necks are made with stops d, Fig. 4, "double or connected with both sides of the "shank." The blanks for the blades are cut out so that there is little waste, as shown in Fig. 9; the blades are strengthened by continuing the curve of one side of the shank along the neck of the blade, or by widening the neck by projections from the sides of the blades i, Fig. 4. The parts intended to form the shanks and bow are doubled, or placed over another blanks and reduced by rolling. A lining of steel is welded to the prepared blanks, or before the blanks are cut out a lining of steel is welded into a recess made obliquely across the plate, which is then cut along the centre of the steel lining. The back of the blade may be strengthened by cutting away the superfluous part of the blank and welding it on the end of the shank or side of the blade. The blanks may be forged and shaped by the aid of a succession of suitably-shaped dies worked by power. A piece of steel or steel-coated iron is selected, and the neck, shank, and blade are shaped by the action of dies successively. In hardening the shears, they are set with their backs in a grooved plate and placed in a furnace; the blade may be held by tongs or covered with a metallic jacket which covers the part requiring to be soft, before dipping the blade into the cooling liquid. The Provisional Specification refers (1) to a method of strengthening the blades by corrugating the back in the direction of their length; (2) to an apparatus for punching out or paring the blanks by dies or shearing blades; (3) to a method of bending the bows of the shears over a block by means of jointed levers.Cataloged By
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Marsden, H.M.Created By
studygroup@scissornet.orgCreate Date
February 11, 2025Updated By
studygroup@scissornet.orgUpdate Date
February 11, 2025