Patent 4901
Patent Summary
An image of the patent summary for number 4901.
Name/Title
Patent 4901Entry/Object ID
2025.3.109Tags
1800s, british, patent summary, scissors, shears, walkerDescription
4091. Walker, J. A. Dec. 19. [Provisional protection only.] Scissors and shears. -- One blade of shears, especially such as are used for cutting cloth, is formed with a cam edge slanting downwards, the blade terminating at or near the cam, a little distance behind the joint fulcrum of the blades. Against the cam edge works the short end of a double armed lever, having its fulcrum on the other blade, and worked by the hand. The blade is brought back by a spring, and the two blades are forced apart behind their joint fulcrum by means of a spring. Instead of the cam action, a toothed rack and sector may be used; the pressing-lever carries the sector and is kept raised by a spring.Cataloged By
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Patent Summaries