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A washer with a "wave" in the axial direction, which provides spring pressure when compressed. Wave washers, of comparable size, do not produce as much force as Belleville washers. In Germany, they are sometimes used as lock washers but they are less effective than other choices. [a] [8] Split washer or spring lock washer
A Belleville washer is a type of spring shaped like a washer. It is the shape, a cone frustum, that gives the washer its characteristic spring. The "Belleville" name comes from the inventor Julien Belleville who in Dunkerque, France, in 1867 patented a spring design which already contained the principle of the disc spring.
The company's precursor Barlow & Seelig Manufacturing was established in 1908 and later introduced a hand-operated washer to the marketplace. The Speed Queen brand was created in 1928 with the introduction of stainless steel wash tubs in 1939 [10] and automatic washers and dryers in 1952. [11]
A lock washer is used to prevent a screw, bolt, or nut from loosening under vibration. It operates as a spring under compression having sufficient elasticity to neutralize the play between the assembled parts that vibration causes. [3] National licensed five other washer manufacturers under the patent.
A coil spring with a variable rate, usually achieved by having unequal distance between turns so that as the spring is compressed one or more coils rests against its neighbour. Rubber band A tension spring where energy is stored by stretching the material. Spring washer Used to apply a constant tensile force along the axis of a fastener ...
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