Abstract The invention relates to a device for and a method of testing whether the safe working load of the links of a chain, whether it be a lashing and/or a belaying chain, is being exceeded. The invention provides that an overload testing device is detachably connected in parallel with a portion of the chain length to two links of the chain to be tested so that the normal distance between said two links is reduced by the testing device and so that the links intervening between said two links are completely relieved of load. Advantageously the testing device includes at least one intermediate member which is visibly deformed when the safe working load of the links of the chain to be tested is exceeded. The invention also embraces a chain in combination with such an overload testing device.
A device for visually indicating the safe working load of a chain including interconnected links comprising a pair of chainshortening dogs removably attachable to two spaced links of said chain, said dogs being interconnected by chain links, at least one of said last-mentioned links having a tensile strength less than the links of said chain whereby elongation thereof occurs when the safe working load on said chain links has been exceeded, said dogs being interconnected to said chain links so that the chain links intervening therebetween will be slack enabling any change in shape of said chain-shortening dog links to be visible.
Claim 2
Independent Claim
102 words
A device for visually indicating the safe working load of a chain including interconnected links comprising a pair of chainshortening dogs removably attachable to two spaced links of said chain, said dogs being interconnected by chain links, at least one of said last-mentioned links having a tensile strength less than the links of said chain whereby elongation thereof occurs when the safe working load on said chain links has been exceeded, said dogs being interconnected to said chain links so that the chain links intervening therebetween will be slack enabling any change in shape of said chain-shortening dog links to be visible.
Claim 3
Dependent Claim
22 words
In a device according to claim 1 wherein said chain-shortening dogs are removably sleeved over the two spaced links of said chain.