Cornell Type tester

There are several different methods used for the evaluation of innersprings and boxsprings, testing for measurements regarding firmness, firmness retention, durability, effect of impact etc. The Cornell Type Tester is used to test the long term capacity of bedding to resist cyclic loading. The machine consists of a double hemispherical ram head on a manually adjustable shaft. A load cell is located on the ram head to measure the force being applied to the mattress. The shaft is connected to an adjustable eccentric which is rotated by an electric motor at up to 160 cycles per minute, variable. The bedding is located below the ram, and the eccentric and shaft position adjusted so that the maximum load of 1025N and the minimum load of 22N is applied when the eccentric is rotated to the lowest and highest positions respectively. A position transducer is located so the position of the ram head can be measured automatically.