Manufacturer who made wire matresses, sewing machines and latter vaccuum brake equipment, such as the Gresham Dreadnought ejector, steam injectors and other locomotive equipment; founded by James Gresham, Thomas Craven and John Spier Heron in 1869 as Heron, Gresham & Craven, at the Craven Iron Works, Odsall Lane, Salford; J S Heron left the company due to ill health in 1875, company becoming known as Gresham & Craven from about 1879; became sole suppliers for Vacuum Brake Company in 1879; ceased production of sewing machines around 1884; taken over by Westinghouse Brake & Signal Co Ltd in 1954.