K & L Steelfounders and Engineers Ltd was the original company name of what would later became Jones Cranes Ltd. K&L was founded in February 1915 in a steelworks warehouse in the city of Letchworth at Hertfordshire England also the home of Shelvoke Dempster Ltd another local motor enginering company that made trucks, army lorries and gained popularity for their big SD Routechief dustcarts and other road vehicles.