called a PayLoader, and the purchase of French company Yumbo, which produced hydraulic excavators. Between 1956 and 1982 IH developed and sold a range of off-road dump trucks, which were known commercially as 'PayHaulers'. International manufactured and sold an extensive range of heavy equipment. In 1974 IH renamed this division the 'Payline' division. Payloaders The original payloader model was literally a tractor which had forks welded to the front. Frank Hough was the man who invented the concept and Hough's company worked closely with IH until it was purchased in 1952. The terminology came to mean any type of front loader machine, and loaders were manufactured in a number of varieties, included wheeled and track loaders, rear wheel loaders or an articulated steering design. PayScrapers In the early 1950s contractors worldwide began using motor scrapers as a means of shifting dirt. IH had a hole in its product range; it did not offer a motor scraper product to the market. One of IH's suppliers, a company named Heil Earthmovers, manufactured a range of scrapers called 'Heiliners.' Rather than spend money on R&D and enter the market at a later date, in 1953 IH bought Heil's road machinery division, incorporating a range of motor and towed scrapers. Attachments: blades, buckets, rippers and compaction equipment IH International had a supply agreement for its heavy tractor attachments with a company called Bucyrus-Erie. Amongst a variety of attachment solutions Bucyrus-Erie made a range of cable and hydraulically operated blades which fitted International-Harvester track type tractors. IH purchased the blades range from Bucyrus-Erie in the 1950s and absorbed these into its machinery division. IH also purchased attachments for the tractor range from Isaacson, including logging arches and dozer blades. Carrying on with its expansion IH purchased Isaacson's attachments division in 1952. Electrall The Electrall system was introduced in 1954; it was a short-lived attempt to market electrically operated farm equipment and accessories. The system, co-developed with General Electric, consisted of a 208 V three-phase alternating-current generator connected with electric cables to the device to be powered. The generator could even power a household. A 10 kW Electrall generator was an option on the Farmall 400 tractor, and a 12.5 kW PTO-driven version was made. The possible applications of Electrall power were many, but few made it to market. IH marketing materials showed a haybaler being Electrall powered. One of the more novel applications of the