National Geographic : 1919 Nov
Graton &Kni Standardized Series Leather Belting Tanned by us for belting use t A Bulldog for Punishment T HE wheels of industry are turning faster than ever before. Production is the world's problem. On thousands of pulleys SparOak Leather Belting is singing through the strain of 24-hour days year in and year out. SparOak is a combinationbelt. It has a live, elastic inner facing of Graton and Knight Spartan Leather that grips a pulley as it stuck to a steer's back. Its pliability insures perfect operation under high speeds with fluctuating loads running on any size pulleys. The outer ply is of Oak Tanned Center Stock and possesses unsurpassed toughness and durability. Pulley flanges, step cones, and the punch ing of shifters find it a bulldog for punishment. SparOak Belting Are you getting 100 per cent results in your power transmission these feverish production days ? Too often our engineers find the wrong belt on the job. The requirements of power transmission fall into a small number of classes. Graton and Knight's booklet on Standardization in Belting gives the Standard Belt for each one of these classes. It's a small book, but it has solved many a trans mission problem. It will be sent free upon request-without obligation. THE GRATON AND KNIGHT MFG. COMPANY Worcester, Mass., U. S. A. Oak Leather Tanners, Makers of Leather Belting and Leather Products Branches and Distributors in all Principal Cities SparOak in a Cotton Mill SparOakBelting is seenin this picture operatng on spanning frame drives in one of the largest cotton mills in the world. SparOak's flexibility. pulley gripping power, and endurance have na,e it thOestandard for work of this kind. SparOak with its permanent elasticityand tensile strength will pull its load at top speed for years with a minimum number of stops. "Mention The Geographic-It identifies you'