818 : rEDESAL BBFOBTES. �plan is shown in the patent to L. Burna of June 11, 1867. The plaintiff's invention was for the purpose of avoiding the troublesome projections of the Thorp patent; which made the bendijQg a laborioug work. , The central part of the body of the Clark blank was curved, and the obliquely bent arms of the blank were also rounded where they joined the central curved body, the curve of these arms being the reverse of the curve of the body. When this blank was put into a bending die, in which the arms were held by clamping mechanism, the blow of the hammer upon the curved back "upset" the sur- plus metal in the curved portion, forcing it right and left towards the rounded corners, so as to fill up any deficiency of metal which might.be caused by bending the arms, and tp foim sharply-defined right angles. The inven,tion was a blank having a curved body, whereby surplus metal was pro- vided by the process of "upsetting" for the formation of Bharp angles at the points where rounded or curved or equivr' aient formed arms join the central portion of the body, and are bent into the ears of the shackle. The specification says : "The blank, which is made in the shape of a cross in ths usual manner, is placed upon the lower die, A, and theupper die, B, is then foroed down upon it, whereby the arms, (ia;oi, the blank are bent into an, oblique direction, and the bodyi h, is curved, as shown in the figure. The portion of the blank where the arms join the body is rounded, as shown on both the inside as well as on the outside ; the straightening of tha body of the shackle pushing out sufiicient material for form- ing the sharp cornera without having. any hindersome or im- piractical projections. The dies are formed so as to give to the blank the required shape." • �The claimsare: "(1) The carriage shaft shackle-blank, so formed between dies that the body, i, of the blank is curved, substantially asi hscein shown and deseribed ; (2) the dies, A and ^, for> makiiig the gaid blanks^ when so construoted and arranged as to form the rounded corners and the curved body of the said blank, substantially as herein shown and de- acribed," ; �Julius B. Savage, of Southington, was a licensee under this ��� �
