. Treatise on the radical cure of hernia by instruments : embracing an analysis of the mechanical properties of the various trusses now in use, a description of the new instruments invented by the author, and general directions to patients for the safe employment of these instruments, with hints to surgeons in their application, jects for criticism, I shall endeavourto choose those in which we find involved the mecha-nical principles of all the others : for, to notice everyvaunted modification of the truss would require afolio of enormous size. SECTION 2. OF THE ATTACHMENTS OF TRUSS PADS
. Treatise on the radical cure of hernia by instruments : embracing an analysis of the mechanical properties of the various trusses now in use, a description of the new instruments invented by the author, and general directions to patients for the safe employment of these instruments, with hints to surgeons in their application, jects for criticism, I shall endeavourto choose those in which we find involved the mecha-nical principles of all the others : for, to notice everyvaunted modification of the truss would require afolio of enormous size. SECTION 2. OF THE ATTACHMENTS OF TRUSS PADS. In order to admit of a self-adjustment or an easyregulation of the pad, various machinists have attach-ed this most important part of the apparatus to thespring by means of a pivot, a hinge, or a racket, withor without an accessor!/ spring. An old and very ingenious contrivance with a regu-lar hinge attachment is seen in fig. 2, in which a repre- 42 ATTACHMENTS OF TRUSS PADS. sents a soft elliptical or oval pad with a metallic back^on which is fixed the curved spring c, playing, by meansof a small brass friction-roller, upon a brass slide b, whichmoves in a window c, in the main-spring. It is attach-ed by a common hinge to the pad, and is fixed in themortise by the rivet and nut d. Fig. 2.—the ROLLER-SPRING PAD a The elliptic pad. b The slide on which the roller plays. c The curved spring of the pad. t? The nut securing the slide to the main-spring. e The window in the main-spring, to give play to the slide. /The main-spring. g The hinge of the pad. This contrivance has undergone several figure is taken from Marshs patent, and it is veryobvious that the design of the attachment is to enablethe pad to adapt itself to tlie changes in the form of theabdomen in various positions of the body. I shall first endeavour to show tliat this power ofadaptation is unnecessary; and, secondly, that the at-tempt in this instance may produce serious inconve-ni
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Keywords: ., bookcentury1800, bookdecade1830, booksubjecthernia, bookyear1836
