will be urged outwardly relative to the remainder of free end 68 until disengagement of teeth 90 91 occurs at this time tongue 75 will be released and clamp arms 65 66 separated under the urging of flexible section 70 or by manually applied force outer wall 94 is sufficiently thin and the material of clamp ring 15 sufficiently flexible to accommodate this flexure without permanent distortion and outer wall 94 will be returned to its original position upon removal of the disengagement tool so that clamp ring 15 may be reused during such disengagement tongue 75 is prevented from following such outward distortion of outer wall 94 by the engagement of ridge 88 in groove 90 which assures disengagement of teeth 90 91 spring fingers 78 79 are best seen in fig2 and 5 the description will be limited primarily only to spring 78 although a similar function is obtained in spring 79 the spring fingers 78 79 are disposed centrally in respective clamp arms 65 66 and are adapted to protrude from the bottom surface 62 of clamp ring 15 for engagement with name plate 59 or some other similar part of the structure of coil assembly 14 spring 78 comprises an integrally molded finger of extended length having a base portion 100 emanating from upper surface 61 of clamp ring 15 and a tip 101 at the free end thereof which projects below lower surface 62 spring finger 78 is in the form of a tapered and curved lever and is subject to flexure substantially evenly throughout its length in response to an axially applied bending moment spring finger 78 is integrally molded with.