Abstract: Two secateur jaws are jointed together by means of a pin with radial lugs engaging a ring attached to one jaw and extending through a sleeve slidably arranged in the two jaws. Said sleeve encloses a helical return spring between the sleeve and the head of the pin. The head of the sleeve has an external screw thread with a ring screwed thereon for adjusting the tension of the spring. The sleeve may be moved axially by screwing said ring on or off to change the tension of the spring and thus the force exerted by the latter on said jaws, whereby the engagement pressure therebetween also changes.

Abstract: A screw extending through the knuckles of the arm hinge of a pair of spectacles and having a threaded end screwed into one knuckle. The part of the screw that extends beyond said knuckle has an annular groove recieivng a circlip which engages the outer surface of the knuckle to prevent inadvertent loosening of the screw with its head held in engagement with the knuckle. The size of the annular groove receiving the circlip is such that said groove is partially located within the knuckle. As a result, should the assembly become loose, it can be tightened again by replacing said circlip with another slightly thicker circlip.