Abstract: An organopolysiloxane composition capable of cure to an elastomeric body, the composition Comprising an organopolysiloxane containing polymer having not less than two reactable silicon-bonded groups selected from alkenyl group, condensable groups, silyl-hydride groups and/or one or more trialkylsilyl containing terminal groups, optionally a siloxane and/or silane cross-linker having at least two groups per molecule which are reactable with the reactable groups in (a); 5 to 50% by weight of the composition of at least one compatible natural oil and/or natural oil derivative based extender and/or plasticiser; a suitable cure catalyst and optionally one or more fillers. The compositions are particularly useful as sealants.

Abstract: A method of covering a core yam with a cover yarn characterised in that it includes supplying a package of core yam on a member which is fixed against rotation, supplying a package of cover yam, guiding the cover yarn to form a loop which on rotation about an axis defines an envelope which surrounds the core yarn package, drawing off core yarn along the axis of rotation of the envelope in the direction away from the cover package so that when the core yarn intercepts the envelope it is covered by cover yarn.

Abstract: A locking mechanism for a trigger-operated firearm comprises a base plate adapted to be attached to the underside of the firearm frame, and a trigger guard member which slidably engages the base plate. The trigger guard may be moved from a forward locked position, wherein the rear portion of the arcuate trigger guard abuts the trigger thereby preventing actuation of the trigger, to a rearward activated position which allows free movement of the trigger. A spring-operated latch activates the trigger guard member in either the locked or the activated position. When the trigger guard member is in the locked position, a padlock receiving orifice in the base plate is exposed; when the shackle of a padlock is extended through this orifice in the base plate, the guard member cannot be moved to the activated position.