Abstract: A catch comprising a plunger member and a guide member, the plunger member being able to reciprocate in the guide member, with a nose of the plunger member extending out of the guide member, each of the members being a single moulding of a plastics material, one or both members including one or more tongues which extend primarily in the direction of relative reciprocation of the members and are resiliently flexible transversely to that direction, each tongue engaging a cam or a tongue on the other member in such a manner that forces act on the tongues having components parallel to the direction of relative reciprocation of the members, in the sense which urges the members towards a limit of relative reciprocation at which the extension of the nose out of the guide member is greatest, and if the nose is displaced into the guide member and released, then the plunger member returns to the said limit.

Abstract: A pivotal mounting, especially for an automobile sun visor, comprising a one-piece plastics sleeve having a generally cylindrical bore, the radially inner surface of which, when viewed along the axis, has a first number of radial undulations spaced around its circumference, in combination with a generally cylindrical member which is a one-piece plastics moulding and lies substantially coaxially within the bore, the radially outer surface of the member, when viewed along the axis, having a second number of radial undulations spaced around its circumference, both numbers being greater in value than one, and being different, the arrangement being such that each set of said undulations can register firmly with the other at a third number of relative angular positions of the sleeve and the member, the third number being greater than the first and second numbers.