Abstract: A printed circuit connector assembly comprising a printed circuit card, a connector element mounted on the card for providing electrical connection with the circuitry thereon, a housing for the card formed with an opening within the connector element being exposed, and a plug element insertable within the opening into engagement with the connector element for providing external electrical connection, the connector element and the plug element respectively having metal contacts arranged to make resiliently yieldable wiping contact with one another when the plug element is inserted within the opening, and the housing and the plug element having at least one inter-engageable projection and recess for releasably locking the plug element in engagement with the connector element.

Abstract: A pet door comprises a hinged flap mounted within a fixed frame and pivotable to allow passage therethrough in both directions. A locking mechanism is provided comprising a slide with two projections thereon which, in different lateral positions of the slide, are aligned with corresponding projections or cut-outs on the flap to allow or prevent pivoting of the flap in one or both directions. The locking mechanism can thus be set as desired to allow free access in both directions, to allow access in one direction only (in or out as desired) or to prevent any opening of the flap.