Removable fixation of a window sash in an opening by ratchet means

摘要

A panel fixing system is described for rapid and secure fixing of a panel into a matching aperture simply by a push fit. The fixing system comprises male and female portions 22, 24 which engage each other with a ratchet action so that the panel can be pushed home into the aperture and retained there by the ratchet. A release mechanism is provided whereby the ratchet can be released from one side. A secondary lock out system is provided to secure the panel with respect to the aperture should force be used to overcome the ratchet action.