Abstract: A Venetian blind (1) with at least two vertically expanding ladder members (3). Each ladder member (3) comprises at least one vertical member (4), which by means of a plurality of vertically spaced ladder rungs (5, 11) is connected to at least one other vertical member (4). The Venetian blind further comprises a plurality of horizontally arranged cross slats (6) each being supported on each of the ladder members (3) by at least one of the ladder rungs (5) between the two vertical members (4). Each of the at least two ladder members (3) is carried in at least one of their ladder rungs (5, 1) by at least one carrier member.

Abstract: The invention relates to apparatus for connecting a radiator to a single or double tube type hot water central heating system. The connecting apparatus includes a conventional thermostatic valve and a conventional valve controlled bypass between the inlet and outlet connectors of the connecting apparatus. A constructural feature which results in lower manufacturing costs and a lower stock inventory for thermostats involves a return passage from the radiator outlets which has a setting valve that is actuatable independently of the bypass valve.

Abstract: A door lock having a press button operable to retract the door bolt from its engaged to its released position, and a separate operating means to positively lock the bolt whereby the press button is raised or lowered from its normal position so as to serve as a visual signal indicating whether the bolt is locked or is free for normal retraction.