Abstract: An injection device for delivering a dose of medicament from a syringe includes: a housing including a forward body and rearward body and wherein the forward and rearward body are axially moveably interconnected; a drive mechanism arranged, in use, to be released from an energized position to deliver a dose from the syringe; a latch arranged to hold the drive mechanism in the energized position; and a trigger for releasing the latch; wherein the injection device further includes an interlock arrangement moveable between a locked position in which release of the drive mechanism is prevented and an unlocked position in which the drive mechanism may be released, the interlock arrangement including: an internal blocking formation associated with the rearward body and positioned between the latch and trigger, and wherein in use, forward movement of the rearward body relative to the forward body moves the blocking formation into the unlocked position.

Abstract: The photovoltaic system includes a plurality of photovoltaic modules which are connected to form a string or several strings connected in parallel, thereby forming a photovoltaic generator having a positive terminal and negative terminal. A DC constant voltage source connected to the photovoltaic generator to raise the potential of the positive terminal relative to ground potential. This reduces the flow of electrons out of the TCO layer of the modules, thereby reducing or completely eliminating cathode discharges which damage the modules.

Abstract: There is disclosed an improved rooflight 100. A first aspect of the rooflight provides a perimeter lip 1401 which protects an edge of a pane 210 of glass from being accidentally chipped or cracked. A second aspect of the present invention provides a channel for a blind 1100, which channel is formed by two cooperating channel sections 1601, 1602. A third aspect of the present invention provides a flashing system 1700. Another aspect of the rooflight 100 provides a water deflector 450 for preventing rain water from impinging directly onto a weather seal between a casement 120 and baseplate 110. Another aspect provides removable linings 610, 620, 1210, 1220 which can be mounted an interior face of the casement 120 and/or baseplate 110. Another aspect provides a slot 1000, for securing flashing 800, 810, which extends around the perimeter of the baseplate 110.