ATBECHDEDKESFRGBGRITLILUNLSEMCPTIESILTLVFIROMKCYALTR............................JDIM350 (Ver 2.1 Jan 2001) 1620000/01199425EUROPEAN PATENT APPLICATIONA320031119EP01308755.620011015EnEnEn002550920001018GB011000120010424GB20031119200347200204242002177 7E 05B 21/06 AdeZylinderschloss mit drehbaren ZuhaltungenenRotary tumbler cylinder lockfrSerrure cylindrique à gorges rotatives8 10C.E. Marshall (Wolverhampton) Limited00662724M070459PEPMarshall (Wolverhampton) Limited, C.E.75 Sumner RoadCroydon, Surrey CR0 3LNGBHarper, Barrie Samuel27 Stubby Lane, WednesfieldWolverhampton, West Midlands WV11 3NLGBMason, Jeffrey John52 Harrowby PlaceWillenhall, West Midlands WV13 2RAGBQualters, Michael Grenville7 Highfield Avenue, ShelfieldWalsall, West Midlands WS4 1PFGBMosey, Stephen George00042991MARKS & CLERK Alpha Tower Suffolk Street QueenswayBirmingham B1 1TTGBATBECHCYDEDKESFIFRGBGRIEITLILUMCNLPTSETRALLTLVMKROSI20031119200347

A rotary cylinder lock comprising a barrel (10,31) angularly movable in a housing (13) and a plurality of angularly movable, axially spaced tumblers (24) within the barrel. The tumblers have respective notches (12) which can be brought into alignment by operation of a correct key to allow a blocking member (14) to enter said aligned notches and allow angular movement of the barrel. In one embodiment tumblers are biased away from their respective positions, in which the blocking member can enter their respective notches, by torsion springs (23) at one side of a tumbler. Additionally the pack of tumblers can be sub-divided into two or more independent tumbler sub-packs by one or more dividers (39). In another embodiment, the biasing is by compression springs (30) at the circumference of the tumblers.