Security arrangements

摘要

A security system for use in supermarkets and other retail outlets comprises a plurality of shopping trolleys and at least one point of sale terminal 10. Each point of sale terminal 10 comprises a transmitter 14 which provides an adjacent trolley 13 with an electronic token once the goods in the trolley have been paid for. Each trolley 12 comprises a brake 19 on one its wheels which is applied in the event that an attempt is made to take the trolley out of the outlet without an electronic token having been received. The system thus prevents trollies being taken out of the outlet until the goods therein have been paid for at a point of sale. <IMAGE>