ACCESS CONTROL APPARATUS AND KEY MEANS

摘要

The invention provides for means for controlling the accessing apparatus (28), for example, a television set (56) and key means (10) suitable for use in such control apparatus (28), the key means (10) being arranged to interfere with radiation instant thereon so as to reflect or retransmit radiation identifying that particular key (10). The key (10) may be used in control apparatus (48) for enabling/disabling operation of a television set (56) so that the length of time the television set (56) is in operation can be controlled having regard to the identity of the user wishing to use the television apparatus (56).