Watchman's clock system

Watchman's clock system comprising a portable time clock capable of interrogating and reading one or more of a plurality of radio frequency transponders, each of which is located at and is programmed with an identification code representing a specific location, and is responsive to a radio frequency interrogation signal from the time clock, to transmit a radio frequency signal including the identification code for reception by the time clock, of recording the identity of each such radio frequency transponder and hence its specific location, and of storing such recorded information therein for subsequent transfer to a computer, in which the time clock comprises means for generating dial tone multi-frequency (DTMF) tones and in which information stored in the time clock is transferred from the time clock to the computer via a modem by means of such tones.

Watchman's clock system comprising a portable time clock capable of interrogating and reading one or more of a plurality of identification means, each of which may represent, and be located at, a specific location, without any physical contact being made between the time clock and such identification means, of recording the identity of each such identification means, and thereby its specific location, and of storing such recorded information therein for subsequent transfer to a computer, in which the time clock comprises means for generating dial tone multi-frequency (DTMF) tones and in which information stored in the time clock is transferred from the time clock to the computer via a modem by means of such tones, the time clock further including means to enable it to be programmed with and display the order in which specific locations are to be visited.