ELECTRONIC LOCK Russian patent published in 2011 - IPC E05B49/00 

FIELD: construction.

SUBSTANCE: electronic lock comprises mechanical locks 1.1 "Entry" and 1.2 "Exit", the first 2.1 and second power supply breakers, the first 3.1 and second 3.2 actuating units, a radio transmitter 4, a radio receiver 5, a coding facility 6, the first 12 and second 13 multipliers, a narrow-band filter 14, a low-pass filter 15, a memory unit 16.1-16.n, correlators 17.1-17.n, 22.1-22.n, threshold units 18.1-18.n, 23.1-23.n, the first 20, second 25.1 and third 25.2 logical elements "OR", triggers 24.1-24.n and a time accounting system 26. The coding facility 6 comprises a band transceiving antenna 7, an interdigital converter of surface acoustic waves, made of two combed systems of electrodes 8, applied onto a piezocrystal 19 surface. Electrodes 8 of each comb are connected to each other by means of busbars 9 and 10, which in their turn are connected with the transceiving antenna 7.

EFFECT: expansion of functional capabilities of an electronic lock by accounting of arrival, departure and attendance time of employees at an enterprise.

1 cl, 3 dwg