| 摘要 |
<p>PCT No. PCT/SE81/00150 Sec. 371 Date Dec. 30, 1981 Sec. 102(e) Date Dec. 30, 1981 PCT Filed May 19, 1981 PCT Pub. No. WO81/03355 PCT Pub. Date Nov. 26, 1981.A cylinder lock-key combination includes a cylinder housing (1) having arranged therein a rotatable cylinder plug (2) having a slot (3) for a key (8). Arranged on the spine of the key is coded information in the form of regions (8a, 8b) of mutually different magnetic permeability. When the key moves relative to the housing these regions cause variations in a magnetic flux generated by a magnetic body (5k) and passing the key slot (3). A differential field plate (5) arranged in the housing and incorporated in an electric circuit, which also incorporates a bridge coupling, is arranged to convert said magnetic flux variations to momentary changes in resistance in the electric circuit, causing the bridge coupling to become unbalanced so that an electric pulse train corresponding to the coded information is generated in the circuit. This pulse train is sensed and evaluated by means, for example, of a data processing device. The invention also relates to a cylinder lock and a key for said combination.</p> |
