ELECTROMAGNETIC LOCK Russian patent published in 1995 - IPC

FIELD: household appliances. SUBSTANCE: electromagnetic lock has body 1, cross-bar 2, electromagnet 3 with coil 7 and core 11, that is connected with cross-bar 2, control unit of electromagnet 3. Cross-bar 2 is spring-loaded and has two grooves. Lock additionally has electromagnet 4 with coil 8. Coils windings 7 and 8 are connected in series. Electromagnets 3 and 4 have armatures 15, 16 and L-shaped magnet conductive members 13, 14. One end of each armature 15 (16) is laid in grooves of lock by trunnions and opposite end of each armature is located in corresponding groove of cross-bar 2. Vertical component of each L-shaped magnet conductive member 13 and 14 is rigidly connected with corresponding core 11 or 12 and is ended by trunnions, laid in grooves of body 1. Horizontal component of magnet conductive members 13, 14 touches laid in lock body 1 parts of armatures 15 or 16 of corresponding electromagnet 3 or 4. In the case, space between armature 15 and core 11 of first electromagnet 3 is twice less, than space between armature 16 and core 12 of second electromagnet 4. EFFECT: electromagnetic lock is used in entrance doors locking systems. 5 dwg