| 摘要 |
1,213,966. Electromagnetic actuators; electromagnetic relays; electric selectors. INTERNATIONAL STANDARD ELECTRIC CORP. 19 March, 1969 [28 March, 1968], No. 14396/69. Headings H1L, H1N and H1P. The frequency of vibration of the armature of an actuator is reduced by forming it in two or more parts associated over their major faces but not rigidly connected together. As shown, Fig. 3, the armature of an actuator suitable for operation of a cross bar switch or relay, comprises two members 10, 11 which replace a similarly shaped and dimensioned onepiece armature of a known arrangement, Pigs. 1 and 2 (not shown). When energized, member 10 pivots about lug 12 and strikes the coil core setting up high-frequency vibrations, member 11 simultaneously pivots and strikes member 10 also setting up high-frequency vibrations, and the armature parts then stick together the two high-frequency vibrations combining to form a low beat frequency. This is said to reduce the chance of breaking the armature. The armature parts may be held together by an elastic member, e.g. a clip. The armature may be divided into more than two similar parts. The armature of a plunger style actuator may be subdivided along its length, and such an armature may be rectangular, Fig. 4 (not shown), or circular in cross-section. |
