| 摘要 |
1,140,954. Vibrators. BETEILIGUNGSUND PATENTVERWALTUNGS G.m.b.H. 1 July, 1966 [3 July, 1965], No. 29583/66. Heading F2X. [Also in Division B2] A resonant vibrating device, such as a screen 1, has a mass 4 excited by a rotary eccentric mass 5 and connected by rubber springs 3 to a box girder 2 rigid with the screen. The latter is mounted on springs 6 and connected by leaf springs 7 to the mass 4. Since the springs 3 are stiffer in the compressive than in the shear direction, a linear vibration is imparted to the screen. In a modification, the eccentric mass rotates about an axis perpendicular to that shown and the springs 7 are dispensed with. Stop buffers 8 limit the amplitude of vibration in both embodiments. |
