| abstract |
A seismic damper device is provided between the supporting plate adjacent the bottom of an upstanding piece of electrical apparatus and the lower main frame support members, supporting said upstanding electrical equipment, so that any relative motion between the upstanding column structure and the main lower-disposed frame support structure is restricted. Preferably, a liquid-filled dash-pot assembly, or energy-absorbing device, is utilized at one or more locations extending between the lower supporting plate member of each upstanding column structure and the lower-disposed main supporting framework. n In one form of the invention there are provided three equally-spaced radially-extending support arms extending outwardly from the main supporting plate disposed adjacent and fixed to the lower end of each upstanding column structure. A hydraulic damper assembly is provided for each support arm and has its upper end secured to the outer end of the particular support arm, and the other end of the said damper assembly is attached to the main lower disposed supporting framework structure of the electrical equipment. Any relative motion between the radially-outwardly-extending support arms and the lower-disposed main supporting framework structure causes a hydraulic piston to move within a damper cylinder; provided in each of the three damper assemblies and damping is effected by the displacement of hydraulic liquid, for example, from one side of a piston member in each of the three damper assemblies to the other side thereof through small orifices provided in each damper assembly, for example. |