Support for a pressure-sensitive elevated floor

Abstract

A support for a pressure-sensitive elevated floor, comprising a support body, a supporting plate assembly, a membrane, and a containing ring. The support body has a base placed on the ground. The supporting plate assembly is set on the support body and has a lower plate and a cap, which enclose a pressure chamber filled with oil and sealed by an elastic ring. An accommodating chamber is cut into the lower plate at a central position, accommodating a contact switch. The membrane covers the accommodating chamber, being exposed to oil pressure in the pressure chamber. Upon increased oil pressure, the membrane is deformed downward, so that the contact switch is operated and a signal is generated. The containing plate fixes the membrane on the lower plate, having a central opening which allows oil pressure in the pressure chamber to reach the membrane at an exposed area thereof. By peripherally fixing the membrane on the lower plate, the membrane is prevented from loosening. By substituting another containing plate with a different central opening, the exposed area of the membrane and sensitivity thereof to pressure are varied.

1 . A support for a pressure-sensitive elevated floor, comprising: 
 a support body, having a base placed on the ground;    a supporting plate assembly, set on an upper end of said support body and further comprising a lower plate and a cap, which enclose a pressure chamber filled with oil;    an accommodating chamber, cut into said lower plate at a central position;    a contact switch, placed inside said accommodating chamber;    an elastic ring between said lower plate and said cap;    a membrane, covering said accommodating chamber, sealing said accommodating chamber from said pressure chamber, said membrane being exposed to oil pressure in said pressure chamber, being deformed downward upon increased oil pressure, so that said contact switch is operated and a signal is generated; characterized in that:    a containing plate, fixing said membrane on said lower plate and having a central opening, allowing oil pressure in said pressure chamber to reach said membrane at an exposed area thereof,    wherein, by peripherally fixing said membrane on said lower plate, said membrane is prevented from loosening.    
     
     
         2 . The support for a pressure-sensitive elevated floor according to  claim 1 , wherein, for varying said exposed area of said membrane, said containing plate with said central opening is substitutable, modifying sensitivity to pressure of said membrane.  
     
     
         3 . The support for a pressure-sensitive elevated floor according to  claim 1 , wherein said containing plate is shaped like a ring.  
     
     
         4 . The support for a pressure-sensitive elevated floor according to  claim 2 , wherein said containing plate is shaped like a ring.  
     
     
         5 . The support for a pressure-sensitive elevated floor according to  claim 1 , wherein said containing plate is fixed on said lower plate by a plurality of screws.  
     
     
         6 . The support for a pressure-sensitive elevated floor according to  claim 2 , wherein said containing plate is fixed on said lower plate by a plurality of screws.  
     
     
         7 . The support for a pressure-sensitive elevated floor according to  claim 3 , wherein said containing plate is fixed on said lower plate by a plurality of screws.  
     
     
         8 . The support for a pressure-sensitive elevated floor according to  claim 1 , wherein said lower plate and said cap are fastened to each other by a plurality of screws.  
     
     
         9 . The support for a pressure-sensitive elevated floor according to  claim 8 , wherein each of said plurality of screws passes through a hole in said lower plate that is wider than each of said plurality of screws, allowing said plurality of screws to glide freely in a longitudinal direction.  
     
     
         10 . The support for a pressure-sensitive elevated floor according to  claim 8 , wherein said lower plate has a thickness and each of said plurality of screws has a length greater than said thickness of said lower plate, allowing space for said plurality of screws to move against said lower plate.  
     
     
         11 . The support for a pressure-sensitive elevated floor according to  claim 9 , wherein said lower plate has a thickness and each of said plurality of screws has a length greater than said thickness of said lower plate, allowing space for said plurality of screws to move against said lower plate.  
     
     
         12 . The support for a pressure-sensitive elevated floor according to  claim 1 , wherein said cap is provided with an oil inlet.  
     
     
         13 . The support for a pressure-sensitive elevated floor according to  claim 8 , wherein said cap is provided with an oil inlet.