Pressure responsive switches and systems pertaining thereto

Abstract

Abstract A PRESSURE SENSITIVE SWITCH, CONTAINED WITHIN A PRESSURE TRANSMITTING ENVELOPE, HAS A METALLIC SUPPORTING STRIP CARRYING A FIXED CONTRACT, AND A MOVABLE CONTACT CARRIED BY A PARALLEL FLEXIBLE METALLIC STRIP SPACED AT ITS ENDS FROM THE SUPPORTING STRIP BY INSULATING PADS SO THAT THE CONTACTS ARE IN CLOSE PROMIXITY. ONE END OF THE FLEXIBLE STRIP IS FIXEDLY SECURED IN CANTILEVER FASHION, WHILE THE OTHER END IS FREE TO MOVE EXCEPT AS RESTRICTED BY ITS SPACER. IN ONE PARTICULARLY USEFUL UTILIZATION, LEVELS OF LIQUID OR OTHER FLUENT MATERIAL ARE DETECTED AND INDICATED BY MEANS OF A NUMBER OF SIMILAR PRESSURE-ACTUATED SWITCHES DISPOSED AT DIFFERENT HEIGHTS IN THE FLUENT MATERIAL. THE SWITCHES HAVE A COMMON METALLIC SYPPORTING STRIP AND EACH SWITCH INCLUDED A FIXED CONTACT CARRIED BY THE SUPPORTING STRIP. IN ANOTHER PARTICULARLY USEFUL UTILIZATION, LEVELS OF LIQUID AND OTHER FLUENT MATERIAL ARE DETECTED AND INDICATED BY MEANS OF A NUMBER OF PRESSURE ACTUATED SWITCHES DISPOSED SUBSTANTIALLY AT A COMMON HEIGHT IN THE FLUID MATERIAL. THE SWITCHES HAVE FLEXIBLE STRIPS OF DIFFERENT RESILIENCIES OR WITH DIFFERENT CONTACT GAP WIDTHS SO THAT CLOSURE OF SWITCHES'' CONTACTS WILL TAKE PLACE AT DIFFERENT FLUID PRESSURES CORRESPONDING TO DIFFERENT LEVELS. IN BOTH DESCRIBED UTILIZATION, EACH OF THE SWITCHES IS CONNECTED TO REMOTE LEVEL OR PRESSURE CALIBRATED INDICATOR MEANS. INDICATOR LAMPS CONNECTED TO A POWER SOURCE BY MEANS OF THE SWITCHES CAN BE USED FOR THAT PURPOSE, OR A RESISTANCE NETWORK WHOSE RESISTANCE VALVE CHANGES WITH THE CLOSURE OF THE SWITCHES TO VARY THE CURRENT THROUGH AN AMMETER.

Inventors

• 👤 William G Rowell

Bibliographic Details