Automatic water or liquid safety valve assembly

A combination of an automatic liquid or water safety valve assembly having an electric power source and a solenoid-operated wedge type valve and a valve seat in a pipe connected to a water main, comprising:

• a hollow liquid sensor having a top, a pair of spaced electric terminals projecting from the undersurface of said top and extending into the interior of said hollow liquid sensor, said hollow sensor having an open bottom and a screen secured to the bottom edge of said sensor, at least one opening in said sensor adjacent to the bottom edge thereof permitting liquid on a floor to enter said hollow sensor, an element within the confines of said liquid sensor which is movable vertically and is provided with an electrically conductive plate on the top surface thereof, said movable element being of sponge-like expandable material whereby when wetted expands vertically to elevate said electrically conductive plate into engagement with said spaced terminals to bridge the same and complete an electrical circuit to energize said solenoid operated water safety valve to close and to remain closed due to the binding of said wedge type valve on said valve seat, and flexible switch means coacting with said electrical circuit and being operatively connected to said solenoid to be moved by the latter momentarily after the solenoid is energized to shut-off the electric power source.