G - Physics – 01 – F
Patent
G - Physics
01
F
340/146.2
G01F 23/60 (2006.01) G01F 23/00 (2006.01) G08B 21/00 (2006.01)
Patent
CA 1336615
An apparatus for use in association with a control means for measuring surges in the groundwater of a water table, caused by seismic conditions, comprising a hollow elongate receptacle adapted to float parallel to the groundwater during static groundwater conditions; a weighting means at one end of said receptacle; an axial holding channel at the midpoint within the interior of said receptacle; an series of axial grooves spaced on either side of said axial holding channel, each of said grooves having an electrical switch of a signal circuit located therein; means for connecting said electrical switch to the control means; and a viscous conductive liquid within holding channel of the receptacle, while at rest; the arrangement being such that when the receptacle is vertically displaced from the horizontal, by either the rise and fall of the liquid, the conductive liquid is displaced from the holding channel and, sequentially, into the spaced axial grooves, away from the ballast during rising conditions and in the direction of the ballast during falling conditions, to sequentially close the electrical switch within each of said grooves and thus complete a signal circuit to indicate a rise or fall in the level of the liquid, a surge condition being indicated by the rapidity of signalling, over time, as the circuits in the spaced axial grooves are sequentially closed.
613398
Hunt Donald R.
Ridout & Maybee Llp
LandOfFree
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