Liquid level indicating arrangement for vehicles

Claim 1

A liquid level indicating system comprising a tank having an upright cylindrical shell and including a bottom for housing a liquid, a float disposed on the upper surface of the liquid and provided with a vertical aperture therethrough and freely movable in a vertical direction according to the level of the liquid, a permanent magnet carried by said float and disposed adjacent the aperture, a tubular projection extending vertically upward from the bottom of said shell, fixed thereto and closed at its upper end, said tubular projection passing through the aperture in said float for guiding the movement thereof, electrical circuit means including a source of electric power, magnetically responsive switch means housed within said tubular projection, means for providing a signal and connecting means for connecting said source, said switch means and said signal means together, said connecting means passing into said tubular projection through the bottom thereof for connection to said switch means, said switch means being operable by said permanent magnet when adjacent said switch means to operate said signal means when the liquid level drops below a predetermined point, said tank also having a top provided with an opening therein and a removable cap for closing said opening, whereby make-up liquid may be added to said tank through said opening after removal of said cap without displacing said connecting means and said switch mEans.