Cap for accumulator elements with device for automatic filling

DETAILED DESCRIPTION OF THE INVENTION With reference to the mentioned drawings, the cap, indicated as a whole by numeral 10, is inserted into the opening of lid 1 of a container for accumulators.
The cap 10, entirely built of plastic material, consists of a main body 20, a float 30 being connected with the main body 20 by means of a central sliding tube 21, and a toggle joint system hinged to the central sliding tube 21 for closing the valve.
Said system opens and closes the opening through which the distilled water for the re-filling of the electrolyte flows.
The top of the cap is closed by a lid 40.
The main body 10 of the cap presents two pipe joints 11 and 12.
The distilled water,delivered by a pipe system not represented in the drawing, flows in through pipe joint 11.
The pipe system is connected to a tank or to the outlet of another cap placed before cap 10.
The distilled water is collected in the ring-shaped chamber 13, which has an opening 14 at its bottom, and it flows out through pipe joint 12, which is connected by means of a pipe system to another pipe joint belonging to another cap, or it flows back to the feeding tank.
When float 30 is in its lower position, as represented in FIG.
1, the bevelled head of valve 32 is also lowered and not in contact with the OR-ring 15, since stem 33 of said valve is connected to float 30 by means of the hinged shaft 34 and lever 35.
It can now be observed that valve 32 can only slide vertically, it being guided in this movement by the radial fins 36 being present on the valve stem 33.
Fulcrum 41 of right-angled lever 35 is positioned in relation to the vertical axis of valve 32.
The short arm 37 of lever 35 is connected to the hinged shaft 34 by means of a hinge, while the long arm 38 ends with a fork in which two slots 42 and 43 are obtained.
As can be observed in FIG.
3,said slots are connected with two pivots 22 and 23 moulded on the central tube 21.
Since tube 21 carrying float 30 can also move only vertically, it being guided in its seat by the radial fins 24, it follows, as a consequence, that the push impressed on the float by the air and the gasses contained in the ring-shaped chamber 39, and being in relation to the pressure increase resulting from the uprising of the electrolyte level, is transmitted to lever 35 by means of the pivots 22 and 23 and, therefore, always in the direction coinciding with the geometrical axis x of the sliding tube 21