| 摘要 |
<p>The seat 3 and lid 4 of a water closet are counterbalanced by weights 16, 17 in auxiliary water tanks 7, the tanks 7 having inlets 20, 21 from the cistern 5, and drain outlet valves 22, 23. An electrical circuit, Fig. 7 (not shown) controlled by push buttons (8, 9, 11) seat switch (13) and timers (RT9, RT13) is arranged to actuate (a) the float-controlled inlet valve of the cistern 5, (b) the cistern flush discharge valve 12, and (c) the auxiliary tank drain valves 22, 23. The draining or filling of the auxiliary tank changes the effective counterbalance weight to cause the raising or lowering of the seat or lid, and the electrical circuit is adapted to cause automatic flushing of the water closet a short time after use. <IMAGE></p> |
