Improvements in Flushing Cisterns.
Year: 1894

page_text: COMPLETE SPECIFICATION.
Improvements in Flushing Cisterns.
We, RICHARD BROWN EVERED, Brassfounder, and NICHOLAS COLEMAN,
Whitesmith, both of 27 to 35, Drury Lane, in the County of Middlesex, do hereby
declare the nature of this invention, and in what manner the same is to be
performed, to be particularly described and ascertained, in and by the following
statement:-
This invention relates to improvements in flushing cisterus of the type disclosed
in the Specification of our prior British Patent No. 10453 granted to us on the
14th day of August 1886 and in which a lifter or piston having a flap or valve is
employed for raising a column of water above it, in order to set up the syphon
action. Our present invention has mainly for its objects to simplify the means
employed for operating the lifter and also to improve the construction of the lifter
itself.
In order that our invention may be fully understood and readily carried into
effect we will describe the drawings hereunto annexed.
Figure 1 is a longitudinal section and
Figure 2 a plan shewing a flushing tank with our improved means for elevating
the lifter.
Figure 3 is a detached view shewing the stirrup-piece hereinafter more fully
referred to.
Figures 4 to 7 illustrate our improved construction of the lifter and its flap ;
Figure 4 being a plan of the lifter shewn separately, Figures 5 and 6 respectively
a plan and longitudinal section of the flap also shewn separately; and Figure 7 a
longitudinal section of the lifter and its flap conjoined. In this last mentioned
figure the flap is shewn partially raised.
Like letters of reference indicate similar parts in all the figures.
a is the cistern and the syphon, the short leg of which, as in our previous
Patent above alluded to, is enlarged to form a chamber c within which the lifter d
with its flap is capable of moving up and down when the pivoted lever e is
operated. The manner of transmitting the motion from the lever e to the lifter
constitutes one of the essential features of our present invention and consists of a
stirrup-shaped piece of metal the vertical side limbs of which encompass the
chamber calong its vertical centre line or thereabout while its horizontal portion 1
is located beneath the lifter to which it is attached in any suitable manner. The
upper part of this stirrup-piece is provided with an eye with which the inner or
hooked end of the lever e engages. The act of pulling on the outer end of this
lever causes the inner end to rise, and carry with it the stirrup piece f which
thereby elevates the lifter and starts the syphon action.
A further feature of our present invention has reference to the construction of
the lifter d and its flap d¹ whereby the use of a pivotal connection between these
parts is avoided. Figures 4 to 7 show the manner in which we construct these
parts. The lifter d, which may be of cast iron is formed with a slot having a
lateral extension or angular portion d. The flap d', which may be stamped
or cut from thin sheet metal, is formed with a tongue d' having lateral fins or
projections de d. When the flap is to be connected to the lifter, the fin do is first
bent down as seen at Figure 6, so as to occupy a position corresponding to the
angular portion of the slot in the lifter. By now passing the fin d' through
the portion of the slot, the bent fin will be brought opposite to the angular

page_text: portion d of said slot through which it can then be passed and the entire tongue
can be thus inserted through the slot so as to project on the lower side thereof.
This having been done the bent fin d³ is then bent back into its original position
and the tongue itself is finally bent down so as to assume an inclined position
relatively to the lifter as seen at Figure 7, the inclination at which said tongue is
bent serving to limit the extent to which the flap can rise.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. In a flushing cistern of the type herein referred to, the means for imparting
the vertical movement to the lifter substantially as hereinbefore described with
reference to Figures 1, 2 and 3 of the accompanying drawings.
2. In a flushing cistern of the type herein referred to, the construction of the
lifter whereby the ordinary pivotal connection is dispensed with substantially as
herein before described with reference to Figures 4 to 7 of the accompanying
drawings.
Dated this 10th dow of November 1801
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicants.