An Improved Silent Water Waste Preventer Cistern.
Year: 1887

page_text: Date of Application, 12th Nov., 1887
Complete Left, 15th Dec., 1887
Complete Accepted, 17th Feb., 1888
PROVISIONAL SPECIFICATION.
An Improved Silent Water Waste Preventer Cistern.
THOMAS WATERS LETHEREN Hot Water Engineer Plumber & Gas fitter,
31 Magdalen Street, Exeter, Devonshire, I do hereby declare the nature of this
invention to be as follows:-
An Iron Tank in which is fixed a Syphon. And a combination of an ordinary
Ball Cock and Float the Float or ball being of such dementions that being pulled
under the Water in the Cystern the Water is raised above the top of Syphon
& the Water rushes out of Syphon. The Silent and the after Flush claimed for is
caused by means of an air pipes or air inlet from any convienent distance from the
Top of Syphon by which means the Syphon is silently & gradually discharged after
the level of the water has been reached as may be required. The above Cystern may
be applied to any Water Coset.
:
Dated this 11th day of November 1887.

page_text: COMPLETE SPECIFICATION.
An Improved Silent Water Waste Preventer Cistern.
I THOMAS WATERS LETHEREN of Number 31 Magdalen Street Exeter Hot Water
Engineer Plumber and Gas Fitter do hereby declaro 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 :-
The object of my Invention is by means of a combination of a Valve and Lever
and a Drum or any other shaped Float to raise the Water in a Cistern or Tank over
and into a syphon and thence into the Pan of a Closet or other receptacle below and
by means of inlets of air into the syphon or Flow Pipe by Pipes or otherwise to cause
a silent discharge of the Water and either a gradual or rapid but in either case silent
after flush of the Water into such Pan or receptacle as aforesaid. In the event of
Air Pipes being used the after flush could be regulated by means of Cocks fixed in
uch Air Pipes.
According to my invention I provide a Valve combined with a Lever and a Drum
or any other shaped Float and a pipe or syphon with air inlets all of which are
fixed in a Tank or Cistern used for the purpose of discharging water or to the Flow
pipe from a Syphon. The Air Pipes before referred to being preferably of syphon
form. By depressing the Lever of the Float by means of a Chain or Wire the Water
is raised over and into the Syphon which thereupon commences to discharge the
Water in the Tank or Cistern through such Syphon.
In connection with the Syphon are air inlets which have the effect of causing the
Syphon to silently discharge the Water and in the event of the air being admitted
by means of pipes the pace of the after flush of water can be regulated by the Cocks
before mentioned fixed in the Air pipes.
My invention applies to the effect produced by the combination of the Valve Lever
and Float and to the introduction of inlets for air into the Syphon and Flow Pipe
preferably by Syphon or any other formed air inlets.
In the accompanying Diagram the Tank or Cistern is distinguished by the letter A.
The Syphon B. The Lever C. The Float D. The valve E. The Air Pipes or
Inlets F and G and the regulating Cock H.
Having now particularly described and ascertained the nature of my said Invention
and in what manner the same is to be performed I declare that what I claim is :-
1. As an invention or improvement the combination of the Valve Lever and
Float whereby by means of a Chain or Wire or other means attached to the
Lever of the Float and by pulling the said Chain or Wire the Water in the
Tank or Cistern is forced into the Syphon.
2. As a new Invention the admission of air into the Syphon and Flow pipe
(by means of pipes and regulating Cocks preferred) whereby a silent discharge of

page_text: the water is effected as well as a gradual or rapid but in either case silent after
flush the silence being caused in consequence of the Water being discharged
through the Syphon by the aid of one of the air inlets (F) and thence through
the flow pipe by aid of the other air inlet (G) thereby preventing any gurgling
or other noise which. there would be if the Syphon wer allowed to discharge
itself without the aid of the air inlets. The air may he admitted into the Syphon
and Flow Pipe respectively by other means than those of pipes but I claim as
part of my invention the introduction by any means whatsoever of air in silently
discharging the Water from a Tank or Cistern through a Syphon.
Dated this Fourteenth day of December 1887.
THOMAS WATERS LETHEREN.