Year: 1897

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 11 of the Patents, &c. Act, 1883) as required by
the decision of the Comptroller General of the 24th day of August 1898.
I, HUGH MORTON CRAIG, of the Firm of Messrs. J. & M. Craig Limited of
Kilmarnock, Ayrshire, Fire Clay Manufacturers, do hereby declare the nature of
this invention to be as follows:-
This invention which relates to syphon water closets has for its object to ensure
the readier starting of the syphonic action which occurs in the discharge of the
contents of the closet through the syphon leg attached to the usual trap bend
attached to the closet well.
To that end I contract the upper end of the long leg of the syphon just below
the point of its junction to the upper end of the trap or discharge
outlet of the closet by narrowing or converging the sides of the
passage, and below the contracted or narrowed part I gradaually
widen the syphon leg to its original diameter when it is again narrowed or con-
tracted at the lower end of the syphon leg to which the soil pipe is connected.
The double contracting of the syphon leg in this manner causes quick and com-
plete syphonage, and is believed to be due to the upper contraction impeding
the outward rush of water and causing it to accumulate in the upper part of the
syphon pipe and thus expelling the air from the top bend of the trap, which air
is immediately replaced by water when syphonage takes place. The bottom
contraction again concentrates the discharge of water giving increased drawing
power.
Tate th: 14th
100%
Dated this 14th
day of April 1907.
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agent, 62, Saint Vincent Street, Glasgow,
Agent for the Applicant.

page_text: 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 which relates to syphon water closets has for its object to ensure
the readier starting of the syphonic action which occurs in the discharge of the
contents of the closet through the syphon leg attached to the usual trap bend
attached to the closet well.
The invention is illustrated by the accompanying drawings in which Figure 1
représents my invention as applied to a wash-out closet and Figure 2 shows it
applied to a wash-down closet. As shown by these drawings the upper end of
the long leg A of the syphon is contracted just below the wier, i.e. the point of
its junction to the upper end of the trap or discharge outlet B of the closet C by
narrowing or converging the sides of the passage as at 1, and it is again narrowed
or contracted at the lower end of the syphon leg to which the soil pipe
nected, the portion E between the contracted orifices D, F, not exceeding in
diameter the otherwise practically uniform bore of the syphon.
con-
The double contracting of the syphon leg A in this manner causes quick and
complete syphonage due to the upper contraction D impeding the outward rush
of water and causing it to accumulate in the upper part of the syphon pipe and
thus expelling the air from the top bend of the trap, which air is immediately
replaced by water when syphonage takes place. The bottom contraction F again
concentrates the discharge of water giving increased drawing power.
Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed, I wish it to be under-
stood that I am aware of Letters Patent No. 23413 of 1892 granted to John
Shanks and that I claim nothing described and claimed in the Specification of
said Letters Patent, but what I do claim is:-
A syphon water closet in which the long leg of the syphon is formed with a
contracted orifice near its upper end below the weir and a like contraction at
its lower end where it joins the soil pipe in order to effect ready starting and com-
plete syphonage of the contents of the closet.
Dated this 19th day of Tanu 1898
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agent, 62, Saint Vincent Street, Glasgow,
Agent for the Applicant.