IMPROVEMENTS IN FOUR-WAY VALVE APPARATUS
Year: 1870

page_text: LETTERS PATENT to John Robb, of No. 19, Clark Street, Stepney, in
the County of Middlesex, for the Invention of "IMPROVEMENTS IN
FOUR-WAY VALVE APPARATUS.”
Sealed the 26th May 1871, and dated the 3rd December 1870.
PROVISIONAL SPECIFICATION left by the said John Robb at the
Office of the Commissioners of Patents, with his Petition, on the
3rd December 1870.
I, JOHN ROBB, of No. 19, Clark Street, Stepney, in the County of
Middlesex, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN FOUR-WAY VALVE APPARATUS," to be as follows:-
According to my improvements there are two valves to the four ways.
Each valve moves on hinge joint and is packed on its opposite sides,
so that each side may fit to a seat provided for it. The valves are
capable of simultaneous movement by being connected through links
or other suitable connecting means to arms from an axis which passes
through a stuffing box and is worked by an arm thereon carrying a

page_text: segment of teeth taking into a worm or screw or by other suitable
means. By these means facility is afforded for direct passage through
each valve in either direction to the respective ways.
The surfaces of the valves are packed with wood or other suitable
material according to the purpose to which the valve apparatus is
to be applied, and such apparatus is particularly applicable as a by-pass
valve at gas works and other places.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Robb in the Great Seal. Patent Office on the
2nd June 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
ROBB, of No. 19, Clark Street, Stepney, in the County of Middlesex,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Third day of December, in the year
of our Lord One thousand eight hundred and seventy, in the thirty-
fourth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said John Robb, Her special licence that I,
the said John Robb, my executors, administrators, and assigns, or
such others as I, the said John Robb, executors, administrators,
and assigns, should at any time agree with, and no others, from time to
time and at all times thereafter during the term therein expressed,
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for "IMPROVEMENTS IN FOUR-WAY VALVE
APPARATUS," upon the condition (amongst others) that I, the said
John Robb, my executors or administrators, by an instrument in
writing under my, or their, or one of their hands and seals, should
particularly describe and ascertain the nature of the said Invention,
and in what manner the same was to be performed, and cause the
same to be filed in the Great Seal Patent Office within six calendar
months next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said John Robb, do hereby declare
the nature of the said Invention, and in what manner the same is to

page_text: valves so that they may cover the passages a* and a³, the ways will be
by a¹ to a², and by a³ to a². In order to obtain a correct adjustment of
the valves to their seats one of them is connected to its arm c with
adjusting nuts c³, c³, as shewn.
As indicated by these Drawings movement is obtained to the axis c¹
to change the relative position of the valves by means of the screw
shaft d which is supported to turn in bearings e, e, and is provided
with a handle wheel d¹ by which it may be turned, and it has formed
on it a screw d³ which receives the teeth of a segment faffixed on the
axis c¹.
Figure 5 shews a horizontal section, and Figure 6 a vertical section
of a slight modification of the above, in which the two valves b, b, turn
on centres b³, 6³, and the arms c, c, pass through loops or links b³ formed
for them on the valves b. This arrangement in other respects is similar
to that before described.
Having thus described my Invention and means which I adopt in
carrying the same into effect, I would have it understood that I do not
confine myself to the precise arrangements of parts as shewn and
described, as the same may be varied without departing from the
peculiar character of my Invention; but what I claim is, the arranging
four-way valve apparatus so that simultaneous movement may be
obtained to the valves thereof, substantially as described.
In witness whereof, I, the said John Robb, have hereunto set my
hand and seal, this Second day of June, in the year of our Lord
One thousand eight hundred and seventy-one.