IMPROVEMENTS IN GAS GOVERNORS
Year: 1869

page_text: LETTERS PATENT to Richard Broadbent, of 11, Islington, Birming-
ham, in the County of Warwick, Gas Engineer, for the Invention
of "IMPROVEMENTS IN GAS GOVERNORS."
Sealed the 1st April 1870, and dated the 2nd October 1869.
PROVISIONAL, SPECIFICATION left by the said Richard Broadbent at
the Office of the Commissioners of Patents, with his Petition, on
the 2nd October 1869.
I, RICHARD BROADBENT, of 11, Islington, Birmingham, in the County,
of Warwick, Gas Engineer, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN GAS GOVERNORS," to be as follows:-
My first improvement consists in providing a seating for the valve to
act against, the seating. being, composed of Tangye's Patent metal.. The
introduction of the seating into gas governors ensures the valve securely
closing the opening when it touches it; it also provides. against the
corrosion of the metal at that part.
In order to prevent the vibration of the valve and the disc or dia-
phragm when there is an excessive pressure of gas I fit a spiral spring:

page_text: on the top of the diaphragm to counteract the effects of the vibration
or dithering. The spiral spring is weighted to overcome the tendency
to the tremulous motion of the disc & valve. In lieu of the spring I
sometimes employ a rod with a curved end; the rod is secured on a
cross bar or spindle, one end of which passes into a hole in one cheek of
the box, while the other rests in a notch on the other side of the box.
I fit a balance wheel on one end of the spindle to act as a check weight.
to the motion of the disc. There is another rod projecting from the
spindle, on which a weight is set and secured to give the proper adjust-
ment to the governor.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Richard Broadbent in the Great Seal Patent Office
on the 2nd April 1870..
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
BROADBENT, of 11, Islington, Birmingham, in the County of Warwick,
Gas Engineer, send greeting:
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Second day of October, in the year
of our Lord One thousand eight hundred and sixty-nine, in the thirty-
third year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Richard Broadbent, Her special licence
that I, the said Richard Broadbent, my executors, administrators,
and assigns, or such others as I, the said Richard Broadbent, my
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
GAS GOVERNORS," upon the condition (amongst others) that I, the said
Richard Broadbent, 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.

page_text: NOW KNOW YE, that I, the said Richard Broadbent, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and by
the following statement:―
My first improvement consists in providing a seating for the valve to
act against, the seating being composed of Tangye's Patent metal. The
introduction of the seating into gas governors ensures the valve securely
closing the opening when it touches it; it also provides against the
corosion of the metal at that part.
In order to prevent the vibration of the valve and the disc or dia-
phraym when there is an excessive presure of gas I fit a spiral spring
on the top of the diaphraym to counteract the effect of the vibration
or dithering. The spiral spring is weighted to overcome the tendency
to the tremulous motion of the disc and valve. In lieu of the spring I
sometimes employ a rod with a curved end; the rod is secured on a
cross bar or spindle, one end of which passes into a hole in one cheek of
the box, while the other rests in a notch on the other side of the box.
I fit a balance wheel on one end of the spindle to act as a check weight
to the motion of the disc. There is another rod projecting from the
spindle, on which a weight is set and secured to give the proper adjust-
CARAMAN

page_text: is open at the top, and is covered by the cover D working on centres
at E, it (D) being sealed by mercury with which the trough K is
supplied; F is the valve spindle with a screw thread cut on it and with
nuts M, M³, by means of which the valve may be adjusted as required.
The outlet for gas from the regulator is at H. A hole with a plug
should be provided at L for letting off any surplus quantity of mercury,
and also for running off condensed liquid from the pipes. I is the
valve seating of Tangye's Patent metal; N is a rod curved at one end
resting on the cover D, and is fixed at the other end to a spindle O
supported by the sides of the box. There is another rod P projecting 1
from the spindle turned up at one end, on to which a weight R should
be placed to give the proper adjustment to the governor'; S is a balance
wheel fitted on one end of the spindle to act as a cheque weight to the:
motion of the disc.
I hereby declare that I claim the Invention of "improvements in 1
gas governors herein described and illustrated by the accompanying
Drawings, it being understood that I do not limit myself to the precise
proportions and details illustrated by the Drawings, nor do I claim the
mere constituent details per se.
In witness whereof, I, the said Richard Broadbent, have here- 2
unto set my hand and seal, this 30th day of March, A.D. 1870.
Witness,
THO. STOREY,
King's Arms Hotel,
Kendal.
RP. BROADBENT. (L.S.)