IMPROVEMENTS IN PARTS OF Day Gas Meters
Year: 1873

page_text: LETTERS PATENT to John Glover, of No. 46, Seckforde Street,
Olerkenwell, in the County of Middlesos, for the Invention of
"IMPROVEMENTS IN PARTS OF Day Gas Meters.”
Scaled the 15th August 1873, and dated the 27th February 1873.
PROVISIONAL SPECIFICATION left by the said John Glover at the
Office of the Commissioners of Patents, with his Petition, on the
27th February 1873.
I, JOHN GLOVER, of No. 46, Seckfordo Street, Olerkenwell, in the
County of Middlesex, do hereby declare the nature of the said Invon.
tion for "IMPROVEMENTS IN PARTS OF DRY GAS METERS," to be as follows :—
In the arrangements as generally adopted for the passage of the gas
into and from the measuring compartments of dry gas meters sliding
valves aro employed, so arranged with the passages or gratings thereof
that the opening and closing of them takes place simultaneously tho
whole length of their passages, by which both the opening and closing
of such passages is sudden, often producing unsteadiness of the
lights.

page_text: The object of the Invention is to remedy this evil by obtaining a
gradual opening of the length of these passages or gratings. For this
purpose I form the openings or gratings across the valve seats in an
inclined direction, so that the flow of the gas into as well as from the
measuring compartments, as well as the closing of such passages,
commences at one end of the length of each opening, and progressively
along that sido, and so on until the passage is fully open or closed.
In place of the inclination being given to the openings or gratings in
the valve seats it may be given to the parts of the valves; and in place
of the sides of the passages in the seats or the parts of the valves. being
simply inclined in a direction from one end to the other a corresponding
effect may be obtained by the openings or parts of the valves to act
therewith being of a curved or other form admitting of the progressivo
opening and closing in the sliding motion of the valve.
SPECIFICATION in pursuance of the conditions of the Letters Patent, 1
filed by the said John Glover in the Great Scal Patent Office on
the 26th August 1878.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
GLOVER, of No. 46, Seckforde Street, Clerkenwell, in the County of
Middlesex, send greeting.
⚫ WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing dato the Twenty-seventh day of February, in tho
year of our Lord One thousand eight hundred and seventy-three, in the
thirty-sixth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said John Glover, Her special
license that I, the said John Glover, my executors, administrators,
and assigns, or such othors as I, the said John Glover, 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
PARTS OF DRY GAS METERS," upon the condition (amongst others) that I,
the said John Glover, my executors or administrators, by an instrument

page_text: 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
samo to be filed in the Great Seal Patent Offico within six calendar
months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said John Glover, do hereby declare
the nature of the said Invention, and in what manner the same is to bo
performed, to be particularly described and ascertained in and by the
following statement thereof, that is to say :—
In the arrangements as generally adopted for the passage of the gas
into and from the measuring compartments of dry gas meters sliding
valves are employed, so arranged with the passages or gratings thereof
that the opening and closing of them takes place simultaneously tho
whole length of their passages, by which both the opening and closing
of such passages is sudden, often producing unsteadiness of the
lights.
The object of the Invention is to remedy this evil by obtaining a
gradual opening of the length of these passages or gratings. For this
purpose I form the openings or gratings across the valve seats in an
inclined direction, so that the flow of the gas into as well as from the
measuring compartments, as well as the closing of such passages,
commences at one end of the length of oach opening, and progressively
along that side, and so on until the passage is fully open or closed.
In place of the inclination being given to the openings or gratings in
the valve seats it may be given to the parts of the valves; and in place
of the sides of the passages in the seats or the parts of the valves being
simply inclined in a direction from one end to the other a corresponding
effect may be obtained by the openings or parts of the valves to act
therewith being of a curved or other form admitting of the progressivo
opening, and closing in the sliding motion of the valve.
Having thus described my Invention, and means which I adopt in
carrying the same into effect, I would have it understood that what I
claim is, the forming the openings or the gratings of the valves of dry
gas meters in relation to the valves thereto, so as to admit of the pro-

page_text: gressive opening and closing of the valve passages, in manner sub-
stantially as described.
In witness whereof, I, the said John Glover, have hereunto set
my hand and seal, this Twenty-sixth day of August, in the
year of our Lord One thousand eight hundred and seventy-three. I