IMPROVEMENTS IN THE CONSTRUCTION OF DRY GAS METERS."
Year: 1871

page_text: LETTERS PATENT to William Alfred Telling, Gas Meter Maker, of
49, Wellgate, Rotherham, in the County of York, and Samuel
Johnson, Draughtsman, of 18, Clifton Bank, Rotherham, in the_
County of York, for the Invention of "IMPROVEMENTS IN THE
CONSTRUCTION OF DRY GAS METERS."
PROVISIONAL SPECIFICATION left by the said William Alfred Telling
and Samuel Johnson at the Office of the Commissioners of Patents,
with their Petition, on the 22nd February 1871.
WC, WILLIAM Alfred Telling, Gas Meter Maker, of 49, Wellgate,
Rotherham, in the County of York, and SAMUEL JOHNSON, Draughts-
man, of 18, Clifton Bank, Rotherham, in the County of York, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN THE
CONSTRUCTION OF DRY GAS METERS," to be as follows:-
Our improved meter consists of a case divided into an upper and a
lower compartiment by a horizontal partition, the lower compartment
containing a leather diaphragm and the flag wire and its attachments, the

page_text: upper compartment containing a slide valve. A horizontal rocking shaft
extends from the inlet to the outlet sides of the meter, having at the
valve or inlet end a bent arm fixed to it directly over the centre of the
valve cover. In the centre of the said rocking shaft is a weighted arm,
and midway between this weighted arm and the end of the rocking shaft
at the outlet end of the meter is a catch; in the upper compartment
there is also an arm fixed to the top of the flag wire, having at its end
furthest from the flag wire an adjusting arm with two moveable adjusting
pins.
The operation is as follows:-When the gas enters the lower compart-
ment, supposing the diaphragm to be at its full extent backward, and
the gas to be admitted behind it, the said diaphragm, by the pressure of
the gas is urged forward and its movement is transmitted to the upper
compartment in the usual manner by a flag wire. It is evident that as
the adjusting arm is fixed to the flag wire it moves simultaneously in
the same direction as the diaphragm, and as the adjusting pins on the
adjusting arm are so placed as to alternately come in contact with the
said weighted arm on the rocking shaft, the back adjusting pin on
the adjusting arm in its forward movement coming in contact with the
weighted arm (which is at a right angle with the rocking shaft) gives to
it, the aforesaid weighted arm, a forward and an upward movement, until,
passing its centre of gravity, the said weighted arm falls and at once
reverses the valve by one end of the bent arm coming in contact with an
upright piu on the cover of the valve, thereby admitting the gas upon the
front of the diaphragm, and also by means of the catch before mentioned,
which works into a toothed wheel of the index, recording upon the dial
the quantity of gas passed and measured by the diaphragm. The weighted
arm is prevented from falling too far by a stop attached to the rocking
shaft
SPECIFICATION in pursuance of the conditions of the Letters Patent, 30
filed by the said William Alfred Telling and Samuel Johnson in the
Great Seal Patent Office on the 22nd August 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, WILLIAM
ALFRED TELLING, Gas Meter Maker, of 49, Wellgate, Rotherham, in
the County of York, and SAMUEL Jonsson, Draughtsman, of 18, Clifton 35
Bank, Rotherham, in the County of York, send greeting.

page_text: WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-second day of February, in the
year of our Lord One thousand eight hundred and seventy-one, in the
thirty-fourth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto us, the said William Alfred Telling and
Samuel Jolinson, Her special licence that we, the said William Alfred
Telling and Samuel Johnson, our executors, administrators, and assigns,
or such others as we, the said William Alfred Telling and Samuel
Johnson, our executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times there-
after 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 THE CONSTRUCTION OF DRY GAS METERS," upon the con-.
dition (amongst others) that we, the said William Alfred Telling and
Samuel Johnson, or one of us, our exccutors or administrators, by an
instrument in writing under our, or one of our, 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 we, the said William Alfred Telling and Samuel
Johnson, do hereby declare the nature of our said Invention, and in what
manner the same is to be performed, to be particularly described and
ascertained in and by the following statement thereof, reference being
had to the Drawings hereunto annexed, that is to say :-
The meter is constructed in the following manner :-A case A,
Figs. 1, 2, & 3, is divided into upper and lower compartments B, B,
by a horizontal partition O; the lower compartment contains a leather
diaphragm D, and the flag wire E, and its attachments F, while the
upper compartment contains a slide valve G; a horizontal rocking
shaft II extends from the inlet to the outlet sides of the meter, having
at the valve or inlet end a bent arm I fixed to it directly over the centro
of the valve cover; in or about the centre of the said rocking shaft is a
weighted arm J, and between this weighted arm and the end of the
rocking shaft is a catch K; in the upper compartment there is also an
arm L fixed to the top of the flag wire, which has at its end furthest
!

page_text: from the flag wire an adjusting arm M with two movable adjusting
pins N, N.
The operation is as follows:-When the gas enters the lower com-
partment, supposing the diaphragm to bo at its full extent backward,
and the gas being admitted behind it, the said diaphragm, by the
pressure of the gas, is urged forward, and its movement is transmitted
to the mechanism in the upper compartment in the usual manner by a
flag wire. It is evident that as the adjusting arm is fixed to the flag
wire it moves simultaneously in the same direction as the diaphragm,
and as the adjusting pins on the adjusting arm are so placed as to
alternately come in contact with the said weighted arm on the rocking
shaft, the back adjusting pin on the adjusting arm in its forward
movement coming in contact with the weighted arm (which is at a right
angle with the rocking shaft) gives to it the aforesaid weighted arm a
forward and an upward movement until passing its centre of gravity the 1
said weighted arm falls and at once reverses the valve by one end of the
beut arm coming in contact with an upright pin ○ on the cover of the
valve, thereby admitting the gas upon the front of the diaphragm, and
also by means of the catch before mentioned which works into a toothed
wheel of the index, recording upon the dial the quantity of gas passed
and measured by the diaphragm. The weighted arm is prevented from
falling too far by a stop P attached to the rocking shaft striking alter-
nately against the pillars Q, Q.
And having now described the nature of our said Invention, and in
what manner the same is to be performed, wo declare that we claim the
construction of dry gas meters in which the before-mentioned arrange-
ment of nicchanism for registering the quantity of gas flowing through
it is applied as described and shown.
In witness whereof, we, the said William Alfred Telling and Samuel
Johnson, have hereunto set our hands and seals, this Twenty-
first day of August One thousand eight hundred and seventy-
ouc.
W. A. TELLING.
(L.S.)
SAML. JOHNSON. (L.S.)