Improvements in Stop Indices for Prepayment Gas Meters.
Year: 1889

page_text: COMPLETE SPECIFICATION.
Improvements in Stop Indices for Prepayment Gas Meters.
I, WILLIAM ANDREW MCINTOSH VALON of the Gas Works, Ramsgate, in the County
of Kent Civil Engineer, do hereby declare the nature. of 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 is connected with one for which application for Letters Patent
No. 6431-89 has been made, and is for the same object, namely, to so construct gas
meter indices that immediately after a certain desired quantity of gas has passed
through the meter, the index, and consequently the meter, will stop and the supply
of gas to the fittings beyond will be cut off.
In order that this invention may be easily understood drawings are attached hereto,
Fig. 1 being a front elevation of a dry gas meter index. Fig. 2 is a part plan and
part sectional plan of the index when the meter is in action. Fig. 3 is a part plan and
section when the stop has taken effect. Fig. 4 is a part of front elevation, with the
dial plate removed and shows the worm and worm wheel and two front springs.
Fig. 5 exhibits the way in which the invention is applied to a wet meter.
To carry out this invention I fix to the arbor or spindle A a projecting pin C. A
disc D with a notch E (shown in the drawing in deep black) works loose upon the
spindle A which carries the registering pointer of the hundreds dial. A spring F is
attached to the back plate of the index to keep the spindle A in its place, and the
pin C in contact with the disc D. G is an arm with a pin H. This arm is pressed
against the disc B by a spring I, and when the arbor A and disc B have turned round
sufficiently the pin C is forced into the notch E by the action of the spring I, and
the pin H comes in contact with another pin J passed through the arbor K of the
units dial, thus stopping the meter. The stop pointer is adjusted by applying a key
to the square end of the shaft L of the worm M which gears into a worin wheel N.
This worm wheel is fixed to to the disc D, and also turns with it loosely on the
spindle A, so that by turning the key the position of the notch E and the stop
pointer O are made to coincide and point to the division on the dial at which it is
intended the registering pointer and meter shall stop. A spring ratchet presses against
the teeth of the worm wheel and prevents the stop pointer being turned backwards.
Having adjusted the stop pointer to the position required, the meter when put in
action will continue to go until the pin C is opposite the notch E when the former will
fall into the latter and allow the arm G to be pressed forward by the spring I. As
an additional security the pin H also comes in contact with the pin J, so as to
stop the further action of the meter, until the stop pointer has been re-adjusted.
The invention is applied to a wet ineter in the manner shown in Fig. 5, where A is
the spindle of the registering pointer of the hundreds dial. To this spindle the pin C
is fixed, D being the disc with notch E, while N is the worm wheel which is made to
revolve by the operator by means of a key applied to the square end of the shaft L
which carries a worm M. The disc D, wheel N, and ratchet wheel attached to D
revolve loosely on the spindle A, as in the dry gas meter index. Attached to the
worm wheel there is a ratchet wheel into which a long spring ratchet P catches so as
to prevent the stop pointer being made to go backwards. In addition to the
pin and notch E for stopping the meter, the upright shaft of the meter has a
pin thrust through it, and the ends of this pin act as a ratchet or catch by being
thrust into the teeth of the deeply cut ratchet wheel Q. The upright shaft, to save
confusion is not shown in the drawing.-A spring F is used to keep the pin (up to
the disc D.
The mode of adinsting the stop pointer is the same as before described.¨

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the saine is to be performed, I declare that what I
claim is,―
1. The construction of dry gas meter indices with a pin C, and disc D together
with a worm wheel N, and stop pointer O, as herein described and shown on the
drawings, Figs. 1, 2, 3 and 4.
2. The worin M, the disc B, the arm G with pins H and J as herein described and
shown on the drawings Figs. 2, 3 and 4.
3. The springs F and I and spring ratchet as herein described and shown on the
drawings Figs. 2, 3 and 4,—and
4. The construction of wet gas meter indices as herein described and shown on the
drawing Fig. 5.
1
1000
W. H. BENNETT,
Agent for the Applicant.