IMPROVEMENTS IN WATER METERS
Year: 1882

page_text: "
COMPLETE SPECIFICATION filed by the said Brierley Denham Healey at the
Office of the Commissioners of Patents on the 23rd May 1882.
BRIERLEY DENHAM HEALEY of Brighouse, in the County of York, Civil Engineer,
IMPROVEMENTS IN WATER METERS."
This Invention has reference to meters used for measuring water, which are
known as possitive piston meters, and is an improvement upon the meter for which
Letters patent were granted to me A.D. 1881. No. 2081.
According to my present Invention the piston carries only one roller ring, or
instead thereof it may have ordinary cup or L leathers in vulcanite or other
suitable cups. The length of the piston is equal to about half the diameter of the
cylinder, and the extreme ends or flanges have very little play. When leathers are
used they are fixed in the centre of the piston, divided only by a metal or vulcanite
disc, and fitted with a suitable cup or guide above and below.
At each end of the piston there is a tappet in the centre, which actuates suitable
levers within the cylinder covers, and these levers reverse the position of the change
valve; and the water from the latter acting upon small pistons at each end of the
main valve, causes the main valve to change position and give water to the
cylinder.
And in order that my Invention may be better understood I will now describe it
with reference to the two sheets of drawings which accompany this Specification,
using the same letters of reference for like or similar parts shewn on different
Figures.
Figure 1 is a vertical section, the upper part being on line 5, 6. 7, and the lower
part on line 5, 6. 8. Figure 2 is a section on line 1, 2, and figure 3 is a section on
line 3, 4. Figure 4 is an elevation shewing the valve seatings and water passages,
the valve box cover being removed.
The piston A is shewn nearly at the upper end of its stroke, one of the tappets
is acting on the lever B, and the change valve spindle C is being pushed

page_text: downwards. On opening the port E, the water flowing through E¹. reverses the
main valve D' by acting on the small piston at the upper end of spindle D.
Water then enters the upper end of measuring cylinder, and as the main piston
approaches the lower end of the measuring cylinder, the lever B¹. causes the valve
C. to rise, and the main valve.D. is then driven upwards by water from change
valve acting on its lower piston D2, now admitting water to the lower end of
measuring cylinder through F, until the various parts are brought again into the
position shewn in figure 1. Water from the service pipes enters the meter valve
box at G, and the measured water escapes at G¹.
The main valve spindle D carries a small piston in a brass lined chamber at
each end, and the main valve D'. in the centre of valve box. The change valve
spindle C works in glands at each end, but the lower gland may be fixed in lower
part of valve box instead of at lower end. Both the slide valves work upon the
same brass seating but at slightly different angles in cross section as shewn on
figure 3.
The index gearing may be actuated in any well known manner by the
main piston, and generally fixed at the upper end of cylinder as indicated by H on
figures and 2.
The apparatus may be placed vertically as shewn on Drawings hereunto annexed
or horizontally, and the valves may be actuated by india rubber ball valves in the
centre of each cover of cylinder (by means of tappets) instead of the levers, the
action under this modification being that when the tappet presses one of the rubber
valves the exhaust end of cylinder is then opened to one end of the change valve
and the other rubber valve is opened by pressure from cylinder, so that the change
valve is moved, the change valve in this case being a double D valve and carrying
small pistons at each end similar to the main valve.
Having now described my said Invention and the manner I carry the same into
effect, I wish it to be understood that I do not claim any of the well known parts
shewn on the accompanying Drawings, but what I claim as my Invention is :-
The construction of water meters with arrangements for reversing the valves as
shewn and described herein or any mere modification thereof.
In witness whereof I, the said Brierley Denham Healey have hereunto set my
hand and seal this twentieth day of May in the year of our Lord one
thousand eight hundred and eighty two.