US143390A - Improvement in gas-meters - Google Patents

Description

W. A. TELLING 81. S. JOHNSON.

'Gas Meters.

Fig.2.

Patented September 30,1873

Fig-.3.

. 22 2 am a INVENTORS:

WITNESSES:

J m/pr UNITED STATES PATENT OFFICE.

WILLIAM TELLING AND SAMUEL JOHNSON, OF WOOD GREEN, LON- DON, ASSIGNORS TO THE IMPERIAL METER COMPANY, OF LONDON,

ENGLAND.

IMPROVEMENT IN GAS-METERS.

Specification forming part of Letters Patent No. [43,390, dated September 30, 1873; application filed July 7,1873.

To all whom it may concern Be it known that we, WILLIAM ALFRED TELLING and SAMUEL JoHNsoN, both of Wood Green, London, England, have invented Improvements in Gas-Meters; and we do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing making part'of this specification, in which Figure 1 is a longitudinal section of a gasmeter embodying our invention. Fig. 2 is a transverse section, and Fig. 3 a horizontal section, of the same. Fig. 4 is a transverse section of part of the meter, through the slidevalve by which the passage of the gas is regulated.

Similar letters of reference indicate corresponding parts in the several figures.

This invention relates to novel improvements in that form of gas-meter known as the dry meter, in which the quantity of gas passing through it is measured by the alternate expansion and contraction of a flexible diaphragm formed of thin leather or other suitable material. The objects of our invention are to simplify the construction of such gas-meters, to apply a balance-weight to the flexible diaphragm, bymeans of which the flow of gas is rendered more equable, to reduce the friction upon the parts of the apparatus which drive the regulating-valve and the registering apparatus.

In the accompanying drawing, a represents the body of a meter, divided by the plate 1) into the .upper part c and the lower part (I, and the part 61 is itself divided into two parts (which may be equal or unequal) by the plate 0, to which the edge of thefiexible diaphragm or bag f, Fig. 2, is attached. The vertical wire or spindle d is connected to the diaphragm f by means of connecting-links between the arm hand the plate i, and its upper part passes through the stuffing-box k in the plate I), and carries the arm Z, at the end of which is fixed the screw n, upon which the pins m m are adjusted. These pins maybe fitted with frictionrollers, preferably of glass. The rocking-shaft 0 carries the weighted lever 10, which is thrown over from side to side by the pins m m as they travel backward and forward by the movement of the diaphragm f. The part of the weighted lever 10 which is struck by the pins is made of a curved or cycloidal shape, as

shown at a, Fig. 2, in order to reduce its down ward pressure upon the pins m m. One end of the rocking-shaft 0 passes through the stuffing-box 8 into the separate chamber t, to which municate, respectively, with the two parts into which the meter is divided by the plate 6 and the diaphragm f, and the gas is admitted into them alternately by the action of the slidevalve. The stroke of the valve w is limited by the stops 1 2, and the movement of the weighted lever 10 is limited by the stops 3 and 4 and the buffer F. In the lower part of the meter G, I t

Fig. 2, is a weightedbalance-lever turning upon a center, H, and connected to the plate c, and the diaphragm f by the link K. L is an arm or lever fixed upon the wire or spindle g, and connected by the rod M to the pallet N, which oscillates upon the center 0, and at each oscillation in either direction drives forward the pallet-wheel P, by which are driven the indices of the registering apparatus, (not shown in the drawing,) but which may be constructed in the usual manner.

The operation of the gas-meter is as follows: The gas is admitted from the inlet-pipe 1; into the valve-chamber t, whence, by the action of the valve w, it is admitted to either side of the diaphragm f alternately, and thus drives the diaphragm, and the plate iwhich covers it, from side to side, the gas being forced during each return stroke of the diaphragm back through the valve w and the passage A to the outlet-pipe G. The vertical cranked wire 9 being connected to the diaphragm by means of the arm h is made to make a partial revolution at each stroke of the diaphragm, andthe lever Z fixed upon its upper end thus carries backward and forward the pins m m, which strike the weighted lever 19. When the diaphragm f is traveling in the direction shown by the arrow in Fig. 2, the pressure of the gas has not only to move the diaphragm, but also to lift the weighted balance-lever G, which is so adjusted that it has reached its highest point at the moment when the pin m strikes the weighted lever 12, and by its subsequent descent it aids the pressure of the gas to lift the latter. The pins m m are so adjusted that the weighted lever 19 falls over and instantaneously reverses the action of the valve at the moment when the diaphragm has traveled sufficiently far to measure the exact quantity of gas required. It then instantly commences its return stroke, during which it has to lift the weighted leverv G, which falls over at the moment that the pin m commences to lift the lever 19. The movement of the diaphragm is thus continuous and equable, and the steadiness of the escaping gas is not effected by the sudden reversal of its movements. The cycloidal curve 0" upon the lever 19 reduces the friction of the pins m m upon it. The action of the lever N upon the pallet-wheel P, by movin g the latter forward at each oscillation of the diaphragm in either direction, reduces thefriction required to drive the registering apparatus.

Having now described our invention, what we claim as new, is

1. The combination, with the diaphragm in a dry gas-meter, of the weighted balance-lever G, arranged so that it assists in lifting the weighted lever 19 used for reversing the slidevalve w, and thus renders the action of the diaphragm continuous and equable, substantially as described and shown in the drawing. 2. The combination, with the pins m m driven by the diaphragm, of the curved or cycloidal-shaped weighted lever which drives the slide-valve w, so that the downward pressure upon the pins is reduced, substantially as described and shown in the drawing. In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

WILLIAM ALFRED TELLING.

SAMUEL JOHNSON.

Witnesses:

EDMUND EDWARD, CHARLES JAMES WINTERSGILL.

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