US972156A

US972156A - Port-plate for rotary meters.

Info

Publication number: US972156A
Application number: US53475309A
Authority: US
Inventors: Ernest C Brown
Original assignee: ROTARY METER Co
Current assignee: ROTARY METER Co
Priority date: 1909-12-24
Filing date: 1909-12-24
Publication date: 1910-10-11
Anticipated expiration: 1927-10-11

Description

E. 0. BROWN. PORT PLATE FOR ROTARY METERS.

APPLICATION FILED DEC]. 24, 1909.

' 972,156. Patented 0ct. 11,1910.

'Fi g4 INVENTOR EL. BfiUW/V.

ATT' M In: NORRIS PETERS cm, wasnmmou, 04 c.

UNITED STATES PATENT OFFICE.

ERNEST C. BROWN, OF NEW YORK, N. Y., ASSIGNOR T0 ROTARY METER COMPANY, A

CORPORATION OF NEW YORK.

PORT-PLATE FOR ROTARY METERS.

' Specification of Letters Patent.

Application filed December 24, 1909.

Patented Oct. 11, 1910.

Serial No. 534,753.

To all whom it may concern:

Be it known that I, ERNEST C. BROWN, a citizen of the United States, and a resident of the borough of Manhattan, county, city, and State of New York, have invented certain new and useful Improvements in Port- Plates for Rotary Meters, as set forth in the following specification.

This invention relates to an improvement in the construction of rotary gas meters of the turbine type. In meters of this type the gas is caused to flow through a plurality of ports, the ducts through which direct their individual blasts of gas against the blades of a vane, thereby causing it to rotate. EX- perience has taught that the liquid substances of a more or less tarry nature which are condensed out of or are carried along by many kinds of gas, as for instance illuminating gas, are apt to interfere with the proper operation of a meter of the type described. If this tarry liquid is forced through the ports and allowed to collect on the port plate beneath the vane it is many times merely a matter of time before many of the operating parts of the meter become clogged by the presence of this gummy substance.

An object of the present invention is to eliminate the dangers and inaccuracies heretofore attributable to the clogging by liquid in the gas being metered.

To this end the invention contemplates the construction of a novel port plate which shall be self draining and so constructed as to prevent the scattering of any liquid which may be dragged through the ports.

In the embodiment illustrated the port plate comprises a metallic disk provided with a seating flange at its outer rim; having a depressed trough-like drip ledge at its interior portion; an intermediate portion downwardly dished from the seating flange to the drip ledge; and having tubular ports arranged vertically through the dished portion, arranged in concentric circles and terminating in two horizontal planes one above and one below the port plate. The troughlike drip ledge is provided with drainage openings which may be provided with trap tubes to prevent the leakage of gas.

The above and further objects of this invention will be pointed out more in detail in the accompanying claims and will be apparent from the following specification when read in connection with the accompanying drawings which form part of this application, and in which,

Figure 1 is a vertical section through the port plate showing the cooperating parts of a rotary meter construction; Fig. 2 is a view similar to Fig. 1 showing a slight modification of the port plate; and Fig. 3 is a plan View of the port plate of Fig. 2 drawn to a reduced scale.

Referring now more in detail to the drawings, 1 indicates the casing of a rotary meter, the inlet duct for which is indicated by 2 and the outlet duct for which is indicated by 3, whereby the gas to be metered is caused to traverse in the general direction of the arrows from the inlet duct 2 through the ducts 4 of the ports 5 against the blades 6 of the vane 7 and thence through the outlet duct 8.

In the construction shown walls 8 and 9 and the vertically arranged cylindrical casing 10 form a part of the partition between the inlet 2 and the outlet 3. This partition may be completed by the port plate 11.

In the construction shown in Fig. 1 the port plate 11 comprises a metallic disk having a circular seating flange 12 rabbeted to make a gas tight lit with the top rim of cylinder 10 and whereby the port plate is supported in horizontal position. The port plate is also provided with a depressed inner drip ledge 13, which is shown in the form of an annular trough. The portion of the port plate intermediate the ledge 13 and the seat ing flange 12 is downwardly dished with a varying pitch and comprises a downwardly dished portion 14 of gentle pitch continuing into a dished portion 15 of steeper pitch which terminates in the ledge 18. The ledge 13 is provided with one or more drainage openings 16. In the construction shown in Fig. 1 the port plate is shown provided with a central opening 17 which is closed by the cap 18 of a shell 19, the flanges 20 of the cap resting upon the inner elevated rim 21 of the ledge 13. In this construction the cap 18 provides the lower bearing 22 forthe vertical spindle 23 of thevane 7 which is arranged to rotate upon a vertical axis concentric with the dished portions of the port plate 11.

In Fig. 2 the port plate 11 is modified in that the central opening is absent and the bearing 22 for the spindle 28 ofthe vane is provided upon a central disk shaped portion 24, formed as an integral part of the port plate construction, which may be a casting. The drainage opening 16 may be left as shown at the right of Fig. 2 or may be provided with means to prevent the leakage of gas therethrough. At the left of Fig. 2 a depending tube 25 is secured in the opening and its internal diameter is such that the duct therethrough will be substantially filled with the draining liquid to trap the upward progress of gas through the same.

In Fig. l the drainage openings 16 are shown each provided with a tube 26 having an upturned trapping portion 27. at its lower end to form a positive trap against the flow of'gas therethrough.

The port tubes 5 are so arranged as to form ducts 4 extending above and through the dished top surface of the port plate 11. These port tubes are shown as formed of short sections of uniform length of suitable tubing and are arranged in a plurality of rows concentric with the axis of the spindle 23 and concentric with the dishing of the port plate 11. These port tubes are also arranged so that they all terminate at their upper ends 28 in the same horizontal plane at a slight elevation above the outer rim 12 of the port plate and also extend below and terminate in a horizontal plane at a distance below the port plate.

With the construction described the depending port tubes 5 prevent any liquid which may have collected on the lower surface 29 of the port plate from passing through the ducts 4. Any liquid which may collect on the inner surface of the ducts and be dragged upwardly by the flowing gas flows over the top brims 28 of the port tubes 5', down upon the downwardly dished top surface of the port plate and thence down to the drip ledge 13,.fr0m which it is drained by openings 16. The steeper pitch of the portion 15 where the drainage surface is of a lesser radius than that of the portion 14c insures its satisfactory drainage and also provides that the outer rows of port tubes shall project downwardly a maximum distance below the port plate.

Although the port plate has been described as having two dished portions of different pitch it is to be understood that the invention contemplates a dished portion broadly which may be regarded as the two dished

portions

14 and 15 of different pitch or as either of them- It is also to be understood that the exact contour of the brim of the port plate is immaterial as itis merely necessary that it should conform to the structural conditions of the meter construction in which it is employed.

lVhat is claimed and what is desired to be secured by United States Letters Patent is 1. A port plate for rotary meters comprising a circular member having an outer seating flange and a portion having an annular downwardly dished top surface with ports opening through said dished top surface.

2. A port plate arranged to be supported horizontally and comprising a disk having a depressed drip ledge and top surface downwardly dished from its outer rim to said depressed drip ledge, in combination with a plurality of port tubes extending through and above said dished surface and providing ducts through said plate.

3. A port plate arranged to be supported horizontally and comprising a disk having a depressed drip ledge and top surface downwardly dished from its outer rim to said depressed drip ledge, in combination with a plurality of port tubes extending through and above said dished surface and providing ducts through said plate, said port tubes being arranged vertically and spaced in concentric circles relatively to the dishing of said plate.

4:. In combination in a rotary meter, a rotatable vane journaled on a vertical axis; a port plate mounted horizontally below said vane and having its upper surface centrally and downwardly dished concentrically with said vertical axis; and a plurality of port tubes extending upwardly from said dished port plate toward said vane.

5. Aport plate for rotary meters having a circular downwardly and centrally dished portion and port tubes projecting above and below said dished portion and providing ducts through the said dished portion.

6. A port plate for rotary meters having a circular downwardly and centrally dished portion and ort tubes projecting above and below said dished portion and providing ducts through the said dished portion, all of said port tubes terminating in the same plane above the said dished portion.

7. A port plate for rotary meters having a circular downwardly and centrally dishcd portion and port tubes projecting above and below said dished ortion and providing ducts through the said dished portion, all of said port tubes terminating in the same planes above and below the said dished portion.

8. A port plate for rotary meters having a circular downwardly and centrally dished portion and port tubes projecting above and below said dished portion and providing ducts through the said dished portion, said dished portion terminating in a depressed trough shaped drip ledge having one or more drainage openings.

9. A port plate for rotary meters having a circular downwardly and centrally dished portion and port tubes projecting above and below said dished portion and providing ducts through the said dished portion, said dished portion terminating in a depressed trough shaped drip ledge having one or more drainage openings; and means for preventing the leakage of gas through said drainage openings.

10. A port plate for rotary meters having a circular downwardly and centrally dished portion and port tubes projecting above and below said dished portion and providing ducts through the said dished portion, said dished portion terminating in a depressed trough shaped drip ledge having one or more drainage openings; and means for preventing the leakage of gas through said drainage openings comprising depending trap tubes.

11. A port plate for rotary meters having a circular downwardly and centrally dished portion of downwardly increasing pitch and port tubes projecting above and below said dished portion and providing ducts through the said dished portion.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

ERNEST C. BROWN.

WVitnesses CHRISTINE E. HANSELMANN, LEONARD DAY.