Ludlow Double Gate Valve.

The sectional view presented in this article is of the Ludlow double gate valve, which is built both of bronze and iron. By the action of the stem, which works through the bronze nut in the upper wedge, the gates descend parallel with their seats until the lower wedge strikes the stop (or boss) in the bottom of case —the gates and upper wedge continuing their downward movement until the face or bevel of upper wedge comes in contact with face or bevel of lower wedge. The gates then being down opposite port or valve opening, the face of the upper wedge moves across the face of the lower wedge bringing pressure to bear on the backs of both gates, from central bearings, thus forcing them apart and squarely against their seats. In opening valve, the first turn of the stem releases the upper wedge from contact with lower wedge, thereby instantly releasing both gates (or discs) from their seats before they commence to rise. The other view shows the gates and wedges for Ludlow double gate valves.

Sectional View of Ludlow Double Gate Valve.Gates and Wedges of Ludlow Double Gate Valve.

Birch Pump Valves.

Elsewhere in this issue will be found an advertisement of the Birch Valve & Mfg. Co., of 970 Montana St., Chicago, Ill. This company is placing on the market an excellent pump valve based on years of experience in this particular field. Of this valve the following may be said: They do not warp, curl or extend, nor do they ride the bridges of the seats for they seal only on the outer and inner circle. The company guarantees that they will maintain the pump’s efficiency and eliminate slippage. As they have no screws, nuts or plates to come apart, the cost of adjustments are practically nothing. They are very light in weight and no doubt will find most successful use in water works services. They cost but little more than ordinary rubber valves but will outwear several of them. They arc therefore cheaper in the long run.

Gamon Meter Company.

The illustration herewith shows a sectional view of a six-inch current meter manufactured by the Gamon Meter Co., of Newark, N. J. In speaking of their Watch Dog Current meter, they say. The meter is entirely of brass, no iron being used, neither for Outing Casing, nor even for bolts and nuts. This is the only way in which the working can be properly protected. The tubercles wash into the delicate. parts of the machine, retard the mechanism, cause loss of revenue, and endless trouble; also, as will easily be seen, to get the best results from this type of meter it should be inspected regularly and at frequent intervals for sensibility. To do this with any degree of case with rusted bolts and nuts is out of the question. When cover is removed, the Measuring Chamber is exposed to view, fastened by four large hexagon head Brass Screws; can be readily inspected, easily removed, as often as found necessary. The simple wheel cannot clog up by weeds, waste, etc., and register in favor of the company, against the consumer. Foreign matter will simply clog the meter, and be detected by the inspector as running slow. The spindles are made of Nickel-Copper drawn rod, accurately machined and ground, revolving in bearings bushed with hard rubber. The Wheel is hard rubber, made from flat, well-seasoned stock, machined all over; teeth accurately cut on milling machine, and balanced after being attached to spindle. Gear train is our well known type, using the internal stuffing-box device. Flanges are drilled A. S. M. E. standard. Connections can be supplied either threaded for Wrought Iron Pipe, or Bell and Spigot for Cast Iron Pipe. Meters using the Venturi principle, depending upon a variation of pressure, translated by a more or less complicated and delicate clock mechanism to translate readings upon a chart, require an expensive installation, and constant care to replace charts, wind clock, etc., and then arc only accurate between a narrow range of flows, either low or high—any extreme. It is these points that makes the current type of meter so desirable for large flows.

Sectional View of Six-Inch Gamon Meter.

Bitumastic Enamels Company.

In the new submarine pipe line, under the “narrows” of the Catskill aqueduct, the New York Board of Water Supply has specified Bitumastic enamel for protecting the inside and outside surfaces. This line carries water beneath New York harbor to Staten Island. The siphon consists of approximately 10,000 feet of three-inch cast iron flexible jointed submarine pipe laid from 8 to 30 feet below the harbor bottom. This enamel was perfected as a means of preventing exterior corrosion to water mains caused by electrolysis and interior corrosion in the form of tuberculation. The company says: “The carrying capacity of pipes are rapidly lessened by incrustations. Scraping of pipes to remove the tubercules is unsatisfactory, as the incrustations began to grow again with renewed activity (nearly three times as fast as before scrapping) and the life of the pipe is greatly reduced by the more rapid corrosion of the metal. The abrasion of coating which frequently occurs between the dip at the factory and the laying of the pipe is a serious objection to this process of coating the pipes at the point of fabrication and the coat of paint applied to abraded surfaces and around the joints offered a very meagre protection. The Bitumastic Enamels Co., of New York, claimed to have solved the problem in their Bitumastic enamel which years of experience has shown capable of withstanding the presence of oxygen and water without deterioration. In several cases this enamel has been in marine and other service for over a score of years with no sign of failing. This enamel is Being used to a great extent in this country at the present time upon water mains.”

Recent Patents

1,155,646. Hose-clamp. Frank K. D’Arcy, Kalamazoo, Mich.

1,155,065. Meter. Frank Lambert, New York, N. V.

1,155,666. Meter. Frank Lambert, New York, N. Y.

1,155,067. Fluid-meter. Frank Lambert, New York,

1,155,742. Meter-protection device. Earle A. Le Fever, Buffalo. N. Y.

1,155,722. Fire-alarm system. Felix Gottschalk, Stirling, N. J.

No posts to display