US595844A - Island - Google Patents

Description

(No Model.)

D. 85 F. D. ALMY STEAM GAGE.

No. 595,844. Patented De0.Z1,1897.

INYENTUHE W'I TNEEEIE UNITED STATES PATENT EErcE.

DARI/VIN ALMY AND FRANK D. ALMY, OF PROVIDENCE, RI-IODE ISLAND.

STEAM GAG E.

SPECIFICATION forming part of Letters Patent N 0. 595,844, dated December 21, 1897.

Application filed JanuarylQ, 1897. Serial No. 619,724. (No model.)

To all whom, it may concern:

Be it known that we, DARWIN ALMY and FRANK DELANO ALMY, of Providence, in the county of- Providence and State of Rhode Island, have invented a new and useful Improvement in Steam-Gages; and we hereby declare that the following is a full, clear, and exact description of the same, reference being had tothe accompanying drawings, forming part of this specification.

This invention has reference to an improvement in a device secured to a steam-gage by which the steam is made to press on the surface of a body of Water, as will be more fully described hereinafter.

Steam-gages are usually connected to an inverted siphon, so that the water of condensation will collect in the siphon, and the steam exerts the pressure on the water in the pipe forming the leg of the siphon connected with the steam-supply. Inverted siphons are apt to affect the reliability of the steam-gage by the variation of the column of water in the leg of the siphon connected with the steam-pipe. They are liable to freeze in cold weather and it requires time and patience to thaw them out.

One object of this invention is to secure greater reliability and accuracy.

Another object of the invention is to so construct the attachment that the heat of the steam will melt any ice formed in the siphon.

Another object of the invention is to'provide means for drawing off the water from the device.

To this end the invention consists in the peculiar and novel construction of the device, whereby the steam exerts its pressure on a body of water under practically uniform conditions, as will be more fully set forth hereinafter.

Figure 1 is a front view of a steam-gage, showing the device forming the subject of this invention secured thereto. Fig. 2 is a vertical sectional View of the device. Fig. 3 is an edge view of the device! Similar letters of reference indicate corresponding parts in all the figures.

In the drawings, A indicates the steam gage 5 B, the device attached to the steamgage, consisting of the shell 0, preferably of circularformfhaving either or both of the sides d cl, or, if desired, only one side (Z, flattened, although the shell may be of practically spherical form. The device is provided at its upper end with the screw-threaded nipple c, by which it is connected with the steamgage. The interior is divided by the partitions f and 9 into the passages h and iand the central space is, which is connected with the passage '5 by the opening Z at the upper part and with the passage 0% at the lower part. The passage h extends upward through the nipple e and the passage i downward through the valve-case n and connects with the internally-screw-threaded cup 0, to which the steam-pipe is secured. The cook 19 controls the passage 2' and serves to let on or shut ofi the steam. The screw-plug (1 may be unscrewed when it is desired to drain the water from the device, and, if desired, a small petcock may be used in place of the screw-plug.

In the preferred form the valve-casing n is made integral with the device, but the valvecasing 'n. and cook 19 may be omitted or be placed at any desired place into the pipe connecting the steam-gage with the steam-supply.

The operation of the device is automatic. When the steam-gage provided with the device is connected and steam is turned on, the steam rapidly condenses and the water of condensation collects in the central chamber is.

The pressure of the steam acting on the surface of the condensed water raises the water through the passage it into the tube of the steam gage. The condensation continues until the chamber kis filled with water and the steam-pressure is exerted on the water in the opening Z. All the water of condensation in the passage 11 flows down that passage, and the water-level in the chamber is always maintained at the same level-namely, in the normal condition in the opening Z at the point of overflow. The variation in the static pressure of the water is limited to the vertical distance between openings land m, which in practice is not appreciable.

When ,as frequently happens in the inverted siphon heretofore used, the water freezes to a greater or less extent in the device, by turning on the steam the same flows through the passage 11 and heats the partition g,which soon melts all ice in the chamber is. The steam also comes into contact with the upper part too of the partition f and heats the ice or water in the passage h, so that any ice in the device will soon be melted. Water should, however, be drawn off from the device and the steamgage when there is any danger of freezing by the'unscrewing of the plug q or the opening of any petcock used in its place.

We are aware that a siphon-chamber of approximately circular form has been heretofore side to the lower part of the case a large central water-chamber and large ducts or passages are secured and the steam acts directly on the surface of the water in the central Chamber.

Having thus described our invention, we

claim as new and desire to secure by Letters Patent- The combination with a steam-gage, of a hollow shell, of approximately circular form, having two oppositely-disposed openings,and partitions, dividing the interior into the passages 'i and to, extending along the outer periphery of the shell and the central circular space 70, whereby the water of condensation is collected in the central space, the channel connecting with the gage connects with the central water-space at the lowest part of the shell and the steam acts on the water in the central space at the highest part of the shell, as described.

In witness whereof we have hereu nto set our hands.

DARWIN ALHY. FRANK D. ALMY.

WVitnesses:

JOSEPH A. MILLER, J 1:, M. F. BLIGII.

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