US831417A

US831417A - Steam-generator.

Info

Publication number: US831417A
Application number: US29422906A
Authority: US
Inventors: Thomas Clarkson
Original assignee: Individual
Current assignee: Individual
Priority date: 1906-01-02
Filing date: 1906-01-02
Publication date: 1906-09-18
Anticipated expiration: 1923-09-18

Description

No. 831,417. PATENTBD SEPT. 18, 1906.

T. GLARKSON.

STEAM GENERATOR.

APPLICATION FILED JAN.2,1906.

.THE NORRIS PETERS ca, wAsnmnromut c.

THOMAS OLARKSON, OF OHELMSFORD, ENGLAND.

STEAM-GENERATOR.

Specification of Letters Patent.

Patented Sept. 18, 1906.

Application filed January 2,1906. Serial No. 294,229.

To all whom it may concern:

Be it known that I, THOMAS CLARKsoN, a subject of the King of England, residing at Chelmsford, in the county of Essex, England, have invented certain new and useful Improvements in or Relating to Steam-Genera tors, of which the following is a specification.

This invention relates to steamgenera tors, and has for its object to construct one which is more particularly suitable for use on motor-vehicles and the like.

According to this invention, which refers to generators of the coil or flash type, the coils are so arranged that they in themsvlves serve to trap the steam and prevent it from rising to the water-inlet end of the generator. In one form the generator comprises a conveniently-cylindrical casing, within -which are superimposed a series of spiral or involute coils of tubing, each coil being formed conical to a greater or less extent, as found desirable. The apices of the conical coils may be directed either upward or downward, but preferably upward. Water is introduced at the lowest convolution of the uppermost coil, the uppermost convolution of this coil being connected with the lowermost convolution of the conical coil next beneath it. All the coils are similarly connected together, steam being withdrawn from the uppermost convolution of the lowest coil. It will thus be seen that water and steam pass through the generator as a whole in a direction contrary to that in which the hot gases pass through the genera tor-casing around the coils. Alternatively the circulation may be partially in an opposite direction and partially in the same direction as the hot gases. Each conical coil forms a trap which will prevent steam from rising to the upper coils when the throttle-valve or steam-outlet from the boiler is closed. 1

The coils of tubing may be supported within the casing in various ways, as by annular brackets formed on the wall of the casing or otherwise, as found convenient. Preferably, however, the following device is used: Two steel strips of suitable dimensions are riveted or otherwise fastened together about their center and then bent so as to form an X- shaped figure. The ends of the members of this X are bent round and riveted or otherwise secured to the wall of the generator-casing. The strips of which the spring-pieces are made are so shaped that each support will lie in the conical space between two adjacent coils of tube and the edges of the metal strips may be notched so as to receive the convolutions of these coils, and thus retain them in their proper positions, while keeping each coil as a whole at its proper distance from the adjacent coils.

The convolutions of the several conical coils are conveniently so relatively arranged that they alternate, thus breaking up the passage through which the hot gases have to pass and insuring an even distribution and:

absorption of heat.

It is convenient in many cases to have the generator combined with a device which will enable the heat-supply thereto to be regulated in accordance with the temperature of the contents of the generator.

Referring to the drawings, Figures 1 and 2 are respectively a sectional elevation and plan of a preferred embodiment of this invention.

The generator, according to this embodiment, comprises a series of similar conical coils A, having the apices or narrow parts of the coils directed upward. The Water enters the coils at athat is to say, at the lowest convolution of the uppermost coiland after circulating through this coil passes from the apex thereof downwardly by a pipe A to the lower convolution of the second coil, and after passing through this coil is led from the top thereof by a similar pipe A to the lower convolution of the third coil, and

so on until it reaches the lowermost convolution of the lowest coil. The coils are all similarly connected, as shown, and the.generator may be constructed of a single length of tubing. The diameter of the coil may be the same throughout, but-preferably the diameter is increased'toward the lower part of the generator, as shown at a, and still farther down at the hottest part the thickness of the metal is also increased, as shown at a The coils being so arranged and the fluid always entering at the lower part of a coil and passing therefrom at the upper part by a tube which extends downward to the lower convolution of the next coil, the coils each serve in themselves to trap steam and prevent it rising to the water-inlet end of the generator, as above stated, the result being obtained without the employment of any extra steam-trapping device. The steam is with drawn or taken out from the lower end of the generator, and therefore does not pass through the cool gases, but out of the hot level of the generator.

The pipes A serve also as distance-pieces between theadjacent coils, and these pipes are arranged or staggered so that one pipe A is approximately diametrically opposite to the next pipe A.

Between the coils and at the side opposite to that along which the pipes A extend distance-pieces C are introduced, as shown at the lower part of the generator in Fig. 1, the remaining distance-pieces being omitted from the drawings for the sake of clearness. These distance-pieces can be connected to the convolutions of the coils in any convenient manner;

B is the surrounding casing for the generator and is situated above the burner.

The water can be led to the upper end of the generator in any appropriate way but preferably there is arranged in the lower part a heating-coil H, through which the water is first led and from which it passes by a pipe H to the upper coil A.

The parts are kept in position by a fourarmed support D, situated below the lowermost coil, and by plates G, resting on the upper coil. These parts are bound together by a bolt E, which extends through the support D and a cap F, which rests on the plates G, the upper end of the bolt being screwthreaded to receive a nut E.

It is preferable to use a thermostatic regulator of any appropriate construction to control the heat-supply in accordance with the temperature of the contents of the generator. Such a regulator is illustrated more or lessconventionally in Fig. 1. The regulator shown comprises two concentricallyarranged tubes K L, having substantially the same coeflicient of expansion, the free ends of said tubes being connected by a third concentrically-arranged tube M, the coefli cient of expansion of which is negligible. Connected with the outer tube L is a rod N, adapted to control, through any suitable means, (not shown,) the burner in accordance with the expansion of said tube. The steam is led to the regulator preferably from the pipe A at the lowest end of the generator, and after passing through the regulator enters the generator proper by the pipe A whence it passes through the coil A and is led from the upper end of this coil to the throttle by the pipe A The coil A serves as a superheating-coil.

When the generator is composed of a number of separate coils, these may be joined in any appropriate manner. Preferably the joints are welded. With reference to the coils at the lower or hotter end of the generator it is preferable to make a joint which can readily be broken to permit a burned-out coil to be removed and a new one inserted. The ends of these coilsthat is to say, the part containing the jointare preferably carried outside the casing, as shown in Fig. 2

I and connected by a nut-union a What I claim as my invention, and desire to secure by Letters Patent, is

1. In a steam-generator, the combination with a series of superimposed similar conical coils, of straight tubes connecting the upper convolution of each coil withthe lower convolution'of the coil next below it for the purpose described.

2. In a steam-generator, the combination with a series of superimposed similar conical coils, of straight tubes directly connecting the upper convolution of each coil with the lower convolution of the coil next below it, for the purpose described.

3. In a steam-generator, the combination w th a series of superimposed similar conical coils, of tubes connecting the upper convolution of each coil with the lower convolution of the coil next below it, a cylindrical coil situated at the lower end of the generator, a pipe connecting this coil with the lower convolution of the topmost coil of the generator, a water-inlet to the lower convolution of the cylindrical coil, and a steam-exit from the upper convolution of the lowermost conical coil, substantially as set forth.

4. In a steam-generator, the combination with a series of superimposed similar conical coils, of tubes connecting the upper convolu' tion of each coil with the lower convolution of the coil next below it, a cylindrical coil situated at the lower end of the generator, a pipe connecting this coil with the lower convolution of the topmost coil of the generator, a water-inlet to the lower convolution of the cylindrical coil, a steam-exit from the upper convolution of the lowermost conical coil,.

means for holdingthe conical coils in place, and an inclosing casing for all the coils, substantially as set forth.

5. In a steam-generator, the combination with a series of superimposed similar conical coils, of tubes connecting the upper convolution of a coil with the lower convolution of the coil next beneath it and acting also as distance pieces between the coils, and distance-pieces arranged between the coils diametrically opposite to the connecting-tubes, substantially as set forth.

6. In a steam-generator, the combination with a series of similar superimposed conical coils and tubes connecting the upper convolution of a coil with the lower convolution of the coil next beneath it and also acting as distance-pieces between the coils, of distancepieces diametrically opposite to the connecting-tubes, a supporting-piece beneath the lowest coil, confining-plates bearing on the topmost coil, a cap and a bolt passing through the lower supporting-piece, and a cap and a nut on the end of the bolt, substantially as set forth.

7. In a steam-generator, the combination with a series of superimposed conical coils, of

tubes connecting the upper convolution of each coil with the lower convolution of the coil next below it, an outlet from the upper convolution of the lowermost coil communicating with a regulator, an inlet from this regulator communicating with the lowest convolution of a superheating conical coil situated at some point intermediate between the uppermost and lowermost conical coils, and an outlet from this superheating conical coil, substantially as set forth.

8. In a steam-generator, the combination with a series of superimposed similar conical coils, of tubes connecting the upper convolution of a coil with the lower. convolution of the coil next beneath it and acting also as distance-pieces between the coils, distancepieces arranged between the coils diametrically opposite to the connecting-tubes, an outlet from the upper convolution of the lowermost coil communicating with a regulator, an inlet from this regulator communicating with the lowest convolution of a superheating conical coil situated at some point intermediate between the uppermost and lowermost conical coils, and an outlet from this superheating conical coil, substantially as set forth.

9. In a steam-generator, the combination with a series of similar superimposed conical coils, of tubes connecting the upper convolution of a coil with the lower convolution of the coil next beneath it and also acting as distance-pieces between the coils, distancepieces diametrically opposite to the connecting-tubes, a supporting-piece beneath the lowest coil, confining-plates bearing on the topmost coil, a cap and a bolt passing through the lower supporting-piece, a cap and a nut on the end of the bolt, an outlet from the upper convolution to the lowermost coil communicating with a regulator, an inlet from this regulator communicating with the lowest convolution of a superheating conical coil situated at some point intermediate between the uppermost and lowermost conical coils, and an outlet from this superheating conical coil, substantially as set forth.

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

THOMAS CLARKSON. Witnesses:

JosEPrr LAKE, WILMER M. HARRIS.