US974085A - Automatic water-controller for boilers. - Google Patents

Description

C. E. LINDGREN. AUTOMATIC WATER CONTROLLER PGB BOILEBS. l APPLICATION FILED HALS, 1910. 974,085, f A Patented ocu 25,1910.

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UNTTED STATES PATENT OFFICE.;

CARL E. LINDGREN, OF DENVER, COLORADO, ASSIGNOR OF THREE-FOURTH T RUTH B. ALBERSON., ONE-EIGHTH TO FREDERICK A. DOUGLAJSS, AND ONE-EIGHTH TO A and the pump is a cylinder in which islo- GEORGE M. THOR?, ALL OIE" DENVER, COLORADO.

AUTOMATIC WATER-CONTROLLER FOR BOILERS.

To all whom it may concern: i Be it known that LCAnL E. LINDGREma citizen of the United States, residing in the cit and county of Denver, and State of Co orado, have 'invented `certain new and useful Improvements in Automatic Water- Controllers for Boilers; and I do declare the 'following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which' it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements` in.

means for automatically controlling the water supply of boilers, whether of the stationary or locomotive type.

In my improved construction provision is made for automatically regulating the sup- Ely of steam to the pump which supplies the oiler with water. This is accomplished by means of a perforated casing located in t-he 4steam dome ofthe boiler' and connected .by means of a pipe with the pump. A float' located in the boiler carries a shell which surrounds the erforated casing and is ada ted to cut o the supply of steam thereto rom theboiler, when the oat is raised a predetermined distance. In other words, when the water reaches apredetermined depth in the boiler, beingthe highest level desired, the steam is cut off from the vpump 'and the supply of water to the boiler ceases.

Then as the water lowers in the boiler, due

to the generation of the steam,` the float will drop and gradually uncover the perforations in the casing and -allow steam to pass to the pump for the purpose of keeping up the supply of water. Interposed in the pipe connection between the perforated casing steam pipe fromA entering the pump and' flooding the same. Y

Having briefly outlined my improved construction, I will proceed to describe the,

same in detail, referenoe being made to the Specification of Letters Patent. i I, Patented Application filed March 2,' 1910. Serial No. 546,954.

Oct. 25, 1910.

'accompanying drawin 4in which is trated an embodiment t iereof.

In this drawing: Figure 1 -is a fragmentary view of a boiler equipped with my im- V'illus-4 provement, the connections between the boiler and the pump being also illustrated. Fig. 2 is an en ar'ged sectional view ,ofthe perforated casing and the float carrying the steam cut-oil shell or hood. Fig. 3 is a sectional view taken through the tension cylinder, the spring-actuated'piston being shown in its normal position or when the steam from the boiler is cut off from communication therewith." Fig. 4 is a similar view showing the piston acted on by the steam to allow the latter to pass to the pump. Figs. 3 and 4 are shown on a larger scale than the corresponding construction in Fig. 1. g

.The same reference characters indicate the same parts in all the views.

Let4 the numeral 5 designate the .boiler which, as shown inthe drawing, is equipped with a dome 6 in which is located a perforated casing 7 from which leads a pipe, 8 to a cylinder 9 containing a piston 10 acted on by va coil spring 12, one extremity of which .is engaged by a. follower 13 which is in-turn engaged by a'tension-screw 14 threaded in the. ca 15 of the cylinder. From this cylinder Ileads a pipe 15 to the pump. This pipe 15 is located near one extremity of the cylinder, namely, that where the pipe 8 enters. Connected with the pipe 8 between the boiler and the cylinder -is a of condensation from the pipe 8. The

Vspring 12 should be maintained at such a tension that the piston 10 will -not vmove against the 'spring suiriciently Vto uncover the pipe 15, until the steam pressure is suflicient to operate the pump. Hence, after the steam is eut off from the pipe 8 and the lat- 4ter begins to cool, the spring 12 will act on the piston 10 'and throw the latter to the `position shown in Fig. 3, whereby communication between the pipe 8 and'thepump is cut Voff, 'thus preventing `the water of condensation from entering the pump. Located wit-hin the boiler 5 below the dome 6is a float. 18 u on which is mounted a shell or hood 19 which surrounds the perforated casing 7 and is adapted to cover perforated wall of the casing when' the'boxler is full, the float in`this event being finftlie l I positienshown in Fig. 1. This Shen apio-f vided at its upper extremity lwith an 1nwardly pr'ojectlng flange 2O 1n which is located a packing ring 21 to prevent-the entrance ofsteam. This angeis adapted to engage a shoulder 22 formed on thelower part of the casing, when the hood is at its lowest limit of downward movement, or in position to uncoverv all ofthe perforations l off from communication. with the steam,

hence the steam cannot pass to the pump and the latter'will cease to operate. Now as the water'is used' in the boiler 'for the generation of steam, its level falls and the float moving downwardly therewith gradf ually uncovers the perforations of the Casing 7 and allows steaml to enter the pipe 8.

- If this pipe is coldwhen thesteam 'enters it,

there will be some water lof condensation which, however, Will be caught by .the receptacle'or trap' 17. However, as the hood descends a greater volume of .steam enters the pipe 8 and when the pressure s ullicient for the purpose, the piston 10 will be moved against its spring 12a suilcient distance to uncover the extremity of the pi e 15 communicating with the cylinder 9, a owing the steam-to pass qto the pump which, being set,

inmoti'on, will supply the boiler with water through -the feed p1pe23 By virtueof the c and the spxring 12, together with the follower 13 and .t e tension screw 14, provision is made whereby ,the steam is prevented from passihgto the ypump until the pressure is sucient to' start 'the-latter, and when thel steam pressure 'rises to this extent, .thel piston will' be movedsutliciently to uncover the pipe 1'5 and allow the steafnato pass-to the pump for operatin purposes'.A In the-meantime, it will be un erstood that' thewater of condensation -is cut off from the pump and' caused toenter the trap' or receptacle 17.

The pipe 8 is provided with a valve 24 which is normally open but which maybe closed when for -any reason it may be de-l sirerl to do so.

Having thus described invention, what I claim l1. The combination' with a boiler, 'a pum and a connection between the lboiler. and t `e v ylinder 9, the piston 10 pump 4for sup lying water to the former,.

of a perforate casing located in the steam space o'f the boiler above the water level, `t e said casing havinga shoulder formed onits lowerextremity, a pipeconnection between the said casing and the pump, a

hood surrounding the said casing and vertically movable thereon, the said hood having a flange surrounding the upper extremity .of the hood and adaptd to come into engagement with the shoulder formed on the casing to limit the downward movement of the hood, and a float connected with the hood, and arranged to` rise and fall a'svthe water level fluctuates in the boiler, for the purpose set forth. y

2. The `combination 'with a boiler and a pump connected with the boiler to supply.

water thereto, of a perforated casing .located in the dome of the boiler; a pipe connection between the casing and the pump,

a cylinder interposed in the. pipe leading' from the casing to the pump, a spring-actuated piston therein normally 'arranged tocut off communication between the said pipe connection and the pump, a trap interposed between the said casing and the cylinder for catchin the water of condensationbetween the cylinder and \the casing, and a floatactuated hood located in the boiler connected in operative relation with the perforated casing, whereby as the water rises and falls in the boiler the entrance of steam to the casing is auto1natically regulated.

3. The combination with a boiler, a pump, and a pipeconnection bet-Ween them forsupplying steam to the pump, and a connection -between the pump and boiler-for supplying water to the latter, of a perforated-casing located in the steam s ace of the boiler.. abovethe water levelan in communicationI with the pipe connection between the boiler and pump, the said casing having a shoulder 'on its lower extremit and float-actuated hood located inthe boi er slidably supported on the casing for regulating thepassage of steam to the perforated ca'smg as the water Alevel uct-uates in the boiler, the said hoodhaving a'flange vsurrounding the said upper extremity .of the 4'hood and adapted* to come into engagement with-'the shoulder formed onthe casin to limit the| downward movement 'of the ood, for the purpose'set forth.

' 4L The .combination with a boiler, a pump, and' a connectionbetween the Vpump and a perforated casing located in: the boiler above the' waterV level, floatfactuated means ada ted ,to openand close the perfor-.ations I of e s aidcasing as'the'wat'er iluctua-tesin .the boiler, a pipe leading-from -the' said' ca s' muncates, a piston in said cylinder,jaspring 4acting on the piston, a follower engaging the en screw. arranged teact on los boiler for supplying water to the latter, of

the follower for regulatin the springs. tension, andwapipe leading om the cylinderl to the pump, vtheconstruction being such that the iston when in 'its normal position cuts 'oil' t e' passage ofsteam from the cylvinder vto the pump, while when the piston -is acted on by the steam pressure Aof the boiler, t-he piston is moved against the tension of the spring to permit the passage of steam to the pump," substantially as described.'

'5.. The combination with a boiler, a pump,

and a connection between the pump and the boiler' for. supplying water'to'thelatter, of

`a' perforated .casing located in the steam space Aof l' the boiler, a float-actuated hood haring a telescopiciconnection with the perforated-casing, a pipe connection between the said casing and the pump, and a springactuated pistoninterposed in the said pipe connectionka spring acting on the piston, a

`fo1lower engaging the spring, a tension in presence of-tWo witnesses.

CARL E. LINDGREN.

Witnesses:

VIRGINIA I. DAVIS, ELIZABETH BOWEN.

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