US590884A - Feeder and safety attach iv - Google Patents

Description

(No Model.)

W. AQ GARRIGUS & R. GOLLING. FEEDER AND SAFETY ATTACHMENT EOE BOILERS.

Patented Sept. 28

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WITNESSES.

,To all whom it may concern.-

rrn STATES IVALTER A. GARRIGUS AND ROBERT GOLLING, OF LENOIR CITY, TENNESSEE.

FEEDER AND SAFETY ATTACHMENT FOR BOILERS.

SPECIFICATION forming part of Letters Patent No. 590,884, dated September 28, 1897.

Application filed July 20, 1896.

Be it known that we, WALTER A. GARRIGUS and ROBERT GOLLING, of Lenoir City, in the county of London and State of Tennessee, have invented a new and Improved Feeder and Safety Attachment for Boilers, of which the following is a full, clear, and exact description. V

The object of the invention is to provide a new and improved feeder and safety attachment for boilers whereby thewater is automaticallymaintained at the proper level and in case of accident to the working parts'of' the attachment the fire in the furnace will be automatically extinguished as soon as the water-level reaches the danger-point.

The invention consists of certain parts and details and combinations of the same, as Will be fully described hereinafter and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indi-. cate corresponding parts in both the figures.

Figure 1 is an end elevation of the improvement as applied and with parts in section, and Fig. 2 is alongitudinal sect-ion of the improvement on the line 2 2 of Fig. 1.

The lower part of the water-compartment of the boiler A is connected by a pipe B with a vessel 0, arranged alongside the boiler and supporting on its top a steam-chest 0, connected with the interior of the vessel 0 by a pipe C In the vessel 0 operates a float D, held on one end of a lever D, fulcrumed at D and pivotally connected at its .free end with a valvestem E, extending upwardly through the pipe G into the steam-chest C, said valve-stem being provided with a turnbuckle E for lengthening or shortening said valve-stem E.

The upper end of the valve-stem E is connected with a pin F, projecting from a slide-- valve F, fitted to slide on avalve-seat 0 formed in one side of the steam-chest C, said slide-valve F controlling openingsin the pipes GG, connected with the ends of a'cylinder H, containing a piston H, having its pistonrod H connected with the lever I of a throttle-valve I in the supply-pipe J for the feedwater pump J, said pipe J being connected Serial No. 599,782. (No mocleL) with the steam compartment or dome of the boiler A, as illustrated in Fig. 1. The pipe J is also connected by a branch pipe 0 with the interior of the steam-chest C, so that the water passing into the vessel C from the boiler A rises and falls with the water in the boiler.

I The valve F is provided with a bore F adapted to connect and register with the pipe G in case the water-level in the boiler A and the vessel 0 falls below a normal level, in which case the float D in moving downward will cause the lever D to lift the valve-stem E and move the valve F upward to bring the said bore F in register with the opening of the pipe G. When this takes place, stea1n from the steam-chest O can passthrough the bore F into the pipe G and into 'tl1e righthand end of the cylinder 11 to pushthe piston H outward, so that the rod I'I imparts a swinging motion to the lever 'I to'open' the throttle valve I. The motive agent now passes to the feed-pump to actuate the same and to pump water into the boiler, preferably by way of the pipe J and vessel 0, as indicated in Fig. 1. XVhen the Water rises in the boiler A and vessel 0, then the float D moves upward and the valve F is caused to move downward back to its normal position, (shown in Fig. 1,) so that the bore F is cut off from the pipe G. TVhen the water rises farther in the boiler A and vessel 0, then a farther downward movement ofthe valve F opens the pipe G to-the steam-chest- O, so that live steam now passes through the pipeG into the outer end of the cylinder H to push the piston H back to its normal position. (Shown in Fig. 1.) this position causes a closing of the throttlevalve I, so that the feed-pu mp J is stopped.

In case the feed-pump does not start and stop in the manner above described, should an accident occur to any of the working parts, then the fire is automatically extinguished, and for this purpose we provide the following arrangement: Into the valve-seat 0 opens a pipe K, normally closed by the lower part of the valve F,and this pipe K connects with one end of the cylinder K, containing a piston K connected at its piston-rod K with the leverL of a valve L, held The piston H in moving back to 2 590,88&

in a pipe L connecting the lower end of the vessel 0 with the fire-box A of the boiler A. \Vhen the water falls in the boiler A and vessel C below a normal level and the feed-pump J is not started, as previously described, then the float D in falling will cause a lifting' of the valve F until finally the lower end of said valve uncovers the pipe K, and consequently steam from the steam-chest G can pass into the pipe K and to the cylinder K to force the piston K outward to open the valve L. -Water now flows from the vessel 0 through the pipe L into the fire-box A of the boiler to extinguish the burning fuel therein. When this takes place, the operator in charge of the boiler A closes the valve 13 in the pipe B, so that the live steam presses on the water contained in the vessel O to force the water under pressure into the firebox A to insure an extinction of the fire. It is understood that by closing the valve 13 the water in the boiler is retained and steampressnre is given to the water contained in the vessel G. hen the defect in the machinery has been repaired and the feed-pun] p J or other feeding device has been started and a sufficient quantity of water has accumulated in the boiler A, then the valve B in the pipe B is again opened, it being understood that the valve L in the pipe L is closed soon after the fire is extinguished. The vessel C will then refill with Water to the same level as that of the water in the boiler.

hen it is desired to blow out the boiler, the pipes G and G are closed by valves G and G arranged in said pipes, so that the piston H remains in position if the water falls below the normal level. It Will also be seen that when the valves G and G are closed the fire in the fire-box A is extinguished by water passing through the pipe L in the manner previously described and before the water-level reaches the dues in the boiler A. Thus the fire will be extinguished and the furnace will be cooled before the fines are exposed to heat. It is also desirable to let the water rise in the boiler at the end of a days work above a normal level, and for this purpose the valves G and G are closed and the feed-pump started by hand until the desired level in the boiler is reached.

Having thus fully described our invention, we claim as new and desire to secure by Letters Patent 1. In a device of the class described, the combination with a boiler, a feed-water pum p, and a steam-supply pipe leading from the steam compartment or dome of the boiler to the pump and provided with a valve having a lever at one end, of a vessel communicating with the boiler, a steam-chest above the vessel and communicating with the steamsupply pipe,a pipe connecting the steanrchest and vessel, a cylinder, a piston in the cylinder and having its stem loosely connected with the lever of the valve in the snpply-pipe, pipes leading from the steam-chest to opposite ends of the cylinder, a slide-valve fitted to slide on a valve-seat arranged on one side of the steamchest over the ends of the pipe leading to the cylinder and provided with a pin projecting therefrom, a pivoted lever in the vessel, a float on one end of the lever, and an adjustable connection between the pin of the valve and the other end of the said lever, substantially as described.

2. A device of the class described, comprising a vessel having a steam-chest and in communicationwith the steam and water com partments of the boiler, a tloat-col'ltrolled valve in said steam-chest, a cylinder containing a piston, and a pipe connecting said vessel with the fire-box of the boiler, said pipe containing a valve adapted to be opened by said piston, substantially as shown and described.

3. A device of the class described, comprising a vessel having a steam-chest and in communication with the steam and water compartments of the boiler, a float-controlled valve in said steam-chest, a cylinder containing a piston, a pipe connecting the cylinder with the steam-chest and a pipe connecting said vessel with the lire-box of the boiler, said pipe containing a valve adapted to be opened by said piston, substantially as shown and described. p

4. In a device of the class described, the combination with a boiler, a feed-pump and a valve supply-pipe connecting the pump and boiler, a cylinder, a piston having its stem connected with the valve of the supply-pipe,

a vessel connected by pipes with the boiler and fire-box, a steam-chest con nected with the vessel and the supply-pipe, valved pipes connecting the cylinder with the steam-chest, a valve in the pipe leading from the vessel to the fire-box, a second cylinder, a piston in said cylinder and having its stem connected with the valve in the pipe leading from the vessel to the fire-box, a pipe connecting the steam-chest with the said second cylinder, a slide-valve in the steam-chest and controlling the admission of steam to the pipes leading therefrom, a float in the vessel and a connection between the float and slide-valve, substantially as herein shown and described. XVALTER A. GARRIGUS. ROBERT GOLLING.

\Vitnesses:

R. P. EATON, Jr., J. V. THORNTON.

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