US1793223A - Fuel-distributing apparatus - Google Patents

Description

Feb. 17, 1931. H. E. LIPPERT I 1,793,223

FUEL DI STRIBUTING APPARATUS Filed Dec. 24, 1929 Patented Feb. 17, 1931 UNITED STATES PATENT OFFICE HENRY E. LIPPKBT, OI BALTIMORE, MARYLAND, ASSIGNOR TO NATHAN M.

. vIBALZL'IIMIORIE, MARYLAND I town, or

FUEL-DISTRIBUTING APPABA'JFI'IS Application filed December 24, 1929. Serial No. 416,262.

Thisinvention relates to fuel distributing apparatus used in connection with a stoker and is here shown and described as applied to a locomotive boiler but it is to be understood that this invention is for use with any type of firebox.

. In a boiler which automatically receives fuel by a stoker it is necessary tohave the fuel scattering table project into the firebox of the furnace in order that the entire area of the firebox will receive fuel. Due to the intense heat of the firebox this scattering table readily burns away. In making the necessary replacement the fire must be extinguished and very often costly delays occur. It is the object of my invention to increase the life of this scattering table and make this repair less frequent by roviding a means for preventing coal from 10' ging beneath the scattering table so thatthere will be no fire below it.

'In the present method of cooling the scattering table, air is admitted through the firing opening in the backhead of the furnace. The relatively small volume of air admitted in this manner does not greatly affect the burning of the table. If the required volume of cold air was admitted in this way an objectionably large firing opening would be'required. It is another object of this invention'to keep the portion of the firebox grates beneath the scattering table bare so that a relativel large volume of air can be admitted theret rough and constantly impinge on the underside of the scattering table.

Other objects and advantages of the invention will be apparent during the course of-the following description, taken in connection with the accompanying drawings, in which:

Fig. 1 is a longitudinal sectional view of the forward end of a stoker, the rearward end of a furnace,.and the invention; showing the invention in its applied position.

Fig. 2 is a sectional view taken on line 2-2 of Fig. 1.

In Fig. 1, the numeral 1 designates the iiring opening in the backhead 2, of a furnace; 3, the grates in the firebox 4; and 5, a stoker delivering fuel to the firing openin 1. A firedoor 6 closes the upper portion 0 the firing opening 1. The stoker 5 is supported on the lower edge 7 of the firing opening, and

closes the lower portion.

Arranged at the forward end-of the stoker 5, is the fuel distributing plate 8, upon which the fuel is discharged by the stoker mechanism. The distributing plate 8 comprises a rearward jet portion 9, and a forward scattering table 10. As the fuel is placed on the scattering table 10, by the stoker mechanism, a series of fluid jets 11, at the rear of the scattering table, dischar e it over the grates 3.

The scattering-table 10 extends beyond the inside sheet 12, of the backhead, and into the firebox 4. Below the scattering tableI have provided the perforated metal wall 13 to prevent coal from lod ing and burning beneath the scattering table. The wall 13 extends downwardly from the underside of the scattering table 10 to apoint a short 'distance above the top of the grates 3. Clearance 14, between the wall 13 and the top of the grates, permits shaking of the grates. The wall 13 conforms in shape to the outer edge of the scattering table 10 and is in this case semi-circular, as illustrated in Fig. 2. The wall 13 is rigidly secured to the backhead 2 by bolts or rivets 15 which extend through the backhead 2 and the flanges 18 of the wall 13. The bare portion of the grates enclosed I cold air chamber between the wall 13 andthe backhead 2.

- What I claim as new and desire to secure by Letters Patent is: 1

1. In a firebox having grates and a backhead provided with a ring opening; a

stoker delivering to said opening, the discharge end of said stoker terminating at said head provided with a opening,a fuel scattering table extending in said firebox and receiving fuel downwardly from said stoker, a wall positioned between said wall conforming substantially to the shape of the forward edge of said table;

3. In a firebox having grates and a backhead provided with a firing opening; a stoker delivering to said opening, the discharge end of said stoker terminating at said openlng, a 'fuel scattering .table extending in said firebox and receiving fuel from said stoker, a wall positioned between the underside of said table and said grates for providing a relatively cold air chamber beneath said table, said wall being rigidly secured to said backhead.

4. In afirebox having rates and a backstoker delivering to said opening, the discharge end of said stoker terminating in said opening, a fuel scattering table extending in said firebox and receiving fuel from said stoker, a perforated wall positioned between the underside of said table and said grates for providing a relatively cold air chamber beneath said table. I

5. In a firebox having grates and a backhead provided with a firing opening; a stoker delivering to said opening, the discharge end of said stoker terminating in said opening, a fuel distributing plate positioned forward of the discharge end of said stoker, a cavity in said plate, pipe lines in communication with said cavity, a wall between said plate and said grates for providing a relatively cold air chamber beneath said plate, said pipe lines passing through said cold air chamber.

6. In a firebox having grates and a backhead provided with a firing opening; a stoker delivering to said opening, the discharge end of said stoker terminating in said opening, a scattering table in said firebox having jet openings at the rear thereof, a cavity in com munication with said jet openings, pipe lines in communication with said cavity, a wall extending downwardly from the underside of said table to a point above the top of said grates, said pipe lines extending downwardly from' said cavity between said wall and said backhead.

7. In a head provided with a firing opening; a stoker delivering to said opening, the discharge end of said stoker terminating in said opening, a

ring opening; a

firebox having grates and a back-- plate extending in said firebox and receiving.

said backhead for permitting relatively' cold air to be drawn between said wall and said backhead through said grates.

9. In combination, a firebox having grates, a backhead provided with a firing opening, a stoker delivering to said opening, the discharge end of said stoker terminating at said opening, a plate extending in said firebox and receiving fuel from said stoker, a wall extending downwardly from said plate to a point above the top of said grates, fluid jets for dis charging fuel over said firebox, pipe lines leading to said jets, said pipe lines positioned in said firebox between said wall and said backhead.

10. "In a firebox having grates and a backhead provided with a firing opening; a stoker delivering to said opening, the discharge end of said stoker terminating atsaid opening, a plate extending in said firebox and receiving fuel from said stoker, a wall extending downwardly at the forward edge of said plate, said wall being spaced from said backhead for permitting relatively cold air to be drawn between said Wall and said backhead.

In testimony whereof, I affix my si nature. HENRY E. LIPP JR'l.

DISCLAIMER 1,7 93,223.Henry E. Lippert, Baltimore, Md. FUEL-DISTRIBUTING APPARATUS. Patent dated February 17, 1931. Disclaimer filed November 30, 1931, by the assignee, Nathan Ill. Lower.

Hereby enters this disclaimer to that part of the claim in said specification which is in the following words, to wit:

1. In a firebox having grates and a backhead provided with a firing opening; a stoker delivering to said opening, the discharge end of said stoker terminating at said opening, a fuel scattering table extending in said firebox and receiving fuel downwardly from said stoker, a wall positioned between the underside of said table and said grates for preventing coal from lodging beneath said table.

3. In a firebox having grates and a backhead provided with a firing opening; a stoker delivering to said opening, the discharge end of said stoker terminating at said opening, a fuel scattering table extending in said firebox and receiving fuel from said stoker, a wall positioned between the underside of said table and said grates for providing a relatively cold air chamber beneath said table, said wall being rigidly secured to said back-head. Y

1. In a firebox having grates and a back-head provided with a firing opening; a stoker delivering to said opening, the discharge end of said stoker terminating in said opening, a fuel scattering table, extending in said firebox and receiving fuel from said stoker, a perforated wall positioned between the underside of said table and said grates for providing a relatively cold air chamber beneath said table.

5. In a firebox having grates and a back-head provided with a firing opening; a stoker delivering to said opening, the discharge end of said stoker terminating in said opening, a fuel distributing plate positioned forward of the discharge end of said stoker, a cavity in said plate, pipe lines in communication with said cavity, a wall between said plate and said grates for providing a relatively cold air chamber beneath said plate, said pipe lines passing through said cold air chamber.

10. In a firebox having grates and a back-head provided with a firing opening; a stoker delivering to said opening, the discharge end of said stoker terminating at said opening, a plate extending in said firebox and receiving fuel from said stoker, a wall extending downwardly at the forward edge of said plate, said wall being spaced from said back-head for permitting relatively cold air to be drawn between said wall and said back-head.

And your petitioner hereby further enters this disclaimer relative to claims 2, 6, 7, 8 and 9 of the said Letters Patent to-wit: to the combinations of elements set forth in the said claims 2, 6, 7, 8 and 9, except as the same are embodied in a device in which the wall, specified in each of the said claims as extending downwardly to a point above the top of the grates, terminates at a substantial distance above the top of the grates, thereby to provide a space for the shaking of the grates.

[Ofiicial Gazette December 22, 1931,]

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