US778749A

US778749A - Grate.

Info

Publication number: US778749A
Application number: US17130603A
Authority: US
Inventors: Alfred E Johnson
Original assignee: Individual
Current assignee: Individual
Priority date: 1903-08-29
Filing date: 1903-08-29
Publication date: 1904-12-27
Anticipated expiration: 1921-12-27

Description

No. 778,749. PATENTED DEC, 27, 1904. A. E. JOHNSON.

GRATE.

APPLICATION FILED AUG. 29,1903.

4 SHEETS-SHEET l yywk clam e13 PATENTED DEC. 27, 1904.

A. E. JOHNSON. GRATE.

APPLICATION FILED AUG. 29.1903.

4 SHBETSSHEET 2v 0 0! woo-14 1 oz N0. 778.749. PATENTBD DEC. 2'7, 1904:. A. E. JOHNSON.

GRATE.

APPLICATION FILED AUG. 29,1903.

4 SHEETS-SHEET 3.

LL n FL/I'L n J No.77&749.' PATENTED-DEO.27,190&

A.E.JOHNSON.

GRATB.

AYPLIGATION FILED AUG. 29.1903.

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UNTTnn STATES Patented December 27, 1904.

PATENT FFICE.

GRATE.

SPECIFICATION forming part of Letters Patent No. 778,749, dated December 27, 1904.

Application filed August 29,1903. Serial No. 171,306.

To all whrmt it may concern:

Be it known that I, ALFRED E. J oHNsoN. a citizen of the United States of America, residing at Colorado Springs, in the county of El Paso and State of Colorado, have invented certain new and useful Improvements in Grates; 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 accompanyingdrawings, and to the figures of reference marked thereon,which form a part of this specification.

My invention relates to improvements in grate constructions for gas-producers and furnaces, and the invention will be described and shown herein as applied to a gas-producing apparatus, though it must be understood that my improved construction is equally applicable to furnaces in general.

The invention will now be described in detail, reference being made to the accompanying drawings, in which is illustrated an embodiment thereof.

In the drawings, Figure 1 is a front view of a gas-producer equipped with my improvements. Fig. 2 is a central longitudinal section of the same, showing the gas-producer in connection with a roasting-furnace. Fig. 3 is a section taken on the line 3 3, Fig. 2. Fig. 1 is a sectional view of the grate, shown on a larger scale. Fig. 5 shows a single grate-bar in cross-section on the line 5 5, Fig.6. Fig. 6 is a top view of a grate-bar with portions broken away to better illustrate its construction. Fig. 7 is a front view in detail, showing the outer bearing for the grate-bars. This view is on a smaller scale than in Fig. 4:. Fig. 8 is a detail view of the lower part of one of the grate-bar bearing-plates shown in Fig. 7. Fig. 9 is a fragmentary detail view of the rear supporting plate or block in which the gratebars are journaled. Fig. 10 is a top or plan view of the water-trough, shown in detail.

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

Let the numeral 5 designate the fire-box, and 6 the ashpit, of a gas-producer. This fire-box, as shown in Fig. 2, communicates by way of a flue 7 with a roasting-furnace 8.

The fire-box is provided with a door 10. This fire-box door is hinged at the top, as shown at 12, and locked on opposite sides by latches 13, pivoted at 14:, whereby they are adapted to swing upwardly to the unlocked position.

The bars 16 of my improved grate are independently mounted and adapted to be shaken or rotated separately. Each grate-bar 16 is composed of a tubular or hollow part or bar 16 and a cast portion 16, secured to the part 16 by stud-bolts 16, which are threaded in the part 16*. The cast portion of the bar is composed of a number of segments which are centrally recessed to fit the hollow part and are applied to the side of the latter which is normally lowermost. These segments 16 project equally on opposite sides of the hollow or body portion of the bar, these laterallyprojecting parts being slotted, as shown at 16*. There may be any desired number of castiron sections or segments 16, or this portion of the bar may be cast in a single piece, if preferred. The rear extremity of each hollow bar is closed by a screw-plug 17. This end of the bar is journaled in a back hearing plate or block 18, having a bearing 18, which the rear extremity of the bar engages. This bearing is open at the rear, as shown at 18 to allow any foreign matter or substance that may accumulate therein to escape into the ash-pit below by way of a passage 18. The forward extremity of this grate-bar is closed by a stuffing-box 19. This end of the bar is entered by a water-supply pipe 20, which passes through the gland 19 of the stuffing-box. Each grate-bar is so connected with the water-pipe that the bar may be turned on the pipe whenever it becomes necessary to shake the grate. The shaking operation of each bar is accomplished by means of a leverarm 21, pivotally connected, as shown at 22, to a collar 19, made fast to the hollow bar by a stud-bolt 28. Each arm 21 is adapted to swing outwardly on its pivot 22 sufficiently to release the arm from engagement with a locking-recess 24:, formed in a forwardly-projecting flange 25, with which the lower part of the water-trough 26 is provided. The waterof the hollow bar 16.

each water-pipe 20 is open to allow the water to enter the bar and pass forwardly therethrough around the pipe 20 to outlet-pipes 27, located forward of the fire-box. These pipes 27 discharge downwardly into the trough 26 for carrying away the water. This trough is arranged underneath the discharge-pipes 27 of all the grate-bars. (See Fig. 1.) The waterpipes 20 are all connected with a main supply-pipe 28, connected with a pressure source (not shown) by branch pipes 29, whereby there is a continuous flow of water under pressure through the grate-bars when the furnace is in use. The grate-bars are further supported and journaled in the front bearing-plate 30 and removable auxiliary plates 30. The plate 30 extends across the front end of the fire-box and forms a support for the wall above. There is an opening 40 in the front wall of the apparatus, and the plate 30 is located in this opening. The plate 30 is provided with openings 30, which are normally closed by the removable plates 30. The bearings for the gratebars are formed half in the plate 30, as shown at 30, and half in the auxiliary plates 30. as shown at 30. The plates 30 are held in place by metal straps 32, which extend vertically across the plates 30, their extremities being bolted to the plate 30 at the top and bottom that is to say, above and below the openings 30. When it is desired to remove the gratebars or any of them, the plate 30 forming a part of the bearing for the bar or bars to be removed, is detached, after which the bar or bars are drawn out through the opening 30. The walls of the fire-box are provided with a front opening 33 below the grate for the introduction of an air-blast from a pipe 3 The fire-box is also provided with openings 35, on opposite sides, located above the grate, for the introduction of an air-blast from a pipe 36.

From the foregoing description the use and operation of my improved fire-box will be readily understood. The fuel, such as coal, from which the gas is to be generated or from which heat is to be produced, as may be desired, is placed within the fire-box through the door 9 and rests upon the grate. The necessary air is introduced below the grate by way of a blast-pipe 34 and above the grate by way of blast-pipes 36, the air passing through the branches 37 and entering the firebox above the grate by way of openings 35. The valves 29 are opened to supply the necessary water to the grate-bars. The water circulates through these bars, being continually in motion, entering by way of the pipes 20 and discharging by way of the outlet-pipes 27 into the trough 26. Whenever it is necessary to shake the grate-bars for the purpose of clearing the grate or for any other reason, the lever-arms 21 are moved outwardly sufficiently to release them from the locking-recesses 24E of the part 25. The lever-arms may then be moved back and forth in succession, whereby the grate-bars are independently given partial rotations in reverse directions. After this is accomplished the lever-arms are again returned to their locking position.

An important advantage in having individual outlets 27 for the hollow grate-bars is that it enables the person in charge of the furnace to know at all times the condition of the fire upon the grate by observing the water as it passes from the pipe 27 into the trough. The temperature of the water indicates the fire on the grate, and if the temperature varies the grate-bars from which the cooler water comes may be shaken in order to clear the grate of ashes and bring the fire in direct contact with the bars. Hence the individual discharge from the grate-bars aids the operator in controlling the furnace and enables him to keep an even fire upon the grate.

Having thus described my invention, what I claim is 1. A grate composed of hollow bars adapted as a whole to be cooled by the circulation of water therethrough and having parts detachably connected with the body of the bars and located wholly below the upper surface of the bars, the said parts being provided with laterally-extending fuel-supportingfingers, the lower portions of said parts being protected from the heat by the hollow portions of the bars.

2. A fire-box grate composed of hollow rotary water-cooled bars provided with individual open-ended exposed outlets, suitable means for supplying water to the said bars, and means for shaking the said bars independently of each other.

3. Afire-box grate composed of hollow rotary water-cooled bars, fluid-pipes entering said bars and extending toward their rear extremities a suitable distance, the size of the pipes being such as to leave a space within the bars and around the pipes for the circulation of the water, exposed individual openended outlets connected with the bars, and means for shaking the said bars independently of each other.

4. A fire-box grate composed of hollow rotary water-cooled bars whose rear extremities are closed, fluid-pipes entering the forward extremities of the bars, a stuffing-box and gland connection between the pipes and the bars whereby the forward extremities of the latter are closed, the said pipes extending toward the rear extremities of the bars a suitable distance and their rear extremities being open to allow the fluid to pass freely into the hollow bars and flow forwardly through said bars around the pipes,and exposed, individual, open-ended outlets connected with the forward portions of the bars, means for introducing water to the pipes entering the hollow bars, and means for shaking the said bars independently of each other.

5. A hollow grate-bar having an exteriorlylocated portion detachably connected therewith, said portion lying wholly below the upper surface of the hollow bar and provided with laterally-extending fingers, the lower part of the said portion being protected from the heat by the hollow portion of the bar.

6. A hollow water-cooled grate-bar having a portion detachably connected with the body of the bar, located wholly below the upper surface of the hollow portion of the bar and provided with fingers extending laterally in opposite directions, the said detachable portion being protected from the heat by the hollow water-cooled portion of the bar.

7. A hollow water-cooled grate-bar provided with a portion detachably connected therewith and located wholly below the upper surface of the bar, the said portion being provided with laterally-extending fingers, and suitable means for introducing water to the hollow bar.

8. A hollow water-cooled grate-bar proyided with a portion composed of a plurality of sections detachably connected with the bar and located wholly below the upper surface of the latter, the said sections being provided with laterally-extending fingers.

9. In a fire-box, the combination of hollow water-cooled grate-bars having parts lying wholly below the upper surface of the bars, said parts being provided with laterally-extending fingers and being protected from the heat by the hollow portions of the bars, front and rear bearing plates or boxes in which the bars are journaled, and depending leverarms hinged to the respective bars whereby they may be moved from the locked to the unlocked position, and a part connected with the front of the lire-box and provided with locking-recesses to receive the respective lever-arms which are normally maintained in the locked position by gravity.

10. In a grate construction, the combination of hollow rotary bars, pipes entering the forward extremities of the bars, the said pipes being carried rearwardly to a point near the rear extremities of the hollow bars, the rear extremities of the water-pipes being open, the forward extremities of the hollow bars being provided with individual open-ended exposed outlets, means for supplying water to the pipes entering said bars, and means for shaking the said bars independently of each other.

11. In a grate construction, the combination of hollow, rotary, water-cooled bars, provided with individual, open-ended, exposed outlets whose highest parts are located above the highest portions of the hollow bars of the grate, thus insuring that the bars remain full at all times when connected with the watersupply, suitable means for supplying water to the said bars, and means for shaking the bars independently of one another.

12. The combination in a fire-box, of hollow rotary water-cooled grate-bars, individual open-ended exposed outlets connected with the bars, a trough adapted to receive the discharge from all of said outlets, and suitable means for supplying the bars with water, and means for shaking the said bars independently of each other.

13. In a fire-box, the combination of a suitable grate composed of hollow rotary watercooled bars provided with individual, exposed, open-ended outlets, and means for shaking the bars independently of each other.

14. The combination in a fire-box, of hollow rotary water-cooled grate-bars, means for supplying the bars with water, individual, open-ended, exposed outlets with which the said bars are provided, and levers for separately operating the grate-bars.

15. In a grate construction, the combination of hollow rotary bars, water-tubes entering the forward extremities of the bars which are provided with stufiing-boxes and glands through which the water-tubes pass, the said tubes extending near the rear extremities of the grate-bars and having their extremities open to discharge into the grate-bars around the tubes, means for introducing water to the tubes under pressure, individual open-ended exposed outlets connected with the hollow bars, and means for shaking the said bars independently of one another.

16. In a grate construction, the combination of hollow bars circular in cross-section and adapted to be cooled by the circulation of water therethrough, and having parts connected with their lower sides, said parts lying wholly below the top surface of the bars and being formed to fit their under sides and constructed to project laterally therefrom to form a fuelsupport through which the air for combustion may pass, the lower portions of said parts being protected from the heat by the hollow portions of the bars, and suitable fastening devices having a threaded connection with the bottoms of the grate-bars, their exposed extremities being located underneath the latter.

17. In a furnace, the combination of afirebox having an opening in its front wall below the plane of the grate-bars, and separated from the fire of the furnace, hollow gratebars, means for introducing water thereto, a waste-water trough located in said opening in the front wall of the fire-box, individual openended, exposed outlets connected with the forward extremities of the bars for discharging the waste water into the said trough, and individual levers connected with the grate-bars, the waste-water trough having a forwardlyprojecting notched flange adapted to receive the grate-bar levers when in their locking position, the said levers being pivoted to swing forwardly out of the said notches when it is desired to shake'the grate-bars.

18. In a grate construction, the combination of hollow, rotary, water-cooled bars, pipes IIO entering the forward extremities of the bars and connected to introduce water to the latter under pressure, individual openended, exposed outlets connected with the forward extremities of the bars, an open trough located beneath said outlets, and means for shaking the said bars independently of each other.

19. In a grate construction, the combination of hollow revoluble grate-bars, means for introducing water thereto at the forward extremities of the bars, the latter being provided with forwardly-located outlets, an open water-trough located beneath the outlets to receive the waste Water, the said trough having aforwardly-extending notched flange, and levers pivotally connected with the individual grate-bars and normally engaging the notched flange of the trough whereby the bars are locked against lateral movement.

ALFRED E. JOHNSON.

\Vitnesses:

H. V. HoLMAN, CHARLES V. TURNER.