US409304A - Steam boiler furnace or other furnaces - Google Patents

Description

(No Model.) ,3 Sheets-Sheet 1. W. R. HONEY.

STEAM BOILER FURNACE OR OTHER FURNACES.

No. 409,304. Patented Aug. 20, 188 9.,

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(No Model.) 3 Sheets-Sheet 2. W. R. HONEY.

STEAM BOILER FURNACE OR OTHER FURNACES.

Wfloraagd (No Model.) 3 Sheets-Sheet :5

' W. R. HONEY. STEAM BOILER FURNAGE OR OTHER FURNACES.

No. 409,304. Patented Aug. 20, 1889.

UNITED STATES P TENT Orricn.

IVILLIAM It. HONEY, OF CIIICAGO, ILLINOIS, ASSIGNOR TO THE ESTING- HOUSE, CIIUR II, KERR & COMPANY, OF NEIV JERSEY.

STEAM-BOILER FURNACE OR OTHER FURNACE.

SPECIFICATION forming part of Letters Patent No. 409,304, dated August 20, 1889.

Application filed September 23, 1886. fierial No. 214,304. (No model.)

To ctZZ whom it may concern:

3e it known that I, \VILLIAM R. RONEY, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Steam-Boiler Furnaces or other Furnaces; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

This invention relates to furnaces, and to that class of devices known as mechanical stokers, or devices for feeding fuel to furnace-fires.

It has for its primary object to secure a more perfect coking of the coal or screenings on its way to the fire proper, together with a more perfect combustion of the gases emitted by the fuel, and therefore greater economyin the consumption and less waste in the form of smoke or soot.

The invention also has for one of its obj ect s to provide improved mechanism for advancing the fuel from the magazine to and along the grates, whereby the supply of fuel is rendered more regular and continuous, and is effected under full control of the attendant.

Other and minor objects of the invention will further appear from the following description:

Referring to the accompanying drawings, which illustrate what I now believe to be the most desirable form in which my invention can be embodied, Figure 1 is a central vertical longitudinal section of a steam-boiler furnace containing my improvement. Fig. 2 is a plan 01' top view of the magazine or hopper and grates, being such a view as will be afforded by a transverse section in the indirect line 0c 00 of Fig. 1. Fig. 3 is an elevation of a furnace and boiler front, showing the eX- posed parts of my device in front view there of. Fig. 4 is an enlarged sectional view of parts similarly shown in Fig. 1. Fig. 5 shows in end view the rocking bars of the inclined grate in connection with one of their end supports and the actuating-bar, the gratebars being shown tilted forward to allow the fuel to advance. Fig. 6 shows the bars of the inclined grate with their upper faces horizontal,

or in position. to retard or prevent the advance of the fuel. Fig. 7 is a top view of the parts shown in end view in Fig. 6. Fig. 8 is a fragmentary section in the line 1 1 of Fig. 4,. showing the connections of a pitman with the eccentric shaft and the actuating bar for rocking the bars of the inclined grate, (the bottom plate of the hopper,) the subjacent angular plate G being removed. Fig. 8 is a section similar to Fig. 8, showing in top view the connections for reciprocating the follower and bottom plate of the hopper. Fig. 9 shows in front elevation the parts illustrated in plan view in Figs. 8 and 8. Fig. 10 is an en- 6 5 larged side elevation of the connections shown in the top viewin Fig. 8. Fig. 11 is a side view of the horizontal grate. Fig. 12 is a top View of said horizontal grate and a horizontal section in line 2 .2 of Fig. 11, showing the grated stationary bar which separates the horizontal from the inclined grate. Fig. 13 is a sectional View showing one alternative construction of the connections that may be employed with the actuating-shaft for operating the movable part of the hopper and the rock in g grate-bars.

A represents a steam-boiler, of which B B is the setting. I

C is the fire-box.

D is a dropping grate at the rear of the fire-box.

E is an inclined grate arranged to deliver upon the grate D, and F is an external hop per or magazine situated in position to deliver upon the upper end of the inclined grate E through a passage f in the fire-front.

G is an angular plate situated at the bottom of the passage f and extending over the uppermost bar of the grate E. 0

II is a fire-brick hood or arch overhanging the upper portion of the grate Eand proceeding rearwardly and downwardly from the front of the setting above the passage f.

I is an arch extending forwardly over and 5 into proximity with the arch II, affording a somewhat contracted passage 0 from the firechamber C to the space beneath the boiler.

The grate E is composed of a series of rocking transverse bars 9 e, resting at their ends 6 in notches e provided in the upper edges of two stationary inclined supportingbars E. It is a characteristic feature of the grate-bars e that their upper surfaces are broad, flat, and continuous, or non-fingered, and it is a characteristic feature of their arrangement that they are placed in the stepped and overlappingposition shown, wherein the rear edgeof one bar projects over the front edges of the subjacent bar with sufficient vertical space between their overlapping edges to allow the rocking movement desirable or necessary to insure the proper feeding of the fuel thrown from front to rear of the grate. The grate-bars 66 are severally provided with depending arms a which are engaged with a reciprocating rod or bar E by movement of which the grate-bars c 6 may be rocked on their bearings upon the bars E. In the present instance the uppermost and the lowermost gratebars are pivoted at c to the bar E ,thus upholding the latter, and the arms of the intermediate grate-bars merely engage notches c in the said bar E Other forms of engagement may of course be employed if preferred. The rocking movement of the bars e is adjusted to bring said upper faces at one extreme of their movement into a substantially horizontal position and into the stepped relation shown in Fig. 6, and at the opposite extremity of their throw into the inclined relation shown in Fig. 5. Each gratebar 6 is provided as a separate improvement, with an uprising rib or flange 6 along the underlapping edge thereof to better retain the fuel thereon.

By a reciprocation of the connecting-bar E it is obvious that coal or screening or other fuel placed upon the inclined grate E will be intermittingly carried along down the same in the progress of its combustion and finally deposited upon the grate I). This grate D is preferably made with its bars running from front to rear and is constructed to drop at its front edge when desired in order to allow of its being cleared. To this end it is provided with hinges d at its rear edge, and with hinged legs cl beneath its front edge. By pushing the legs backward the grate will be allowed to fall, and by pulling them forward the grate may be raised. A verticallyslotted bar D is located at the front edge of the grate D to afford better air supply to the fire-bed resting on the grate D, and in the-present instance said bar D, being fixed in the setting, also forms the support for the lower ends of the inclined bars E, upon which the rocking-grate bars 6 6 rest.

The lower part of the magazine or hopper F is provided with an inwardly and outwardly movable front piece or follower F, hinged to the ends of the hopper at f. To the lower part of this follower is loosely attached abot tom plate F which shares the inward and outward movement of the follower, and which forms a sliding bottom of the magazine. The inner edge of the bottom plate F in this instance rests and slides upon the horizontal portion g of the fixed plate G, and when the plate F is retracted said horizontal part g of the plate G forms a continuation thereof and part of the bottom of the hopper. In the present drawings, the bottom plate F is connected with the hopper-plate F by being made to rest upon an inwardly-directed flange f in which are set pins f that rise loosely through holes in the bottom plate. Other suitable forms of connection will obviously serve the same purpose.

The action of the vibrating front plate F and movable bottom plate F is, first, b 5 their retraction to allow the fuel or screenings to fall in the lower part of the hopper, and, second, by their forward movement, to force the fuel through the passage f upon the inclined grate E. The shelving and inclined portion g of the plate G overhanging the adjacent grate-bar e insures the proper delivery of the fuel from the hopper to the grate.

J is a rotating horizontal shaft supported in brackets j beneath the magazine and substantially in the inclined plane occupied by the connecting-bar E of the grate E. Upon the shaft J, as shown in Figs. 1, 2, 3, 4, 8, 8, 9, and 10, are fixed two eccentrics J and J the former of which actuates the reciprocating bar E through the medium of the pitman or eccentric rod j, and the latter of which vibrates the hopper-plate F through the medium of the rod J The rod J 3 is preferably provided with a gab or downwardly open notch 7' for its engagement with a pin f on the end of the plate F, and a handle j by which it may be lifted out of or dropped into engagement with said pin at pleasure.

The shaft J is shown in Fig. 2 as having a driving-pulley J for its rotation; but this is to be understood as typical of any known or preferred form of driving mechanism.

It is proposed that, as in the slow rotation of the eccentric shaft J the hopper-follower F presses the fuel forward into the furnace, the grate-bars eshall simultaneously tilt from their horizontal position (seen in Fig. 6) toward that shown in Fig. 5, so that the fuel entering upon the top of the inclined grate shall slowly force the mass already upon said grate toward the grate D. This end is obviously effected by proper adjustment of the eccentrics on the shaft J.

In Fig. 13 other and preferable forms of connections with the shaft J are shown for operating the movable hopper-plate and the rocking bars of the inclined grate. In this figure but one eccentric or disk-crank J is used. This crank or eccentric is connected by a rod j with a vibrating vertical arm J which is here shown pivoted at its upper end to the vibratinghopper-plate F near the pivotal line f of said plate, but may be pivoted elsewhere. The reciprocating-bar E is connected with this arm J at asuitable point by means of a connecting-rod E, which desirably passes through a slot c in the arm J and is provided with jam-nuts on opposite sides of said arm, as shown, for adjustment of the devices, if desired.

A screw J", secured to the vibrating plate F,

and provided with a hand-wheel J and an inner nut J are suitable means for det-achably securing the arm J either rigidly or with a lost motion to the hopper-plate F, and to adjust the extent to which said plate F will be I thrown by the crank-shaft J.

The passage leading from the hopper F to the furnace may be varied by means of a slide f, Fig, :1, and the speed of the shaft J, when run by power, may be regulated to give any desired rapidity of fuel supply to the grates.

The hood or arch H, which overhangs, proj ects backwardly from the front wall of the lire-box, and the upper portion of the inclined grate covers what may be termed the cokingspace of the furnace. The fuel on. that partof the grate it not covered by the hood II, and that beneath the lower or inner edge of the hood, will commonly be in an incandescent stage of combustion and the gases emitted by the coal or screenings being coked beneath the hood are conducted downwardly over and in proximity with the fire and ignited. The forward direction of the arch I over or into proximity with the hood II insures the eommingling of all the elements which enter into combustion, including an adequate supply of air admitted beneath and through the grates, and the result is that as such of these elements as are still unconsumed pass through the contracted space 0 combustion thereof is there finally and completely effected. The indirect course of the gases tends also to retard their 'irogress, and thereby to further insure their proper combustion before their escape, while, since. the hood II proceeds from the front wall of the tire-box, the flames are permitted to strike the extreme front end of the boiler. In the operation of the inclined grate E, composed of rocking transverse bars 6, the fuel is fed downward over the grate with regularity, the angle of inclination of said grate being such that the fuel does not slide suddenly forwardly thereon, and the varying backward and forward motions of the grate-bars operating in connection with gravity being such that the fuel practically moves almost equally fast whether the bars e be roekin g in one direction or the other. In either movement of the bars c the bed of fuel is being constantly broken the construction of the inclined grate. So, also, other forms of connections may be employed to give the desired movements to the inclined grate-bars.

Certain features of construction, illustrated in Fig; 13, are made the subject of aseparate application for patent, executed March 26, 1889.

I am aware of the construction shown in Letters Patent to F. Schaffer, No. 233,90a, and in Letters Patent to G. E. Palmer and others, No. 251,792, which severally show the rear wall of the feed-hopper or.feed-hole inclined backwardly and downwardly and overhanging to a slight extent the extreme upperbars of an inclined grate, and disclaim such construction of a hopper. The arch or hood II, herein shown, is no part of the feed-hopper, but is an overhanging wall of a cokingchamber distinct from the hopper and wholly within the furnace proper.

I am also aware of the construction shown in said patent to Palmer and others in which a nearly-vertical bridge depends from a point well back in the roof of the fire-box to a point over the extreme lower end of an inclined grate. This, also, is not my invention. The arch or hood ll, herein shown, proceeds from the front wall of the tire-box and extends downwardly and rearwardly over only about half of the inclined grate and substantially parallel therewith, giving space beyond it for an extended body of incandescent fuel upon the same inclined grate, and also permittin the heat to act directly upon the ex.- treme front portion of the boiler by passing back over the arch II to the front wall of the fire-box, from which said arch proceeds.

I claim as my invention 1. The combination, with a furnace firc box provided with an inclined grate, of an arch projecting from the front wall of the fire-box above the grate and extending in a position substantially parallel with the grate over the upper part only thereof, and forming a coking-chamber practically distinct from the hopper and over the head of the grate only, while the lower part of the same inclined grate beyond the arch affords room for a bed of incandescent fuel. external to the cokingchamber, substantially as described.

2. The combination, with a furnace firebox provided with an inclined grate, of an external feed-hopper arranged to deliver upon the extreme upper end of the grate, an arch or hood II, projecting from the front wall of the lire-box over the grate and extending rearwardly and downwardly over the upper part of the grate and forming an interior coking-chamber practically distinct from the hopper, and an arch I, projecting forwardly from the rear of the fire-box above and clear of the arch H and terminating forward of the rear margin of the said arch II and at a dis tance from the front wall of the firebox, substantially as described.

3. An inclined furnace-grate composed of a IIO series of rocking transverse non-fingered bars having wide and fiat upper surfaces and provided with trunnions which rest upon suitable supports, said rocking bars being arranged with the rear edge of each bar overhanging the front edge of the bar beneath it, with a vertical space between the lapping portions of adjacent bars to allow of the desired rocking motion, and altogether forming a series of horizontal steps or shelves adapted to be tilted on their trunnions to advance the fuel, substantially as described.

4. An inclined furnace-grate composed of a series of transverse bars having fiat and broad upper surfaces mounted in position wherein the rear edge of each bar overhangs the front edge of the subjacent bar, a vertical space being provided between the overlapping portions of the bars affording room for the desired rocking movement, and the front edges of the underlapping bars being provided with an upwardly-projecting rib, substantially as shown.

5. The combination of an inclined grate composed of transverse rocking bars provided with depending arms 6 a magazine arranged to feed upon the upper end of the grate and provided with a vibrating follower, a rotating eccentric or crank-shaft, a bar E connecting the grate-bar arms 6 a pitman connecting the crank or eccentric with the bar E and a connection uniting the crank or eccentric with the vibrating follower, substantially as described.

6. The combination, with an inclined grate composed of transverse rocking bars and a magazine arranged to deliver upon the upper part of the grate, and having a vibrating follower, substantially described, of a rotating eccentric or crank-shaft, an adjustable connect-ion of the crank or eccentric with the magazine-follower, and an adjustable connection of the crank or eccentric with the gratebars, substantially as described.

7. The combination, with an inclined grate having movable bars and with a magazine arranged to deliver upon the upper part of the grate, and provided with a vibrating follower, of a rotating crank or eccentric shaft having actuating connection with the gratebars, a. vibrating vertical lever, as J", Fig. 13,

an adjustable connection of said lever with the follower, and an actuating-connection of said crank-shaft with the vibrating lever, substantially as described.

8. The combination, with the rocking bars of an inclined furnace-grate and a feed-magazine provided with a vibrating follower, of a rotating crank or eccentric shaft, a vibrating vertical lever, as J Fig. 13, an adjustable connection of said lever with the follower, a connection of the lever with the crank-shaft, and an adjustable connection of the crank-shaft with the grate-bars, substantially as described.

9. The combination, with the rocking bars of an inclined grate and with a feed-magazine provided with a vibrating follower, of a rotating crank or eccentric shaft, a vibrating vertical lever connected with both the follower and with the crank-shaft, and an adjustable actuating-connection of the crankshaft with the grate-bars, substantially as described.

10. The combination, with an inclined furnace-grate having transverse rocking bars, an elevated magazine, and a fixed cross-plate at the head of the grate, ofa follower located opposite the feeding-opening of the hopper and pivoted at its upper part, and a bottom plate of the hopper flexibly connected with the follower and resting movably upon said fixed plate, substantially as described.

11. The combination of an inclined furnace-grate, a pivoted foot-grate D, located below the level of the lower end of the inclined grate, and a fixed vertical grate or slotted bar D beiwe 3n the inclined grate and the foot-grate, substantially as described.

In testimony that I claim the foregoing as myinvention I affix my signature in presence of two witnesses.

\VILLIAM R. RONEY.

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