US1563930A - Ash support for mechanical stokers - Google Patents

Description

Dec. 1, 1925- 1,563,930

\ R. s. RILEY ASH SUPPORT FORMECHANICAL STOKERS Filed Jan. 29. 1924 2 Sheets-Sheet 1 I N VEN TOR. E0552?" 5. fE/LE) Dec. 1 1925- 1,563,930 R. s. Rll EY I ASH SUPPORT FOR MECHANIAL STQKERS Filed Jan. 29. 1924 2 Sheets-Sheet 2 JNi ENTOR.

HOBART 6. R/Lz Y Patented Dee. l,

UNITED STATES PATENT OFFICE.

ROBERT S. RILEY, OF WORCESTER, MASSACHUSETTS, ASSIGNOR T $ANFORD RILEY STOKER COMPANY, OF WORCESTER, MASSAGHUtBETTS, A CORPORATION OF MASSA- GHUSETTS.

ASH SUPPORT FOR MECHANTCAL s'lOKERs.

Application filed January 29, 1924. Serial No. 689,359.

fl '0 all whomit may concern Be it known that 1', Rosnu'r S. RiLnr, a citizen of the United States, residing at d orcester, in the county of Vforcester and State of Massachusetts, have invented a new and useful Ash Support for Mechanical Stoker's, of which the following is a specification.

This invention relates to a mechanical Stoker andpartieularly to improved devices for supporting and agitating the ash and refuse at the rear of the stoker and for preventing the formation of clinkers upon the rear or bridge wall of the stoker. The

' invention is shown as applied. to a comlnercial underfeed Stoker of the type shown in applicants prior Patent- No. 1,822,822, issued November 25, 1919.

The general object of my invention is to provide an ash supporting grate beyond the refuse dumping devices in a mechanical Stoker, together with suitable i'uechanism for giving such a grate repeated raising and lowering movements.

My invention also comprises novel sup- POI't iHg and air supplying means for such a grate. By thus supporting and agitating the ash and refuse adjacent the bridge wall and by supplying air under pressure thereto, ii. are able to more completely consume the combustible material in the refuse and to largely prevent the formation of clinkers on the bridge wall.

Further features of my invention relate to combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A. preferred form of the invention is shown in the drawings, in which Fig. 1 is a sectional side elevation of my improved ash support, together with certain associated parts of an underfeed Stoker;

Fig. 2 is a fragmentary front elevation of the ash support and its operating means;

Fig. 3 is a fragmentary sectional elevation taken along the line 3-3 in Fig. 1;

Fig. 1 is a side elevation of one form of operating mechanism for moving my improved ash support; and

Fig. 5 is a detail plan view of a portion of the operating mechanism.

Referring to the drawings, l. haveindicated a dumping plate mounted at the rear of a stohern'et r a portion o the le l side wall being indicated at 11. The plate lhese parts may be constructed and operated exactly as shown in my priorPate-nt No. 1,322,822, to which reference is made for a more complete description.

The usual bridge wall is indicated at and is shown as supported upon a. pair of I-beams 16 spaced apart to form an air chamber 1'4". A series of heavy castings 18 are secured to the Lbeams andsupport the front portion of the bridge wall 15, as clearly shown in Fig. 1. The lower portions of the castings 18 are provided with segmental guideways 19 (Fig. 3) and with suitable air openings 20 between each pair of guideways.

Ash supporting grates 21 are provided with depending arcuate supports 22, the upper concave edges of which fit between the guideways 19, the lower convex portions of which are provided with rack teeth 23. The supports 22 are of hollow construction and not only uphold thegrates 21 but'also provide connecting air passages 22 between the outlets 20 of the air chamber 17 and the grates 21. An opening 22 in the concave upper face of each support 22 registers with an opening 20 in the air chamber 17 when the parts are in normal operative position but is closed off when the grates 21 are lowered to dumping position.

Operating pinions 2 1 are mounted on a shaft and engage the rack teeth 23 upon the different grate supports 22. The tooth spaces of the pinions 24: are indicated as cut away or bevelled (see Fig. 2) to prevent the accumulation of dirt or ashes therein.

which air will be conveyed. to the refuse .supported thereon, while the direct entrance crank 32 is connected by a link 34 to ahead 35 having a bearing 36 for a crank pin 37. Thecrank pin 37 1s regularly rotated and maybe mounted on the endof the crank shaft which drives the coal feeding rams, shown in my prior PatentNo. 1,322,822.

As the crank pin is rotated, motion is transmitted through the link 34:, the bellcrank 32 and link 31 to oscillate'the arm 30 about the shaft 251 A hand wheel 40 is loosely mounted on the end of the shaft 25' and the adjacent faces of the hand wheel 40 and thearm 30 are provided with clutch teeth adapted for engagement by asliding clutch collar 41 keyed on the shaft 25. lVhen the collar ismoved to the right into operative position in Fig. 5 the refuse supportinggrates 21' will be regularly oscillated or given limited up and down movementb the-automatic mechanism shown in hen the clutch collar is moved to the left, the refuse supporting grates 21 may be moved to any'desired position manually.

It will be understood that the automatic movement of'the grates isof limited extent, so that the'refuse supported thereby is agitatedbut is not'permittedto' escape past the grates 21 or the plates 10 tothe ash pit. lVhenthe refuse is 'to'be dumped, the grates 21 may be swung downward manually to the extreme position indicated in dotted l111QS'iIfF1gL1, onthe refuse'may be dumped by moving the rack bars 13' forward'and allowing the dumpingp'lates10 to swing downward; If desired, a combination of these two movements may be used.

The provision ofanair admittingrefuse supporting grate not only assists in consuming the last remnants. of" combustible material? in the refuse but" also, by" contin ually agitating the; refuse adiacent' the bIlClQ'G wall, these gratesipractically' prevent theformation of clinkers upon the bridge wall, a most desirable: result. 2

Having thus described 'my' invention. and theadvantages thereof; I do not wish to be limited to the details herein disclosed" otherwise than: as set" forth" in the claims,but

what I claim is 1. Ina stoker, a movably mounted refusesupporting grate, means to give said grate repeated limited raising and lowering movements to agitate the refuse while said grate remains in operative ash-supporting position, means to give said grate anadditional lowering movement away from ash-supporting posltionato'discharge refuse therefrom, and means to supply air under pressure to said grate during' its-limited movements and so long as it remains in ash-supporting position and to cut off the air supply during 1ts additional lowering movement and so long as said grate is in lowered position.

2. Ina stoker, a movably mounted refuse supporting grate, automatic means to give said grate repeated limited raising and low-' ering movements to agitate the refuse while said grate remains in operative ash-supporting position, manual means to give said grate an additional lowering movement away from ash-supporting position to discharge refuse therefrom, and means to supply air under pressure to said grate during its limited movements and so longas it remains in ash-supporting position and to cut off the air supply during its additional lowering movement and'so long as said grate is in lowered position.

3; Ina stoker, a refuse dumping=- device, a refuse supporting grate positioned beyond said dumping device and mounted. for oscillating movement, automatic means to 0s cillate said grate while in ash-supporting position, means to dump said grate, and means to supply airunder pressure to said grate in every operative ash-supporting position thereof, and during said oscillating movements, the supply of air being interrupted when the grate-is lowered to dumping position.

4. In a stoker, a bridge wall, a casting fixed in said bridge Wall and having arcuate guide-Ways formed therein, a. refuse-supporting'grate having a depending arcuate supporting portion fitting said'guide-ways, said supporting portion being movable therein to carry said'grate to and from ashsupporting position, and means to supply air under pressure to said grate in every operative aslrsupporting position thereof,

said grate being movable downward and' rearward" beneath said bridge wall for dumpingthe refuse.

In testimony whereof I affixed my signature;

ROBERT S. RILEY.

have hereunto

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