US1333732A - Furnace-front and valve mechanism therefor - Google Patents

Description

- J. REID.

FURNACE FRONT AND VALVE MECHANISM THEREFOR APPLICATION HLED NOV. 2. 191a.

1,333,732. I Patented Mar. 16, 1920.

2 SHEETS-SHEET I.

km N/GJTKOFQDAC 25 bm y 1 Nflkamey i J. REID.

FURNACE FRONT AND VALVE MECHANISM THEREFOR. APPLICATION mwnov. 2,.191

Pat-entd Malt-l6, 1920.

v 2 SHEETS-SHEET 2- I. mm 3.311),, on NEW Yemen.

Tacit whom mag 'concern." r aB'ezit known that I, JOHN REID, ja subject of the King of Great Britain, and residing at 30Church street, in the city ofNew York,

"in the State of New Yorlq i'n the United v States=of America, have invented new, and

' useful' Improvements in Furnace-Fronts and passage door.

Valve Mechanism Therefor, of which the following is the specification.

The'inven-tion relates toimprovements in 'furnace fronts and valve mechan sm there-" for, as :(lBSOI'lbBd n the present specification and shown in the accompanying drawings that form part-of the same; I

, The invention consists essentially Of2th6 '.novel: means employed, whereby efficient 1 operation 'ofthe valve mechanism is maintained and whereby-r valves operate coincidently with the movements of the feed The objects of the invention arel to furnish smoothand uninterrupted operation of the air and draft system in marine and other furnaces-to insure the accessibility of the iceable, durable and parts and their-convenient manipulation by the attendant; to assemble the component pieces, so as to standardizethe whole with. the furnace front,to eliminate the-danger incident-to certain draft' conditions and open feed door and generally to provide aserveasily operable valve mechanism.

In the drawings, Figural. is an'elevation of the back plate showing the fuel passage and ash pit flare in cross section and a plan 7 of the valves and operating gear. I

Fig. 2 is' an enlarged detail of. the valve plate and fastener parts showing the crank wlugs as'part of the latter and the connect- 12 rod broken aw y;

Fig. 3'is an enlarged longitudi al Sea-m1 detail of the parts operated by the valve 2 handle. and the connecting rod the latter squared shaft showingthe crank and conbroken away. o I

.Fig; 4 's a cross sectional detail of the meeting rod, the latter-broken away.

- Fig. 5 is an elevation ofthe furnace front 1 plate, showing the latchibar of the fuel passage door and .the jstop operatedcoincidently with thevalve handle. f Like; numerals of reference indicate cor-' d responding partsin' each figure Referringto the drawings, the front plate fuel o ening 8. i

URZfifACE-EEBONT VALYEMEQH REFOR.

specification of L cttersjPatcnt. V Patented Mar; 1 6, "Application filed November? i "1918. Serial m. 260,883.

The ash pit opening 2 communicates with .the furnacefproper' through the passage, 5

and acorrespondingopening in the back Platefi. I

terminates at the fuel opening plates, and has suitable outlets throughsaid back plateljThe fuel passage. is surrounded by thewall'i' and the air passage Shy the.

walls. Thexash pit fla-re completes the main frame of the furnace front, though I the precise construction is'inot necessary for the successful operation of this invention] The' catch 9' is formed adjacent to the .door opening 10at one endthereof and the hinge members 11 at the other end. f'

The door '12 with corresponding hinge members 13 is heldto the hinge members '1 I,

by the rod l land closes the door open ing 10. V

The latch'hbar 15 is secured to the center" of the door 12'by the pivot 16 and is-adapted to lock in the catch 9 and beyond said catch Pu poses. 1: 1

is formed'iinto the hook ofi'set 17 for opening-" The stop-18 is secured to,-or forms'iparto with the square shaft I 9,-, the latterter-minating' inythe threaded end'20. The bushing 21 having a square hole corresponding to the shaft 19 is mounted thereon and journaled in the orifice'22 i'n the front plate 1 adjacent to the latch bar 15, so that in turning; the stop 18 moves over and beyond theend of thelatch bar 15.

lever {section 24 with a square orifice 25 corresponding to the square shaft 19' and is V The "handle 23 isformed iat theendofits 7 Theleversection 24: 'tr a'vels over an arcshaped track 26, at ea'ch' end of which are the stops 27 and 28 said trackand said stops being'preferably cast with the front plate 1. p The crank 29'is mounted' on said square pivot bearings. e The nut 31 is mounted on the threaded end 20 and the spiral spring 32 encircles the shaft 19 inside the front plate 1 which it l V abuts, and has the forked, end 30 forming shaft 19between the nut 31 and the crank 4 29,-consequently the shaft 19 is constantly drawn inwardly, which maintains the bushing in its journaling and keeps the valve handl'e close to "the front 1. f ,p I

The connecting rod 33 is p lly s c d i reference to the" drawin in the forked end 30 of the crank 29 and is formed with the turnbuckle The shaft 35 is journaled beneath the dooropening 3 and extends through the air passages 8 and carries the plates 36 and 37 forming valves which are rigidly secured to said shaft. V

In securing the plate 36" to the shaft the block 38, longitudinally grooved at 39 to receive the shaft, is placed against the underside of the plate-36',andthe cover plate against the upper'side immediately over said block 38, so that the bolt holes 40:: are

--in alinement with the boltholes- 4L The bolts 42- are thenwinserted through cover plate 39, valveplate 3i6and block. 38,.en-

gagingthe shaft 35 in, the grooves 43, and

are fastened by the nuts 44;

A similar block 451 a is placed against the bottom of the plate 37 andis. held-by the bolts 46 also engaging grooves 4'? in the shaft: and"extending'through the cover plate 48, said cover plate 48 having the-parallel lugs 51 and 52 forming pivot bearingsfor the lcwcr-endwofthe connecting rod 33.

The valve plates 36 and 37 are further secured to the shaft 3-5 by the U-bolts53 and. nuts 54, said bolts extending through the clainpingplates 55 a In the operation of this invention, the valve plates as shown control the flow of air to the fire box, otherwise the draft for stimulating: the fire and bringing the fuel to astate of incandescence. 'These plates, being fixed to the shaft as shown and the latter journaled so as to project through the air-passages, shut off the said passages, when turned to an oblique position against the walls. 40

' The connectingrod attached to the crank formed by the valve fastener coverwith the parallel lugs is operated by the movement ,ofthe valve-handle traveling; over the areshaped traplr' on the; furnace front; The swinging of this handle to one end of the track the valves and to theothcr end opens the valves, as. willreadily-be seenbv V and thedeta d description of the parts he ,einbefore.

The swingingqof'thezhiandle isaccompani-ed by the rotation ofthe stop the r latch and in turning the crank shaft for clos ng the valves; the stop moves away from said latch leaving the door free to open, but-"so-long; asthe'valves' are in their open; Positions, the stop will, stayin front of the latch bar and frustrate-"any attempt p n the-doom t e efore no tongue of tl'anae will reach out of the/furnace door 7 opening, which isa great protection to the stokers, berause 1f the draftwas Inamta ned during; the door opening-act, the chances are i the. stolrenwonlt be badly burned,

In this invention the course; Oftheair is precisely the same a many-knew yp of forced draft furnace fronts particularly of the Scotch type and briefly it may be pointed'outthat the air is forced in at 60 andhl' above the side Y ilves 36 and 37 respecti'vely and flows" througlr the ports opened by said valves into the ashpit and on to the underside of the grate in the same manner any air drafti Thetop valve cl'osesports to the air chamber around the fuel passage andsflows, to the baflies, and through theholes to the firebox ensternary. V

,iVario'us. changes lnayche macle in the con structlon ofthe several parts and:ther-r arrangen'ient, so long as they remainwithin the other, a crank shaft journaledi in the upper portionof said frontplate above the I plane of the said valves and havingan operating; handle at its outer end, a crank on said crankshaft, a rod: extendingdownward-1y from the crank andoperatively' connected to the same andsto one ofthe valves for opening andclosingr' the latter, a door closing" the frontendof' the said passage,

a latch bar pivotally secured on said door,

and a stop rigid with the-crank shaft and movable to: and from a position in. front of the latch bar and arrangedto; loclnthe latch" bar coincidentally with: the opening of -the valves; a

2. In a furnace front and valve mochanis1n therefor, a main framecoinprirsinga front plate, a back plate, a fuel" passage 'wall spacing and connecting said plates: and

an ash pitvflare, plates forming; air passages to the ash pit,"avalve-shaftvjour nal'ed'below said passagewall, valves,v filir'edly mounted on said shaft andwith said passage 7 wall dividingthe interior of the frontinto upper and lower portions, fuel door,- a latch bar for said fueldoor, a crankshaft journaled inthe front p latc above the plane of said valves, I cranks, mounted the crank shaft and the'valve' shaft, a rod" operatively= connecting the sai-dn cranks for oz zrenin-g closing; the valves, an" operating handle mounted: on the crankshaft; and

a: rotating stop, carried by the crankshaft and engaging:andidisengagings'the latch bar: and arranged to 1GOk l1hG' latch barzwhen the valves arcqopen andreleasethe latch bar when the valves are closed? f I 3; In a furnace frontfanclj nism therefor, a main frame com rising a frontplate, a back plate-and a uelp'ass sagev wall'havin g a fuel passage, adoorto" said; passage, a latch bar mounted on said door, a lotatable'stop engaging the latch 'Ibarfa square shaft extending inwardly through the front plate and carrying the said stop and provided with a handle, a

bushing mounted on said shaft and jourt1vely' connected with one of the valves,

and a rodconnecting thecranks' for opening and closing-the valves, the said stow being arranged to engage the latch bar when. I H the valvesare open and to release the latch V 'barwhenthe valves' are closed. g 4. Ina furna'c e front'and valve-{rriechanism therefor, a main frame comprising a and 't'e val've shaft. 1

,jfrontfliilate,jfa hacki platega .fuel pas age Qwall, having "a fuel ,lpassage', said plates [forming-air passage's to the ash pit, a door closing said] fuel' pas'sage, a latch bar 'mounted on said door, a valve shaft journa1edbelowsaid fuel passage, valvesnio'untg {ed on said shaft and operatin in the air passages, a. square crank sha t journaled in the front plate aboveivthe plane'of the" valve and adjacent and in proximity to said latch bar, a stop carried by the crank shaft and movable ,into. and foutof engagement s r .with the latch b ar and arrangedto lock the latch bar when the valves are open'and to;

release" the latch bar when the valves are closed, a crank mounted on said. crank shaft,

spring between said nut. and crank, and a rod-o eratively connecting the crankshaft si ed at NewfYork city this 29th day of O0t0131918fi I 1 JOH-N- REID.

7 40 a-nut screw threaded on the crank shaft; a

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