US1872844A - Grate - Google Patents

Description

C. F. STREET Aug. 23, 1932.

GRATE Filed Feb. 21, 1929 ("zewerz/Z fi Lima l-EW- 00015 00 n 0000mm00000000000 m 0000000 00000000m 0 m 00000000000000000" 0 n 00000000000000000W 00000000000000000 i n ,5! 00000000000000000 m N 00000000000000000m n m 0000000 00000000 00000000000000000+ m lllnvnl I I l 1 L Patented Aug. 2 3 I932 UNITED STATES PATENT omen OLEMEN'I F. STREET, OF GREENWICH, CONNECTICUT, ASSIGNOR 'IO AMERICAN STEEL FOUNDRIES, OF CHICAGO, ILLINOIS, A CORPORATION'OF NEW JERSEY GRATE Application filed February 21, 1929.. Serial No. 341,685,

This invention pertains to grates, and more particularly to the dumping or rocking type onto the fixed type of multiple section grates used for locomotives. i

i There are special requirements for grates to be used, in locomotive service, which are peculiar-to that service alone and which must "be constantly borne in mind to produce successful devices. One is that the grates must be of sufficient width'to allow rapid cleaning of the fire. Another requirement is that they must be 7 so constructed as to allow those changesnecessary to permit the passage of "the properamount of air through the grates, as well as to so support the assemblies that in operation they will always remain in cer-. tain relative positions with respect to'each other. i

Due to the intense heat to which grates are subjected, the bars thereof are of course liable to rapid deterioration due to burning out.

Trouble is also encountered due to warping.

or twisting in expansion or contraction of the grate bars. This means that the grate bars must be easily accessible and readily removable to allow rapid repairs, because it will be easily understood that the demurrage charges on locomotives are enormous.

The more satisfactory grates now in use are quite expensive to install and maintain as they are usually made up of a great number of small parts,which parts per se become distorted, making it necessary to replace or repair a plurality of them. This is expensive due to the cost of the parts, the time necessary to make such repair and the tlme the locomotive is out of service due to th1s repair. It will also be appreciated that when one of these parts becomes distorted, it is often impossible to make adjustments 1n the air opening, which is so necessary to efiiclent operation.

sembly which permits rapid cleaning of the fire and changes of the grate bars.

.modified form of lockingdevice.

Still another object is to provi de-aigrate I 7 bar assembly which resists distortion, is read- 11y removable and is capableof rapid con-j verslon to provide different drafts to accommodate different fuels. L f

A still further object is to provide a grate assembly whereinthe grate members are secured to their supports by a minimum of parts, yet one which is so constructed that the I grate members will be effectively and securely kept in place. i

With these and various other objects .in' vlew, the invention consists of certain novel features of construction and operation as will be more fully described and particularly" pointed out in the specification, drawing and claims appended hereto. j V I In the drawing, wherein like reference characters are used to designate like parts- Flgure 1 is a top plan View of a grate assembly with one of the grate members removed, dotted lines illustrating the position of said member in operation; j Figure 2 is a longitudinalelevation partly insection of the grate assembly, 7

F1gure. 3. is a transverse sectional elevation of the grate assembly, showing one form of locking device? v Figure 4 is a transverse end elevation of the grate assembly; and i Figure 5 is a transverse sectional elevation, of the grate assembly, illustrating a I The supporting frame 10 of the grate assembly consists essentially of a pair of spaced parallel longitudinal ribs 11, preferably of horseshoe type the longitudinal ribs 11 being joined intermediate their ends by transverse integral ribs '13 of any convenient number, disposed at proper intervals. 'It

has been found highly desirableboth from a standpoint of strength and stiffness to form the longitudinal ribs 11 of substan T tially truss shape, as already described; that is, the longitudinal ribs may be shaped to have-their greatest depth adjacent the'center-thereof to afiord the necessary sustainingresistanceto the loads to be carried by'the assembly, and in this connection, may or may not be formed with a bottom reinforcing portion, all as particularly shown and described in applicants application Serial No. 212,739, filed August 13, .1927. The

longitudinal ribs arealso provided with a suitable number-of apertures depressions or other connections 14 for the application of the usual shaker arms. If, however, the supporting frame is otthe;fiaedjtype thev connectionsylazmayof course be omitted, but such structure, it will readily be perceived,

' will in no way affect the objects or purposes is 'to be used, only one plate may be neces' sary butin the usual locomotive assembly, ftyvollor more platesare preferably provided. Theplates 15 may be either, of the arcuate 'oi flflat type.and provided with a predetermined number of spacedholes or. apertures V 16 of a size to accommodate pmper cfombus 'tion,-, of the fuel for. which the; plate is de signed: vThese apertures are/located, in-

. -wardly "of transversely-V and longitudinally idispioseddepending fianges 17 and118, the

endiian es acent: the trunnions being e of V such a depth or such a disposition as to proy do wsemlply, permitting expansion andcontr-ao,

vide a seat 118 for the grate on the socket trunni n; I 2,- s pa r s r r QWnII i th righth n -p rtio 0tFig11re'2; The oppositelltfinsverse'fleinge; that is, theoneadjae t t ce ter of the semb y,; as hown in Figure 2, is of sufficient depthordispositifon' tog provide seatsi 218 on the longitudinal-ribs v 11, said fiangeQbeingQ provided iprefembiy n the outsideoi"; said ribs, with depending-lugs 20 disposed adjacent theribs. 11 and are for the purpose of cooperatingwith securing means .tourbe later described tokeepthe plates in place with respect to; f the {supporting means.-

V The grate plates, my also be provided with depending local ,securing lugs 21 dis- 7 posed intermediate the ends ofthe grate and adjacent longitudinal ribs '11. In ,the .mod-

- ifioationillustrated in-FigureB, these lugs are provided with aligned apertures 22' registeringwith aligned apertures 23 7 provided I in fthe longitudinally extending ribs, 11 "for the purpose of accommodating --a locking 'member, 24,1 which member .may take the form ofa headed bar provided with a, keyway adaptedto receive thelocking pin 26 for,rnaintaining said; bar in" position.

With such construction, it. wil1 be seen ribs; at pointsaligned transversely of. the asenlp t em lyy he igsf OL serving :as ge di g ean pe m t ngfis id expansion and contraction of the inner end of the grate plate, yet at the same time preventing warping, twisting or displacement of the plate depending lug 30, said lug being provided with an inwardly extending pin 31 adapted toibe positioned and'retained in the aperture 23:provid'ed inithe longitudinal v rib 11, it being understood of course that the lug 31 may be disposed on the rib 11 and positioned in with a dependingflug 32, said-lug being providedi with anfaperture 33, registering with aperture. 23 in the opposite rib 1 1', and insuch case; a short headed lockingbar 34; may be provided havingthekeyway 35 forjaccommdq datingthe lockinglieyfifi, a shim'or liner being provided between the locking pin and the lug-32 ifdesired, .for the purpose oftaking i-p the wearbetween said parts.= V

c, It will be; seen that with the constructions 'illustrated'and described that the grate assembly, may be easily taken down, changed or, repaired, it being onlywnecessary to move the locking pins fromgtheir respective 16a;-

ing bars; and removesaid. bars in which .case the plates may be lifted ofi frornthesupporting frames and repaired or replac sed};

It is to be understood that I do notwish-to H be limited 1 by the exact embo'diinent ofjithe ;devi'ce; -shown-, which is vmerely by waypf illustra-tioni. and not limitation, as variousand 7 other; forms of the-device will of; course-- be apparent to. thoseskilledin the art. I claim 1* a member being provided with depending members, securing;v -means -for fasteningfsaid depend-ing;;membe'rs: to. said spaced -memb ers,;,. and; other depending -\niembers provided- :On

said grate memberandgdisposedin cooperasaidgratemember ispositioned-thereom 1 2.;In-agrate assembly; thecombination ot a .supportincludingspaced; parallel members,

a grate member-providedwith depending end portions contacting-V with I and supported by said support, removable [meansiintermediate portions on one of said depending;;end-.-porti'onsv cooperating; with saidparalljed members for preventing; displacement of ;said a m t l that thegrates. arefixed tothe supporting aware mem er 1; "In a: grate assembly,- the combination a of a support'ancluding spaced. members, a grate member carried by"; said gsupport said; grate tive'relationltosaid spaeed members l-w hereby I 3. Inv a :grate assembly; the combination of asupport including spaced parallel members,

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