US845090A - Steam grate-shaker. - Google Patents

Description

.No. 845,090. :PATEN'II'ED FEB. 26, 1907.

w. H. HUGHES. STEAM GRATE SHAKER.

APPLIGATION FILED JAN.18, 1905.

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No. 845,090. PATENTED FEB. 26, 1907.

' W. H. HUGHES.

STEAM GRATE SHAKER. APPLICATION FILED JAN. 18, 1905.

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ATTORNEYS No. 845,090. PATENTED FEB. 26, 1907. W. H. HUGHES. I

STEAM GRATE SHAKER.

APPLICATION FILED JAN. 18,.1905.

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WILLIAM H. HUGHES, F BlRMINGHAM, ALABAMA.

STEAM GRATE SHAKER.

Specification of Letters Patent.

Patented Feb. 26, 1907.

Application filed January 18,1905. Serial No. 241,682.

- of Birmingham, in the county of Jefferson and State of Alabama, have made certain new and useful improvements in Steam Grate-Shakers, ofwhich the following is a specification.

My invention. is an improvement in apparatus for shaking pivoted grates or grate-sections. lt-is capable of general application in boiler and other furnaces, but isespecially useful in locomotives for freeing the grates thereof of clinkers and other toreign substances mingled with the coal. By my invention coal which carries a high per cent. of ash can be utilized without undue clogging of the furnace-arch, and slack coal can be 1 iainly consumed instead of passing throughthe tines in such quantity as to obstruct the net covering the smoke-box.

The details of construction, combination, and operation of parts are as hereinafter described, and shown in the accompanying drawings, in which- Figure 1 is a face view of my improved apparatus' applied to a locomotive firebox. Fig. 1 is a perspective view of a bearing for the rock or shaker shafts. Fig. 2 is a side view of the same. Fig. 3 is a horizontal section of one of the fluid-motor cylinders and its steam-chest, together with the connections between the piston-rod and the rock or shaker shaft. Fig. 1 is a transverse section of the distributing-valve teed inconnection with each flnid-motor cylinder. Fig. 5 is an enlarged face view of a portion of one of the fluid-motor cylinders and its valve-chest, together with the hand-lever mechanism for operating the distribnthtg-valve arranged in said valve-chest. Fig. 6 is a face view of the two finid-motor cylinders, together with the steam-pipe connections for one of them and the mechanism connecting its piston with the adjacent shaker-shaft. Fig. 7 is a vertical section fart her illustrating the connection between one of the shaker-shafts and the grate proper and also means for locking such shaker-shaft.

The drawings illustrate my invention as applied to a locomotive-boiler and rocking grate therefor; but, as before indicated, I do not intend to tlms limit its rise.

1 In Fig. l the locomotive firebox is shown with rocking grate-sections 2 and a drop or dump grate-section 3, the latter being arranged contiguous to the end wall of the firebox. It is to operate such grate-sections, or

others of some analogous type, that my invention is applicable.

1 arrange two vertical rock or shaker shafts 4 and a on opposite sides of the aforesaid ,door 1, the same being journaled in fixed bearings 5- and 6,,secured to the end of the fire-box. Each of these rock-shafts is provided at its lower end with a lateral arm 7, one of which is connected by a rod or link 8 (see Fig. 2) with devices depending from the movable grate-section 2, while theother arm 7 is connected by similar means (not shown) with a like grate-section. (F ot shown.) In other words, while a single rock-shaft may be employed for shaking a grate, Iprefer to en1- ploy two such shafts and to operate or rock them simultaneously for shaking separate grate-sections. For this purpose I employ the following mechanism, namely: two steam-cylinders 10 10, which are juxtaposed horizontally end to end and each provided with a slidable piston 11, (see Fig. 3,) whose rod '12. is connected with a lateral arm 18, fixed on the upper end of each rock shaft 4 and 4 As shown in Fig. 6, each of the fluid-motor cylinders is provided with trunnions 14, the

same being arranged oppositely on the upper and lower sides of each cylinder. As shown at the left in Fig. 6, the trunnions are journaled in bearings 15, the same being era tended laterally, as indicated in Fig. 1, and

bolted to the head of the tire-box. Each cylinder is thas adapted to rock or oscillate as required to operate in connection with the lateral arms 13 f the rock-shaft a. Each cylinder 10 and 10 is provided with a steamchest 16, in .which is arranged a distributionvalve 17, the same having a rod 18, (see Figs. 5 and 6,) which is pivoted to a vertical hanth lever 19, the same being pivoted at itsiower end 20. This lever works in an arc-shaped. keeper 21, which limits its throw in opposite directions. .It is apparent that l) vibrating said lever 19 the valve 17 will be reciprocated in the steam-chest, as required to govern admission of steam to the c linder t hrough the ports 22, (see Fig. 3,) the steam being thus alternately admitted and exhausted from each side of the piston, where. y the latter is rcciprocated and the rock-shafts a i oscillated for imparting a rocking movement to the grate-sections 2, as will bereadily understood. Steam is admitted to the steamchests by pipes 23,(see Fig. 1,) which are suitably connected with the steam-dome of hese pipes in turn connect withtheboiler. the trunnions 14 of the respective motor-cyl-v inders, the trunnions being hollow and suitable passages being provided in the walls of the cylinders for conducting steam to the opposite ends of the steam-chests, where it is introduced by openings 24:. (See Fig. 3.) The valve 17 is hollow or provided with a central longitudinal passage, so that the valve is balanced, steam being always present in the spaces at both "ends of the valve ,and under equal pressure thereinand in the valve itself. The central portion of the valve is cut out or hollowed to allow space for exhaust, which is effected through the port 25. It will be seen that the steam- ports 22 and 25 are arranged in a well-known manner and that as the valve is shifted from one end to the other of the steam-chest 16 steam willbe alternately admitted to and cut oilfrom the respective ends of the adjacent mo:

tor-cylinder, while exhaust will take place correspondingly. Pipes ZB Qsee Fig. I) are connected with thelower trunnions of'the the-shaker-shafts are connected may be rocked together or separately.

As shown in Figs. 1, 2, and 7, a locking device consisting of a lever-arm27 is pivoted to a lug on each of the rocking shafts 4 4, and is thus adapted to be placed in vertical position either up or down. When raised, as shown on the right handside of Fig. 1 and also in Fig. 2, the arm 27 is held or supported by a cl evis-like keeper 28, the same. being pivoted to the rockshaft. On the otherhand, when released from the keeper the said arm drops by gravity into the notch formed in the bearing or keeper 5, whereby the rockshaft is locked or prevented from rotating on its. axis, and thereby the grate-sections connected therewith are held steady in horizontal position. The lock is shown on the left in Fig. 1 and in Fig. 7; In case it is desired to shake the grate-scetions manually a lever may be applied to the arms 27 and term porarily clamped thereto, as indicated by dotted linesin Fig. 7. I such lever laterally or in a horizontal direcwords, dropped, to a Thus by vibrating tion a rock-shaft 4 or 4 may be rotated with the corresponding result of oscillating the grate-sections.

lowered to vertical osition, or, in other llow dumping at that point by the followin -described mechanism.

A sleeve 29 (see Figs. 1, 2, 7) is shown applied tothe right-hand shaker-shaft 4", and it is provided at its lower end with a lateral arm 30, which is connected by a link or rod 31 with that end of the grate-section 3 which is farthest from the end of the fire-box. A

lever 32 (see Figs. 1 and 2) is fixed on the upper end ofthe sleeve 29, and by moving the same horizontally in the proper direction that is to say, outward or away from the end of the fireboxthe sleeve 29 will be rotated on the rock-shaft 4 and the grate-section 8 thereby thrown down, as indicated in 'Fig. 2. When the lever is parallel to the face of the fire-box, assho'wn in Fig. 1, it may be held up by akeeper 33, or it may be allowed to hang vertical alongside the sleeve 29. Thus by comparatively simple means I am enabled to rock-'grate-ssctions by the admission of steam to the motor-cylinders or to dumpportio'ns thereof by the manipulation of the handa lever.

.What I claim i sbination of a shaker-shaft journaled in bearings on a fire-box and having upper-and lower arms, a fiuld-pressure-motor cylinder having a piston which is coupled to the-upper arm of the shaker-shaft, a link by which. the lower arm of said shaft is coupled. to a plurality of rocking grate-bars, a pivoted drop-grate, a sleeve fitted freely on the shaker-shaft and coupled tothe drop-grate, and a handdever coupled .to said sleeve for raising and lowering the drop-grate by movement of the sleeve.

2. In a grate-shaking a pliance, the-com bination of a shaker-shaft journaled vertically in bearings on the back head of a fire- 1. In a grate-shaking appliance, the combox, upper and lower arms fixed on said shaft, a supporting-plate fixed on the firebox andlcarrying vertical trunnion-bearings, a motor-cylinder having trunnions fitted in said bearings, a piston'and rod in said cylin-' der, a connection coupling the piston-rod to the upper arm of the shake'r-shaf t, a d istribution-valve controlling" the supply and;.e xhaust of motive fluid to and from the motorcylindenan operating-lever connected to the distribution-valve, and a rod or. link coupling the lower arm of the shaker-shalt to a rocking grate.

3. In a grate shaking appliance, the combination of a shaker-shaftjournaled vertically in hearings on the back head of a firebox, upper and lowerarms fixed on said shaft, a motor-cylinder fixed on the fire-box, a piston and rod in, said cylinder, means to IIS couple the piston-rod to the upper arm of the shaker-shaft, a distribution-valve controlling the supply and exhaust of motive fluid to and from the motor-cylinder, an operating-lever connected to the distribution-valve, a rod or link coupling the lower arm of the shakershaft to a rocking grate, and an arm fixed on the shaker-shaft and adapted for connection to a hand-operating lever.

4. In a grate-shaking appliance, the combination of a revoluble shaker-shaft journaled in bearings on the fire-box, one of said bearings being provided with a socket, upper and lower arms on said shaft, a fluid-pressuremotcr cylinder supported on the fire-box, a piston in said. cylinder coupled to the upper arm of the shaker-shaft, a link for connecting the lower arm of the shaft to a plurality of rocking grate-bars, a short intermediate arm fixed on said shaft, a stub coupled to said arm and adapted to engage the socket in said bearing and a hand-lever when not engaging said socket. 1

5. Ina grate-shaking appliance, the combination of a revoluble shaker-shaft j ournaled in hearings on a fire-box, one of said bearings being provided with a socket, upper and lower arms on said shaft, a fluid-pres- &

sure-motor cylinder supported on the firebox, a piston in said cylinder adapted to be coupled to the upper armof the shaker-shaft, a link for connecting the lower. arm of the shaft to a plurality of rocking grate-bars, a short intermediate arm fixed on said shaft, a stub coupled to said arm and adapted to engage the socket in said bearing, a stirrup on the shaft and adapted to receive said stub when not engaged in said bearing.

6. In a grate shaking appliance, the combination with a fire-box of a boiler, of a shaker shaft journaled thereto, a fire-door in said box, the upper end of said shaker-shaft extending above said fire-door, a fluid-pressure motor connected to said fire-box above the fire-door, means to couple said motor to said shaft to rock the latter, a plurality of rocking grate-bars, means to couple said bars to said shaft, means to lock said shaft, when not in operation, in position to hold said grate-bars horizontal, and means to shake said shakershaft by hand in the event of the failure of said motor.

WILLIAM H. HUGHES. Witnesses:

LILA LIVELY, B. T. MAXEY.

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