US158279A - Improvement in grates for furnaces - Google Patents

Description

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Grates for Furnaces.

Patented Dec. 29,1874.

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UNITED STATES PATENT Qrrrcn.

REUBEN A. HUTCHINSON, OF JERSEY CITY, NEW JERSEY.

IMPROVEMENT IN GRATES FOR FURNACES.

Specification forming part of Letters Patent No. 158,279, dated December 29, 1874; application led August 7, 1874.

To all whom it may concern:

Be it known that I, REUBEN A. HUTcHrN- SON, of Jersey City, in the county of Hudson and in the State of New Jersey, have invented certain new and useful Improvements in Grates for Furnaces, Ste.; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this speciiication, in which- Figure l is a plan view of the upper side of my improved grate-bars as arranged for use. Fig. 2 is a like view of the lower side of the same; and Figs. 3 and 4 are vertical sections upon the lines x x and z z, respectively, of said Figs. l and 2.

Letters of like name and kind refer to like parts in each of the figures.

My invention is an improvement upon a class of grate-bars which are used more especially in furnaces for boilers; and it consists principally in a series of bars, having their upper bearing-surfaces grooved diagonally, and the grooves of contiguous bars arranged at an angle to each other, substantially as and for the purpose hereinafter specified. It consists, further, in the peculiar construction of the pivotal bearings for the rocking supporting-frames, substantially as and for the purpose hereinafter shown. It consists, iinally, in combining, with a series of longitudinally-reciprocating grate-bars, a series of stationary bars placed at each end of the lire-box, and overlapping the ends of said movable bars, substantially as and for the purpose hereinafter' shown and described.

In the annexed drawings, A and A represent a series of grate-bars, having the usual form, except that their upper surfaces are grooved dagon ally, and said grooves arranged so that, upon contiguous bars, they have an angle to, instead of a line with, each other. For a short distance near each end of said bars the grooved upper surface is removed, for reasons hereinafter explained. The grate-bars A and A are, preferably, combined in sections of threebars each, but, it' desired, may be used singly. Upon the lower side of each bar, near each end, is formed a transverse half-round socket, a, which corresponds to and rests upon the upper edge of a frame, B, that extends transversely across the ash-pit C, and at its lower end is pivoted so as to be capable of imparting an oscillating movement longitudinally to said grate-bars. Two pivoted frames, B Vand B, are provided at each endl ofthe ashpit, and the lengths of the grate bars or sections varied so as to enable alternate bars or sections to rest upon the same frames, the result being that a movement of either pair of frames will give motion to but one-half of said bars or sections.

In order that all the grate-bars may be moved simultaneously a T-shaped lever, D, is suitably pivoted, near or at the front of the ash-pit C, in such position as to bring its longer arm d outward, and its shorterarms d andd in a line at a right angle to that of said bars. To each of said arms d and d is pivoted oneend of a rod, E, which extends rearward, and is pivoted to or upon one of the frames B, while within the forward arm d is provided a socket for the reception of a shaker-bar. F. As thus arranged it will be seen that, by moving the shaker-bar F laterally, in opposite directions, the frame-bars B and B, and the bars or sections A and A resting thereon, will be caused-to reciprocate simultaneousl y in relatively opposite directions.

As seen in Fig. 4, each frame B is made horizontal at its upper side and vertical at its ends, while from the lower portions of the latter an arch springs upward and across, and at its longitudinal center is joined to the contiguous portion of said upper part. This form gives great strength to said frames, and prevents them froin becoming obstructed by an accumulation of ashes or clinlrers within the ash-pit.

In order to prevent obstruction to the pivotal bearings b and b of the frames B and B, the lower sides of the same are left open, as seen in Fig. 3, and they rest uponpins or studs c and c that project laterally inward from the sides of the ash-pit (l, the result being that ashes can find no lodgnient.

At each end of the grate is provided a series of short stationary bars, A and A', which slope inward and downward, and extend over the plane portion of each bar A, and also between the ends of the contiguous bars, although the last-named feature. is not essential. The

office of the stationary bars is to form a housing or covering for the ends of the movable bars, so that the latter may not become obstructed.

My grate is now complete, and possesses the following advantages: First, by grooving the bars diagonally, and arranging the grooves ot' contiguous bars at an angle to each other, 11o obstruction is offered to the use of a slioer77 for separating the coal and clinker from said bars, while the grinding action of the grooved edges as they move in opposite directions effectually break any clinker that may have formed between the same. Second, the construction of the pivotal frames affords the greatest strength, and prevents obstruction to the ash-pit. rIhird, the means employed for imparting a reciprocating motion in opposite directions to the bars or sections is simple, efficient, and convenient, and is not liable to get out oforder. Fourth, by providing the stationary bars at the ends of, and immediately above, the movable grate-bars all liability to obstruct at such point is avoided, and the free working ot' the latter insured.

Having thus fully set forth the nature and merits of my invention, what I claim as new 1s- 1. In a furnacegrate, a series of grate-bars, having their upper surfaces grooved diagonally, and the grooves of contiguous bars arranged at an angle to each other, substantially as and for thev purpose specified.

2. The pivotal bearings b and b of the frames B and B, made open at their lower sides, and resting upon and combined with the studs c and c, in thel manner and for the purpose sub-

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