US742975A - Mechanical stoker. - Google Patents

Description

VJEATENTED Nov. s, 190s.

E.V F. EDGAR. MECHANICAL sToKBR.

APPLICATION FILED MAY 7, 1903- No MODEL.

inch in height.

vUMTED STATES' Patented November 3, 1903.

ELLIS EDGAR, OF WOODBRIDGE, JERSEY.

MECHANICAL STOKER.

SPECIFICATION forming part of Letters Patent No. 742,975, dated November 3, 1903.

Application led May '7, 190,3. Serial No. 155,975. (No model-l To a/ZZ whom it may concern:

Be it known that I, ELLIs F. EDGAR, a citizen of the United States, and a resident of Woodbridge, in the `county of Middlesex and State of New Jersey, have invented certain new and useful Improvements in Mechanical Stokers, of which the following is a specification.

Figure 1 is a sectional side elevation view. Fig. 2 is an end elevation, part in full and part with two end guide plates removed. Fig. 3 isa front elevation view in perspective at lines @c in Fig. 2, part in full and part with grate-bars removed.

My invention relates to a grate-bar for burning ne coal,'here shown mounted on an endless chain composed of links, for use in a rnechanical Stoker of the traveling-grate type.

1 represents links for supporting and carrying grate-bars; 2, axles for supporting and carrying links 1; 3, Wheels for supporting and carrying axles 2; 12, second vsprocketwheel for carrying around the travelinggratebar sections; 13, rst sprocket-wheel for carrying around the traveling grate-bar sections; 14, side of stoker; 15, track supporting the traveling grate-bar sections between the said sprocket-wheels; 4, end guide-plates mounted on and secured to links 1 for supporting grate-bars; 5, center guide-plates mounted on and secured to links 1 for supporting grate-bars; 6, lower grate-bar; -7, second grate-bar; 8, third grate-bar; 9, fourth or upper grate-bar; 10, projection from back of grate-bar 9, overlapping the end of grate-bar 6 to prevent the fine coal from falling through at this point; 11, beadingto prevent the coal from working back and falling down the airspace between the grate-bars; 17, the driving-rod, connected to adjustable slot 18 for operating feed-plunger 16; 19, feed-hopper for receiving the coal; 20, stationary grate at the end of traveling grate.

These grate-bars are made about one-halfV inch in thickness, with a surface on the top of about two inches wide by twelve inches long and the height of the bar from the carryinglinks, commencing at grate-bar 6, about one The top of grate-bar 9 will be about four inches in height from carryinglinks 1 and are made to be easily removed, y

from guide-plates 4 and 5, if necessary from either burning or warping.

It can readily be seen that a grate constructed in this manner when covered with fine coal the coal will drop down in the pockets between grate-bar 9 in the forward section on the top of grate-bar 6 and on projection 10 and on part of grate-bars 7 and 8, and the air entering the field of combustion must necessarily rise .between grate-bars 6 and 7, 7 and 8,and 8 and 9 through said pocket,

providing for an opportunity for a larger air- Y openin g than in usual forms of, grate-bar constructions for fine coal.

Operation: In starting the ire in the form here shown applied to a mechanical stoker the fireman would enter the furnace-door opening at the backV end of the traveling grate or over the stationary grate, place fine kindling-wood in the aforesaid pockets of several ofv the grate bar sections to the height of two or three inches above top of grate-bar 9 of the front sections lying next to the feed-hopper, then cover `with several inches of fine coal, light the same, and after the coal becomes incandescent start the stoker in operation, and as the grate begins to move the incandescent coal on the rear of the top of grate bar 9 will fallin the pocket of the next section as the grate-bar sections come from under the oor supporting plunger 16, and the length of stroke and speed of plunger 16 can be so regulated that this process of ignited coal falling into these pockets and sufficient coal over top of gratebar 9 may be continuous,burning much more iine coal 'per square foot of grate area with less chimney-draft than has heretofore been accomplished.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a fuel-burning grate, the combination of a plurality of grate-sections, each of said sections comprising a plurality of right-angled grate-bars, said grate-bars forming steps with air-passages between, providing fuelpockets between the fronts of said steps and the highest bar of the next section, said airpassages leading into said fuel-pockets.

2. In a fuel-burning grate, the combination luv of a plurality of grate-sections, each of said links secured together by a series of axles,

sections comprising a plurality of angled Wheels for supporting said axles, a plurality grate-bars spaced from one another forming of grate sections carried by said endless air-passages, said sections forming f uel-pockchain, each of said sections comprising a'pluets into which the air-passages lead. rality of angled grate-bars spaced from one zo 3. In a fuel-burning grate the combination another forming air passages, the sections of an endless chain of links, a plurality of forming fuel-pockets into which said air-pasgrate-sections carried thereby, each of said sages lead. l

sections comprising a plurality of angled Signed at New York, in the county of New 1o grate-bars spaced from one another forming York and State of New York, this 6th day of 2 5 air-passages, said sections being so arranged May, A. D. 1903.

as to form fuel-pockets into which said air- ELLIS F. EDGAR. passages lead. Witnesses: 4

4. In a fuel-burning grate the combination W. G. FRANZ,

I5 of an endless chain comprising a series of C. B. GLICK.

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