US179283A - Improvement in grates for furnaces - Google Patents

Description

J. DODGE & T. E. COLES.

GRA-TES FOR FURNACES Patented June 27,. 1876. 12;].

INVE/V 70 R6 MPETERS. PHOTQ-LIYHOGRAPHER, WASHINGTON. D. C.

earns FFIGE.

E ATENT JOHN DODGE AND I THOMAS E. OOLES, OF LONDON, ENGLAND, ASSIONORS TO CHAR-LES MARTIN STOER AND THOMAS EDGHILL OOLES, OF SAME PLACE.

IMPROVEMENT IN GRATES FOR FURNACES.

Specification forming part of Letters Patent No. 179,283, dated June 27, 1876; application filed May 6, 1876.

is an end elevation, and Fig. 4 is a transverse section on the line :20 00, Fig. 1.

Like letters indicate the same parts throughout the drawings.

a is the ordinary flue. b b are cross frames or bearers for the improved furnacebars 0. c is the body or belly of the bar; 0 0 the teeth serrations or projections on both sides and c c the ends, which last are, on their under sides, rounded or curved, and so lie in correspondingly-shaped seats prepared for them in the bearers b as to rock freely therein.

The inclination of the teeth serrations or projections 0 and consequently of the airpassages between them, is specially to be noted, the current being from the front toward the back of the boiler.

A dead-plate may be adapted to receive and support the nearer ends of one nest or set of furnace-bars, instead of one of the bearers b, or the bearer may be adapted to support the plate.

Bearings e are fixed to the under side of two of the bearers b, for supporting a shaft, f, for moving the bars 0, which shaft may be rocked or turned in alternate directions by a hand-lever, or by other suitable means.

9 g are two toothed sector-wheels or pinions on the shaft f. h h are agitators,operated by the pinions g. These agitatops are movable castings or pieces prepared for and resting upon and supported by bracket-rollers; t',

which are themselves fixed to the sides of the side bars, thereby avoiding the necessity for drilling any holes in the flue, which is a matter of great importance, and whichhas heretofore been eifected with other arrangements of rocking fire-bars.

Each agitator has teeth h on its under side engaging with those of its pinion g. It also has nicks or grooves on the upper side, within which lie the lower edges of bellies c of the furnace-bars, which enter these nicks without disturbing the proper bearings of the ends 0 in their seats upon the frames 1).

It will be obvious that a to-and-fro motion given to the agitators will effect the rocking or turning of the bars on their longitudinal axes.

Fig. 4 shows the bars nearly at their extreme angle of turning or tilting in onedirection, and the other working or moving parts of the apparatus with their corresponding position. 4

It is evident that, by their movementin opposite directions alternately, and in consequence of the inclined teeth serrations or projections of the bars lying within or opposite to the spaces between those of the adjacent bars, the said bars will act as pokers and crushers to each other, and will bring down the cindets, which otherwise would become clinkers,

. and which can therefore be collected and returned to the furnace.

All of the furnace-bars are made alike and interchangeable, excepting the outside furnace-bars, which have their ends 0 flat on the under side, and do not rock, tilt, or turn like the others.

The shaft f and pinions 9, arranged either substantially as herein set forth, and for the in the center or at the side of the furnace, purpose specified.

and the agitators h, constructed as herein de- JOHN DODGE.

scribed, and supported in roller-bearings i, THOMAS EDGEULL OOLES. whose brackets are fixed on the side bars, in Witnesses:

combination with furnace-bars whose ends ERNEST ISAAC,

are fitted to rock or turn in suitable bearings, WALTER EDWARD DUNCAN.

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