USRE6353E - Improvement in grate-bars - Google Patents

Description

B. C. BRAVES.

Grate'-Bars.

Reissud March 30,1875.

Fig.1.

WITNESSES= o l/5L THE GRAPHIC GOJMO'l0rLlTMJQL4-1MK Pl-MLILY.

UNITED STATES PATENT OEEIcE.

ROBERT C. GRAVES, OF CAMBRIDGE, OHIO, ASSIGNOR TO WILLIAM H. HOBBS, AND R. C. GRAVES.

IMPROVEMENT IN GRATE-BARS.

Specification forming part of Letters Patent No. 135,799, dated February 11, 1873; reissue No. 6,353, dated March 30, 1875; application filed February 8, 1875.

ing had to the annexed drawing making a part of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawing is a representation of a transverse vertical section of the grate, and Fig. 2 is a longitudinal section through the middle rib of the grate-bar.

This invention has relation to furnacegrates and it consists in the construction and novel arrangement of the triple grate-bars with unequal ribs, and the recessed reciprocating bar for actuating the same, whereby a suificient amount of play is allowed in the agitation of the grate-bars, while the reciprocating actuating-bar is brought up close under the grate, all as hereinafter described.

Referring to the drawing, A a designate the grate-bars,cast in sets of three, which are connected together at their ends by cross-pieces, from which project pivots b, fitting sockets in the front and back bars B B of, the grateframe.

The bars A have their middle parts constructed with depending portions or lugs O, to fit between studs 0, on the upper surface of a transverse bar, 1), which is hinged to the two outer bars of the series A, or may be hinged to all. To this bar is pivoted a lever, E, which extends to the front of the grate, and is fulcrumed on a depending standard, F. The grate-bars are rocked from side to side by properly vibrating the lever E, and are limited in their movement by the inner surfaces of the studs 0, which are beveled, as shown, and which prevent the bars from turning over, and allowing the fuel to fall out.

It will be noticed that the side bars a do not extend down so far as the middle bars A,

and that the reciprocating bar D is cut away or recessed under said side bars, the object being to provide space for the oscillation of the grate-bars.

What I claim as new is- The combination of the bar D, provided with studs 0, with grate-bars or ribs A, and operating lever E, substantially as and for the purposes set forth.

ROBERT C. GRAVES.

Witnesses:

J. K. CHURCHILL, (J. E. SMITH.

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