US152736A

US152736A - fletcher

Info

Publication number: US152736A
Authority: US
Publication date: 1874-07-07
Anticipated expiration: 1891-07-07

Description

' A. c. FLETCHER.

Grate-Bars.

No.152,736. Parentedluly 7,1874

FIG. 2.

dir

UNITED STATES PATENT. OEEIcE.

ADDISON O. FLETCHER, OF NEW YORK, N. Y.

IMPROVEMENT IN GRATE-BARS- Specification forming part of Letters Patent No. 152,736, dated July 7, 1874; application filed December 27, 1873.

To all whom it may concern Be it known that I, ADDISON C. FLETCHER, of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Grate-Bars, of which the following is a specification z This invention relates to grate-bars, which are provided with detachable fuel bearings or points 5 and it consists in securing the fuelbearings toV the grate-bars proper by means of a fastening device which is entirely separate or independent from the grate-bar and point, so as to enable the latter to be firmly retained in position, while not preventing the ready attachment or detachment of the point, to replace it with a new one when burned or worn out, the fastening medium being either in the shape of a screw-rivet or screw-bolt, or other device made separate or distinct from the grate-bar or point.

In the accompanying drawings, Figures l and 2 represent views from opposite sides of a grate-bar constructed according to my invention. Fig. 3 is a plan or top view of the same. Fig. 4 is a transverse section through one of the detachable 4fuel bearings or points, showing the use of a screw for securing the latter. Fig. 5 is a correspondingview, representing a rivet-fastenin g device.

The letter A designates the body of a gratebar, which may be formed of a single flat plate, preterablyot' wrought-iron, or it may be constructed of two or more plates riveted together, to give the requisite thickness. The fuel bea-rin gs or points B, which are arranged at the upper edge of the bar, are located at regular intervals apart, and may be cast, or otherwise formed, with a pendent iiange or extension-plate, D, at one side, and with a short ear or lip, E, at the opposite side. A fuel-bearing point so constructed embraces the top edge of the body of the grate-bar, and is secured in position by means of a fastening device, which is made entirelyT separate or independent from either the bar or point, so as to enable the fuel-bearings to be readily applied in position in respect to the bar, and to be quickly detached therefrom when worn and burned out, in Order to be replaced by a new point.

In order to carry out my invention I employ either a set-screw, solid rivet, screw-bolt, tubular rivet, or other suitable independent fastaperture in the flange D bein then dispensed with. In certain instances I propose to employ a tubular rivet, which is inserted through the grate-bar body and ange of the fuel-bearing point, and then clinched or riveted.

The method of fastening detachable fuelbearings to grate-bars, as above-described,

is greatly superior in many respects to the plan heretofore practiced, in which the fastening device forms a part of the fuel-bearing and grate bar, for it will be perceived that a simple rivet or screw can be readily applied, and serves also to secure a more permanent fastening, as it will prevent the fuel-point from moving in any direction whatsoever, forming in fact a fastening which will hold the point in a rigid position, without liability of displacement. The fuel bea-rings or points may be made of cast-iron, and the end ones, as also the central ones, be provided with side projections H, to retain the bars at their proper distances apart, and also to prevent their bciugdis- 'placed by the action of the heat.

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

The combination of a grate-bar with detachable fuel bearings or points, and independent fastening devices F, 'or securing` the fuel-bearings to the grate-bar to permit of their ready attachment and removal, substantially as and for the purpose set forth.

In testimony that` I claim the foregoing, I have hereunto set my hand this 23d day of December, 1873.

ADDISON O. FLETCHER.

llVitnesscs JAMEs L. Nonnrs, A. HILT Nonms.