US537845A - Flue-scraper - Google Patents

Description

J. R. NOONAN.

PLUB SGRAPBR.

Palnted Apr. 23,#1895.

W/TNESSES:

. JAMES R. NOONAN,

or DAYTON, OHIO.

FLUE-SCRAPER.

SPECIFICATION forming part of Letters Patent N o. 537,845, dated April 23, 1895i.

Application tiled February 4, l 8 95.

To all whom t may concern.-

Be it known that I, JAMES R. N OONAN, of Dayton, county of Montgomery, State of Ohio, have invented a new and useful Improvement in Flue-Scrapers; and I do declare the fol-- lowing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

This invention relates to new and useful improvements in flue scrapers.

The object of the invention is to provide a iiue scraper that will materially lessen the amount of manual labor necessary in cleaning the flues of boilers.

To this end my invention consists of acon? Lstruction that will be fully described in the following specification, and specifically set out in the claims.

In the accompanying drawings which form a part of the application, Figure l, designates alongitudinal elevation of my improved flue scraper. Thisview, as indicated by the arrow, shows the scraper being driven into a iiue, the latter appearing in dotted lines. Fig. 2 is a view similar to Fig. l. This view, as indicatedby the arrow, shows the scraper being drawn out of a flue, the latter appearing in dotted lines. Fig. 3 is a top view of the scraper; Fig. 4, a reduced View showing one of the blades, looking in the direction of the horizontal arrow in either Figsl or 2; Fig. 5, a section on the line -.r Fig. 2.

Referring in detail to the drawings, (A) and (B) designate curved blades, preferably constructed of hard steel. These blades are cut away or reduced as shown at (b), and have their lower or reduced ends curved as at (c) to inclose the sleeve (C), to which they are rigidly attached by means of an'internally screw-threaded collar (D), or in any suitable manner. When so constructed and attached to the sleeve (0),' they are adapted to expand and contract to perform their functions, by means presently described. The semi-circular edges (a) of the blades (A) and (B) are preferably provided with an edgeadapted to Serial No. 537,218. (No model.)

readily cut and remove from the flue any scales or deposits.

(e) and (c) designate angular guide rods partly appearing in dotted lines in Figs. l and 2. These rods are riveted or otherwise rig- 4idly attached to the center of the blades (A) and (B) on an angle to said blades substantially as is shown in the drawings.

(G) designates a rod, of any suitable length, which is loosely inclosed by the sleeve (C).

(f) is a cross head rigidly mounted on the upper end of said rod. This cross head is provided with eyes in its respective ends (f)-(f) that loosely inclose said guide rods.

As the rod (G) is moved in and out, the cross head is likewise moved along the guide rods (e) and (ef). -The effect of this movement is to spread the blades, as shown in Fig. l, until they come in contact with the surface of the iiue; or to contract said blades, as shown in Fig. 2, and thereby permit their easy removal from the iiue. of inserting said scraper in the flue, or of withdrawing it therefrom, expands and contracts the blades, so that no eXtra adjustment or manipulation of the device preparatory to placing it in or withdrawing it from the iiue is necessary. The sliding movement of the rod (G) is regulated or limited by collars (c') and (if), which are secured by set screws (0) (0').

(g) and (g) designate semi-circular plates which are rigidly attached by means of rivets (g), to the mouth of the blades, so as to overlap each other as shown at (h). The distance of these plates from the front ends of the blades is shown in Figs. 1 and 2. By means of these plates the scales and matter scraped from the flue are prevented from entering the mouth of the scraper, and whatever of said matter is scraped from the upper part of the iiue, falls to the bottom through the opening in the blades formed by the cut away portions. The scraper therefore, is in no danger of becoming clogged up by the scales accumulating between the blades, as they are scraped oif.

From the circular form shown in Fig. 3, it will be seen that the entire circumference of the iue will come in contactwith the blades,

In other words, the actA IOO and that the pushing in of the scraper will maintain said blades in contact with the flue. No twisting or screwing is called for in operating the device. One hand grasps the sleeve (C) and holds it, while the other hand manipulates the rod (G).

Having fully described my invention, I claiml. In a lue scraper, the combination of the curved scraper blades, cutaway as described; semi-circular plates inclosing the outer ends of said blades; guide rods rigidly attached. to the inner sides of said blades; a sleeve towhich said blades are attached; a sliding rod inclosed by said sleeve; and a cross head mounted on said rod inclosing said guide rods, substantially as described.

2. In a flue scraper, the combination with a sleeve, and a sliding rod inclosed by said sleeve; of curved scraper blades, cut away as described,and rigidly attached to said sleeve; angular guide rods attached to the inner sides of said blades; a cross head on the outer end of said rod inclosing the angular guide rods, and means on said sliding rod-for limiting the movement thereof, substantially as described.

3. In a flue scraper, the combination with curved metallic scraper blades, and a sleeve.

to which said blades are rigidly attached; of angular guide rods (e) and (e) attached to said blades on an angle thereto substantially as described; a cross head (f) slidingly mounted on said guide rods; a rod (G) in closed by said sleeve, and to which said cross head is rigidly attached, whereby means -are provided for expanding and contracting said blades; and means on said rod for limiting the movement thereof, substantially as described.

In testimony whereof I have hereunto set 4o my hand this 15th day of December, 1894.

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