US595159A - Means for burnishing or polishing interiors of pipes or tubes - Google Patents

Description

(No Model.)

W. D. PORSYTH. MEANS FOR BURNISHING 0R POLISHING INTERIORS OF PIPES OR TUBES, &c.

No. 595,159. Patented Dec. 7, 1897.

M )ezhdvenror.

W itnesses Attorney.

UNrrnn STATES PATENT OFFICE.

IVILBER D. FORSYTH, OF PITTSBURG, PENNSYLVANIA.

MEANS FOR BURNISHING 0R POLISHING INTERIORS OF PIPES OR TUBES, dc.

SPECIFICATION forming part of Letters Patent No. 595,159, dated December 7, 1897.

Application filed March 6, 1897. Serial No 626,243. (No model.)

To all who-1n it may concern:

Be it known that I, WILBER D. FORSYTH, a citizen of the United States, and aresident of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Means for Bu rnishin g or Polishing the Interiors of Pipes, Tubes, 820.; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to whichit appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

Figure 1 of the drawings is a representation of a side elevation of polishing-head. Fig. 2 is a face view of one of disks with its arms and toothed disks or wheels. Fig. 3 is a similar view with arms 0 and toothed wheels re moved. Fig. 4 is a side view of same. Fig. 5 is a perspective view of one of arms C. Fig. 6 is a section on line 00 00, Fig. 2.

This invention has relation to means for re moving from the interior of pipes and tubes, and especially of boiler-tubes, the die-marks, mill-scale, and other roughness or unevenness left therein incident to their manufacture and for polishing or burnishing the same. Experience has shown that any roughness and inequality on the inner surface of boiler tubes not only impedes the water circulation therethrough to a greater or less degree, but that it constitutes a nucleus for the formation and collection of scale. To provide means of practical and efficient character for removing all such roughness and inequality and bringing the inner walls of water-tubes to a high degree of smoothness and polish, whereby not only is the circulation improved and the tendency to formation and collection of scale largely decreased, but the life of the tubes is materially prolonged, is more particularly the object of this invention.

With this object in view the invention consists in the novel construction and combination of parts, all as hereinafter described, and pointed out in the appended claims.

Referring to the accompanying drawings, the letter A designates a polishing or burnishing head, which is built up of a series of adjacent circular plates or disks keyed or otherwise fixed on a central shaft 13. Iivoted to each of said plates or disks to swing in a plane parallel therewith are a number (in the present instance three) of arms 0. To the free end portion of each arm is journaled a toothed or serrated burnishing wheel or disk D.

In the preferred construction, as shown in the drawings, the axes O of said wheels are placed obliquely with respect to the shaft, and the planes of theiriuclination are oblique with respect to all planes which can be taken lengthwise through the axis of said shaft. It will be seen, therefore, that the teeth of the said wheels are caused to be brought to their work at a peculiar angle, which I have found to be very desirable for the reason that they cross the tool-marks left in the pipes or tubes at such an angle and in such a manner as to render their action most effective. It will also be noted that as a result of this arrangement, together with the manner in which the arms are pivoted-. e. to swing outwardly at right angles to the shaft-the effect is as the arms swing outward to make the angle of contact less acute-that is to say,when the teeth of any wheel first come in contact with an obstruction on the wall of the pipe or tube the angle of their contact is more acute than it is after the obstruction has been partly removed and the arms thereby permitted to swing outward to a greater degree. By reason of this feature it will be readily seen that the teeth are prevented from cornering in or cutting lines or marks on the inner surface of the tube. It should also be observed that no two of the axes O of the set of wheels carried by any one plate or disk are parallel with each other and that no two of such wheels have the same or parallel planes of inclination. The wheels are formed with comparatively broad peripheries, and the teeth instead of having sharp cutting edges are preferably of smooth or non sharpened character. These teeth are also longitudinally curved or convexed, as shown, whereby they are adapted to the curved surfaces of the work. In a convenient construction and that which I have usually employed the end portions of the arms 0 are slotted obliquely, as shown at c, and the said burnishing-wheels are journaled on oblique pins 0, extending across said slots. The arms are usually pivoted on studs C which project from the faces of the disks or plates. To limit the play of said arms on theirpivots, each is provided with a stud or disks or plates, I desire it understood that such head may consist of but one disk or plate or of any suitable number. I have, however, found that a tool having about eight of the disks or plates is very satisfactory in its operation. I would also state that'I do not wish to limit myself to a head constructed of plates or disks, as any suitable carrier for the arms 0 and their burnishing-wheels may be employed.

The operation is as follows: The shaft B with the head A is introduced into the pipe or tube to be operated upon and is forced through the same, being meanwhile rotated at a high rate of speed by any suitable driving mechanism, which forms no part of the present invention. Under centrifugal action the arms 0 are thrown away from the center of the head, bringing the wheels into yielding rolling contact with the surface of the tube. Said wheels being set at an angle, as before described, cross the lines left in the tubes by the dies and burnish or polish off all inequalities presented to their action.

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

1. In a machine or implement forpolishing or burnishin g the interiors of pipes and tubes, a head or carrier, arms pivot-ed thereto to swing in planes at right angles to the axis of said head or carrier and carrying each a pin or stud which is inclined with respect to said axis and Whose plane of inclination is oblique with respect to any plane which can be taken longitudinally through the said axis, and polishing or burnishing wheels loosely journaled to said pins or studs,substantially as specified.

2. In a machine or implement for polishing or burnishing the interiors of pipes and tubes, a head or carrier, adapted to be moved through the pipe or tube to be operated upon and having a plurality of arms pivoted thereto, said arms being arranged in sets, and polishing or burnishing wheels journaled to the free end portions of the said arms in inclined planes, no two arms of any one set having their wheels in the same plane or in parallel planes of inclination, substantially as speci- 3. In a machine or implement for polishing or burnishing the interiors of pipes and tubes, a plate or disk adapted to be moved through the pipe or tube to be operated upon, movable sections or arms loosely connected to the said plate or disk, and polishing or burnishing wheels journaled to the free end portions of said arms in inclined planes and having broad non-sharpened peripheral teeth, no two of said arms having their wheels in the same plane or in parallel planes of inclination, substantially as specified.

4. In a machine or implement for polishing or burnishin g the interiors of pipes or tubes, a disk or plate adapted to be moved through the pipe or tube to be operated upon, a number of arms pivoted to the said disk or plate, and polishing or burnishing wheels journaled to the free portions of the said arms and having each peripheral teeth of broad non-sharpened form and longitudinally convexed, no two of said arms having their wheels in the same plane or in parallel planes of inclination, substantially as specified.

5. A device for polishing or burnishing the interiors of pipes and tubes, comprising a shaft, a head carried thereby, a number of arms pivoted to the said head to swing outward therefrom in planes at right angles to the said shaft and carrying each a pin or journal which is inclined with respect to said shaft and whose plane of inclination is oblique with respect to all planes which can be taken longitudinally through the axis of said shaft, and burnishing or polishing wheels loosely mounted on the said pins or journals and formed with peripheral teeth having longitudinally curved or convex working edges, substantially as specified.

6. In a tool or implement for the purpose described, the combination with a head or carrier, of an arm pivoted thereto and having a slot extending into its free end portion in an oblique direction, a pin extending obliquely across the said slot, and a polishing or burnishing wheel mounted loosely on said pin, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

W. D. FORSY'IH.

WVitnesses:

A. O. ROWAND, Jr., H. H. RoWAND.

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