US188625A - Improvement in boiler-tube plugs - Google Patents

Description

T. E. HAND.

BOILER TUBE PLUG. No. 188,525. Patented March 20,187?.

Wii/286565.

- UNITED STATES PATENT OFFICE THoMAs B.. HAND, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN BOILER-TUBE PLUGS.

Speoification forming part of Letters Patent No. 1884325, dated March 20, 1877; application filed February 22, 1877 Toall whom it may concern Be it known that I, THOMAS R. HA.ND, of the city and county of Philadelphia, and State of Pennsylvania, have ;invented a new and useful Improvement in Boiler-Tube Pluggers, which invention is fully set forth in the following specification, reference being had to the accornpanying drawings, in which- Figure l represents' a side view of my improvement appliedto a boiler-tube, and illustrating the method of securing the plug in the tube. Fig. 2 is a like -view the'eof, illustrating the manner of removing the plug. Fig. 3 is a longitudinal section ot' a portion of the wrench.

Similar letters indicate correspondin g parts.

My invention consists, mainly, in a tool or wrench which is designed to be used in conjunction with that class of plugs consisting of an elastic disk, which is arranged between a head and a Washer, and compressed and expanded in the boiler-tube by means of a screwbolt, in such a way that a tight joint is made between the elastic disk and the tool. My said tool or wrench iscomposed of a polygonal socket, which fits the nut on the screw: bolt of the plug above named, and of a tubular stem having an internal screw-thread,which fits the shank of the screw-bolt the polygonal socket being so arranged that it-can be attached to the tubular screwrstem anddetached therefrom-at will,and the whole beingcombined with a suitable handle, so that when the plug is driven into the boiler-tube, and the polygonal socket is made to catch over the nut on the screw-bolt, the bolt can be tighteed by its means, and thereby theelastic disk of the plug is compressed and expanded, while, when the socket is detached and the tubular stem is screwed on the sha-uk of the bolt, the plug can be readily drawn out of the tube. It consists, also, in combining, with the tubular screw-ste'n of the wrench, a flange equal to the diameter of the boiler-tube in Which'the ;plug is inserted, or near-ly so, for the purpose of guiding the wrench in the tube. lt consists, further, in combi'ning a scraper with the head of the plug, bythe action of which scraper.

the boiler-tube is cleared of ashes and other substances when the plug is inserted in the tube.

In the drawing, the letter A designates an elastic disk, which is arranged between a head, B, and a Washer, G, and through which, as

well as the head B and washer G, passes a screw-bolt, D, on one end of which is fitted a nut, E. The elastic disk A, head B, and Washer Care of such diameter as will permit of their being readily introduced i a boilertube, as shown, and when the same have been introduced in the tube, and the uut E is turned so as to tighten the bolt D, the elastic disk A is compressed and expanded, and is made to tightly hug the inner surface of the tube. The said elastic disk A and its concomitant parts thus form a very efi'ective plug for the tube.

For the purpose of tightening the screwbolt D, as well as for withdrawing the plug from the tube, I make use of awrench consisting of a socket, F, a tubular stem, G, and a handle, H. The socket F is made of square or polygonal shape, and of such size that it fits over the nut E on the screw-bolt D, while the tubular stem G is provided with an internal screw-thread corresponding to the thread on the screw-bolt D, and made of a corresponding interior diameter to the diameter of the screw-bolt, so that the sten can be sc'ewed on the end of the bolt.

[u order that the socket F may be attached to the tubular stem Gr and detached therefrom at pleasure, I provide said socket with a screw-shank, I, which is fitted in the tubular stem Gr, and inserted therein when it is desired to attach the socket to the said stem, and vice versa, a pn, J, being passed through the sten and the screw-shank I, tor the purpose of holding the socket in place, and to cause it to turn with the screw-shank.

If, after the socket F is attached to the tubular stem Gr, it is made to catch over the nut E, (the plug having been previously inserted in the boiler-tube,) as seen in Fig. 2, and the socket is turned in the proper direction by turning the handle H, the screw-bolt D is tightened and the elastic disk A is expanded in the tube. On the other hand, when the socket E is detached from the tubular stem Gr, and the latter is screwed on the end of the screw-bolt D, as seen in Fig. 2, the entire plug can be drawn out of the tube by pulling on the handle H.

On a suitable part of the tubular stem G is formed a flange, K, of equal diameter to the interior of the boiler-tube in which the plug is inserted, or nearly so, as shown. By this flange K the wreuch is guided when it is introduced in the tube, and hence no trouble is had in eentering the socket F.

The head B is made with a projection, L, which has au angular edge, and is made hollow, so that the head of the bolt D can pass through it. This projection L forms a scraper, and by its action the boiler-tube in which the plug is inserted is cleaned of ashes and other substances that may be found ther-ein, and thus an unobstructed passage is made for the plug.

What I claim as new, and desire to secure by Letters Patent, is-

1. A tool or wrench for plugging boilertubes, eomposed of a detachable soeket, F, of

poiygonal shape, of a tubular stem, G, having an internal screw-thread, and of a handle, H, in combination, and adapted to operate in coj uuctiou with a plug of the character hereinbefore described.

2. The combiuatiou of a guide-flange, K, with the tubuiar screw-stem G of the pluggining tool or wrench, substantially as described.

3. The combination of a seraper, L, with the head B of the plug, substantially as described.

In testimony that I claim the foregoing I have hereunto set my hand and seal this 19th day of February, 1877.

THOS. R. HAND. [L.s.] witnesses:

W. HAUFF, E. F. KASTENHUBEE.

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