US 1664885 A
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Description (OCR text may contain errors)
April 3, 1928.
Filed March 12. 1927 Patented Apr. 3, 1928.
UNITED STATES WALTER E. HUENEFELD, OF CINCINNATI, OHIO.
Application filed March 12, 1927. Serial No. 174,770.
This invention relates to improvements in lapsing force when two pipe sections are fitted together. 7
A further object is to so construct a stovepipe joint that spreading will be efiectually prevented and so that means shall be provided at one end of the pipe section to prevent collapsing or inward displacement of the edges of the pipe relatively to each other, the construction being such that the seam may be closed by hammering without danger of the opening of a portion of the seam while another portion is being hammered.
A further object is to so construct a stove pipe seam that the same may be formed at a minimum cost and so that the same may be readily assembled and secured.
With these and other objects in view, the invention consists in certain novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claims.
In the accompanying drawings Figure l is a view of a Stovepipe section showing an embodiment of my invention,
Figure 2 is a View showing the parts which form the joint, separated, and
Figures 3 and 4 are sectlonal views.
The pipe section 1 is made 0t sheet metal bent into substantially cylindrical form as is customary and well known.
One'edge portion of the pipe section 1s bent outwardly and backwardly forming a flange 2, then forwardly as at 3, and then inwardly to form a flange 4, whereby a double fold 56 with a hook-shaped edge is formed and separated by a slot or throat 7 between the inner edges of the flanges 2 and 4. The opposite edge portion is bent out wardly backwardly to provide a flange or hook 8 which extends throughout the major portion of the pipe section.
Near one end of the pipe section (prefer ably the upper or crimped end which is Intended to enter the lower end of another pipe section) the edge of the sheet on which the flange or hook 8 is formed, is cut at 9, and above such cut, the metal of thesheet forms a tongue 10. I
In joining the edges of the pipe section, the hook or'flange 8 on one edge portion is caused to engage the hook flange 4 on the other edge portion of the pipe and made to enter the space formed by the fold 6. The pipe is then so manipulated that the flange 8 will slide relatively to the flange 4, and the tongue 10 will be passed through the slot or throat-7 and slid into the space formed by the fold 5, the free edge of said tongue finding an abutment at-the bend of the fold 5 approximately at the juncture of the latter with the part 3, and a slightly shouldered portion 11 of the tongue will pass through the slot or throat 7 A lock is thus formed at one end of the pipe section, and the joint may be closed by hammering without danger of accidental separation of one portion of the joint or seam while another portion is being hammered.
When the parts of the joint or seam shall section, and that the interlocking tongue will 1 be concealed, giving the seam a neat and continuous appearance.
Having fully described my invention what I claim as new and desire to secure by Letters-Patent, is
1. A .pipe section having at one edge a flange extending outwardly, then parallel to the sheet and then inwardly forming a double fold with a hook shaped edge ex tending from end to end of the section, an outwardly projecting hook flange extending approximately from end to end of the-opposite edge of the pipe section and engageable with said hook shaped edge, and a tongue projeetingfrom one end portion of the edge having said hook flange and adapted to abut against the double fold por- 5 tion.
2. A pipe section provided vat one edge portion with an outwardly projecting flange, a. member projectin from said flange, and a hook flange at the ree end of said member, 7
the other edge portion of the pipe section 10 having a hook flange to engage said firstmentioned hook flange and also having a tongue entering under the member on the first-mentioned outwardly projecting flange.
In testimony whereof, I have signed this 15 specification.
WALTER E. HUENEFELD.