Improvements in Pipe Couplings.
Year: 1898

page_text: Date of Application, 19th Mar., 1898-Accepted, 20th May, 1898
Improvements in Pipe Couplings.
A communication from JOHN FRANCIS NORMOYLE, of 500, Wales Avenue, and
HENRY JAMES BAACK, of 849, East 134th Street, both in the City, County
and State of New York, United States of America, Manufacturers.
I, CHARLES AUBREY DAY, of 321, High Holborn, in the County of London,
Chartered Patent Agent, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:
-
The invention relates to improvements in pipe couplings, and consists in the
novel combination of features hereinafter described and particularly pointed out
in the claims. The object of the invention is to produce a perfectly convenient
and secure means for coupling together pieces of pipe and ensuring the formation
of absolutely tight joints capable of preventing the leakage through them of
ammonia or other gas or fluid as well as liquids.
My invention will be understood from the following description taken in con-
nection with the accompanying drawing, which represents a central vertical longi-
tudinal section through oupling embodying my invention.
In the drawing A designates the coupling proper as being in the form of an
elbow, but it is obvious that it may be straight or of T or other shape. The
device A is a sleeve internally threaded at its opposite ends, as at a, a, and having
between its threaded portions the integral inner annular band B, whose bore
corresponds with the bore of the pipes to be connected together and whose ends
constitute the inwardly beveled shoulders b, b, against each of which is placed
the soft metal washer C. The ends of the pieces of pipe D to be connected by
the coupling sleeve A are threaded, as at d, to engage the threads a of said sleeve,
and are beveled, as at e, to correspond and become parallel with the beveled
shoulders 6 of said sleeve.
In securing the parts together the washers C will first be inserted within the
sleeve A and against the beveled shoulders b, and thereupon the pipe D will be
screwed firmly into said sleeve and against said washers C, driving the latter
firmly against the shoulders 6 by the pressure against the washers of the beveled
ends e of said pipe.
The beveled end e of the piece of pipe D furnishes an extended bearing sur-
face for pressing against the washer C, and said beveled end e being parallel with
the beveled shoulders ensures a uniform pressure over the side surfaces of said
washer and the formation of a tight joint.
Between the threads a and the shoulders bare formed annular recesses f which
receive the washers C and co-operate with the said shoulders and the beveled
ends e to form a construction rendering it convenient to secure tight joints.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
1. The coupling sleeve A having the threads a, band B and inwardly beveled
shoulder b, combined with the washer C against said shoulder, and the pipe 1)
having the beveled end e for contact with said washer and corresponding with
the bevel of said shoulder b; substantially as shown and described.
2. The coupling sleeve A having the threads a, band B, inwardly beveled
shoulders b and recesses f, combined with the washers C in said recesses and
against said shoulders, and the pipe D having the beveled end e for contact with
said washer and corresponding with the bevel of said shoulders b; substantially
as shown and described.
35
1
1000
DAY, DAVIES & HUNT,
Chartered Patent Agents, 321, High Holborn, London, W.C.,
Agents for the Applicant.