AN IMPROVEMENT IN HOSE-COUPLINGS
Year: 1879

page_text: LETTERS PATENT to Eugen Schultz, of Berlin, W., 16, Französische Strasse, in
the Kingdom of Prussia and Empire of Germany, Engineer and Patent Anwalt,
for the Invention of "AN IMPROVEMENT IN HOSE-COUPLINGS." A communi-
cation by Johann Leonhard Schmidt, Mechanician and Brassfounder, of
Dortmund, in the Empire of Germany.
Sealed the 14th November 1879, and dated the 19th May 1879.
PROVISIONAL SPECIFICATION left by the said Eugen Schultz at the Office
of the Commissioners of Patents on the 19th May 1879.
EUGEN SCHULTZ, of Berlin, W., 16, Franzosische Strasse, in the Kingdom of
Prussia and Empire of Germany, Engineer and Patent Anwalt. "AN IMPROVEMENT
IN HOSE-COUPLINGS." A communication by Johann Leonhard Schmidt, Mechanician
and Brassfounder, of Dortmund, in the Empire of Germany.
The Invention has for its object to protect the thread and face of screw-couplings
from impurities, and consists in applying, besides the usual coupling-nut, a second
or protecting-nut, having the same thread as the former, and being provided at its
face with projections, which fit into grooves on the face of the coupling-nut. The
two nuts are moved simultaneously, the protecting-nut covering the thread of the
coupling when the two pipes are separated, and receding on the coupling nut being
screwed on for making the joint. The packing may be either metallic, the conical
end of one pipe entering into the correspondingly shaped face of the other pipe, or
it may be formed by means of a packing ring of india rubber or other suitable
material pressed between the pipe ends.

page_text: •
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Eugen Schultz in the Great Seal Patent Office on the 18th November
1879.
EUGEN SCHULTZ, of Berlin, W., 16, Französische Strasse, in the Kingdom of
Prussia and Empire of Germany, Engineer and Patent Anwalt. "IMPROVEMENTS IN
HOSE COUPLINGS." A communication by Johann Leonhard Schmidt, Mechanician
and Brass-founder, of Dortmund, in the Empire of Germany..
The Invention has for its object to protect the thread and face of screw couplings
from impurities, and consists in applying, besides the usual coupling-nut, a second
or protecting nut, having the same thread at the former, and being provided at its
face with projections, which fit into grooves on the face of the coupling-nut. The
two nuts are moved simultaneously, the protecting nut covering the thread of the
coupling when the two pipes are separated, and receding on the coupling-nut being
screwed on for making the joint. The packing may be either metallic, the conical
end of one pipe entering into the correspondingly shaped face of the other pipe, or
it may be formed by means of a packing ring of india-rubber or other suitable
material pressed between the pipe ends. In the accompanying Drawings, Figure I.
is a section of the hose-coupling with india rubber packing f; Figure II. is a section
with metal joint; Figure III., a plan view of the coupling nut c, with the coupling
collar e; Figure IV., a plan view of the guard nut band head screw a. Similar
letters indicate corresponding parts. The guard nut b. has on its face two lugs, a
large one hand a small one, while the coupling nut c has on its face two sockets
and g corresponding with the said lugs. Both nuts have the same thread. In
coupling the head screw a with the packing piece, one brings the coupling nut to
the guard-nut in such a manner that the lugs of the same interlock with the sockets
of the coupling nut; the latter is then turned to the right, and the guard nut will
screw back so far as necessary to tighten the packing with the head screw.
screwing off the coupling nut the lugs of the latter cause the guard nut to turn
with it, so that the threads of the guard nut move over the threads of the head
screw, thus protecting the latter and the packing faces, because the head screw is
projecting over the packing face. A collar d is screwed on behind the coupling
nut c, which nut turns between the collars e aud d. What I claim as new and
desire to secure by Letters Patent is -1. In a hose coupling the combination with
two pipe sections, one provided with a head screw of a coupling nut and a guard
nut, both fitted to said head screw, one nut being provided with one or more
lugs, and the other with sockets adapted to interlock with such lugs, substantially
as described. 2. In a hose coupling, the combination with two pipe sections, one
provided with a head screw and a seated packing of a coupling nut and a guard
nut, both fitted to said head screw, one nut being provided with one or more lugs,
and the other with sockets adapted to receive the lugs, substantially as described.
In witness whereof, I, the said Eugen Schultz, have hereunto set my haud and
seal, this 13th day of November, A.D. 1879.
AYYAN
SATT TIL 2
In