Improvements in or relating to Couplings for Hose Pipes and the like.
Year: 1894

page_text: Date of Application, 17th Oct., 1894-Accepted, 1st Dec., 1894
COMPLETE SPECIFICATION.
Improvements in or relating to Couplings for Hose Pipes and
the like.
I, PAUL SCHMAHL, of Biberach a.d. Riss Kingdom of Würtemburg, in the
Empire of Germany, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
Hook couplings for hose-pipes and the like have, among other disadvantages, this
defect, that in case they fall on hard bodies the hooks are extremely apt to bend or
break and further, when dragged over uneven surfaces the coupling easily gives
way or at least begins to leak from becoming loose.
In order to overcome these and other difficulties the hooks are either secured
against external injury by means of projecting rings, or are strengthened by internal
sockets or supports which fulfil the same functions as the rings.
The two half-couplings are made exactly alike, so that the ends of any hose-pipes
may be coupled together, which is a matter of importance in joining up long lengths
of hose.
Fig. 1 shows a coupling with internal stays or sockets a each terminating in a
flat ring 6 which is provided with three equidistant openings or segmental slots and,
on the same side of each of these three openings, a coupling hook h. A rubber
ring d forms an elastic packing inside the rings b. To unite the sockets, they must
be placed together in such manner that the hooks pass respectively through the
corresponding apertures or slots, and by turning them in opposite directions they are
pressed together and the coupling closed; the rubber rings give way, the points of
the hooks slide over one another and when the pressure ceases they are finally
engaged and hold the elastic packing-rings d d firmly together in this position.
In Fig. 2 the ring b, carrying the hooks, is movable and separate from the
socket-piece, in order that when the coupling is made, the rubber rings d may not
rub upon each other or be in any way distorted.
In Fig. 3 the coupling-hooks are arranged inside the hose-socket and protected
against all external shock, in such manner that they are freely exposed to the
flowing water and cannot be frozen together in cold weather. The hooks can
then, as appears from the drawing be screwed on outside the socket with the
hose inside of all, or inside of the socket end, with the hose outside of the latter.
The hooks might also. be made in one piece with the socket-piece, and the metal-
ring for the rubber packing screwed therein.
The S-shape of the gripping surfaces of the hooks, shown in the drawings,
facilitates their sliding engagement; but these surfaces may also be plain or
roughened, or corrugated in any other suitable way.
The shape and node of securing the rubber packing-rings is optional. They
are pressed into their seate or grooved in the sockets, and, for the purpose of
giving them a firmer and closer adhesion, any suitable wire-ring may be sprung in
therewith.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. A coupling for hose pipes and the like having coupling hooks which engage
with one another situated in slotted protecting rings (b) or within the union sockets
as shown in Figure 3 substantially as described and illustrated in the accompanying
drawings.

page_text: 2. The combination and arrangement of parts constituting the complete coupling
substantially as described and illustrated in the accompanying drawings.
Dated this 16th day of October 1894.
W. P. THOMPSON & BOULT,
Agents for the Applicant.