Improvements in Bayonet Fire-hose Couplings and Connections.
Year: 1898

page_text: Date of Application, 18th Oct., 1898-Accepted, 7th Jan.,
1899
COMPLETE SPECIFICATION.
Improvements in Bayonet Fire-hose Couplings and Connections.
We, COLIN CAMPBELL and JOHN CAMERON, both of Victoria Works, College
Street, Dumbarton, North Britain, Plumbers, Brassfounders, Gasfitters & Bell-
hangers, 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:-
This invention relates to improvements in bayonet fire-hose couplings and their
connections and has for its object to overcome the disadvantages attendant upon
the use of bayonet fire-hose couplings as ordinarily made that is to say which
have a fixed tail and nut causing the hose to be twisted when the coupling is
being connected. With a hose thus twisted there is danger of the pressure of
water causing the hose to straighten and undo the coupling. Also in addition
to this there is the liability of the hose to burst owing to the obstruction offered
to the passage of water caused by the twist. The blind cap, used in connection
with such hoses, as ordinarily made is also in one piece, causing considerable
friction upon the rubber washer which thus soon gets damaged and requires
replacing.
In order to overcome these serious drawbacks in bayonet hose-couplings and
their connections, we, in accordance with our invention, make the coupling in
three pieces, and the connections in two pieces the centre piece, in the case of
the coupling, being free to turn round instead of being fixed to either of the
tails, thus allowing the connection to be made without twisting the hose in the
least or in any way damaging the rubber washer which is interposed to make
the joint watertight.
But in order that our said invention may be more readily understood and
easily carried into effect we will proceed to describe the same with reference to
the accompanying drawings in which
Fig. 1 is a longitudinal section,
Fig. 2 a similar view
Fig. 3 an end view of one tail piece with revoluble nut, and
Fig. 4 is an end view of the second tail piece which engages with said nut.
Fig. 5 is a section of the blind cap.
Referring to the said drawings A is the nut or central portion which is pro-
vided with a flange a abutting against a similar flange a formed or provided
on the tail piece B of the coupling. The said tail piece C which, like the tail
piece B, is attached to the length of hose to be coupled, is drawn towards the
tail piece B and secured by a quarter turn of the nut A. D is a washer of
rubber or other material interposed between the two abutting faces of the tail
pieces. It will thus be seen that with our improved coupling no twist is given
to the hose.
Fig. 5 shews the method of securing the blind cap to the tail piece C, the
same method being employed for securing the cap to fire cocks or whatever other
fitting required.

page_text: Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is: -
1. A bayonet fire-hose coupling consisting of two tail pieces arranged to be
drawn together by a nut mounted loosely upon one of the said tail pieces, all
constructed and arranged substantially in the manner as and for the purpose
herein before described and shewn in the accompanying drawings.
2. Attaching blind caps to fire-hose couplings, fire cocks and the like by a nut
mounted loosely upon the cap and operating substantially in the manner as and
for the purpose hereinbefore described and shewn in the accompanying drawings.
. Dated this 17th day of October 1898
JOHNSONS,
Applicants' Agents, 115, St. Vincent Street, Glasgow.