Improvements in Bayonet Fire-hose Couplings.
Year: 1890

page_text: Date of Application, 24th Mar., 1890
Complete Specification Left, 26th Jan., 1891-Accepted, 28th Feb., 1891
PROVISIONAL SPECIFICATION.
Improvements in Bayonet Fire-hose Couplings.
We, COLIN CAMPBELL and JOHN CAMERON, Plumbers aud Brassfounders,
Victoria Works, College Street, Dumbarton, in the County of Dumbarton, do
hereby declare the nature of this invention to be as follows:-
Improvements in bayonet fire hose couplings.
Bayonet fire hose couplings as ordinarily made have a fixed "tail" and nut which
in consequence causes the hose to be twisted when the coupling is being connected.
There is also danger of the pressure of water causing the twisted hose to straighten
with the result of undoing the coupling and in addition the liability of the hose
bursting owing to the obstruction of the passage of the water caused by the twist.
To overcome these serious drawbacks in bayonet fire hose couplings as ordinarily
made we make our improved coupling in three pieces the centre piece being free to
turn round instead of being fixed to either of the tails thus allowing the connection
to be made without twisting the fire hose in the least. In one of the tails we have
a recess in which is placed a solid india rubber ring against which the other tail is
drawn by the nut and so the coupling is made watertight.
Dated this 28th day of April 1890.
COLIN CAMPBELL.
JOHN CAMERON.
COMPLETE SPECIFICATION.
Improvements in Bayonet Fire-hose Couplings.
We, COLIN CAMPBELL and JOHN CAMERON, Plumbers and Brassfounders,
Victoria Works, College Street, Dumbarton, in the County of Dumbarton, do
hereby declare the nature of our invention for IMPROVEMENTS IN BAYONET
FIRE HOSE COUPLINGS and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
Bayonet fire hose couplings as ordinarily made have a fixed "tail" and nut which
in consequence causes the hose to be twisted when the coupling is being connected.
There is also danger of the pressure of water causing the twisted hose to straighten
with the result of undoing the coupling and in addition the liability of the hose
bursting owing to the obstruction of the passage of the water caused by the twist.
To overcome these serious drawbacks in bayonet fire hose couplings as ordinarily
made we make our improved coupling in three pieces the centre piece being free to
turn round instead of being fixed to either of the tails thus allowing the connection
to be made without twisting the fire hose in the least. In one of the tails we have
a recess in which is placed a solid india rubber ring against which the other tail is
drawn by the nut and so the coupling is made watertight.
The annexed drawing shews its construction.
It consists of three parts of which A is a nut B and C tail pieces into a recess in
one of the tail pieces a ring of india rubber or other suitable material is inserted so
as to make the coupling watertight when joined together. The tail pieces B and C
being fixed to the two lengths of hose to be connected are drawn together and
secured by a one quarter turn of the nut A. This turning of the detached nut A
obviates the difficulty experienced with bayonet hose couplings of the ordinary
construction inasmuch as there is no necessity to turn the tail pieces with the
attached hose.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is --
1st. A bayonet hose coupling with detached nut A.
2nd. Two tail pieces one of them having a recess into which is inserted a ring of
india rubber or other suitable material.
3rd. A bayonet hose coupling substantially as and for the purpose herein
described.
Dated this 17th day of January 1801
COLIN CAMPBELL.
JOHN CAMERON.