AN IMPROVED COUPLING FOR LEATHER AND FLEXIBLE HOSE
Year: 1882

page_text: LETTERS PATENT to Edward Nunan of San-Francisco California in the United
States of America and of 166 Fleet Street in the City of London for an
Invention of AN IMPROVED COUPLING FOR LEATHER AND FLEXIBLE HOSE
PROVISIONAL SPECIFICATION left by the said Edward Nunan at the
Office of the Commissioners of Patents on the 4th November 1882.
EDWARD NUNAN of San-Francisco, California in the United States of America,
and of 166 Fleet Street in the City of London "AN IMPROVED COUPLING FOR
LEATHER AND FLEXIBLE HOSE
"
This invention relates to an improved coupling for leather and flexible hose the
object being to make the two parts of easy connection with perfect security of
joint and of easy disconnection.
I dispense with the usual male and female screw threads and also with the
"horns" whereby I obviate the use of the spanner to couple up or to uncouple.
According to my invention I form two or other number of notches in the outer
face and edge of one half of a coupling and behind-the notches in the barrel
portion I form recesses slightly undercut for the reception of catch hooks on the
underside of "dogs" so that they act as pivots in the recesses to enable the outer
ends of the dogs to be lifted clear of the flange on the front end of the opposite
half of the coupling when the coupling up or the uncoupling have to be effected.
The outer or top surface of cach dog is slightly bevilled or inclined and terminates
in a lip against which a ring can bear when the dog has to be tilted. The top
surface of the dog is also slotted for the reception of a shoulder in the inner
periphery of the ring to engage in when the ring is turned to force the dog into
contact with the back of the flange to lock the coupling.
The ring is of irregular shape and roughened or milled on the outer periphery.
The dogs may be pinned to lugs and instead of the ring being in one piece to be
slid along on the dogs, it may be in two pieces and be provided with a turn button
or projection to enable the dogs to be released and secured.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Edward Nunan in the Great Seal Patent Office on the 4th May
1883.
EDWARD NUNAN of San Francisco California in the United States of America
and of 166 Fleet Street in the city of London "AN IMPROVED COUPLING FOR
LEATHER AND FLEXIBLE HOSE"
This invention relates to an improved coupling for leather and flexible hose the
object being to make the two parts of easy connection with perfect security of joint
and of easy disconnection.
I dispense with the usual male and female screw threads and also with the
"horns" whereby I obviate the use of the spanner to couple up or to uncouple.
My invention is clearly represented at Figures 1 and 2 of the annexed drawings
both of which are half sectional elevations and Figure 3 a plan of a coupling.
Figure 4 is a detached view of one of the dogs.
A-A aro apertures and B B interstices prepared for dogs C C C, the top flange
edge D being preserved entire and without a break to prevent compression or
tightening on the dogs, whilst it affords additional strength to said dogs, confining
their heads whilst being pressed home on the male incline E.
CC, C, are dogs fitting the apertures A, A, A, and the interstices B, B, B.
The dogs C, C, C, are operated by a ring F sliding on the same, said ring F has
"ways" Gas in Figure 5 fitting the dogs to keep it in place while sliding backward
or forwards.
=
-
In operating said ring F it is pressed forward on said dogs CC, C, causing them
to engage the head or incline E of the male portion I of the union. In said ring F
are formed eccentrics J, J, J. K K K as in Figure 5 so that when additional tightening
or locking is required the said ring F is moved circularly; the eccentrics J J J, K K K
thus pressing on the heads M, N of the dogs C, C, C, cause the male portion to press
tighter on the packing R
The double eccentric J J J K K K as shown by the double lines are formed for
the purpose of locking said ring F or preventing it sliding backwards while in use
as an union.
The flange P is a loose ring put in place after the dogs C, C, C, and the slide
ring Fare adjusted and is held there by the hose when made fast on the coupling Q.
The flange P thus holds the sliding ring F and dogs C C C in their place. The
ring P can be soldered or screwed in its place on the female union Q
In Figure 1 I show the coupling as fastened, the ring F having been pushed along
from the position shown at Figure 2 in which the coupling is represented in an
unfastened condition. R is a rubber or leather packing serving also as a cushion
for the flange E to abut against.
Having now described the nature of my said invention and in what manner the
same is to be performed I declare that I claim.
First The particular construction and arrangement of coupling for leather and other
hose as described and illustrated in the annexed drawings.
Secondly I claim The tilt action of loose fitting dogs C, C, C, in couplings I, Qas
set forth in combination with a loose fitting ring F capable of an eccentric
circular movement to lock or to unlock said dogs C, C, C, and also itself as
and for the purposes described.
Thirdly I claim Fitting a ring P to a half coupling Q to secure or hold the
dogs C, C, C, and eccentric ring F in position as described and to facilitate
the removal of said dogs C, C, C, and ring F when required

page_text: Fourthly I claim The operation of dogs C, C, C, on the male incline E through
apertures A, A, A, formed in the side of the coupling Q the top flange edge D
being preserved entire as set forth.
In witness whereof I the said Edward Núnan have hereunto set my hand
and seal this Fourth day of May in the year of our Lord One thousand
eight hundred and eighty three.