An Improved Clip or Fastening for Connecting Hose to Metal Pipes.
Year: 1892

page_text: Date of Application, 19th Sept., 1892
Complete Specification Left, 15th June, 1893—Accepted, 15th July, 1893
PROVISIONAL SPECIFICATION.
An Improved Clip or Fastening for Connecting Hose to Metal Pipes.
I, WILLIAM WATSON MACROW, of The Red Lion Inn, Lower Road, Rotherhithe,
in the County of Surrey, Gentleman, do hereby declare the nature of this invention
to be as follows:-
My invention relates to clips or fastenings chiefly designed for connecting india-
rubber tubes or hose to metal pipes or to taps or cocks.
Metallic clips or straps for the purpose above mentioned have heretofore been
made by attaching by rivets or otherwise, to a coiled flat steel spring adapted to
encircle the tube or hose, metal lugs or pieces through which is passed a tightening
screw for the purpose of drawing the steel spring tightly around the tube or hose
and thus clamping the said tube or hose on the metal pipe or on the tap or cock to
which it is to be secured, one end of the steel spring extending beyond or over the
gap between the two lugs, to prevent the squeezing of the india-rubber into the
said gap.
It is found, however, that in the use of hose connected by such clips the sharp
edges of the flat steel spring are liable to force their way into and so cut and injure
the hose.
My improved clip or fastening is free from this serious objection as hereinafter
explained.
In making a clip or fastening according to my invention, instead of using a flat
strip or ribbon of steel with metal lugs attached thereto, I make a clip or strap of
brass or other suitable metal to encircle the tube or hose the interior surface of
which clip or strap is convex in transverse section, that is to say, it is curved or
bevelled so that, when tightened upon the tube or hose its central or rounded
portion will bear against the same, thus obviating the liability to injury of the tube
or hose there being no cutting or sharp edges in contact with the tube or hose.
prefer to form the lugs for the tightening screw integrally with the clip or strap.
They may however be brazed thereto if found more convenient. I make one of
the ends of the clip or strap to extend beyond the lug so as to form a sheath or
filling piece to prevent squeezing of the india-rubber into the gap between the lugs.
In some cases braze the sheath or filling piece to the clip or strap.
I
By my improved formation of the end pieces I obviate another objection viz. :-
the protuberances caused by the rivets usually employed to connect the end
pieces or lugs to the ring or band which protuberances are liable to damage
the tube or hose when the clip is tightly fastened upon it.
For large sized tube or hose I form my improved clip or fastening by moulding
or casting a ring of suitable metal and in such cases form the ring of suitable
shapes in transverse section to bring the middle or rounded portion only in contact
with the tube or hose and to leave the edges above the latter. I also prefer in
some cases to form the ring in two parts connected by a hinge-joint for convenience
in attaching the clip or fastening to a tube or hose.
Dated the 19th day of September 1892.
W. W. MACROW.
D. Young & Co.,
11 & 12, Southampton Buildings, London, W.C.,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
An Improved Clip or Fastening for Connecting Hose to Metal Pipes.
I, WILLIAM WATSON MACROW, of The Red Lion Inn, Lower Road, Rotherhithe,
in the County of Surrey, Licensed Victualler, 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:-
My invention relates to an improved clip or clamp chiefly designed for connecting
india-rubber tubes or hose to metal pipes or to taps or cocks.
The clamps heretofore used for this purpose have usually been made with metal
lugs or pieces attached by rivets or otherwise to a coiled flat steel spring which is
adapted to encircle the hose, and one end of which extends beyond or over the gap
between the two lugs to prevent the squeezing of the india-rubber into the said
gap, a tightening screw being passed through the said lugs or pieces for the purpose
of drawing the steel spring tightly around the hose, and thus clamping the said
hose upon the metal pipe or upon the tap or cock.
It is found, in the use of such hose-clamps, that some difficulty is experienced in
passing the same over the end of the hose. Moreover when the clamp has been
tightened upon the hose, the sharp edges of the flat steel spring are liable to force
their way into and thus cut or otherwise injure the hose.
My improved hose-clamp is free from these objections, as, according to my said
invention, instead of using a flat steel spring with metal lugs attached thereto, I
make my improved hose-clamp with a coiled piece or strap of brass or other suitable
metal, so shaped that it will encircle the tube or hose, but having its interior surface
of convex form in transverse section, that is to say, its interior surface is curved or
bevelled so that the clamp can very readily be passed over the end of the tube or
hose, and, when the clamp is tightened upon the said tube or hose, only its central
or rounded portion will bear against the same, whilst its edges will be prevented
from pressing against the hose, thus obviating the liability of injury to the hose by
the clamp.
In the accompanying drawing
Figure 1 is a side view of one form of my improved hose-clamp,
Figure 2 is a section on the line a, a, Figure 1, and
Figure 3 is a side view showing another form or modification of my improved
hose-clamp.
a is the coiled piece or strap, which is of concavo-convex form in transverse
section as shown, so that, when it is applied to the hose, only the rounded portion a¹
at the middle of the clamp will be pressed into the india-rubber.
Suitable lugs b, b' for the tightening screw c are formed integrally with, or firmly
attached to the said coiled piece or strap a, the lug b¹ being situated a short distance
from one end of the said coiled piece or strap a so that the part a² projecting beyond
the said lug serves as a shield or filling-piece to prevent squeezing of the india-
rubber into the gap that would otherwise exist between the two lugs. I find it
advantageous to form the lug 6 integrally with the strap a, and to attach the lug 6¹
to the said strap by means of one or more rivets, and to pass the tightening screw c
through the lug band screw it into the lug b¹.
In making my clamps for large sized pipes or hose, I prefer to make the coiled
piece or strap a by moulding or casting the same from suitable metal and of such
shape in transverse section that only its middle or rounded portion a¹ will press
against the tube or hose. I can, however, make my improved clamps of wrought
metal if desired.
I prefer, in some cases, to form the coiled piece or strap a in two parts and to
connect these parts by a hinge-joint, as at d in Figure 3, for convenience in attaching
the clamp to a tube or hose.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
:-
First. The improved hose-clamp in which the coiled piece or strap a (with or
without the hinge-joint) is made with its interior surface of convex form in
transverse section, substantially as hereinbefore described, and for the purposes
specified.
Second. The modification of my improved hose-clamp in which the lug bis
formed integrally with the coiled piece or strap a at one end thereof, and the lug b¹
is riveted or otherwise secured to the said strap near the other end thereof,
substantially as, and for the purposes, set forth.
Dated the form day o
W. W. MACROW.
D. Young & Co.,
11 & 12, Southampton Buildings, London, W.C.,
Agents for the Applicant.
W. W. MACROW.
D. Young & Co.,
11 & 12, Southampton Buildings, London, W.C.,
Agents for the Applicant.