Improvements in the Construction of Tees or other Forms of Branch Pieces for Making Branch Connections to Water or Gas Pipes.
Year: 1894

page_text: Date of Application, 26th Apr., 1894
Complete Specification Left, 13th Nov., 1894-Accepted, 19th Jan., 1895
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Tees or other Forms of
Branch Pieces for Making Branch Connections to Water or
Gas Pipes.
I DAVID THOMPSON of No. 83 Church Street in the County Borough of
Barrow in Furness in the County of Lancaster Plumber and Glazier do hereby
declare the nature of this invention to be as follows:-
-
My invention is intended to obviate the necessity of cutting a water or gas pipe
for the insertion of a branch connection with its attendant difficulties viz.: the
opening out and baring the pipe sufficiently to allow of the screwing of the cut ends
of the pipe and the insertion of the ordinary screwed T or other form of branch
piece also the cutting of the pipe itself.
My invention consists of a specially constructed T or other form of branch piece.
This branch piece is made in two or more pieces as follows
In a single branch the body of the T is somewhat similar to an ordinary T but
is not screwed except for the connection of the branch pipe & instead of being a
complete cylinder having an internal thread my T is open at the back being some-
what shaped in section having the screwed branch on the rounded side in the
ordinary manner. The open edges of this U shaped body are fitted with tapering
grooves or projections which may be arranged either internally or externally.
This T piece is provided with a loose back piece having grooves or projections
grooves where they engage with the projections on the body piece or projections
where grooves are used with the body piece.
When this loose back is slid upon the body piece of the U shaped T the tapering
projections engage with the tapered grooves and acting as parallel wedges draw the
two halves tightly together and when placed upon the pipe and the loose back is
driven in tight the pipe is firmly gripped and is pressed with great force against the
branch piece of the T.
In using this appliance the pipe to which it is required to affix a branch is first.
bared of earthwork sufficiently to allow of the main pipe being drilled at the point
at which such branch is required. The U shaped T is then slipped over the main
pipe with the screwed branch immediately opposite the drilled hole, a washer of
canvas & white lead (or other suitable jointing material) being first placed within
the T piece and the loose back is then driven in tightly and the main pipe is pressed
up to the branch 'piece making a tight joint.
It is desirable that the loose 'back should conform to the shape of the pipe so that
the pressure may be uniformly distributed.
In applying this invention to a double branch or cross piece a modification of the
plan described would be required. The cross piece would be placed upon the pipe
in 2 halves over the drilled holes and the two parts would be drawn tightly together
by means of tapered projections upon the body pieces and grooved wedges driven
over same.
I prefer that tapered projections & tapered grooves should be dovetailed.

page_text: Improvements in the Construction, of Tees or other Forms of
Branch Pièces for Making Branch Connections to Water or
Gas Pipes.
•
I DAVID THOMPSON of No. 83 Church Street in the County Borough of
Barrow in Furness in the County of Lancaster, Plumber and Glazier, 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 for improvements in the construction of tees or other forms of branch
connections to water or gas pipes to be as follows:-
My invention is intended to obviate the necessity of cutting a water or gas pipe.
for the insertion of a branch connection with its attendant difficulties viz. :-the
opening out and baring the pipe sufficiently to allow of the screwing of the cut ends
of the pipe and the insertion of the ordinary screwed T or other form of branch
piece, also the cutting of the pipe.itself.
"My invention consists of a specially constructed T or other form of branch piece.
This branch piece is made in two or more pieces as follows:-
'
In a single branch the body of the T'is somewhat similar to an ordinary T. but
is. not screwed except for the connection of the branch pipe, and instead of being a
complete cylinder having an internal thread my T open at the back being some-
what U-shaped in section having the screwed branch on the rounded side in the
ordinary manner. The open edges of this U-shaped body are fitted with tapering
grooves or projections which may be arranged either internally or externally.
This T piece is provided with a loose back piece having grooves or projections.
"Grooves where they engage with the projections on body piece or projections where
grooves are used with the body piece.
+
When this loose back is slid upon the body piece of the U-shaped T the tapering
projections engage with the tapered grooves and acting as parallel wedges draw the
two halves tightly together and when placed upon the pipe and the loose back is
driven in tight the pipe is firmly gripped and is pressed with great force against the
branch piece of the T.
"In using this appliance the pipe to which it is required to affix a branch is first
bared of earthwork sufficiently to allow of the main pipe being drilled at the point
at which such branch is required. The U-shaped T is then slipped over the main
pipe with the screwed branch immediately opposite the drilled hole a washer, of
canvas and white lead (or other suitable jointing material) being first placed within
the T piece and the loose back is then driven in tightly and the main pipe is pressed
up to the branch piece making a tight joint.
It is desirable that the loose back should conform to the shape of the pipe so that
the pressure may be uniformly distributed.
In applying this invention to a double branch or cross piece a modification of the
plan described would be required the cross piece would be placed upon the pipe in
two halves over the drilled holes, and the two parts would be drawn tightly together
by means of tapered projections upon the body pieces and grooved wedges driven
over the same. I prefer that tapered projections and tapered grooves should, be
".dovetailed.
...!

page_text: Fig. 2 Sheet 1 shews cross section of tee B with drilled pipe A and loose back
piece C.
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
1st. The use of a tee, or other form of branch connection to water or gas pipes,
having a loose back piece.
2nd. The use of a cross branch connection, to water or gas pipes, in two
halves having tapered projections upon the body and having two grooved
wedges.
Dated this 6th day of November 1804
DAVID THOMPSON.