Improvements in the Manufacture of Hollow or Trough Stretchers and Ribs of Umbrellas and Parasols.
Year: 1899

page_text: Date of Application, 10th Mar., 1899
Complete Specification Left, 31st Oct., 1899-Accepted, 2nd Dec., 1899
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Hollow or Trough Stretchers
and Ribs of Umbrellas and Parasols.
We, WILLIAM ALLEN BINDLEY and WILLIAM JAMES GELL, Managing Directors
of Wright, Bindley and Gell Limited, of Armstrong Works, Chester Street,
Aston Road, Birmingham, in the County of Warwick, Manufacturers, and
JOSEPH FREDERICK BOHAM, of No. 129, Frederick Road, Aston, near Birmingham,
aforesaid, Machinist, do hereby declare the nature of this invention to be as
follows:-
Our invention has reference to the manufacture of the ends of hollow or trough
stretchers, which ends are jointed to the runner notch on the stick and to the
git or middle bit on the rib and also to the joint or top notch ends of hollow
or trough ribs; and our invention consists in making the said joint ends in the
manner hereinafter described. By our invention the manufacture of the joint
ends of stretchers and ribs is facilitated and economized and the joint ends so
made are superior to those manufactured by the ordinary processes.
Our improvements are specially applicable to hollow or trough stretchers of
the kinds technically called "extra wide" stretchers and lock" stretchers and
we will describe our improvements in connection with such stretchers.
In making the runner notch ends of "extra wide" stretchers we dispense with
the separate strengthening bit usually placed in the joint end and conduct the
manufacture of the said joint end in the following manner.
We take a hollow or trough stretcher wire and operate upon its end so as to
make in the middle of the bottom of the trough a hollow rib whereby the trough
is strengthened and increased rigidity given to it at that part, the said hollow
rib replacing the separate bit ordinarily employed. We next operate upon the
ribbed end of the stretcher so as to close and flatten the sides of the trough upon
the middle rib, thereby forming four thicknesses of metal at the end which is
to form the finished joint end of the stretcher. The flattened joint end is next
clipped into the proper shape and afterwards the pin or joint hole pierced in
the Hattened and clipped end of the stretcher. The stretcher is thereby finished
and is ready to be jointed to the runner notch in the ordinary way.
We make that end of the stretcher which is to be jointed to the git or middle
bit on the rib essentially in the manner already described with respect to the
runner notch end.
'
In making the joint ends of lock stretchers according to our invention we
proceed substantially in the manner, described with respect to the joint ends of
extra wide stretchers, that is, we take the hollow "lock" stretcher wire and
form in the end of the trough a hollow rib and at the same time crank the
ribbed end slightly out of the plane of the other part of the wire. The cranked
and ribbed end is next flattened, then clipped, and finally pierced with a joint
hole.
Although we have described our improvements as applied to "extra wide”

page_text: stretchers and "lock" stretchers yet we wish it to be understood that our im-
provements are applicable to the joint ends of all kinds of hollow or trough
stretchers and to the joint or top notch ends of hollow or trough ribs.
Dated this Tenth day of March 1899.
W. T. WHITEMAN,
Agent for the Applicants.
Improvements in the Manufacture of Hollow or Trough Stretchers
and Ribs of Umbrellas and Parasols.
We, WILLIAM ALLEN BINDLEY and WILLIAM JAMES GELL, Managing Directors
of Wright, Bindley and Gell Limited, of Armstrong Works, Chester Street,
Aston Road, Birmingham, in the County of Warwick, Manufacturers, and
JOSEPH FREDERICK BOHAM, of No. 129, Frederick Road, Aston, near Birmingham,
aforesaid, Machinist, do hereby declare the nature of our invention and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement:-
Our invention has reference to the manufacture of the ends of hollow or-trough
stretchers, which ends are jointed to the runner notch on the stick and to the
get or middle bit on the rib and also to the joint or top notch ends of hollow
or trough ribs; and our invention consists in making the said joint ends in the
manner hereinafter described. By our invention the manufacture of the joint
ends of stretchers and ribs is facilitated and economized and the joint ends so
made are superior to those manufactured by the ordinary processes.
Our improvements are specially applicable to hollow or trough stretchers of
the kinds technically called extra wide stretchers and lock stretchers and
**
we will describe our improvements in connection with such stretchers.
In making the runner notch ends of "extra wide" stretchers we dispense with
the separate strengthening bit usually placed in the joint end and conduct the
manufacture of the said joint end in the following manner.
We take a hollow or trough stretcher wire and operate upon its end so as to
make in the midale of the bottom of the trough, a hollow rib or corrugation
whereby the trough is strengthened and increased rigidity given to it at that
part, the said hollow rib or corrugation replacing the separate strengthening
bit ordinarily employed. We next operate upon the ribbed end of the stretcher
so as to close and flatten the sides of the trough upon the middle rib thereby
forming four thicknesses of metal at the end which is to form the finished joint
end of the stretcher. The flattened joint end is next clipped into the proper
shape and afterwards the pin or joint hole pierced in the flattened and clipped
end of the stretclier. The stretcher is thereby finished and is ready to be
jointed to the runner notch in the ordinary way.
We make that end of the stretcher which is to be jointed to the get or middle
bit on the rib essentially in the manner already described with respect to the
runner notch end.
In making the joint ends of lock stretchers according to our invention we
preceed substantially in the manner described with respect to the joint ends of
extra wide stretchers, that is we take the hollow "lock" stretcher wire and
form in the end of the trough a hollow rib or corrugation and at the same time
crank the ribbed end slightly out of the plane of the other part of the wire. The
cranked and ribbed end is next flattened; then clipped, and finally pierced with a
joint hole.

page_text: We will now proceed to describe our invention with reference to the accom-
panying drawing, of which:
Figure 1 represents in plan and cross section an ordinary U or trough shaped
wire employed in the making of extra wide umbrella stretchers; Figure 2
represents in plan and cross section and Figures 3 and 4 in side elevation and
longitudinal section respectively the said wire after the formation of the rib
or corrugation a along that portion of the middle of the bottom of the trough
which is to be formed into the joint end of the stretcher. The end of the
stretcher wire thus operated upon is flattened as is represented in plan in Figure 5,
cross section in Figure 6 and side elevation and longitudinal section respectively
in Figures and S and a four fold or four thickness of metal is thereby obtained
for the joint end of the stretcher; the flattened middle rib thus serving the
purpose of the dispensed with separate strengthening bit which is ordinarily
introduced into the end of the trough wire before the flattening of the same.
The final operations consist in the clipping or shaping of the four fold flattened
end of the stretcher wire as is illustrated in the plan Figure 9 and longitudinal
section Figure 10 and the piercing of the rivet or joint pin hole in the said four
fold flattened end of the stretcher wire illustrated in the pian (partly in vertical
section) Figure 11, side elevation Figure 12 and longitudinal section Figure 13.
Figures 14, 15, 16. 17 and 18 illustrate the application of our invention to the
manufacture of the joint end of a lock stretcher. In this application it will be
seen by reference to the plan and side elevation Figure 15 that the end of the
stretcher wire Figure 14 is cranked simultaneously with the formation of the
long middle rib or corrugation in the said end. The subsequent stages in the
manufacture illustrated in Figures 16, 17 and 18 namely the flattening of the
ribbed joint end the clipping of the same and the formation of the joint hole
differ in no essential respect from the corresponding stages in the manufacture
of an extra wide stretcher hereinbefore described and illustrated.
In the application of our invention to the manufacture of the joint ends of lock
stretchers last described the seven stages ordinarily employed to make the said
joint end are reduced to four, consequently the manufacture is economized and
the separate or loose bit ordinarily employed to strengthen the joint end
rendered unnecessary.
"
Although we have described and represented our invention as applied to the
manufacture of the joint ends of "extra wide" stretchers and lock stretchers
only yet we wish it to be understood that our invention is applicable to the
manufacture of the joint ends of all kinds of hollow or trough stretchers and
to the joint or top notch ends of hollow or trough ribs.
Having now particularly described and ascertained the nature of our invention
and in what manner the same is to be performed we declare that we claim
as our invention of "Improvements in the manufacture of hollow or trough
stretchers and ribs of umbrellas and parasols":
Making the joint ends of hollow or trough stetchers and ribs by first forming
a longitudinal middle rib or corrugation at the bottom of the end of the stretcher
or rib wire, or forming a middle rib or corrugation and simultaneously cranking
the end of the said wire, and by a flattening operation obtaining at the said
end a four, fold or thickness of metal, which partly made thickened joint end
is finished in the ordinary way substantially as herein before described and
illustrated in the accompanying drawing.
Dated the Twenty-seventh day of October 1899.
WILLIAM ALLEN BINDLEY.
WILLIAM JAMES GELL.
JOSEPH FREDERICK BOHAM.