Improvements in the Manufacture of a part of Knot-holding Attachments for the Cords or Lines for Window Blinds, Sashes and the like.
Year: 1897

page_text: Date of Application, 31st July, 1897-Accepted, 11th Sept.,
1897
COMPLETE SPECIFICATION.
Improvements in the Manufacture of a part of Knot-holding
Attachments for the Cords or Lines for Window Blinds, Sashes
and the like.
I, JOHN JESSE JAMES, trading as Dutson and Company of 11 Whittall Street, in
the City of Birmingham, Manufacturer, 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 :-
This invention relates to the manufacture of a certain part of knot-holding
attachments for the cords of window blinds, known in commerce as "knotholders."
Such attachments, as heretofore made, have consisted of a wood screw, terminated
by, and made in one piece with a screwed plug, head or closure adapted to receive
the open mouth of the shell or chamber wherein the knotted end of the blind cord
is inserted, said cord being threaded through an eye or hole in the closed end of the
shell. The plug or closure of the screw-attachment part, besides closing the open
end of the shell, makes a coupling or connection between the other parts of the
fitting.
Now my invention has reference to the manufacture of the screw-attachment
part.
According to my improvements, I make the said screw attachment fitting of two
parts, viz., an ordinary wood screw, and a parallel-sided metal cup, which is secured
to the screw by washers slipped over the shank of the said screw and expanded
within the hollow interior of the said cup, thus uniting the said two parts together.
The outside periphery of the cup is next wormed to fit into the open mouth of the
shell of the knot-holding part.
Figure 1 of the accompanying drawing represents portion of a window blind, provided
with a knot-holder, the screw-attachment of which is made in two principal parts
according to my invention.
Figure 2 represents the said fitting separately and upon an enlarged scale.
Figure 3 is a complete vertical section of Figure 2.
Figures 4 and 5 represent vertical sections of the screw-attachment and shell parts
separated. In the former view (Figure 4), the cup is shown as it is prior to being
exteriorly wormed.
Figures 6 and 7 show the same parts as Figures 4 and 5, but with the screw
attachment in elevation and the knot of the cord introduced into the shell, prior to
the fitting of the same onto the cup of the screw attachment.
Figure 8 shows under and top side plans of the screw-attachment.
Figure 9 is a section of the cup of the screw attachment, which cup is fetched up
from a blank of sheet metal.
Figure 10 shows the hole in the said cup countersunk for receiving the wood-screw
part.
11 is a toncide plan thereof.

page_text: Figure 12 represents the wood screw (shown separately in Figure 13) threaded
through the hole in the bottom of the cup, with its head lying in the countersinking
and with the washers (shown separately, in section and elevation, in Figure 14)
threaded over the roughened shank, prior to the expanding of the same within the
interior of the said cup.
The same letters of reference indicate corresponding parts in Figures 1 to 14.
A is the screw-attachment part of the fitting, and B the knot-holding shell part,
the former comprising a separate wood screw a, with the head end a', fitted with or
having closed upon it, a cup a², which is outside screwed and constitutes a closure
or plug for receiving the mouth or open and inside screwed end 6', of the knot-
holding shell or ferrule B, which has a hole b³, through its closed end, where
through the cord c, passes and within the hollow of which, the knot c¹, is enclosed.
The manufacture of the screw-attachment part is as follows:-I take a round blank
of metal and cup it into the shape shown in Figure 9. Then I pierce the closed end
and subsequently countersink the same at a³, as shown in Figure 10. The headed
wood screw a (Figure 13), which preferably is indented, serrated or otherwise
roughened at the shank end at, is then taken and passed through the hole in the
shell as, from the outer side into the position as represented in Figure 12, and
the hard metal conoidal washers d, are threaded over the shank so as to rest in
the hollow of the cup. By a descending tool, these washers are now flattened out
or expanded, when the same, besides giving an extended bearing for the shank
of the screw, also rigidly connect the screw and cup together and practically as
firmly as though the said parts had been made integral. The outside of the cup
is wormed to suit the inside screwing of the mouth entrance to the knot shell.
In applying the knot holder to a blind, the wood-screw of the screw attachment part
is first driven home into the lath of the blind by an ordinary screw driver, and then
the knot shell part is attachedly connected by screwing it upon the cup or screwed
head of the said attachınent.
Figure 15 represents another form of my invention in which a plate is added to
the cup in order to form a bearing for the screw attachment and give finish to
the article.
Figure 16 represents the same in elevation, but with the added plate f, shown
in section.
As a modification, the screw part may be fixedly connected to the cup part, or
vice versa, without the aid of washers, by forining a ridge of metal as shown at g,
Figure 17, around the counter-sinking a³, and necked hole a², which receives the
head and shank of the wood-screw and then by closing the metal of this neck and
ridge around and into intimate contact with roughened shank and slightly over the
edge of the head of the screw, the two parts are rigidly connected together, but
leaving the nick in the head of the said screw exposed.
As a modification the cup part of the screw attachment may be made solid and
the wood screw part may be secured thereto by upsetting the said cup a² in a die
and thus driving the metal of the same closely around the head and neck of the screw
at a³, and into the indentations of the shank, as shown in Figure 18.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is
First Manufacturing or producing the screw-attachment part of knot-holders
from two secured-together component parts, viz., a screw and a cup or head.
Secondly Manufacturing or producing the screw attachment part of knot-holders
from two component parts, viz., a screw and a cup or head, secured together by
washers threaded upon the preferably roughened or prepared shank of the screw and
expanded within the hollow interior of the said cup, substantially as described and
set forth.

page_text: Thirdly-The improvements in the manufacture of the screw attachment part of
knot-holders, substantially as described and set forth.
JOHN JESSE JAMES,
By Henry Skerrett,
24 Temple Row, Birmingham, Agent for Applicant.
JOHN JESSE JAMES,
By Henry Skerrett,
24 Temple Row, Birmingham, Agent for Applicant.