A New or Improved Swivel Joint.
Year: 1890

page_text: COMPLETE SPECIFICATION.
A New or Improved Swivel Joint.
I, SAMUEL MIDDLETON of 212 Great Bridge Road West Bromwich in the County
of Stafford Blacksmith do hereby declare the nature of my said 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 has for its object an improved swivel joint which is generally
applicable to any kind of hooks, swivels, ships tackle &c. &c. and which forms a
strong swivel joint cheap in manufacture and simple in construction.
In order that my invention may be clearly understood and more easily carried into
practice I have appended hereunto a double sized sheet of drawings upon which I have
fully illustrated the nature of my said improvement and the mode of manufacturing
the same.
Figure 1 is a sectional elevation of my swivel joint when complete forming part of
a hook.
Figure 2 is a similar sectional elevation shewing the mode of inserting the pro-
jection in the cup.
Figure 3 is an elevation of the joint when complete.
Figure 4 is a sectional elevation shewing a modification in the shape of the pro-
jection and cup.
In carrying my invention into effect I form the circular head or other projection A
upon the one end 61 of the article B to which the joint is required to be added and
turn the face a and shoulder a¹ so as to be a true circle. Upon the other end 6 of
the article B I stamp or otherwise form the open cup D which is made sufficiently
wide at the mouth to receive the circular head A on the other end. To attach the
two together I heat the cup D red hot and insert within it the head A as seen at
Figure 2 with an intermediate sprinkling or layer of powdered chalk, charcoal or its
equivalent after which the cup D is stamped or otherwise pressed around the head A
until the sides d' of the cup D are pressed all round into the neck between the
shoulder a¹ and face a² as seen in Figure 1, the head A being left with freedom to
turn in the cup D by reason of the powder which was contained between the two
parts A & D while being joined. The butting of the straight shoulders d² against the
straight shoulders a³ upon the other end preclude the possibility of any lateral move-
ment in the joint.
In place of having one end formed as a cup & the other with a head I may form a
cup D at both ends as shown in Figure 4 in which case the centre pin E may be of
hardened steel both cups being then pressed around the head of the pin E as described
with regard to the previous example. The heads may be formed of any convenient
shape as long as the shoulders a' and faces a form a neck to receive the sides d' of
the cup and any hook loop ring chain or other attachment may be connected to either
of the ends B as may be suited to any particular requirement.
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:-
A new or improved swivel joint for hooks ships tackle and other articles sub-
stantially as and for the purpose herein set forth and such as shewn by Figures 1, 2
and 3 upon the accompanying drawing.
Dated this 23rd day of Santambor 1890
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicant.