Improvements in and relating to Swivel Joints for Bay Window Curtain Poles and the like.
Year: 1899

page_text: Date of Application, 29th Sept., 1899
Complete Specification Left, 29th June, 1900 -Accepted, 22nd Sept., 1900
PROVISIONAL SPECIFICATION.
Improvements in and relating to Swivel Joints for Bay Window
Curtain Poles and the like.
GEORGE CHISHOLM, Brassfounder, 630, Coventry Road, Small Heath, Bir-
mingham, I do hereby declare the nature of this invention to be as follows:-
It relates to improvements in bay pole and other swivel joints the nature
and objects being hereinafter defined. In carrying out my invention I form
two half spherical balls out of sheet brass or other suitable material. These
half balls are made so as to fit into each other, thus forming a sphere or ball
when put together. I also form out of sheet brass or other suitable material
two cups. The bottoms of these cups are made concave and they correspond
with and cover the larger surface of the before mentioned ball. The mouths
of these cups have a small recessed shoulder formed upon them into these recesses
wooden plugs or sheet iron washers with screwed central holes are fitted. Into
the inside of the before mentioned half balls I fix a bent iron screwed pin or
rod by means of riveting. The before mentioned concave cups are passed
over the screwed portion of these iron pins, and are pressed upon the ball and
held in position by means of the wooden plugs or screwed iron washers.
Dated this 28th day of Sentember 1899
Improvements in and relating to Swivel Joints for Bay Window
Curtain Poles and the like.
I, GEORGE CHISHOLM, of 630, Coventry Road, Small Heath, Birmingham, in
the County of Warwick, Brassfounder, 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 has for its object improvements in and relating to swivel joints
for bay poles and the like by which such joints are made much stronger than
hithertofore and while working freely on the swivel in a horizontal direction are
vertically rigid and are not affected in their action by any ordinary strain which
they may sustain.
In order that my invention may be clearly understood and more easily carried
into practice I have appended a sheet of drawings upon which I have illustrated
the nature of my said improvements together with the means of carrying the
same into effect."
Figure 1 is a vertical sectional elevation through one of my joints.

page_text: Figure 2 is a plan of same.
Figure 3 is a horizontal section..
Figure 4 is a cross section.
In carrying my invention into effect I form the two half spherical balls B
and B¹ from sheet brass or other suitable material the one half B¹ fitting into
the recess B2 formed in the half B to receive it by which the complete sphere
or ball is formed, the two halves of which are so connected that the one part
is free to turn independently of the other. Within these half balls I insert
the ends A and A¹ of the bent or cranked screw pins E and E¹ the sides of the
half balls being pierced to receive same and the ends A and A¹ are drilled to fit
on the ends of the pivot pin F which are reduced to receive them. The half
balls are also pierced to receive the ends F1 and F2 of the pivot pin F and the
whole is fixed together by riveting. over the extreme ends of the pin F, with
intermediate rounded washers H which are provided to enable the half balls B
and B₁ to have a free rotating action on the pivot. The cups C and C¹ are also
formed of sheet brass or other suitable material and are made concave at the end
to correspond with and cover the larger portion of the aforementioned ball
while the mouths of the cups have the recessed shoulders D and D formed upon
them and into which are fitted wooden plugs or sheet iron washers K and K¹
with screwed central holes for the screw pins E and E¹ to pass through.
It will be seen that by the combination of the sphere with the bent pins which
are connected to the extreme ends of the central axis I provide the greatest
resistance to strain in the one direction which can be obtained within the limits
of the diameter of the pole and at the same time I obtain a joint which works
with perfect freedom and smoothness in the other direction as required.
In place of the screws E E' any form of attachment to the poles may be
substituted.
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
1st. A swivel joint for bay poles and the like characterized by two half spheres
enclosing the cranked ends of two projecting attachment pins all connected
together by a central axis pin substantially as and for the purpose herein set
forth and illustrated.
2nd. A swivel joint for bay poles and the like characterized by two half
spheres enclosing the cranked ends of two projecting screw pins all connected
together by a central axis pin in combination with cups having concave ends
for fitting the sphere and mounted upon the said screw pins substantially as
and for the purpose herein set forth and illustrated.
Dated this 27th day of June 1900
LEWIS WM. GOOLD,
Agent for Applicant, 5, Corporation Street, Birmingham.