Improvements in Apparatus for Opening and Closing Fan-lights and the like.
Year: 1887

page_text: Date of Application, 21st Dec., 1887
Complete Specification Left, 20th Sept., 1888
Complete Specification Accepted, 26th Oct., 1888
Improvements in Apparatus for Opening and Closing Fan-lights and
the like.
I, HENRY ARTHUR BALL of Nos. 12 and 13 Chiswell Street Finsbury Square
London, Wholesale Ironmonger, do hereby declare the nature of this invention to be
as follows:-
According to this invention I employ for opening and closing fan-lights and the like
a telescopic screw, that is to say, several screws working one within the other. The
inner screw is solid and the outer screw is a tube having a thread on its inside, the
intermediate screws are tubes having threads both inside and outside. Either the
inner or the outer screw has fixed to it a pulley or other mechanism by which it can
be rotated.
For a fan-light opening inwards the outer tube is attached to the frame by a pivot
so constructed that the screw can turn about its axis, and its axis can also turn through
the necessary angle as the light opens. The inner screw is hinged to a bracket fixed
to the light so that its axis can incline as the light opens but the screw cannot turn
about its axis. Upon turning the outer screw it acts as a nut upon the screw inside
it, causing the latter to screw out until it is arrested by a stop, it then commences to
turn, being driven by the outer screw, and acts as a nut upon the next screw, and so
on. By continuing to turn the outer screw therefore, all the screws are protruded and
the light is opened a distance dependent upon the number of screws and upon their
length.
The methods of attachment. may be varied according to the position of the parts to
be separated and brought together.

page_text: COMPLETE SPECIFICATION.
Improvements in Apparatus for Opening and Closing Fan-lights and
the like.
I, HENRY ARTHUR BALL of Nos. 12 and 13 Chiswell Street, Finsbury Square,
London, Wholesale Ironmonger, 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 :-
According to this invention I employ for opening and closing fan-lights and the like
a telescopic screw, that is to say, several screws working one within the other. The
inner screw is solid and the outer screw is a tube having a thread on its inside, the
intermediate screws are tubes having threads both inside and outside. Either the
inner or the outer screw has fixed to it a pulley or other mechanism by which it can be
rotated.
For a fan-light opening inwards the outer tube is attached to the frame by a pivot
so constructed that the screw can turn about its axis, and its axis can also turn through
the necessary angle as the light opens. The inner screw is hinged to a bracket fixed
to the light so that its axis can incline as the light opens but the screw cannot turn
about its axis. Upon turning the outer screw it acts as a nut upon the screw inside
it, causing the latter to screw out until it is arrested by a stop, it then commences to
turn, being driven by the outer screw, and acts as a nut upon the next screw, and so
on. By continuing to turn the outer screw therefore, all the screws are protruded and
the light is opened a distance dependent upon the number of screws and upon their
length.
The methods of attachment may be varied according to the position of the parts to
be separated and brought together.
In order that my said invention may be more fully understood and readily carried
into effect 1 will proceed to describe the drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 shows a side elevation of an apparatus constructed according to my
invention.
Figure 2. is a perspective view of the apparatus fixed to a fan-light opening
inwards.
a, b and c are three screws, b and c being hollow and having a screw thread on the
inside as well as on the outside, the screw a working inside 6 and b inside c.
d is a
tube having a screw thread on the inside to receive the screw c. The end of the screw a
is pivoted to a bracket e, which is fixed to the sash f of the window, the tube d is
pivoted to a plate g fixed to the frame of the window. The tube d carries a pulley d
for receiving a cord by which it can be turned.

page_text: Figure 3 shows a perspective view of another way of applying the same apparatus.
In this case the tube d is pivoted to the end of a bracket fixed to the frame of the
window, the end of the screw a being pivoted to the sash.
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 :-
1. Apparatus for opening and closing fan-lights and the like, consisting of a telescopic
screw substantially as described.
2. The apparatus substantially as described and shown in the drawings.