An Improved Automatically Closing Rising-pivot or Centre Hinge.
Year: 1891

page_text: Date of Application, 26th Aug., 1891-Accepted, 26th Sept., 1891
COMPLETE SPECIFICATION..
[Communicated from abroad by DANIEL HYDE KINGSTON MOGUINESS, of
Daysdale, in the Colony of New South Wales, Storekeeper.]
An Improved Automatically Closing Rising-pivot or Centre Hinge.
I, JOHN LIDDLE, of the firm of Bottomley & Liddle, 154 St. Vincent Street,
Glasgow, in the County of Lanark, North Britain, Patent Agents, 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 what are known as pivot or centre hinges which are
principally employed on gates and doors.
Its object is to provide a pivot or centre hinge of this.description, which whilst
being simple and comparatively inexpensive in construction, will automatically
return the gate, door or the like to its normal or closed position when released.
It consists in a pivot or centre hinge made in two parts, one of which is hollow
and forms a tube or sleeve, whilst the other has a projecting pin adapted to fit into
such tube or sleeve, whose upper surface is inclined or made with a spiral plane,
upon which bears the correspondingly inclined under surface of a shoulder on said
pin, which latter preferably extends downwardly from a socket into which the lower
end of the hinge post or gate heel is fitted or in the case of iron gates it might form
part of the post itself.
The tube or sleeve, into which this pin fits is fixed into a block of wood, or is
prevented from rotating in any other convenient manner, or if preferred the pin
and tube can be reversed, that is, the sleeve can be secured to the hinge post or
gate heel and the pin fixed.
Another modification of this invention consists in providing a flat or horizontal
surface at each end of the inclined surfaces or shoulders on the hinge or pivot pin
and its tube or sleeve, so that there will be no tendency for the gate to close when
fully open, although it will close if first moved slightly in the required direction
so as to bring the inclined surfaces into operation, as will be understood from,
the following description, reference being had to the accompanying drawings,
wherein :-
Figure 1 is an isometrical perspective view of an automatically closing rising
pivot or centre-hinge constructed according to this invention.
Figure 2 is a front elevation of an ordinary field gate fitted with one of said
rising pivots or centre hinges.
Figure 3 is a side elevation of the pin of said rising pivot showing the inclined
shoulder or surface thereon.
Figure 4 is a side elevation of the tube or sleeve formed with a correspondingly
inclined surface and fitted to receive the pivot pin illustrated in Figure 3.
Figure 5 is a similar view to Figure 1, but showing a slight modification of the
rising pivot or centre hinge.
The same letters of reference are used to indicate the same parts in all the
figures.
A represents the tube or sleeve of the improved rising pivot or centre hinge
above referred to, and B the pin working therein, said tube or sleeve being formed
with an inclined surface a, and said pin with a correspondingly inclined shoulder or
surface b as shown.
This said tube or sleeve A is fixed in position within a block of wood, stone or
other material, and is prevented from rotating therein by projecting wings or
feathers C fitting into corresponding recesses in said block as clearly illustrated in
Figure 2. The pin B projects downwardly from a socket D into which the heel or
+

page_text: lower end of the hinge post of the gate or door is fitted, as shown, or in the case of
iron gates or doors said pin 'might form an integral part of said. hinge post, as will
be understood by all persons skilled in the art to which this invention relates.
•
The operation of this invention is as follows
When the gate or door is closed the rising pivot or centre hinge remains in the
position indicated in Figures 1 and 2, that is, with the pivot pin B and its inclined
shoulder bin its lowest position. As the gate is 'opened this inclined surface or
shoulder rides up the correspondingly inclined surface a of the tube or sleeve. A
so that the pivot pin B and therefore the gate or door will be raised until it is fully
open when it will be in its highest position.
If the gate or door is released, the inclined surface or shoulder & on the pivot
pin B will slide down the inclined surface a of the tube or sleeve A, and will
thereby automatically close the door or gate, that is, it will return it into the
position shown in Figure 2.
In the modification of this invention shown in Figure 5 the inclined shoulder.b
on the pivot pin Bi terminates in a flat surface at its lower end, and corre-
apondingly the inclined surface a of the tube or sleeve A is formed with a flat
surface a at its upper end, said flat surfaces being'so constructed and arranged that
when the door or gate is fully open the flat surface bon the pivot pin B will rest
upon the flat surface a' on the tube or sleeve A, and there will therefore be no
tendency for the gate to close.
7.
If, however, the door or gate is moved' a certain distance so as to cause the
inclined surface on the pivot pin to slide on to the inclined surface a on the tube
or sleeve A, the door or gate will be automatically closed; as above described.
The upper end of the hinge post of the gate is passed through an eye E fixed to
the hanging post and so arranged that it allows the gate to rise to the necessary
extent when opened in either direction, and to fall again when it returns to its
normal or closed position.
Although the centre pivot pin B is herein described as being' movable and
projecting downwardly into a fixed tube or sleeve A, said pin can be made a fixture
and can project upwardly into a tube or sleeve secured to and rotating with the
gate, door, or the like.
Having now particularly described and ascertained the nature of my said inven-
tion and in what mauner the same is to be performed, I declare that what I
claim is:-
1st. The herein described automatically closing rising pivot or centre-hinge
made in two parts one of which is hollow and forms a tube or sleeve (such as A)
whilst the other part is provided with a pin (such as B) adapted to fit into said
tube or sleeve whose upper surface is inclined or made with a spiral plane (such
as a) whilst a correspondingly inclined shoulder (such as b) is formed on said, pin,
the whole being constructed and arranged substantially as and for the purposes
specified and as illustrated in the accompanying drawings.
2nd. In an automatically closing rising pivot or centre, hinge the combination
with a tube or sleeve (such as A) formed with an inclined surface (such as a)
terminating in a flat surface (such as a¹) of a pivot pin (such as B) formed with, a
correspondingly inclined surface or shoulder (such as b) and also terminating in a
flat surface (such as 6') the whole being constructed and arranged, substantially as
and for the purposes herein described and explained' and as illustrated in Figure 5.
of the accompanying drawings.
Desadith
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Agents.