Improvements in Self Closing Gates.
Year: 1893

page_text: Date of Application, 21st Jan., 1893
Complete Specification Left, 20th Oct., 1893-Accepted, 25th Nov., 1893
PROVISIONAL SPECIFICATION.
Improvements in Self Closing Gates.
I, JOSEPH GRINDLEY ROWE, of Denbigh House, 32 Walton Street, Aylesbury
in the County of Buckingham, Gentleman, do hereby declare the nature of this
invention to be as follows:-
In order that a gate may be self closing I provide it with a pivot consisting of a
twisted or screw like bar which is made to form part of or is firmly fixed to the
gate. This twisted pivot is received into a bearing of corresponding form and the
parts are so arranged that the twisted bar and the corresponding bearing, by a
screw like action, cause the gate to rise as it opens; when the gate is left free it
closes by gravity. The twisted or screw like pivot may be either at the bottom or
the top of the gate; when it is at the bottom the bearing to receive it may be
either fixed to a post or let into the ground. But where exposure to snow or other
impediment renders the lower part of the gate an unsuitable position for the
twisted pivot it may be at the top, in which case the corresponding bearing is
fixed to the post and at the bottom of the gate there is a plain pivot which it is con-
venient to support by a roller against which the pivot lies; the roller is carried by a
bracket fixed to the post and its periphery is grooved to receive the pivot which is
thus able to move longitudinally with but little friction. The arrangement may be
reversed the twisted bar pivot may be fixed to the post and the bearing or screw
socket to receive it may be upon the upper corner of the gate.
To aid in the closing of the gate a coiled spring may be provided surrounding
the upper pivot. This spring is compressed as the gate opens. The arrangement
may be varied by using plain or untwisted pivots and having the twisted bar say
half way up the gate between the pivots and aligned with them. The twisted bar
in this case works through a screw collar or nut fixed to the gate post; or this
arrangement may be reversed, the nut being fixed to the gate and the twisted bar
to the gate post. I provide the gate with a latch so that when it closes it is
retained or locked.
COMPLETE SPECIFICATION.
Improvements in Self Closing Gates.
I, JOSEPH GRINDLEY ROWE, of Denbigh House, 32 Walton Street, Aylesbury,
in the County of Buckingham, Gentleman, 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 :-
In order that a gate may be self closing I make the pivots, preferably the upper
pivots, as a twisted bar working through a corresponding nut; the one part on the
gate and the other on the post.
I form the nut with fusible metal (such as is used for lining bearings for axles),
the metal in a molten state is poured into the eye of the pivot piece around the
twisted bar or a mandril of like form; but the bar and nut may if preferred be
made of cast or malleable iron.
My invention is also applicable to self closing doors.
In order that my said invention may be fully understood and readily carried into
effect I will proceed to describe the drawings annexed.
Figure 1 is a side elevation of a gate in accordance with my invention.

page_text: Figures 2 and 3 show to a larger scale its twisted or double screw pivot pin,
together with a portion of the stem by which the pivot pin is fixed to the gate
post.
Figures 4 and 5 show the nut like part of the upper pivot with its socket and the
straps which attach the socket to the gate.
Figures 6 and 7 show the plain pivot pin of the lower pivot.
Figures 8 and show the socket part of the lower pivot.
Figure 10 illustrates the application of my invention to a farm gate where the
gate is hung upon the face of one of the posts and closes against the face of the
other post.
Figure 11 shows the application of my invention to a garden gate.
In Figure 1 the twisted pivot pin is marked a, it has a stem at right angles to it
which passes through the gate post and is secured by a nut and washer. On the
stem there is also a front plate or collar which is fixed by screws to the post and
aids in holding the pivot pin securely.
Fixed to the gate there is the strap and socket piece shown by Figures 4 and 5
and in the socket there is the fusible metal nut 6 formed by pouring melted metal
into the socket whilst the socket contains a mandril of like form to the pivot
pin a.
If preferred the fusible metal may be poured into the socket when the gate is in
place, or may be cast on the gate or made partly or entirely of malleable iron.
The lower or plain pivot marked c has no peculiarity, the construction is clearly
shown and it is such as to allow the gate to rise in opening as the nut travels up
the twisted pivot pin. The gate should be so mounted that the nut does not
descend to the bottom of the twisted pivot pin.
The gate is provided with a latch d of suitable construction which retains it when
closed by the operation of the self closing pivot.
In Figure 10 the pivots of the gate are similar to those already described but
they are applied to the gate and post in a different manner.
In Figure 11 the twisted bar forming the pivot pin is upon the gate whilst the
socket with the nut through which the twisted bar passes is upon the wall or
upright against which the gate is fixed. Heavy gates may be partly supported by
a coiled spring.
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:
1. A self closing gate or door substantially as described with a twisted pivot pin
and a nut thereon the one firmly fixed on the gate or door and the other on the
post or upright.
2. A self closing gate or door substantially as described with a twisted pivot pin
having a stem at right angles passing through the post and a nut working upon the
pivot pin fixed by straps to the gate or door.
3. A self closing gate or door substantially as described with a twisted pivot pin
and a nut thereon, the latter being formed by casting fusible metal into a socket
or core box substantially as herein set forth.
DL:. und den of October 1902