Improvements in the Manufacture of Hinges for Automatically Closing Doors and Gates.
Year: 1890

page_text: Application, 13th Nov., 1890-Accepted. 13th Dec.
1000
Application, 13th Nov., 1890-Accepted. 13th Dec
1000
TUATION.
Improvements in the Manufacture of Hinges for Automatically
Closing Doors and Gates.
We ROBERT ASHWORTH of 38 Ogden Street Rochdale in the County of Lancaster
Overlooker and WILLIAM EVANS of 1 Tuer Street Lomax Street Rochdale aforesaid
Engineer 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
5 following statement and accompanying drawings
:-
Our said invention relates to hinges for automatically closing doors and gates and
particularly to hinges having a screw or spiral hinge pin on one half of the hinge
fitting a similarly formed nut on the other half of the hinge. In hinges of this
type the door being mounted say on the hinge halves which carry the nuts the
consequence is that when the door is opened it is at the same time raised to a certain
extent by the ascent of the nuts on the scrow or spiral hinge pins. When the door
is released in an open position its own weight impels it to drop and in dropping the
nuts being compelled to follow the spiral curves of the hinge pins cause the door to
turn on the said hinge pins and thus the door is automatically reclosed.
In manufacturing the said hinges we form them by casting or we cast the screw
or spiral hinge pins an corresponding nuts either separately and from separate
patterns or we may cast the screw or spiral hinge pins and thereafter cast the nuts
on the said pins. We are thus enabled to produce hinges at a low cost.
To render our invention perfectly clear we will now proceed to describe the same
more particularly with reference to the annexed drawing:
The said drawing illustrates our improved hinge in perspective. The half which
carries the screw or spiral hinge pin is marked a and the half which carries the nut
is marked. The hinge half a and the spiral or screw hinge pin al are preferably
cast in one piece although we might if preferred cast the hinge pin a separately and
ivet or otherwise secure it to the hinge half a'. The pin a' is formed with a spiral
groove as clearly shown in the drawing and the said pin enters and fits more or less
ccurately the nut which is cast in a piece with the hinge half b.
In the drawing the hinge pin a' is shown as partly entering the nut b the parts
ccupying such a relative position for example as they might occupy when the door
open. It will he clearly seen that if the hinge half 6 were loaded as for example
y the weight of the door or gate it would tend naturally to slide down the hinge
in a' and in sliding down it would be compelled to turn by the spiral and thus close
e door. If preferred the top of the nut might be closed in so as to prevent
ady access of dirt or dust to the pin. The position of the spiral pins is so adjusted
latively to the hinge halves and the door that when the door is closed the nuts have
t quite reached the feot of the hinge pins and the door when closed is consequently
essed closely in contact with the door frame and also closely down at the foot thus
cluding draughts. A spiral hinge pin and nut having a greater number of grooves
threads than one might be used and instead of having the nut half on the door
described we might mount the hinge pin half on the door. The shape, form and
struction of the hinges might be greatly varied in accordance with the purposes
which they are to be employed.
ge pins and nuts with right and left hand spirals or screws crossing each other so
When applied to swing doors we form the
to act in either direction. Our improved self closing hinges are produced as
inbefore set forth by means of casting. Wo prefer to cast cach hinge half a in
piece with the spiral hinge pin a'. These may be cast separately in any quantities
suitable patterns.
he hinge halves b with nut b' are also cast in a piece and either from separate
distinct patterns or the nuts & might ha

page_text: spiral binge pins a¹ the pins being previously coated with some suitable dressing
such as black lead to ensure easy separation of the hinge pin and nut when taken
from the mould or chill. Instead of casting the spiral hinge pins in a piece with the
hinge half as described and shown we might cast the hinge pins separately and rivet
or otherwise attach them to the hinge halves. The process of casting the said
improved hinges enables us to produce them at a very low cost. The hinges may be
produced from any suitable metal.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what
we claim is :-
The production of spiral or screw hinges of the indicated description for auto-
matically closing doors and gates by casting the said hinges or the component parts
thereof in moulds or chills substantially as hereinbefore described and shown.
Dated this 12th day of November 1900
DUTTON & FULTON,
1, St. James' Square, Manchester, Agents.