IMPROVEMENTS IN DOOR. SPRINGS
Year: 1884

page_text: I, JAMES ADAMS of 216 Great Dover Street in the County of Surrey, Engineer,
do hereby declare the nature of the said Invention for IMPROVEMENTS IN DOOR.
SPRINGS, to be as follows:-
This Invention relates to improvements in door springs which may be applied to
other purposes.
In carrying out my Invention I proceed mainly as follows:-
On the pivot which forms the axis on which the door turns I form one or two.
lugs partly of circular form. These act as levers and act upon bearings formed at
the end of two jaws, claws or levers.
On the other end of these jaws I form another bearing or joint.
Between the two bearings or joints I apply a spring or springs.
The action of the lugs upon the jaws is such that during the opening and closing
of the same the power of the spring or springs is varied so that when a door is
closed a greater force shall be exerted upon the pivot of the door than when it is
open. On turning the pivot either one way or the other one of the jaws is moved
from its set position whilst the other is retained by a pivot or pivots in the lid or
top portion and also bottom portion of the box which contains the jaws, spring or
springs &c.
:
The spring or springs are contained in a cylindrical box. This cylindrical box'
is jointed to one of the jaws and from the other jaw a jointed plate is applied
through which is passed a screw bolt into a nut which holds and compresses the
spring to any tension required.
In the cylindrical box is a seating for the spring or springs.
j

page_text: I, JAMES ADAMS of 216 Great Dover Street in the County of Surrey Engineer
do hereby declare the nature of my invention for IMPROVEMENTS IN DOOR SPRINGS,
and in what manner the samo is to be performed, to be particularly described
and ascertained in and by the following statement :—
This Invention relates to improvements in door springs on spring hinges, which 5
may be applied to other purposes.
In carrying out my Invention I proceed as follows; reference being had to the
Fig 1 Plan of one form of my improved spring hinge.
Fig 2. Sectional plan through jaws and cylindrical box or such form that will
contain the cylindrical spring.
Fig 3 Sectional elevation of box.
Figs 4 to 8 and Fig 10 show by sectional plans the springs and jaws and
cylindrical or other shaped box applied in modified forms on the pivot of the door
as shown in Figs 1 and 3.
Fig 9 shows the action of the spring and jaws shown in Fig 8.
Fig 10 illustrates modification, the spring being applied direct on the jaws.
The same letters indicate like parts in all the figures.
On the pivot a which forms the axis on which the door turns I form one or two
lugs partly of circular form gg. These act as levers and operate on bearings c
formed at the end of the jaws claws or levers d d.
On the end of these jaws d I form another_bearing or bearings or joint or
joints c. Between the two bearings or joints c. c I apply a spring or springs f.
The action of the lugs b and yg upon the jaws d is such that during the opening
and closing of the jaws d the power of the spring or springs f is varied so that
when a door is closed a greater force shall be exerted upon the pivot a of the door
than when it is open.
On turning the pivot a cither one way or the other, one of the jaws & is moved
from its set position as shown in Fig 1. whilst the other is retained by a pivot or
pivots in the lid or top portion and also bottom portion of the box h which
contains the jaws & spring or springs ƒ &c.
The spring or springs fis or are contained in a cylindrical or other form of box i.
This box i is jointed to one of the jaws, and from the other jaw a jointed plate k is
applied through which is passed a screw bolt into a nut m which holds and
compresses the spring or springs f to any tension required.
In the box i is a seating n for the spring or springs f
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
1 claim is
1. The spring or springs f acting between and on the jaws d substantially in
manner herein described and as illustrated by the drawings, or any mere modification
thereof.
2. The action of the claws or jaws d and spring or springs fon the pivot a of
the door substantially as shown in Figs 1, 6, 8 and 10 or any mere modification
thereof

page_text: 3. The general form and action of the spring or springs f for door spring hinges
substantially as shown and described or any mere modification thereof.
4. The principle as applied to vary the power of the spring on the pivot of the
door substantially as hereinbefore described and illustrated by the drawings.
Dated this 20th day of October 1884.