Improvements in Apparatus for Closing Doors.
Year: 1896

page_text: Date of Application, 1st Apr., 1890-Accepted, 1st Aug., 1896
COMPLETE SPECIFICATION.
Improvements in Apparatus for Closing Doors.
I, JULIUS SCHEIBE, of 3 Cuvrystrasse, Berlin, in the German Empire,
Manufacturer, 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:-
The invention relates to a storm guard arrangement on door closers and is
intended to prevent absolutely the slamming of doors which are exposed to high
winds or strong draughts and where all the closing arrangements hitherto in use
have been inadequate.
The improvement consists in the following, ri. :-Between the lever arm A of
the door closer and the pin bracket S attached to the door to which pin-bracket
the former is usually connected is inserted a cranked link or like appliance in order
to take up or relieve the door closer of any unusually heavy pressure that may be
exerted upon it and which would prevent its acting.
The accompanying drawing represents this invention.
Fig. 1. Front elevation.
Fig. 2. Side elevation.
Fig. 3. Plan.
Fig. 4. Plan of the door closer fixed to the door and the door post with the
cranked link a inserted.
Fig. 5. Plan of bottom of the crank link a.
Fig. 6. Representation of a rubber buffer.
Fig. 7. Plan of another kind of relieving arrangement.
In Figs. 1 to 5 a cranked link a is shown as the selected arrangement for
relieving the door closer this link carries upon its free arm the pin b and is
limited in its movements in consequence of the cut away piece c and the pro-
jections e and on the pin s, (Fig. 5). On opening the door and on the closer
shutting it this cranked link remains inactive (Fig. 2).
On the door being forced to or caused to close by the pressure of the wind the
door closer offers a certain amount of resistance the link a is turned round upon the
pins and the pin b catches (before the door slams) into the tooth of the check
arrangement g Fig. 4.
As soon as the door closer gives way through the air being discharged there-
from the link a returns to its former position and the pin 6 finding no longer any
obstacle the door can be completely shut without any obstruction.
In place of the check catch ga spring or a rubber buffer g' Fig. 6 can be applied
for the pin 6 of the link a to catch against. To further prevent the slamming of
the door a draw bar may also be attached to the free arm of the link a on the
occasion of high winds will be pressed between the door and the frame, and in the
case of double doors between the two wings.
In order that the link a may return more readily back to its normal position &
spiral spring is placed around the pin s with one end fastened to the pin's and the
other to the link a.
Fig. 7 represents a rack and pinion mechanism as another kind of relieving
arrangement.
In this arrangement the lever arm A is connected by a link or connecting piece.
to a pinion or toothed wheel y to which pinion the link is attached. The pinion
gears with a rack or toothed bar = carried horizontally and capable of moving the

page_text: full length of the upper edge of the door. On sudden pressure being exerted
upon the open door the pinion y is rotated and moves the rack z to bring the pin
or projection b into contact with the catch or check arrangement g.
Whilst the
air is escaping from the cylinder of the door closer the pin b is gradually returning
to normal position out of contact with the check arrangement g.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is.―
1. Safety arrangement attached to door closers for relieving them on extra severe
pressure being exerted upon them characterised by the insertion between the lever
arm A and the pins of the door closer of a special relieving arrangement in such
a manner that the door on a severe pressure being exerted upon it is prevented from
slamming by this relieving arrangement and thereby the door closer is prevented
being damaged
2. A relieving arrangement for door-closers such as referred to in Claim 1
characterised by the fitting of a cranked link a between the lever arm A and
the pins of the door closer in such a way that the free arm of the link a will
turn round on the occasion of forcible closing and catch into a check
arrangement attached to the door post or press against a spring which has
been fixed there or against a rubber buffer g₁ and thereby prevent the door
slamming until the door closer gives way through the air being exhausted when
the angle a returns to its original position.
3. A relieving arrangement upon a door-closer such as referred to in Claim one
characterised by the connecting of the lever arm A with the link a of a pinion
or toothed wheel fixed to turn upon a pin in such a way that this pinion on
the door being forcibly closed rotates and thereby pushes a toothed bar i fixed
upon the door forward until the air has escaped from the door closer.
Dated this 31st day of March 1896.
WM. P. THOMPSON & Co.