Improvements relating to Door Closing Appliances.
Year: 1895

page_text: Date of Application, 18th Oct., 1895
Complete Specification Left, 1st July, 1896-Accepted, 22nd Aug., 1806
PROVISIONAL SPECIFICATION.
Improvements relating to Door Closing Appliances.
I, GEORGE MACKIE, of 114 Sand Pits, in the City of Birmingham, Insurance
Manager, do hereby declare the nature of this invention to be as follows:-
This invention consists of improvements rolating to dooi closing appliances,
especially to such appliances as adapted for swing doors opening in either direction,
my object being to construct and ariange simple mechanism in a convenient form
for closing the door quietly or without violent swinging.
In the application of my invention to a folding or swing door, I mount the door
upon suitable pivots for enabling it to be opened either in an inward or outward
direction. The pivot or axis at the lower end of the door has suitable cam like
projections formed upon it for the depression of the door closing spring, and the
tele-copic check tube hereinafter described.
The cam like projections for depiessing the door closing spring engage with
coesponding depressions formed within one side of a sliding block which is fitted
within the box or casing containing the door closing and checking mechanism,
such box or casing being let into the floor in such a manner as to cause no si face
obstruction. The opposite or inner side of the sliding block is suitably formed or
aranged for the reception of one end of the external tube or cylinder of the door
checking apparatus, whilst the extremity of the block on this side forms an
abutment for one end of the spiral or other door closing spring, the abutment for
the other end of the spung being provided by an adjustable collar screwed upon
the end or closing cap of the cylinder. When the door is opened either in an
inward or outward direction, the cam like projections herein before described, force
the block away from the pivot against the resistance offered by the spung. On
the removal of the door opening force or pressure, the spring forces back the
block, and thus closes the door. The resistance of the spring is readily regulated
to suit the door to which the appliance is attached, by means of the screw collar
or adjustable abutment at the end of the cylinder.
The door checking apparatus is formed by an arrangement of telescopic tubes
within the box or casing, oue tube sliding within or upon the other. I preferably
airange for the inner tube to slide with the outer or encasing tube. such
outer tube forming the cylinder, whilst the inner tube serves as
piston.
a tunk like
In the interior of the tubes I arrange a spiral or other spring, which keeps a
constant pressure against the head of the inner tube. On opening the door in
either direction, the inner tube is forced out by the spring, and the lugs or pro-
Jections formed upon or attached to its closed end are thus kept in contact with the
cam like projection on the adjacent side of the pivot. During the outward move-
ment of the inner tube the oil or other liquid in the box or casing flows into the
enlarging interior space between the two tubes, through a suitable valve or inlet,
preferably at the head of the inner tube.
On the removal of the door opening force or pressure the spring on the exterior
of the tubes forces back the door as hereinbefore described, but its action is
retarded by the liquid within the tubes which can only escape through a small
aperture, and as the door cannot be closed until the inner tube is forced back to its
original or normal position, violent closing or swinging with the force of the closing
spring is effectually prevented.

page_text: I vary the extent of opening at the outlet aperture preferably by means of a
screw stud or plug having a conical or tapered end, and thus regulate the flow of
liquid from the interior to the exterior of the tubes, for adjusting the checking
apparatus to effectually control the action of the door closing spring.
I employ a ng or strip of any suitable packing material between the telescopio
tubes, and provide a suitable top or cover plate for closing the box or casing.
I do not limit the application of my invention to any one particular type or
pattern of door closing appliance but adapt my improvements with such modifications
as may be necessary to the varying forms required in practice.
Dated this 17th day of October 1895.
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicant.
0 DUUL стону пррпацвер
I, GEORGE MAOKIL, of 114, Sand Pits, in the City of Birmingham, Insurance
Manager, 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 consists of improvements relating to door closing appliances,
especially to such appliances as adapted for swing doors opening in either ducction,
my object being to construct and ariange simple mechanism in a convenient form
for closing the door quietly or without violent swinging.
In the accompanying sheet of explanatory drawings to be hereinafter
referred to,-
Figure 1 is a sectional elevation of my improved door closing appliance fixed in
position below a swinging door.
Figure 2 is a sectional plan of the appliance when the door is in its closed
position, and Figure 3 a similar view when the door is in its open position
The same reference letters in the different views indicate the same parts
In the application of my invention to a folding or swing door, I mount the
door A upon suitable pivots for enabling it to be opened either in an inward or
outward direction The pivot or axis B at the lower end of the door has suitable
cam like projections formed upon it for the depression of the door closing spring,
and the telescopic check tube hereinafter described.
The cam like projections such as B' B' for depressing the door closing spung C
engage with corresponding depressions foined within one side of a sliding block D
or in the face of the cross sliding piece E interposed between the projections and
the block D. The sliding block D is fitted within the box oi casing
the door closing and checking mechanism, such box or casing being let
auto the floor and having its upper or open end closed with a detachable cover
plate F¹.
containing
The opposite or inner side of the sliding block D has an aperture formed through
it to admit one end of the external tube or cylinder G of the door checking apparatus
whilst the extremity of the block on this side forins an abutment for one end of the
spual or other door closing spiing C, the abutment for the other end of the spring
being provided by an adjustable collar II screwed upon the end or closing cap G
of the cylinder, such cap being formed with the cylinder or brazed or other wisc
secured thereto. When the door is opened either in an inward or outward direction,
the can like projections B B hereinbefore described, force the block D away
from the pivot against the resistance offered by the spring C. On the removal of
the door opening force or pressure, the spring forces back the block, and thus

page_text: closes the door. The resistance of the spring is readily regulated to suit the door
to which the appliance is attached, by means of the screw collar II or adjustable
abutment at the end of the cylinder.
The door checking apparatus is formed by arranging a second tube as J to
telescope within the tube G, preferably in such a manner that whilst the inner
tube Jis caused to slide within the outer o encasing tube G, such outer tube
emains stationary. The inner tube thus serves as a trunk-like piston, the com-
bination of the two tubes forming a telescopic cylinder. To one end of the tube J
I attach the head K having a jaw K' to permit of its passing over the frout bar of
n sliding block D.
In the interior of the tubes 1 arrange a spung L for the purpose of keeping a
constant pressure against the inner tube. On opening the dooi in either direction,
the projections B B from the pivot or axis B are turned from the position shown
at Figure 2 to that shown at Figure 3, and during such movement the inner tube J
is forced out by the spring L, thus keeping the curved ends of the head Kin
contact with the projections B3 B. During the outward movement of the inner
tube J, the oil or other liquid in the box or casing F flows into the enlarging
interior space between the two tubes, through a valve or inlet such as M.
On the removal of the door opening force or pressure the spring C on the
exterior of the tubes forces back the door as hereinbefore described, but its action
18 retarded by the liquid within the tubes which can only escape through a
small aperture N in the cap G, and as the door cannot be closed until the inner
tube is forced back to its original or noimal position, violent closing or swinging
with the force of the closing spring is effectually prevented.
I vary the extent of opening at the outlet aperture preferably by means of a
screw stud or plug such as O having a conical or tapered end, and thus regulate
the flow of liquid from the interior to the exterior of the cylinder, for adjusting
the checking apparatus to effectually control the action of the door closing
spring.
1 employ a ring or strip of any suitable packing material between the telescopic
tubes, and also provide a strip of sheet or other packing to form a tight joint
between the cover plate F and the box or casing F
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim 18.
1. The improved door closing and checking appliance substantially as hereinbefore
described and as illustrated in the accompanying diawings.
2. In door closing and checking appliances the use of a hydraulic telescopic
cylinder formed by inner and outer tubes and provided with an inlet valve and
with an adjustable discharge aperture, substantially as herembefore described and
as illustrated in the accompanying drawings.
3. In door closing and checking appliances the combination of a hydraulic
cylinder consisting of an outer tube G having an adjustable collar H and an inner
tube J having a head such as K, with the outer sping C and an inner spring L
and with the sliding block D, the head K and the block D being caused to move
in opposite directions on the opening or closing movement of the dooi, substantially
as and for the purposes hereinbefore described and as illustrated in the accompanying
drawings.
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicant.