Improvements relating to Door Closing Appliances.
Year: 1897

page_text: Date of Application, 31st July, 1897
Complete Specification Left 7th Apr. 1898-Accepted, 11th June, 1898
PROVISIONAL SPECIFICATION.
Improvements relating to Door Closing Appliances.
We, SAMUEL HILL, of 260, New John Street West, Cabinet Bar Fitter, and
ROWLAND HODGES, of 12, Frederick Street, Brass Founder, both in the City of
Birmingham, do hereby declare the nature of this invention to be as follows:-
This invention consists of improvements relating to door closing appliances,
our object being to construct an effective and convenient combined door closer
and door check, from few and simple parts which can be readily constructed and
fitted together.
In the construction of our improved door closer and check, we employ a brass
or other metal cylinder or barrel and secure the same to a suitable plate for attach-
ment to the door. On the same plate we also mount the door closing spring box
of any ordinary construction having a lever mounted upon one end of its central
pin or axle for connection with the fixed bracket on the door casing. The lever
is also connected by a rod passing along the exterior of the barrel to the outer
end of the piston rod which projects through the end of the barrel remote from the
spring box. The opposite end of the barrel is provided with an air vent, the
amount of opening being adjusted by means of a conically pointed stud.
The piston or plunger has an air passage formed through it which is auto-
matically closed on the in-stroke of the plunger by a valve consisting of a strip
of steel secured at one side to the plunger but having its opposite end free or un-
attached. On the out-stroke of the plunger the valve opens and allows the air
to pass from one side of the plunger to the opposite side and thus prevents
the retarding of the opening movement of the door. On the closing movement of the
door, under the action of the spring, when the valve is automatically closed the
air can only escape through the vent hereinbefore described, and the amount of
the opening is so adjusted as to prevent violent closing of the door.
The face of the valve strip is fitted with a leather washer or like jointing
material, and excessive opening movement of the free end of the valve is pre-
vented by a stud screwed into the body of the plunger. The cup leather packing
of the plunger we keep in its working position by means of a ribbon or coil spring
placed within it in such a manner as to cause the expansion effort of the spring
to force the working surface of the leather against the wall of the cylinder.
With our improved combination door closer and check we are enabled to pro-
vide a larger and more effective leverage for the check action, and also to relieve
the stress on the door hinges.

page_text: Improvements relating to Door Closing, Appliances.
We, SAMUEL HILL, of 260, New John Street West, Cabinet Bar Fitter, and
ROWLAND HODGES, of 12, Frederick Street, Brass Founder, both in the City of
Birmingham, 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,
our object being to construct an effective and convenient combined door closer
and door check, from few and simple parts which can be readily constructed and
fitted together.
In the construction of our improved door closer and check, we employ a brass
or other metal cylinder or barrel and secure the same to a suitable plate for attach-
ment to the door. On the same plate we also mount the door closing spring box
of any ordinary construction having a lever mounted upon one end of its central
pin or axle for connection with the fixed bracket on the door casing. The lever
is also connected by a rod passing along the exterior of the barrel to the outer
end of the piston rod which projects through the end of the barrel remote from the
spring box.
The opposite end of the barrel is provided with an air vent, the
amount of opening being adjusted by means of a conically pointed stud.
The piston or plunger has an air passage formed through it which is auto-
matically closed on the in-stroke of the plunger by valve consisting of a strip
of steel secured at one side to the plunger but having its opposite end free or un-
attached. On the out stroke of the plunger the valve opens and allows the air
to pass from one side of the plunger to the opposite, side and thus prevents
the retarding of the opening movement of the door. On the closing movement of the
door, under the action of the spring, when the valve is automatically closed, the
air can only escape through the vent herein before described, and the amount of
the opening is so adjusted as to prevent violent closing of the door.
The face of the valve strip is fitted with a leather washer or like jointing
material, and excessive opening movement of the free end of the valve is pre-
vented by a stud screwed into the body of the plunger. The c
.cup leather packing
of the plunger we keep in its working position by means of a ribbon or coil spring
placed within it in such a manner as to cause the expansion effort of the spring
to force the working surfaces of the leather against the wall of the cylinder.
With our improved combination door closer and check we are enabled to pro-
vide a larger and more effective leverage for the check action, and also to relieve
the stress on the door hinges.
Referring to the two accompanying sheets of explanatory drawings:
-
Figure 1 is an elevation and Figure 2 a plan of our door closer and pneumatic
check mounted upon one common attachment plate.
Figure 3 is a sectional side elevation and Figure 4 an end elevation of our
improved air plunger or piston.
Figures 5 and 6 illustrate two forms of door check each containing a closing
spring within the check cylinder and fitted with our improved air plunger or
piston.
The Figures 3 and 4 are drawn to a larger scale than the Figures 1, 2, 5 and 6.
The same reference letters in the different views indicate the same parts.
In Figures 1 and 2 the air check cylinder or barrel A and the door closing
spring box B are both mounted upon the door attachment plate C. The lever D
from the spring box central pin, or axle is connected by the adjustable link E

page_text: with the fixed bracket F on the door casing, and is also connected by the rod G
with the outer end of the piston or plunger rod H projecting through the end of
the barrel remote from the spring box. The opposite end of the barrel is provided
with an air vent, adjustable by the screw J.
In Figures 5 and 6 the door closing spring K is arranged within the check
cylinder as illustrated, the cylinder being in each case mounted on the door A¹
whilst the piston or plunger rod is connected by suitable linkage with a bracket F
on the door casing F¹.
The piston or plunger for the check cylinder, as illustrated separately at.
Figures 3 and 4, has a metallic body part L, a cup leather or packing M, and a
retaining plate N secured to the body part by the screws n.
The air passage (
is controlled by the valve P; the extent of the opening of the valve is limited by
the stud p. The cup leather or packing M is pressed against the cylinder wall
by the expansive action of the spring Q.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
1. A combination door closer and pneumatic check constructed and arranged
substantially as and for the purposes described.
2. The construction and arrangement of parts forming the improved piston or
plunger for a pneumatic door check, substantially as described.
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1 1000
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicants.