Improvements in Door Closing Apparatus and Door Checks and in Alarm Apparatus Connected therewith.
Year: 1888

page_text: Date of Application, 15th Dec., 1888
Complete Specification Left, 12th Feb., 1889
Complete Specification Accepted, 11th May, 1889
Improvements in Door Closing Apparatus and Door Checks and in
Alarm Apparatus Connected therewith.
JOHN HENRY ABEL 28 Martin's Lane Cannon Street London E.C. Carpenter and
Joiner do hereby declare the nature of this invention to be as follows:
--
The object of this invention is for automatically closing doors and the like, and
also to prevent the door from slamming, and is an improvement on my specification
No. 13309 dated 14th September 1888 under application for Letters Patent and
consists as follows.
I provide a strong flexible airtight chamber, which I call the bellows, as it acts
like such, the frame of which is preferably made of wood and covered with leather,
or rubber cloth or any other airtight material and is preferably in the shape of a V.
Insido this bellows I provide a suitable spring and a valve for the egress of air
from the chamber or bellows, when compressed by the opening of the door. I also
provide a regulating valve for the admission of air into the bellows. I also
provide a suitable starting spring which may be attached to the door or bellows,
so as when the door is fully open it gives a start to the door. The bellows
are fixed on the wall (or if desired the bellows may be fixed on the door) and con-
nected with the door by means of a hinged lever or connecting rod. The working
is as follows. When the door is opened the bellows is compressed by the action
of the hinged lever, the air in the bellows by this operation, escaping through the
egress valve which is merely an aperture covered by a leather flap, and when
released, the expansion of the spring in the bellows causes them to open and air is
admitted which closes the egress valves and the bellows recovers its former position
and in doing so pushes the hinged lever and thus closes the door. An alarm in the
form of any wind instrument (such as a whistle) can be used so that it can be blown
by the air forced out of the bellows.
I propose casing the bellows in a suitable box so as to protect it.
is equally applicable to swing doors.
Dated this 14th day of December 1888
This invention

page_text: Alarm Apparatus Connected therewith.
JOHN HENRY ABEL 43 Vicarage Lane Stratford Essex Carpenter & Joiner 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 object of this invention is for automatically closing Doors and the like also 5
to prevent doors slamming and is carried out as follows.
provide a strong flexible air-tight chamber which I call the bellows as it acts
as such the frame of which is preferably made of wood and covered with leather
or rubber or any other airtight material and is preferably in the shape of a V.
Inside the bellows I provide a suitable spring and also a valve for the egress of air 1
from the chamber or bellows when compressed by the opening of the door. I also
provide a regulating valve for admission of air into the bellows. The bellows is
fixed on the door or transom and connected one to the other by means of one
or more hinged connecting rods, or levers. The working is as follows. When the
door is opened the bellows is compressed by the action of the hinged connecting rod, 1
rods or levers the air in the bellows by this operation escaping through the egress
valve which consists of an aperture covered on the outside by a flap of leather or other
suitable material; when the door is released the operation of the spring inside the
said bellows (which has become depressed by the opening of the door) causes it to
open (the bellows) and in so doing air is admitted in the bellows which closes the i
egress valve and the bellows recovers its former position and in so doing pushes or
pulls the hinged connecting rod, rods or levers and thus closes the loor An alarm
in the form of any wind instrument (such as a whistle) can be used so as it will be
blown by the air forced out of the bellows.
In order that my invention may be thoroughly understood, I proceed to further
describe the same by reference to the accompanying drawings.
Fig. 1 shows an elevation of my invention.
Fig. 2 shows a section.
Fig. 3 shows my invention fixed in position for working; the said bellows being
fixed to the door (or transom) and in this case connected with the transom by means
of hinged connecting rods or levers.
A framework of the bellows.
B. covering for same consisting of any airtight material secured by nails C.
D spring inside bellows.
T

page_text: Jhinged connecting rods the ends of which are fixed to the door H and the
bellows A.
Having now particularly described and ascertained the nature of my said inven-
tion and the manner in which the same operates I claim as new and desire to secure
by Letters patent
1. The application of the bellows as herein described for closing doors and the
like.
2. The combination of the aforesaid bellows and hinged connecting rod, rods or
levers together with the alarm herein described.
Dated this 12th day of February 1880
E. EATON & Co.,
Agents for Applicant.