Improvements in Door-closing Apparatus and Door Checks.
Year: 1895

page_text: Date of Application, 12th Mar., 1895
Complete Specification Left, 12th Dec., 1895-Accepted, 12th Mar.,
1896
PROVISIONAL SPECIFICATION.
Improvements in Door-closing Apparatus and Door Checks.
JAMES ADAMS Engineer 7 Union Street, Borough, Southwark, London do
hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in door closing springs and checks to
prevent slamming. It contains a new system of lubrication to its working parts,
prevents waste of oil, promotes cleanliness, and to be a constant lubricator. It also
contains angular adjustable levers.
In carrying out my invention I proceed mainly as follows-
On the door or frame I apply a cylinder-one end of this cylinder is carried by
a hinged bracket (this bracket may be fixed to either the door or frame). It
contains a piston composed of an adjustable leather cup, a valve, back plate, and
piston rod, a cover at each end, an inlet hole in one of the covers, and an adjustable
outlet hole at the other end.
This cylinder may also contain the spring which actuates on the door, or it may
be used for the check only.
The above is one part of the apparatus.
The other part consists of a spindle carried by a bracket (this bracket is fixed to
either the door or frame) to this spindle I attach two or more adjustable levers and
the actuating spring when necessary.
To one of the levers I joint the piston rod, to another lever I joint a link. This
link is attached or jointed to the door or frame.
To each joint I attach a cup into which parts of the joints dip for the purpose of
Jubrication (when necessary to use a roller I extend the boss into the cup). The
action of this apparatus is such that when the door is opened the spring becomes
compressed and the piston changes its position, the air passing from one end of the
cylinder to the other. On the return of the door the air forms a cushion against
the power of the spring, escapes through the adjustable outlet and allows the door
to close silently.
This apparatus can be applied to double action doors.
1
100m
Improvements in
JAMES ADAMS 7 and 11 Union Street Borough London S.E. Engineer 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 relates to improvements in door closing springs and checks to
prevent slamming. It contains a new system of lubrication to its working parts to
prevent waste of oil, to promote cleanliness, and to be a constant lubricator. It
also contains angular adjustable levers.

page_text: In carrying out my invention 1 proceed as follows, reference being had to the
accompanying drawings.
DESCRIPTION OF THE DRAWINGS.
The same letters of reference indicate corresponding parts in all the figures.
Fig. 1. Elevation of my invention complete as fixed to the door frame z, and to
the door y, a, the cylinder b, the bracket, (the bracket to which the cylinder is
hinged, is screwed on the door frame z, by screws p,) d, the piston rod, to which is
fixed the crosshead d', this crosshead works on the crank pin, its end dipping into
the oil cup m, this crank-pin 2, with the oil cup m, is fixed to the camlever k, as
shown in Fig. 2, 3, 4.
The camlever is hinged or jointed to the bracket j, which carries the bearing
for the joint pin ", the bracket j, also carries the bearing for the lever 1, by its
joint pin i, this bracket j, is also screwed to the frame z, by screws p.
The lever 1, carries a friction wheel q, by the pin ", this friction wheel works in
the camlever groove thus uniting the action of the two levers and l. The other
end of the lever 1, is attached to the bracket o, by the adjustable link s, as shown
in Fig. 2, or by a friction roller running in a groove as shown in Fig. 9, the
brackets o, being screwed to the door y.
Fig. 2. Plan of Fig. 1.
Fig. 3. Part sectional plan of Fig. 1, showing the door y, open, the position of
internal arrangement of the cylinder spring and piston.
Fig. 4. Complete sectional elevation of Fig. 1, showing the internal arrangement
of all the working parts.
Fig. 5. Elevation of the bracket j, and the ends of the levers' bearings which
dip into the oil cups m.
9,
Fig. 6. Enlarged sectional elevation of the cylinder joint showing the outlet
hole G, and the regulating screw t, which is made to cover the end of the hole
and a porous packing u, for silencing any noise which may be made by the confined
air escaping.
Fig. 7. Sectional elevation of the piston rod crosshead d'.
Fig. 8. Enlarged sectional detail of the lubrication cups m, and the manner by
which every bearing with its spindle throughout this apparatus is made to work in
the lubricant placed therein.
Fig. 9. Plan of the sliding bracket used for connecting the lever 1, to the
door.
Fig. 10. Elevation of adjustable link bracket.
Fig. 11. Sectional elevation of friction rollers as carried on lever l.
On the door y, or frame z, which is shown by the dotted lines, I apply the
cylinder a, one end of this cylinder a, is carried by a hinged bracket 6, this
bracket b, may be fixed either to the door y, or frame z, according to the direction
required by the opening of the door. This cylinder a, contains a piston c, composed
of an adjustable leather cup, described and set forth in my Patent September 10th
1890 No. 14218, the piston rod d, which passes through the cover e. and the spiral
spring h. The covers e, and e¹, are screwed to each end, the one contains the inlet
hole f. To the other, e', is fixed or screwed the cylinder hinge n, by the plug as
shown in Fig. 4.
In the centre of this plug I form the outlet hole g, this hole g, is crossed by a
regulating or adjusting screw t, as shown in the enlarged Fig. 6. In one part of
this outlet hole, I place a porous substance u, for making the air escapement
noiseless. This cylinder a, without containing the actuating spring may be used
for the checking only.
The above describes one part of this apparatus.
The other part consists of a spindle or spindles i, i, carried by the bracket j
(this bracket may be fixed either to the door y, or frame z,) to these spindles i, ¹,
I attach two levers k and l, and an actuating spring when necessary, to the lever k,

page_text: I joint the piston rod d, by d, to the other lever I joint a link this link s, is
attached or jointed to the door y, or frame z. The lever 1, is also connected to the
lever k.
To each joint of this apparatus I attach a cup m, into which, parts of the joints
dip for the purpose of lubrication. When necessary to use a roller q, I extend its
boss into the cup m.
The action of this apparatus is such that when the door y, is opened (see Fig. 3)
the spring h, becomes compressed, and the piston c, changes its position, the air
passing from one end of the cylinder a, to the other.
On the return of the door y, the air forms a cushion against the power of the
spring h, escapes through the adjustable outlet as shown in Figs. 4 & 6 which
allows the door y, to close silently.
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 is
1st. The combination of the two levers & l, and united to the piston rod d,
substantially as described and shown in the drawing whereby I obtain by their
action, increased power on the door, whilst the tension of the spring decreases.
2nd. The combination of the two levers & 1, substantially as described and set
forth in the drawings for door springs and checks.
3rd. The manner of fixing the joint into the cover of the cylinder substantially
as set forth and described in the drawing Fig. 4.
4th. The manner of governing the check outlet, and the porous packing u, to
prevent hissing as shown in Fig. 6 or any mere modification thereof.
5th. The system of lubrication as described and set forth in the drawings for
door springs or checks joints or any mere modification thereof.
6th. The combination of all the parts for closing doors and for checking the
same substantially as described and illustrated in the drawings.
Dated this 12th day of December 1895.
JAMES ADAMS.