Year: 1888

page_text: I HANS HENRIK SCHOU of 5 Raadhusstraede Copenhagen in the Kingdom of
Denmark 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:-
The object of this invention is a convenient and efficient device to be arranged in
connection with doors and the like to prevent the slamming of the same, that is to say
to act as a buffer stop to arrest the movement of the door and permit the same to
close quietly. A further object of the invention is to combine therewith a spring
actuated closing device so as to form in one device a door closer and stop.
Reference being made to the accompanying drawings-Fig. 1 is a side elevation of
the novel door stop, the door being fully closed. Fig. 2 is a side elevation and plan
with the door almost closed and the buffer brought into action. Fig. 3 is a side
elevation thereof before the buffer stop is brought into action. Figs. 4 and 5 are
respectively plan and vertical section of a modified form of door stop and a door
closer combined therewith.
The stop mechanism essentially consists of a rocking pivoted plate having horns
or projections against which a rod or abutment is adapted to strike so that the said
plate is rocked thereby and an elastic buffer thereon is brought into action to restrain
the impact of the door and to slide therefrom to permit of the closing of the door.
Thus in Figs. 1 to 3 A represents the door and B the frame thereof. On the frame is
fixed by screws or otherwise a plate Ca having a gudgeon C on which the plate b is
pivoted the latter is recessed on its upper edge as shown to form two horns or pro-
jections, and on the one end of this plate is fixed the buffer d and on the other the
counter poise g. so that the plate b is in unstable equilibrium on the gadgeon C. On.
the plate C is the flange the ends of which act as rest abutments for the plate b on
the one side or the other according to the position of the plate. On the door is
fixed the projecting rod a the end of which is bent rectangularly as shown in Fig. 2
and provided with a rubber sleeve i. The relative position of the two acting parts of
this dour stop, viz., the rod a and the plate b, is as shown in Figs. 1 to 3 and the plate b

page_text: being in the position shown in Fig. 3 the rod a when the door is shut falls against the
plate and revolves it upon the gudgeon so that the buffer rod d is raised and meets
the door, arresting the same to a great extent, the door however in arriving with force
against the elastic knot f forming the head of the buffer rod, compresses the same,
and the rod a is enabled to press over the plate b so as to lift the buffer rod, and suffer
the door to close, assisting also by the momentum given to it. To enable the device
to act exactly in the manner described the length of the buffer rod must be adjusted and
to enable this to be done, the buffer rod is formed as a screw bolt engaging in a Bocket
in the plate b and having an elastic head f, of rubber or the like. On opening the
door the rod a impinging on the rear horn of the plate b draws the same over into
the position shown in Fig. 3 where it is held by the moment of the weights of the
bar d and g, the rod a passing freely away with the door.
With a weighted plate b the device must be fixed in such a manner that the plate
swings in a vertical plane. By suitable slight changes in the construction the plate b
could be carried by the door and the rod a by the frame if desired. In the modifica-
tion shown in Figs. 4 and 5 the weights on the plate bare dispensed with and a spring
is substituted therefor, there is then no necessity to cause the plate b to swing only in
a vertical plane. In Figs. 4 and 5 it is pivoted to swing in an horizontal plane, and
the spring f' is so connected that the axis of the plate lies within or between the con-
necting points of the spring, so that it acts in the same manner as the weights before
described to draw the plate into its extreme position to the one or other side. In the
example here shown the plate b is made symmetrical and 'a socket is placed on each
side thereof for the screw bolt of the buffer-so that the same serve for a left hand or
right hand door. Another modification is also shown on the rod a, in place of curving
round the end of this rod to engage the horns of the plate b; a tightly wound spiral
wire is fixed thereon forming an elastic finger of sufficient rigidity to operate-the
plate yet sufficiently pliant to bend or give therein in case of jamming in the plate b
by reason of failure to act of any part of the mechanism.
This modified form of door stop is here shown in connection with a door closer.as
one device.
Within a suitable casing formed by the parts and m is journalled an
arbor koperated by a coiled spring in the barrel u, and carrying a flanged dram h¹
on which is coiled several times a strap or cord connected at one end thereto and
passing over a pulley g' to a ring b' fastened to the door. On opening the door the
strap or cord is rewound and the arbor k is revolved thereby winding the spring on
the same.
The tension of the spring afterwards operates to close the door. In order
that the tension of the cord may always operate perpendicularly to the plane of the
door. The ring b' is snpported by a bar a fixed at its ends to the door, and in order
that in fixing this device the rod a may find a correct position with regard to the
bar a² the latter is prolonged as a' to forin at its end a socket for the rod a.
spring fis attached at one end to a hook or eye s on the plate band at the other end
to a hook on the frame m. A similar hook r2 is placed symmetrically on the other
side of the frame for reception of the spring for changing the device for a left hand
opening door.
T'he
Having now fully described and ascertained the nature of my said invon-
tion and in what manner the same is to be performed I declare that what I
claim is ;-
1) A door stop comprising in combination a horned rocking plate 3 with buffer
stop f, and a rod a substantially as set forth.
2) A door stop comprising a pivoted horned plate b, an adjustable buffer stop f
spring or weight for actuating and holding said plate as set forth, and rod a with
sleeve or elastic finger al substantially as illustrated and described.
3) A combined door stop and closer comprising in combination, a pivoted horned
plate having buffer stop f and operated substantially as set forth a spring
actuated drum, a cord, or the like wound thereon and connected for closing the
door by tension of said spring, and a rod a adapted to operate said plate 6 in the
manner described.

page_text: 4) A combined door stop and closer comprising in combination, a frame, a spring
actuated revolvable drum therein, a cord or the like on said drum, a horned rocking
plate pivoted to said frame, and spring fl arranged as set forth thereon, a reversible
and adjustable buffer stop fon said plate, a rod having an elastic finger al for
operating said plate a bar having an extension supporting said rod a, and a
ring 6' sliding on said bar a² and connected to said cord or the like, for fixture and
operation as set forth.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C.,
Agents to Applicant.