[0001] This invention relates to a door stop and in particular to a door stop for holding
a door captive in the open position.
[0002] In the prior art various types of door stops have been known. One such door stop
is described in United States Patent 1,626,422 (Mutispaugh) in which a swinging member
has a tapered nose which provides a sliding surface for the door to engage in the
open position. This device engages the undersurface of the door and hence the door
will have to be hung above a pre-determined level from the surface of the floor. In
United States Patent No. 230,422 (Kelly) is described a door stop which engages the
door from the underside of the base. The door stop described in United States Patent
No. 1,494,790 (Kuhrt) can only be mounted after structrual changes to the floor above
which the door is hung are effected. United States Patent No. 1,667,771 (Chiapparelli)
a door stop is arranged to operate from a recess formed in the floor. In United States
Patent 245,082 (Massey) a door stop is arranged to engage the undersurface of the
door. The door stop shown in United States Patent No. 914,798 (Connor) engages the
upper surface of a door. United States Patent No. 1,280,048 (Lavender) describes a
door stop in which a swinging member has an extreme position in which it is checked
by a part of a wall of other fixed structure located close to the door.
[0003] It is an object of the invention to provide a door stop which mitigates the disadvantages
of the prior art and is simple to operate.
[0004] According to the invention a door stop comprises an element and a base plate for
mounting with a door, the element being hinged on an axis for rotation between a first
position in which a forward surface of a door is adapted to strike at least one of
two spaced apart members found on the element and a second position in which the members
abut the forward and rear surfaces of the door, the base plate including a stop member
arranged to restrict movement of the element beyond the extremes of the first and
second positions.
[0005] In a preferred form of the invention the element is mounted on the base plate and
hinged on an axis passing through the base plate. Preferably the spaced apart members
are formed on the element and arranged to lie in the part of movement of the forward
surface of the door, such that on striking one of the members the other member is
moved to abut the rear surface of the door and hold the door captive between opposed
faces of the members.
[0006] Preferably the door stop member comprises a pin connected to the element and arranged
to slide in a groove formed in the base plate which includes a second stop formation
located remote from the groove. The base plate is preferably removably attached to
the element and includes means for receiving the element in at least two positions
such that the door stop may be used for both right hand and left hand operating doors.
[0007] The element and the base plate are preferably mountable on a floor of the building
such that in the open position of the door a forward surface of the door strikes one
of opposed faces of the element to cause the other opposed face to move in the path
of the door. In striking this opposed face the first opposed face moves in to hold
the door captive in position. The door may preferably be released from this position
by moving one of the opposed faces clear of the part circumscribed by the edge of
the door thus permitting opening or closing thereof.
[0008] An embodiment of the invention is described by way of example with reference to the
accompanying drawing in which is seen a perspective view of a door according to the
invention.
[0009] Referring to the drawing a door stop 10 comprises a base plate 12 on which is mounted
a bracket 14.
[0010] The base plate 12 comprises a flat sheet which is triangular in plan and having a
slot 16 formed approximately midway of the triangle. The bracket 14 is hinged on a
shaft 18 which is mounted on the plate 12 and passes through a bore formed in the
plate. A further bore 19 is formed in the plate 12. A screw 20 carrying a sleeve is
mounted at the apex of the base plate 12. The base plate 12 is fixed on the floor
of a building in a conventional manner and arranged to lie in the path of the circle
circumscribed by an edge of the door 26.
[0011] The bracket 14 comprises a plate having spaced apart upstanding formations 22. The
surface 23 of one of the upstanding formations 22 is contoured to form a nosing section.
The distance between the upstanding formations 22 corresponds substantially to the
thickness of the door 26 such that the door may be held captive between these faces.
A pin 24 connected to the undersurface of the bracket 14 is mounted for movement in
the slot 16.
[0012] In use of the invention the door stop 10 is mounted in a position in which a door
has to be anchored, which generally is in the fully opened position. The door stop
10 is mounted with the shaft 18 located at the rear side of the door such that when
the door moves from the closed to the open position the forward edge strikes the nose
23 which causes the bracket 14 to move outwardly and the edge of the door to strike
the inside face of the formation 22 which in turn causes the formation 22 having the
nose 23 to move back into position and engage the door 26. Movement beyond the extreme
positions is checked by the pin 22 sliding in a slot 16 and by the screw 20. When
the door is to be closed the formation 22 having the nose 23 is moved outwardly using
the foot thus releasing the engaging position of the door-stop 10 and enabling the
door 26 to be closed.
[0013] The base plate 12 has an additional bore 19 which enables the screw 20 to be mounted
therein and the shaft 18 to take the place of the screw 20 hence enabling it to be
used for doors opening in a direction opposite to that seen in the drawing.
[0014] The features disclosed in the foreoging description, in the following claims and/or
in the accompanying drawings may, both separately and in any combination thereof,
be material for realising the invention in diverse forms thereof.
1. A door stop comprising an element and a base plate for mounting with a door, the
element being hinged on an axis for rotation between a first position in which a forward
surface of a door is adapted to strike at least one of two spaced apart members formed
on the element and a second position in which the members abut the forward and rear
surfaces of the door, the base plate including a stop member arranged to restrict
movement of the element beyond the extremes of the first and second positions.
2. A door stop according to claim 1 in which the element is mounted on the base plate
and hinged on an axis passing through the base plate.
3. A door stop according to claim 1 or claim 2 in which one or both spaced apart members
formed on the element are arranged to lie in the path of movement of the forward surface
of the door such that on striking one of the members the other member is moved to
abut the rear surface of the door and hold the door captive between opposed faces
of the members.
4. A door stop according to any one of claims 1 to 3 in which the base plate is removably
attached to the element and includes means for receiving the element in at least two
positions.