Door Stops or Devices for Holding Doors Open.
Year: 1891

page_text: Date of Application, 25th Sept., 1891
Complete Specification Left, 8th June, 1892-Accepted, 16th July, 1892 ·
PROVISIONAL SPECIFICATION.
"
"Door Stops or Devices for Holding Doors Open.
We EDMUND TAYLOR of 9 Huddersfield Road New Hey Rochdale in the
'County of Lancaster, Clerk and HAROLD CLIFF of 28 Moston Road Chadderton
Oldham in the County of Lancaster, Clerk do hereby declare the nature of this
invention to be as follows:-
The object of our invention is to provide means for holding doors, especially those
to which springs are attached, in any desired open position without injuring the
floor or walls.
In one form of our "door stop" a screw is carried vertically and prevented from
rotating by brackets secured or formed on the back of a face plate which is let into
the lower end of the front edge of the door. A nut with milled or serrated edge is
placed on the screw so that the edge of the nut projects through a slit in the face
plate thereby enabling the nut to be rotated on the screw from the front of the face
plate. The nut is also, by projecting through the face place, prevented from
moving up or down and therefore when the nut is rotated the screw is raised or
lowered as the case may be. The lower end of the screw is suitably shaped and
covered with leather, gutta percha, india rubber, cloth or other material so that
when the screw is lowered by the rotation of the nut projecting through the face
plate the end of the screw will press upon the floor and hold the door in the position
desired. The face plate is suitably sunk at the part where the nut projects. so that
the edge of the nut is flush with the edge of the door.
Instead of the lower end of the screw being formed solid to press on the floor a
small plate covered with suitable material as before described is pivoted to the end
of the screw. By this means any movement of the door will tend to move the plate
sideways and so increase the pressure. We obtain the same result by means of a
small roller which runs in an inclined slot formed in the lower end of the screw
which is made T shaped for the purpose, and also by means of a small inclined
plane which is capable of sliding on a corresponding incline formed on the lower
end of the screw.
In another form of our "door stop" we dispense with the use of a nut and screw
and substitute a rod and rack. The back of the face plate has a rack formed or
secured on it. A projection on the rod takes into the rack and provides the
resistance to the upward pressure of the floor. A spring keeps the projection on
the rod in gear with the rack. The top end of the rod projects through the face
plate so as to enable the rod to be pressed down on to the floor and also so that the
rod may be pushed back out of gear with the rack when it is required to raise the
rod. The lower end of the rod which presses on the floor we form in the same
manner as the end of the screw previously described.
In another form of our "door stop
we use the screw or the rod and rack
previously described to operate a small cam which is pivoted at the bottom of the
face plate. The screw or the rod and rack presses the cam round on its pivot till
it comes in contact with the floor and firmly wedges the door in position.
Dated this 24th day of September 1891.
EDMUND TAYLOR.
HAROLD CLIFF.

page_text: COMPLETE SPECIFICATION.
"
"Door Stops
We EDMUND TAYLOR of 9 Huddersfield Road, New Hey, Rochdale in the
County of Lancaster, Clerk and HAROLD CLIFF late of 28 Moston Road,
Chadderton, Oldham and now of 118 Heatherstall Road North, Oldham in the
County of Lancaster, Clerk, 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 :-
or Devices for Holding Doors Open.
The object of our invention is to provide means for holding doors, especially those
to which springs are attached, in any desired open position without injuring the
floor or walls. For this purpose we provide a screw carried vertically and prevented
from rotating by brackets secured or formed on the back of a face plate which is
let into the lower end of the front edge of the door. A nut with milled or serrated
edge is placed on the screw so that the edge of the nut projects through a slit in
the face plate thereby enabling the nut to be rotated on the screw from the
front of the face plate. The nut is also, by projecting through the face plate,
prevented from moving up or down and therefore when the nut is rotated the screw
is raised or lowered as the case may be. The lower end of the screw is suitably
shaped and covered with leather, gutta-percha, indiarubber, cloth or other material
so that when the screw is lowered by the rotation of the nut projecting through the
face plate the end of the screw will press upon the floor and hold the door in the
position desired.
The face plate is suitably sunk at the part where the nut
projects so that the edge of the nut is flush with the edge of the door.
Instead of the lower end of the screw which presses on the floor being formed in
one piece with the screw a small plate covered with suitable material is pivoted to
the end of the screw. By this means any movement of the door will move the plate
sideways and thus increase the pressure of the screw on the floor and hold the door
more rigidly.
The accompanying drawings represent the door stop herein before described.
Fig. 1. is a plan of the door stop, Fig. 2. is a side elevation, and Fig. 3. represents
a back elevation of the same.
The same letters of reference are used for corresponding parts in each figure.
a is a face plate having a sunk part in which a slot g is formed. On the back of
the face plate are nugs or brackets in which holes are drilled corresponding in
shape to the section of the screw c. The screw c works up and down in the holes in
the brackets bb' and in order to prevent it rotating the screw c is planed flat on one
or more sides one flat side being shown in Fig. 3. A milled nut d, the edge of
which projects through the slot g, actuates the screw c. The nut d is prevented
from moving up or down by the slot g. At the lower end of the screw c is a foot
plate e. The foot plate e is pivoted to the screw c by means of a pin running
through two small flanges formed on its back as shown in Fig. 2. and Fig. 3. The
foot plate e is thus capable of moving sideways round its pivot. The bottom of the
foot plate e is covered with indiarubber or other suitable material f. The whole
mechanism is let into a mortice in the lower end of the front edge of the door so
that the face plate a is flush with the edge of the door.
When the nut d is rotated in the proper direction the screw c is lowered and
presses the foot plate e on to the floor and thus holds the door in the position
desired. If the door moves when the foot plate e has been screwed down on to the
floor the foot plate e will either slide along the floor or be turned sideways round
its pivot; the material f, however, with which the foot plate e is covered is intended
to have as large an amount of friction on the floor as possible so that this friction
will be great enough to prevent the foot plate e sliding along the floor. Therefore
the movement of the door will cause the foot plate e to turn sideways on its pivot.
Now the centre is that point of the bottom of the foot plate e which is least distant

page_text: from the centre of the pivot round which the whole foot plate e turns; and, more-
over, when the foot plate e is screwed down on to the floor this point rests on the
floor and is in a vertical perpendicular line with the centre of the pivot.
Consequently when the foot plate e turns sideways with the movement of the door
the point of contact between the floor and the foot plate e is changed and this point
of contact is at a greater distance from the centre of the pivot than before. Also,
since the centre of the pivot is stationary, except when the screw c is actuated by
the nut d, the perpendicular distance between it and the floor remains unchanged
and therefore an increase of pressure takes place when the foot plate e turns
sideways and the material f. with which the foot plate e is covered is compressed to
the extent which it would otherwise project beyond the perpendicular distance
between the centre of the pivot and the floor. In this manner when the door moves
after the foot plate e has been screwed down to the floor it is held more rigidly or
the door may be described as being more firmly "wedged" in position.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what
we claim is :-
.
A door stop or door holder substantially as and for the purposes described and
illustrated in and by the accompanying drawings.
Dated this 6th day of June 1892.
EDMUND TAYLOR.
HAROLD CLIFF.