An Automatic Door Stop.
Year: 1893

page_text: Date of Application, 30th Aug., 1893
Complete Specification Left, 26th Feb., 1894-Accepted, 7th Apr.. 1894
PROVISIONAL SPECIFICATION.
An Automatic Door Stop.
1, EDGAR DREDGE, of 15 Edmund Place, Aldersgate Street, London, in the
County of Middlesex, Engineer, do hereby declare the nature of this invention to
be as follows:-
This invention consists of a door stop by which the door can be held open at any
desired width and when not required can be easily put out of action.
It consists of a back plate screwed on to the lower part of the door and
having at the top and bottom two lugs projecting at right angles to the back
plate, through holes in which there slides a vertical bolt, which has at the
bottom an enlarged end or roller to engage with the lower lug and prevent the
rod rising too far. Round this vertical bolt between the two lugs is placed a
spiral spring, abutting at the top end against the upper lug and at the other
end against a knob or handle projecting from the sliding bolt. This knob
engages with a stud on the back plate which forms a stop when the door stop is
not in use.
To bring the doorstop into use, the knob on the sliding bolt is turned off the
stud on the backplate, when the coiled spring at once forces the bolt down on
to the floor thus holding the door where required. When not required the knob
can be raised up and turned round so as to engage again with the stud thus taking
the sliding bolt off the ground.
Dated this 30th day of August 1803
S. S. BROMHEAD,
97, Newgate Street, E.C., Agent for Applicant.
COMPLETE SPECIFICATION.
An Automatic Door Stop.
1, Edgar Dredge, of 15 Edmund Place, Aldersgate Street, London, in the
County of Middlesex, 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 consists of a door stop by which a door can be held in position
at any desired extent of opening, and which stop can be easily put out of action
when not required.
My invention will be readily understood by reference to the accompanying sheet
of drawings, wherein
Fig. 1 is a side view of my apparatus fitted onto a door;
Fig. 2 is a front view of same;
Fig. 3 is an elevation of the sliding rod B detached; and
Fig. 4 is a sectional plan of the preferred form of the said sliding rod on the
line x-y of Fig. 3.
On the lower part of the door is screwed or otherwise fastened a back plate A
having at top and bottom thereof two lugs A1 A3, through holes in which lugs
slides a vertical rod or bolt B. This bolt B has at bottom an enlarged rounded
end or button B¹ having a convex face or bearing surface on its underside, or
roller, and higher up, a knob or ring B' serving as a handle.
Poies 77

page_text: Between this handle B2 and the upper lug A², a spiral spring C surrounds the
vertical bolt. In Figs. 1 and 2 the spring is shewn compressed, and the door stop
raised into its inoperative position. The position the bolt takes when the door
stop is in use is shewn in dotted lines in Fig. 1.
To keep the parts in the position shown in full lines in Figs. 1 and 2, so that the
door is free to be moved, the handle is taken hold of, and the sliding bolt pulled up
until the grooved part thereof marked B³, clearly shewn in Fig. 3, is level with
the upper lug A'; the handle is then turned so that the overhanging part of the
bolt B comes over the straight side of the hole in the lug A2, whereby the bolt is
held, and cannot go down again until the handle is turned.
When it is desired to adjust the door in any particular position, the door is
moved to that position, and the handle B2 is turned out at right angles to the
door, the flat side or sides of the upper part of the bolt B being thus brought
opposite the straight edge or edges of the hole in the upper lug A2 the bolt is
now free to pass through and is immediately forced down by the spring so as to
press its knob or button B' on the floor, and thereby, restrain the door from
moving.
Instead of having the upper part of the bolt made with a flat side, and going
through a hole with a straight edge in the lug A2, a square bolt may be used
passing through a square hole, so that when the handle is turned, the angular
sides of the bolt overhang the hole in the lug, and the bolt is held up thereby.
If desired the bolt may be held inoperative when required by means of a stop pin
projecting from the back plate, with which stop pin the handle B² engages when
turned to one side. If two stop pins are used, one to right and one to left of the
bolt, the handle may then be turned to either side to fix the bolt.
This latter arrangement however, which is shewn in dotted lines in Figs. 1 and 2,
is not so convenient and simple as that previously described.
By my invention I provide a simple, cheap and effective door-stop, which will
not do any injury to carpets if employed on a door of a carpeted room and
which may be quickly put in and out of action, and when out of action, the
door may be opened and shut without any inconvenience from the presence of
the stop apparatus; and if the door is moved by force, the convex face of the
knob at the lower end of the bolt will slide over the carpet without breaking the
apparatus and without tearing the carpet.
Having now particularly described and ascerta ed the nature of my said inven-
tion, and in what manner the same is to be performed I declare that what I
claim is :-
1. A door stop for automatically holding a door in any required position,
consisting of a back plate A, lugs A' A², vertical bolt B passing through said
lugs, said bolt having thereon a knob, button or roller B' for holding the door, a
handle B2 for putting the device in and out of action, a groove B³ to allow of
the bolt being turned, and a flat side or sides for preventing the bolt descending
when so turned, and a spring for forcing down the bolt when set free as herein
set forth.
2. A door stop for automatically holding a door in any required position
consisting of a back plate A, lugs A¹ A³, vertical bolt B passing through said
lugs, said bolt having thereon a knob, button, ller B' for holding the door, a
handle B2 for putting the device in and out of action, a spring for forcing down
the bolt, and one or more stop pins or studs for engaging with the handle B² when
required to keep the bolt up, as herein set forth.
Dated this 26th day of February 1894.
S. S. BROMHEAD,
97, Newgate Street, Agent for Applicant.