Improvements in Panic Door Bolts.
Year: 1893

page_text: Date of Application, 10th Oct., 1893
Complete Specification Left, 21st June, 1894-Accepted, 21st July, 1894
PROVISIONAL SPECIFICATION.
Improvements in Panic Door Bolts.
I, THOMAS JONES, of No. 9 Southampton Row, W.C., in the Administrative
County of London, Manufacturer's Agent, do hereby declare the nature of this
invention to be as follows
-
My invention relates to Improvements in Panic Door Bolts, and the object of it
is to provide improved means for bringing the pressure of any individual or crowd
in a hurry, to bear upon the holding bolts of a door so as to ensure their withdrawal
being effected as rapidly as the hurry of the said individual or crowd may render
desirable.
A bar
In carrying the invention into effect, I provide a disc the axis of which is fixed to
the door in any suitable way. The bolts of the door-say top and bottom-are
connected in any convenient way-preferably by links, to opposite ends of a
diameter of the disc.
pivotted to or otherwise connected to the disc near
its periphery in such a way that the pressure above mentioned shall move it in a
line tangential to the disc. This motion of the bar will rotate the disc and with-
draw the bolts. A suitable stop is provided to arrest the circular motion of the
disc. This stop may take the form of an angle projecting from the disc and
adapted to engage in a corner of the bolt case.
Provision for withdrawing the bolts from their sockets by means of a key or
wrench in the hands of an individual on the other side of the door, may be made
in any suitable way, such as by means of a rotatable square or socket to be
engaged by the key or wrench and toothed or worm gearing between it and the
disc. I do not confine myself to the details of the mechanism by which rotary or
linear motion on the part of the key produces a rotary one in the disc.
L 10th dow of October 1893
PHILLIPS & LEIGH,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Panic Door Bolts.
I, THOMAS JONES, of No. 9 Southampton Row, in the Administrative County
of London, Manufacturer's Agent, 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 :—
My invention relates to Improvements in Panic Door Bolts, and consists in
improved means for bring the pressure of any individual or crowd, in a hurry, to
bear upon the holding bolts of a door, in such a way as shall ensure the withdrawal
of them from their sockets being effected as rapidly as the hurry of the said
individual or crowd, may render desirable to any party concerned in, or for, either
individual, crowd or hurry.
In carrying the invention into effect, I provide a disc rotatable upon an axis
which is fixed to the door in any convenient way. The bolts of the door-both at
top and bottom-are connected in any suitable way, preferably by links, to opposite
ends of a diameter of the disc. A bar is pivotted to or otherwise connected to
the disc near its periphery in such a way that the pressure above mentioned shall
move it in a line tangential to the disc. Such movement of the bar will accordingly
rotate the disc and withdraw the bolts.

page_text: Suitable guides and stops are provided for the links, disc and bar, as well as
suitable mechanism for actuating the bolts from the outside of the door.
In order that my invention and the means by which it is to be carried into
practical effect may be thoroughly understood, I will proceed to describe it and
them in detail, referring in so doing to the accompanying figures which are to be
taken as part of this Specification and read therewith.
Figure 1 is a sectional side elevation of part of a door, the improved means
above mentioned and the top and bottom holding bolts.
Figure 2 is a side elevation illustrating a modified form of the said improved
means.
Figure 3 is a front elevation of a pair of swing doors, each of which is fitted
with a panic door bolt constructed according to the present invention.
Figure 4 is a plan of a pair of rebated doors fitted with a panic door bolt con-
structed according to the present invention and fitted with pressure bars adapted to
meet the special requirements of the case.
Figure 5 is a sectional side elevation of part of a door, a further modification
of the improved means above mentioned, the top and bottom holding bolts and a
method of actuating the bolts from the outside of the door.
Figure 6 is a front elevation, partly in section, corresponding with Figure 5.
Figure 7 is a front elevation corresponding with Figures 5 and 6.
Figure 8 illustrates the mechanism for actuating the door bolts from the outside
of the door.
The full lines in all the figures illustrate the bolted position of the invention and
the dotted lines of Figure 5, the unbolted one.
Referring to Figure 1, a is the door to which the holding bolts are fixed. This
may be a single door, or it may be each of a pair of swing doors-see Figure 3-
or it may be the last to be closed, a', of a pair of rebated doors-see Figure 4.
Whichever be the door that carries the holding bolts, that is the one to which the
improved means above mentioned are fixed. b is the top bolt and 6', the bottom
bolt. b, b, 63, 6 are their respective sockets. c is the case of the said improved
means. It is of any suitable construction and may be held to the door a in the
manner illustrated.'
d is a disc held within the case c by its axle d'. The latter
has its bearings in the sides of the case (as clearly shewn in Figure 6), being
consequently parallel with the door and holding the disc d in a plane at right
angles therewith. The bolts b, b¹ are connected to opposite sides of the disc don
a diameter thereof by links e, e. The ends of the latter are pivotted to the
adjacent bolt ends and to the disc by pins e³, e³, respectively. ff are guides
projecting from the sides of the links e, ef up to the opposite (opposite, that is, to
the pins) side of the case c, their function being to keep the links up to their
work. c is a horizontal ledge extending from the front of the case to the back
and from the side of the case opposite to the guides f,f, as far as to stand over the
disc d. g is the bar above mentioned. It is preferably angular in cross section in
order that it may be connected the more easily with both the ledge c' and the
disc d. The motion which it is necessary that the bar g should, for the purpose of
the present invention be capable of, is a reciprocating linear one through the front
of the case c and parallel with the disc d. The said front has a boss where the
bar 9 passes through it. A suitable guide and stop are provided to direct and
limit the said motion, thereby forming the connection between the bar and ledge.
This guide and stop are shewn as consisting of a longitudinal slot gl in the top
flange of the bar g and a cheese headed stud 9 the shank of which is passed
through the slot g' and screwed into the said top flange. The connection between
the bar and disc is shewn as consisting of a stud 9 projecting from the disc d and
engaging in a slot g* in the vertical flange of the bar g. This slot is a vertical
one and is long enough to admit of the stud riding up it for a distance
corresponding with the travel of the holding bolts b, & into their sockets. The
relative positions of the pins e³, the slot gl and the stud 9 are as follows. When
the bolts b, b', are in their sockets, the slot g¹ has its inner end up to the adjacent

page_text: side of the stud 9 and the stud g is at the bottom of the slot g*. h is a pressure
bar standing across the door a. One end of it is pivotally connected to the outer
end of the barg, e.g., by being loosely held in a knob fast upon the said end of
the bar while the opposite end is somewhat loosely held in a knob h² fast on the
door. The bar h stands, as heretofore, at the proper height from the ground for
the individual or crowd above mentioned to press or to be pressed against it without
it being necessary for any one to look for it or to reach up or down to it. j is a
stop working in the top of the boss c². As soon as the bolts b, bare withdrawn
from their sockets, it drops into a socket j¹ in the bar g, thereby locking the bolts
in their retracted position. The bar i could then be used as the ordinary bar
handle.
The invention acts as follows. As soon as the bar is pushed towards the
door a, the bar g is moved into the case c through the front thereof and the disc dis
rotated far enough to withdraw the bolts b, b' from their sockets, whereupon the door
is thrown open.
In the case of rebated doors, the first door to be closed, a³,-see
Figure 4-also carries a pressure bar i mounted in two knobs ", which are the
counterparts, respectively, of the knobs ', ' already described. Both pressure
bars h, are prolonged through the knobs, and past each other, their adjacent
ends being bevelled, that of the second pressure bar i overlapping the end of the
other one in order that whatever push the bar i is subjected to shall be forthwith
communicated to the bar h. The knob is carried by a spindle capable of a
reciprocating linear motion in a socket from which it is normally protruded by an
internal compressible spring not shewn in the figure.
Referring to Figure 2, the modification illustrated thereby, consists in substituting
a link k and pivots k', k¹, for the stud g and slot g*.
Referring to Figures 5, 6 and 7, the modification illustrated thereby, consists in
the connection between the bar g and the disc d consists of a rack g' on the bottom
edge of the said bar and a spur wheel I fast to the said disc, both wheel and rack
being always in engagement.
Any suitable means may be provided for bolting or unbolting the bolts from the
outside of the door: two are illustrated in the drawings but the invention does not
limit me to any in particular for I may use any which provides for the disc receiving
the necessary rotary motion.
Referring to Figure 5, the front edge of the web m of the key m' is cut to gear,
after the manner of a rack, with the spur wheel 1. The key is introduced into the
саве с through a suitable keybole and turned up until the teeth on the front edge
of the web m engage with the spur wheel. It is then pushed to unbolt the
bolts b, b, and pulled to bolt them. It must be disengaged from the spur wheel
and its web turned down to face the keyhole, before it can be withdrawn from the
саве с.
n is
Referring to Figure 8, the mechanism therein illustrated consists of a double
bitted key, and a pair of mitre gears one of which has its bearing in the case c and
is under the control of the key and the other is fast to the axis of the disc d.
a mitre pinion fast on the axle d' of the disc d. With it gears the mitre pinion n¹
with which there is combined a circular boss or journal n³ on its opposite side,
which journal has a suitable bearing formed for it in the back of the case c.
the centre of the boss or journal, there is a cavity n³ adapted to receive the double
bitted key n. A key hole n is cut in the door a of the proper contour for
admitting the key to the cavity n as well as for allowing of its withdrawal
therefrom.
In
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 :-
:-
1. The combination of the hereinbefore described improved means consisting of
links, disc and bar, with pusher bar and door bolts.
2 The combination with a pair of door bolts, disc and links connecting the said

page_text: bolts thereto, of a bar capable of a tangential motion with respect to the said disc
and devices by which its motion is communicated to the said disc.
3. The combination with a pair of door bolts, disc and links connecting the said
bolts thereto, of a bar capable of a tangential motion with respect to the said disc,
devices by which its motion is communicated to the said disc and a stop adapted to
engage in the said bar and to provide for the bolts being locked in their retracted
position.
4. The combination with a pair of door bolts, disc and links connecting the said
bolts thereto, of the hereinbefore described improved means for withdrawing the
bolts and of means for actuating the bolts in either direction from the outside of
:the door.
Dated this 21st day of June 1894.
.
PHILLIPS & LEIGH,
22, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.