Improvements in Folding or Collapsible Gates, Shutters and the like.
Year: 1898

page_text: Date of Application, 7th Feb., 1898-Accepted, 19th Mar., 1898
COMPLETE SPECIFICATION.
Improvements in Folding or Collapsible Gates, Shutters and the like.
I, ALFRED CLARK, of 21, Sistova Road, Balham, S.W., in the County of Surrey,
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 relates to improvements in folding or collapsible gates, shutters and
the like of the now well known kind or class which are composed of a series of
upright rods or pickets connected by lazy-tongs or lattice-work arrangements of
diagonal connecting bars, so that the said upright rods or pickets can be moved
towards or away from each other to open-out or to collapse the gate, shutter or the
like, whilst maintaining the vertical rods or pickets constantly in parallelism with
each other.
Heretofore the connection of the ends of the diagonal bars or lazy-tongs with the
upright rods has been effected usually by pivot pins working in slots in the said
upright rods. As these slots extend through the rods from side to side, the arrange-
ment is open to the objection that the ends of the pins are exposed and are
consequently accessible to any person who might wish to force the pins out for the
purpose of effecting an entry through the gate, shutter or the like.
Now the purpose of the present invention is to overcome this objection and to
provide an arrangement which, whilst preserving the pin and slot type of connection,
will obviate the exposure of the ends of the pins and will so prevent the possibility of
the said pins being removed in the manner referred to.
To this end instead of providing the upright rods with slots extending through
then from side to side, I form them with elongated recesses, cavities or indentations
open only on their inner sides, their outer sides having projecting portions which
serve to cover in the said recesses and prevent access to the ends of the pivot
pins.
It follows therefore that in a gate, shutter or the like constructed in accordance
with my invention, the only way the ends of the pins could be reached would be by-
chipping off or drilling away the said projections which would obviously be a matter
of such difficulty as to practically preclude any chance of the gates or the like being
forced in the manner referred to.
In order that my invention may be clearly understood and readily carried into
effect I will proceed to describe the same by aid of the accompanying drawings which
illustrate a gate constructed according to my invention, and in which :-
Figure is a side elevation showing the said gate in its open or expanded
condition.
Figure 2 is a horizontal section on the line x x Figure 1.
Figure 3 is a vertical section on the line y y Figure 1.
Figures 4 and 5 are detail views to a larger scale showing respectively in section
and elevation, the formation of an indentation and its corresponding projection.
a are the upright rods or pickets of the gate, and are the diagonal connecting bars
or members of the lazy tongs. Each of the bars b at its centre is pivoted as at c to

page_text: one of the upright rods a and at its extremities is connected to the rods on either side
of that to which its centre is connected.
d are the pins with which the extremities of the rods are furnished for the purpose
of effecting the aforesaid connection, these pins being arranged transversely of the
rods.
e are the elongated recesses in the upright rods in which the said pins work
and are the projecting portions which serve to close the said recesses on their outer
sides.
These recesses and projections may be formed by indenting or stamping the rods
between suitable dies so that the metal displaced by the formation of the recesses e
serves to form the projections f.
The length of the recesses is such as to permit that amount of movement of the
pins d necessary to allow of the rods 6 turning freely upon their centres or pivots c.
In other words, the length of the slots is so adjusted that the pins in their
travel can move from the position shown in full lines to that shown in dotted lines
Figure 4.
It will thus be seen that a gate or the like constructed according to my invention
is burglar proof to a much greater extent than is a collapsible gate of the same kind
having open slots for the pins to work in. In fact almost the only way that access
can be had to the said pins is by chipping off or drilling the projections f and these
are of such thickness as to render it practically a matter of impossibility for a burglar
to effect their removal without arousing suspicion.
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. A collapsible gate, shutter or the like of the kind referred to having elongated
recesses opening only on the inner sides of the upright rods or pickets, substantially
as and for the purposes set forth.
2. A collapsible gate, shutter or the like of the kind referred to in the preceding
claim having projecting portions which serve to close the elongated recesses,
substantially as and for the purposes described.
3. A folding or collapsible gate, shutter or the like, constructed substantially as
herein before described with reference to the accompanying drawings.
Пятел LOIS зга ляѵ of reprнягу LAYA
Пател This ата пяѵ от гергиятѴ ТАУА
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.