Improvements in Sliding Doors or Gates.
Year: 1894

page_text: Date of Application, 30th Jan., 1894
Complete Specification Left, 30th Oct., 1894-Accepted, 15th Dec., 1894
PROVISIONAL SPECIFICATION.
Improvements in Sliding Doors or Gates.
I, FREDERICK GEORGE KELTY CASTON of 29 Great Dover Street, London, S.E.
Metal Worker do hereby declare the nature of this invention to be as follows:-
This my invention relates to improvements in sliding doors or gates, for all
purposes, where such are in pairs, and more especially to sliding doors or gates for
lifts or hoists, or to doors or gates used in the enclosures of lift spaces.
The object of my invention is to provide a means whereby both doors or gates
may be opened or closed simultaneously, so that by moving one in either direction,
the other is moved automatically with it.
In order to carry out this my invention, I provide two pulleys, fixed preferably
in a horizontal position, one at each end of the door or gate space, and sufficiently
far apart to allow the gates to slide freely between them.
These pulleys may be fixed either at the top or bottom of the door or gate space,
as may be most convenient, and I preferably fix them in bearings either attached
to or near the rail upon which the doors or gates slide, and in such a way that the
pulleys revolve centrally with the centre line of the doors or gates aforesaid.
I provide an endless rope, cord, or chain, which passes round the outer half of
the grooved periphery of each pulley, one half of this said cord or chain travelling
on the inside, and the other half on the outside of the doors or gates.
I attach the cord or chain to one of the doors or gates, and that portion of the
cord or chain which is on the other side, I attach to the other door or gate.
It is obvious that by sliding one of the doors or gates, the cord fixed to it moves
with it, and that portion of the cord on the other side of the door or gate moving of
course in an opposite direction causes the other door or gate to which the cord is
fixed, to move with it likewise, so that which ever door or gate is moved, the other
moves simultaneously and automatically in an opposite direction and both are
opened and closed together.
Dated this 30th day of January 1894
COUMI LEIE
SPECIFICATION.
Improvements in Sliding Doors or Gates.
I, FREDERICK GEORGE KELTY CASTON, of 29 Great Dover Street
Borough S.E. Wire and Metal Worker, 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 my invention relates to improvements in sliding doors or gates for all
purposes where such are in pairs, and more especially to sliding doors or gates of
lifts, or hoists, or to doors or gates used in the enclosure of lift spaces.
The object of my invention is to provide a means whereby both doors or gates
may be opened or closed simultaneously, so that by moving one in either direction,
the other moves automatically with it.
In order to carry out this my invention I provide two pulleys fixed either in a
horizontal or vertical position, one at each end of the door or gate space, and
sufficiently far apart to allow the doors or gates to slide freely between them.
LO
درم

page_text: These pulleys may be fixed either at the top or bottom of the door or gate space,
as may be most convenient, and I preferably fix them in bearings or on pins either
attached to or near the rail upon which the door or gate slides, and in such a way
that the pulleys revolve centrally or thereabouts with the centre line of the doors
or gates.
I provide an endless rope, cord, or chain, which in the case of pulleys fixed
horizontally, passes round the outer half of the periphery of each pulley, one half
of this said cord or chain, travelling on the inside, and the other balf on the outside
of the doors or gates.
In the case of the pulleys being fixed vertically, the cords or chains pass above
and below each other, and are secured to the doors or gates by clips or other
convenient means. I attach the cord or chain to one of the doors or gates, and
that portion of the cord or chain which is on the opposite side of the end pulleys,
I attach to the other door or gate.
It is obvious that by sliding one of the doors or gates, the cord fixed to it moves
with it, and that portion of the cord which is fixed to the other door or gate moving
of course in an opposite direction, causes the door or gate to which the cord is fixed,
to move with it likewise, so that whichever door or gate is moved, the other door
or gate moves simultaneously, and automatically in an opposite direction, and both
open and close together.
In order that my invention may be clearly understood, reference is made to the
accompanying drawings, in which
Fig. 1, represents a general elevation of a pair of iron gates, sliding by means of
rollers which revolve on a rail fixed above the gates and provided with the pulleys
and cord or chain herein before mentioned.
Fig. 2 is an enlarged broken view, shewing the method of carrying the end
pulleys (in this illustration shewing a pulley working vertically) and likewise the
means of hanging the gates from rollers working above. Fig. 3 is a sectional end
view of the same.
The same letters have reference to the same parts in the respective views.
A and A' being a pair of gates shewn closed, the same being shewn in open position
by dotted lines at A2 and A³. B is the iron or metal roller path extending along the
whole travel of the gates, and terminating in end bearings, upon which is fixed at
each end, a pin bearing carrying the rope or chain wheels C, C. This roller
bar may be fixed to the transom of the door space or opening, by distance
pieces, D, D, D, D, and screws as shewn in end section (Fig. 3) at E.
F, F, F, F are rollers, revolving in hanging brackets G, G, G, G, which are
fixed to the tops of the gates or doors. The endless cord or chain H passes round
each end pulley C, and the lower length of the cord is secured to the top of gate A¹
by a clip and pin J, or other convenient mode of fastening, and the upper length,
is secured to a pin or plate fixed preferably to one of the hanging brackets of
gate A as shewn at K.
It will be readily understood that the lower portion of the cord travels in an
opposite direction to the upper portion, and therefore the gate to which each
respective portion is fastened, travels with it, automatically and simultaneously in
opposite directions, and whichever gate is caused to move, the other gate of
necessity moves at once in a contrary direction, either opening or closing together.
Where horizontal end pulleys are used, the roller transom bar is provided
with a slot at each end, in which revolves in suitable bearings the aforesaid end
pulleys, the cord or chain in this case moving on either side of the roller bar, being
secured to the gates in a similar manner to the vertical pulley arrangement.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is :-
:
1. The provision of sliding doors or gates for lifts, lift enclosures, or other
purposes, that shall be automatically and simultaneously opened or closed,

page_text: substantially as set forth, and herein described and illustrated by the accompanying
drawings.
2. The application of this invention to any form of sliding doors or gates,
substantially as set forth and herein described and illustrated by the accompanying
drawings.
Dated this 20th day of October 1901
FREDK. G. K. CASTON.