Improvements in or relating to Gear for Opening and Closing Simultaneously Double Sliding Doors or Windows or the like.
Year: 1894

page_text: Date of Application, 2nd June, 1894-Accepted, 28th July, 1894
[Communicated from abroad by HUGH ROSE, of 102, Francis Street, Leichhard,
W. Sydney, New South Wales, Car Builder.]
Improvements in or relating to Gear for Opening and Closing
Simultaneously Double Sliding Doors or Windows or the like.
We ALEXANDER ROSE of 14 Albion Crescent Northampton, Clerk and
WILLIAM ROSE of 9 Perry Street Northampton, Traveller 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 :-
The object of this our invention is to provide a simple form of apparatus the
parts of which are so constructed and devised that when fitted in the frame work of,
and attached to, the door or window will when either half of the door or window is
being moved by hand at the same time move the other half thereby giving the full
width of doorway or passage in half the time & allowing the said doors half the
movement than would be necessary in the case of a single sliding door having to
slide its full width. This invention is also applicable to, designed and adapted for
cabin and other doors & windows & when fitted to cabin doors the risk & danger
which is usually attended when opening or closing in the case of a heavy roll of
the ship fitted with the ordinary hinged door and also banging is entirely obviated.
In carrying out this invention, the doors or windows are hung in pairs on sheaves
which travel on a track or rail in the well known manner.
For each pair of doors or windows a pair of sheaves which are set in the car
frame or door casement is provided over the sheaves a pair of cords bands or
chains, both connected with both doors or windows are rove in such a way that the
opening or closing of either door or window imparts a corresponding motion to the
other door or window of the pair.
We will now proceed to describe with reference to the accompanying drawing
the manner in which our invention is to be performed.
Fig. 1 is a front elevation of a tram car pair door, closed, the parts of the
apparatus which form the subject of this invention being shown over the door way
in dotted lines.
Fig. 2 shows a similar elevation with the parts of apparatus in view and showing
doors open.
Fig. 3 a cross section of the same.
Fig. 4 a sectional plan.
Fig. 5 an alternative arrangement fulfilling the same object but with rack and
pinion.
All letters correspond in figs.
A, A are the panels D, D¹ the doors E the pulleys or carriers C the guide rod or
bar over doorway. B car frame sides F & G sheaves over which are rove the chains,
straps or cords H, I. This chain strap or cord is attached to each door at the
positions N, N. Below the supporting carriers or pulleys E, and between the
hanger brackets O. we fix rollers of a convenient size J which minimise any
possibility of friction between the sliding doors and overhead rail when the chains
are being moved and brought into action in opening or closing doors or windows.
The two central hanger irons which receive the pull to & fro, we strengthen by
means of an angular strip P P Fig. 2 on each hanger.
To prevent any grinding action of the chains one with the other where they cross,
we make the sheaves F and G (better shown in the cross section) to have a slant or
cant with respect to the sheave bracket or frame the one right hand and the
other left.

page_text: In place of the chain arrangement we may also use a rack attached to each door
or window or in the case of vertically sliding sashes to each side thereof, each of the
said racks K. and L being geared to a rack pinion M as shown in Fig. 5 with
small guide rollers Q, Q on the back sides of said racks.
There is no novelty in the construction or combination of the doors and their
casements and carriers. The chain I is rove over the shieve F its ends are secured
one to each door or to one of the rollers thereon. The chain H is rove over the
sheave G and its ends are secured in the same manner as the ends of the chain I.
The action brought about by this construction is such that when either door or
window of the pair is moved, the other door or window of the pair moves with it
towards or away from the centre of the door space, and a balance is effected
whereby any tendency of one of the doors to move when (in the case of a car)
upon a grade or (in the case of a ship) when pitching or rolling is overcome by the
opposite tendency of the other door of the pair. The application of the invention
to a window is precisely similar.
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
1st. The combination with a pair of doors or windows, of a pair of sheaves and a
pair of chains or their equivalents rove over said sheaves and connected with
said doors or windows substantially as and for the purposes described.
2nd. The combination with a pair of doors or windows sliding horizontally
towards one another to close and away from one another to open, of a pair of
sheaves and a pair of chains or their equivalents rove over said sheaves and
connected with said doors or windows substantially as shown in Figs. 1 & 2 of the
drawings and for the purposes described.
3rd. The combination with a pair of sliding doors or windows of racks geared to
a pinion fixed to the frame work over the door, said pinion revolving on a fixed pin
causing each rack of the pair to move in opposite directions substantially as shown
in Fig. 5 and for the purposes described.
Dated this 11th dow of W 1804
HUGH ROSE.
ALEXANDER ROSE.
WILLIAM ROSE.
Robert Brown, M.I.M.E.