Improvements Appertaining to Sliding Sashes for the Doors of Railway and other Vehicles.
Year: 1897

page_text: 'Date of Application, 5th Feb.,
1897
Complete Specification Left, 5th Nov., 1897-Accepted, 11th Dec.,
1897
PROVISIONAL
SPECIFICATION.
Improvements Appertaining to Sliding Sashes for the Doors of
Railway and other Vehicles.
We, JAMES AITKEN of 59, Thynne Street, Bolton in the County of Lancaster,
Commercial Traveller, and WILLIAM ARTHUR HOWARTH of 6, Ashburner Street,
Bolton aforesaid, Auctioneer, do hereby declare the nature of this invention to be as
follows:-
That is to say It relates to the application of means whereby the sliding sashes in
or for the doors of railway and other vehicles may be readily moved and held as desired,
such means being also of simple construction and therefore not liable to derangement.
In carrying our invention into effect we mount the sliding sashes in the usual
manner but instead of using the well known lifting straps we secure to said sashes,
cords, chains or like flexible attachments, which we arrange to pass over guide pulleys
mounted in suitable positions on the framework in which said sashes slide, so that
they (said cords or the like) may be wound upon drums or barrels mounted in any
appropriate position most suitable for the requirements of those desiring to operate or
move the sliding sashes.
The said barrels or drums are arranged to be operated by suitable gearing wheels,
so proportioned that by a partial revolution of their operating handle a full revolution
may be travelled by the barrel.
To maintain the barrels in any desired position so as to secure the sashes at a
higher or lower level, ratchet mechanism is mounted on the bearings supporting the
gearing wheels or otherwise to come into contact with said wheels, while lever or other
devices are employed for disengaging said ratchet mechanism when the sash has to be
moved.
Instead of separate ratchet mechanism being employed, the handle for operating the
gearing is or may be constructed so as to form such ratchet while a stationary toothed
quadrant with which it has to engage is mounted in proximity with it so that when-
ever the handle is laid-hold-of, by those desiring to move the sash, the ratchet is
moved clear of the teeth in the quadrant and so the operating parts may be freely
moved.
The guide pulleys over which the cords, chains or the like are conducted for raising
the sash, may be situated above said sash or by this latter having projections extend-
ing beneath it for the attachment of said cords etc., then the said pulleys may be
mounted beneath the sash. In all cases these pulleys as also all the other parts are
so arranged that they are well covered in by the framework of the door.
Dated the 4th day of February 1807
J. AITKEN
W. A. HOWARTH
per Samuel Hey, Agent.

page_text: Improvements Appertaining to Sliding Sashes for the Doors of
Railway and other Vehicles.
We, JAMES AITKEN of 59 Thynne Street, Bolton in the County of Lancaster,
Commercial Traveller, and WILLIAM ARTHUR HOWARTH of 6 Ashburner Street, Bolton
aforesaid, Auctioneer 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 :-
That is to say-It relates to the application of means whereby the sliding sashes
in or for the doors of railway and other vehicles may be readily moved and held as
desired, such means being also of simple construction and therefore not liable to
derangement.
In the accompanying sheets of drawings:-
Fig. 1 is an elevation showing a door as seen from within the vehicle and with the
sash raised to its highest position.
Fig. 2 is a similar view to fig. 1 but shows the door with the covering boards as
removed from its lower half in order that the mechanism beneath might be more
clearly seen.
Fig. 3 is a similar view to fig. 2 but shows the sash in its lowest position.
Fig. 4 is also similar to fig. 2 but shows the sash in about its half raised position.
Fig. 5 is a sectional view on line A. B of fig. 4.
In carrying our invention into effect we mount the sliding sashes a in the usual
manner but instead of using the well known lifting straps we secure to said sashes,
cords, chains or like flexible attachments b which we arrange to pass over guide
pulleys as at c and c' (the former being mounted in bearings secured to the sash a
while the latter is mounted in the position shown on the framework d in which
said sashes a slide) the end 61 of said cord or the like 6 being secured to the
framework d and its other and to the drum or barrel f which is mounted to rotate
upon its spindle g carried by the framework d.
The barrel f is arranged to be operated through its pinion h by the toothed
quadrant k to which is secured the handle m. This quadrant k and its pinion h being
so proportioned that by a partial revolution of their operating handle m the barrel f
is made to travel through a full revolution, by which means sufficient of the cord or
the like b is wound thereon to raise the sash a from its lowest position as shown by
fig. 3 to its highest position shown by figs. 1 and 2.
To maintain the barrel f in any desired position so as to secure the sash a at a
higher or lower level as shown, indents or hollows p are formed in a portion of
the quadrant's periphery for the reception of an antifriction pulley s which is
carried by the lever t acted upon by the spring w, by which means the pressure of
this spring w causes the pulleys to press with sufficient force against the quadrant k
to hold same from revolving when said pulley s is in one or other of said indents P in
this manner the barrel f is held from being revolved by the weight of the sash a as
will be well understood.
We are aware that this mechanism for holding the sash may be dispensed
with by the employment of any other of the varied and well known kinds of ratchet
mechanism in place of it, but for simplicity and durability we preferably employ
the mechanism shown and described.
Furthermore it may be possible for the guide pulleys c c¹ to be arranged in different
positions to those shown, or even a larger number of these guide pulleys than we
describe may be employed, but such arrangements would add to the cost and detract
from the efficient operations of the mechanism, hence we have not illustrated the

page_text: varied methods of arrangements we might have followed because we consider the one
shown and described, to be the most suitable.
Having now particularly described and ascertained the nature of our said
invention, and in which manner the same is to be performed, we declare that
what we claim is ;—
1. In mechanism for operating sliding sashes, cord, chain or like flexible coupling
means, barrels for said cords or the like to be wound upon, gearing wheels and winch
mechanism for operating same and spring lever mechanism for retaining the sashes
in position in combination substantially as herein specified.
2. In mechanism for operating sliding sashes, cords or the like, barrel for operating
same, gearing wheels and indents quadrants together with means for operating in
conjunction therewith substantially as herein set forth.
3. The barrel, gearing retaining mechanism for operating sliding sashes the same
being constructed and arranged to operate substantially as herein specified.
4. The improved mechanism for operating sliding sashes the same being constructed
and arranged substantially as herein specified.
Dated this on day of November 1897.
J. AITKEN
W. A. HOWARTH
Per Samuel Hey,
Agent.