Ax IMPROVED APPLIANCE FOR HOLDING RAILWAY CARRIAGE AND OTHER WINDOW IMPROVED APPLIANCE FOR HOLDING RAILWAY CARRIAGE AND OTHER WINDOW SASHES PROVISIONAL SP
Year: 1872

page_text: LETTERS PATENT to Dougald Ballardic, of Glasgow, in the County.
of Lanark, North Britain, Upholsterer, for the Invention of "Ax
IMPROVED APPLIANCE FOR HOLDING RAILWAY CARRIAGE AND OTHER WINDOW
IMPROVED APPLIANCE FOR HOLDING RAILWAY CARRIAGE AND OTHER WINDOW
SASHES
PROVISIONAL SPECIFICATION left by the said Dougald Ballardie at
the Office of the Commissioners of Patents, with his Petition, on
the 12th June 1872.
I, DOUGALD Ballardie, of Glasgow, in the County of Lanark, North
Britain, Upholsterer, do hereby declare the nature of the said Invention
for "AN IMPROVED APPLIANCE FOR HOLDING RAILWAY CARRIAGE AND OTHER
WINDOW SASHES," to be as follows:-
This Invention has for its object the fitting of a railway carriage or
other window with a simple appliance for holding the sash in any
desired position whilst permitting of the opening, closing, or adjustment
thereof more conveniently than in arrangements hitherto in use.

page_text: The Invention consists in arranging a small roller of a suitable elastic
material, such as vulcanised rubber, in the side of the window frame,
and in a position for the frame of the sash to bear on it, such roller
having metal journals fitted to move in inclined slots in the sides of the
cavity containing the roller. The inclination of the slots is such that
their upper parts are further in than their lower parts, and when the
sash is being raised the roller tends to run up the slots, and by thus
going further in to relieve the sash from pressure, and allow it to rise
freely. On the sash being let go in any position the roller runs down
the inclined slots, and in doing so acts like a wedge and jauns the sash;
the roller can however still turn, and although the mere weight of the
sash is not enough to turn it, a little additional downward pressure is
quite sufficient for lowering the sash when required.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Dougald Ballardie in the Great Seal Patent Office
on the 11th December 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, DOUGALD
BALLARDIE, of Glasgow, in the County of Lanark, North Britain,
Upholsterer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twelfth day of June, in the year of
our Lord One thousand eight hundred and seventy-two, in the thirty-
fifth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Dougald Ballardie, Her special licence
that I, the said Dougald Ballardic, my executors, administrators, and
assigns, or such others as I, the said Dougald Ballardic, my executors,
administrators, and assigns, should at any time agree with, and no others,
from time to time and at all times thereafter during the term therein
expressed, should and lawfully might make, use, exercise, and vend,
within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "AN IMPROVED APPLIANCE FOR
HOLDING RAILWAY CARRIAGE AND OTHER WINDOW SASHES," upon the condition
(amongst others) that I, the said Dougald Ballardie, my executors or
administrators, by an instrument in writing under my, or their, or one of
their hands and seals, should particularly describe and ascertain the

page_text: nature of the said Invention, and in what manner the same was to be
performed, and cause the same to be filed in the Great Seal Patent
Office within six calendar months next and immediately after the date
of the said Letters Patent.
NOW KNOW YE, that I, the said Dougald Ballardie, do hereby declare
the nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement in writing, reference being had to the accompanying
Drawings, that is to say :-
My said Invention has for its object the fitting of a railway
carriage or other window with a simple appliance for holding the sash
in any desired position whilst permitting of the opening, closing, or
adjustment thereof more conveniently than in arrangements hitherto
in use.
And in order that my said Invention and the manner of performing
the same may be properly understood, I hereunto append a Sheet of
explanatory Drawings to be herein-after referred to, and representing
my improved appliance as fitted in the frame of a railway carriage
window. In these Drawings the same reference numerals are used to
mark the same or like parts wherever they are repeated.
Figure 1 on the Sheet of Drawings is a sectional clevation showing a
part of the sash frame 1 of a railway carriage window, also a part of the
window frame 2, the latter being in vertical section.
My Invention consists in arranging a small roller 3 of a suitable
elastic material, such as vulcanised rubber, in the side of the window
frame 2, and in a position for the frame 1 of the sash to bear against it
laterally, such roller 3 having a metal centre with journals 4 fitted to
move in inclined slots 5 in the sides of the cavity containing the roller 3.
The inclination of the slots 5 is such that their upper ends are further
from the sash 1 than their lower parts, and when the sash 1 is being
raised the roller 3 runs up the slots into the position in which it is
shown in Figure 1, and by thus going further inwards relieves the
sash from pressure, and allows it to rise freely. On the sash 1 being
let go in any position the roller 3 runs down the inclined slots 5, and
getting into the position in which it is shown in Figure 2 acts like a
wedge, and jams the sash 1; the roller 3 can however still turn, and
although the mere weight of the sash is not enough to turn it, a little

page_text: additional downward pressure is quite sufficient for lowering the sash
when required. The roller 3 is conveniently held in a brass mounting 6,
of which Figure 3 is a face view, and which is fixed by screws in a
mortise or cavity formed for it in the window frame 1. The inclined
slots 5 are formed in side flanges 7 formed on the brass mounting, and
a wire or pin 8 is fixed across at the back, which is encountered by the
back of the roller 3 when moving up or down, and which ensures the
Similar
proper movement of the journals along the inclined slots.
mountings with elastic rollers may be fitted at both sides of the window
frame; in general however it will be quite sufficient to apply the
contrivance at one side only.
Having thus particularly described my said Invention, and the manner
in which the same is to be performed, I have to state that I do not
restrict myself to the precise details herein described or delineated; but
that what I believe to be novel and original, and claim as the Invention
secured to me by the herein-before in part recited Letters Patent is,
the applying of an elastic roller held by metal journals in inclined slots
for holding railway carriage and other window sashes, as herein-beforc
described.
In witness whereof, I, the said Dougald Ballardie, have hereunto set
my hand and seal, this Tenth day of December, in the year of
our Lord One thousand eight hundred and seventy-two.
DOUGALD BALLARDIE. (L.S.)