Improved Apparatus for Adjusting the Position of Sashes in Railway Carriage, Tram Car, and other Windows.
Year: 1894

page_text: Date of Application, 22nd May, 1894-Accepted, 7th July, 1894
COMPLETE SPECIFICATION.
Improved Apparatus for Adjusting the Position of Sashes in
Railway Carriage, Tram Car, and other Windows.
I DAVID THOMPSON SEYMOUR of Gleurosa, Brisbane, in the Colony of Queens-
land, Gentleman, do hereby declare the nature of my invention for IMPROVED
APPARATUS FOR ADJUSTING THE POSITION OF SASHES IN RAILWAY CARRIAGE
TRAM CAR AND OTHER WINDOWS and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:-
My invention relates to apparatus by means of which the sashes of windows may
be raised or lowered to any height in the frame and is specially applicable to the
windows of railway carriages tram cars and the like.
The object of the invention is to provide apparatus which is simple in its
construction and which can be easily fitted to existing windows with little
expense.
One form of the apparatus consists of two bolts working in grooves in the top
cross bar of the sash which bolts take into ratchet bars in the frame of the
window and retain the sash at any desired height. The said bolts are operated
by means of a finger piece at the centre of the cross bar. The finger piece is
attached to a slide which works in slots in a metal plate and which carries inside
in a recess in the cross bar a cam which on being drawn up by means of the finger
piece forces back the free arms of two curved levers, these levers are fulcrummed
at or near their centre and the lower arm of each is pivotted to one of the bolts.
Each end of a coiled spring is secured to a projection on the lower arm of each
lever. The tendency of the spring is to force the bolts outward so that their
hevelled heads catch in the teeth of the ratchet bar and thus retain the window at
the desired height. By forcing the finger plate upwards the cam pushes apart the
free arms of the lever which overcoming the resistance of the spring draw the heads
of the bolts clear of the ratchet bars.
In order that the cam may rise vertically it is provided with a groove which
slides along an upright metal piece fixed between the two levers.
I may only employ one bolt and ratchet bar in which case there would only be
one curved lever.
In another form of my apparatus the bolt is as in the other forced outwards by
means of a coiled spring but is withdrawn from the ratchet bar by means of a
finger or pawl secured to the spindle of a handle, the said finger engaging in a notch
in the bolt.
But in order that my invention may be clearly understood I will now describe
same with reference to the accompanying drawings in which:-
Fig. 1 is an elevation of my improved apparatus applied to the window of a
railway carriage or tram car.
Fig. 2 is a sectional elevation of the top cross bar and part of the frame looking
from without the window.
Fig. 3 is an elevation looking from within the window and showing the mechanism
in dotted lines.
Fig. 4 is a sectional elevation looking from without the window illustrating the
employment of one bolt and lever.
Fig. 5 is an elevation looking from within the window of a modification of the
apparatus while
Fig. 6 is a sectional elevation looking from without the window.
2

page_text: Figs. 2, 3, 4, 5, and 6 are drawn to a larger scale than Fig. 1.
The same reference letters indicate like parts.
A is the top cross bar of the sash of a window. A¹ A' are the bolts carrying
bevelled heads A' A' which catch into and are retained by the teeth of the
ratchet bars A which are preferably of metal and screwed into the frame of the
window A. A are cover plates.
B B are the levers fulcrummed on the studs B' and pivotted at B2 to the bolts A¹.
B³ are projections on the levers B and on which are secured the ends of the coiled
spring C.
Dis the cam which is operated by means of the finger piece E on the slide E' on
which are studs working in the slots E² and carrying the cam. D¹ is the guide
piece for the cam. D is a stop piece and for preventing the spring getting out
of position.
The operation of the apparatus is as follows:-When it is desired to raise or
lower the window the cam D is raised by means of the finger piece E on the
slide E. The convex sides of the cam acting on the concave arms of the levers B
thrust their free arms outwards, and the lower arms being pivotted to the bolts A¹
at B compress the spring C and draw the heads of the bolts clear of the ratchet
bars A on the frame. On allowing the slide E¹ and cam D to drop, the spring C
as well as the cam D forces the lower arms outwards and therefore the bolts into
the ratchet bars.
The operation of the apparatus shown in Fig. 4 is similar to that illustrated
in Figs. 1 to 3 with the exception that only one lever and bolt and a ratchet
bar on one side of the frame are employed. In the modification illustrated in
Figs. 5 and 6-
A is the top cross bar of the sash. A is the bolt carrying bevelled head A².
A³ ratchet bar. C coiled spring one end of which fits on end of bolt A. F is notch
in bolt. G is finger or pawl secured on spindle H of the handle K.
On giving the handle K a quarter turn the finger G engages in the notch F
on the bolt and compressing the spring C draws the head A² clear of the
ratchet bar A³.
When one bolt is used I prefer to provide a friction roller L on the opposite
upright of the sash.
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. Improved apparatus for adjusting the position of sashes in railway carriage
tram car and other windows consisting of the combination with the cross bar of the
sash of a window of a bolt or bolts such as A' lever or levers such as B spring such
as C and ratchet bar or bars such as A³ the said lever or levers being operated by
means of a cam such as D substantially as herein before described and explained
and illustrated in Figs. 1 to 4 of the drawings.
2. Apparatus for adjusting the position of sashes in railway carriage tram car
and other windows consisting of the combination with the cross bar of the sash of a
window of a bolt such as A having notch such as 'F finger such as G on the
spindle of a handle spring such as C and ratchet bar such as A substantially
as hereinbefore described and explained and illustrated in Figs. 5 and 6 of the
drawings.
D. T. SEYMOUR.
Bottomley & Liddle,
154, St. Vincent Street, Glasgow, Applicant's Agents.