Year: 1886

page_text: I, LLEWLLEYN AUGUSTUS PARROCK of Tower Road Aston near Birmingham in the
County of Warwick, Foreman Smith do hereby declare the nature of this invention
to be as follows:-
This invention has for its object the raising and lowering of railway and other
carriage windows, as hereinafter described; whereby the said windows are perfectly
balanced and rest in any position in which they may have been placed, instead of
employing securing straps, bands or other suspending or affixing expedients
commonly employed; thus by a mechanical arrangement, a window is suspended
and balanced in such a manner, that it can be raised or lowered by the slightest
force applied, and is self sustained in any position in which it may have been placed.
In carrying out my invention, I will describe it in connection with a railway
carriage door.
The window which is made to slide vertically within a box formed within the lower
part of the door, as is common with windows of this class, consists essentially of a door
with a window aperture or opening at its top, and a box like part at its bottom or
lower part, and wherein the latter, the window slides.
Depending from the underside of a cross bar, forming the bottom to the window
aperture or the top to the box part before named, are two broad rollers working
within bracket bearings secured or affixed at some considerable distance apart; and at
the lower or bottom part of the box, two similar rollers or brackets are situated at the
same distance apart as the upper two before named; and around these rollers, broad
endless ends pass and travel parallel to each other, and it is by these bands, that
the window is raised and lowered.
At two points on the outside portions of these bands, the bottom portion of the
sliding window frame is connected, by brackets or otherwise; so that on the window
being raised and lowered, the bands are caused to travel in a corresponding manner
over the rollers; and to the back portions of these bands, a single weight (in the form
of a bar) disposed transversely is secured, and when the window is up, the lower end
of its frame, is secured to the extreme upper parts of the endless bands, while the

page_text: transverse weight is attached or connected to the bottoms of the said endless bands ;
so that when thus arranged, the weight and window are equally balanced.
On the lowering of the window, the endless bands are caused to travel over their
pulleys, and in so doing, the weight is correspondingly raised; so that when the
window is fully down, the weight is at the top of its traverse, and when the window is
up, it is at the lowest part of its traverse; and in consequence of the window and
weight having the same gravitating effect, the window is retained in any position to
which it may be placed.
The transverse weight which is the counterpoise to the window, is provided with
return ends, which work within open joints or longitudinal slots cut within tubes,
stiles or the like, so as to form traversing guides which admit of the motion of the
weight with the least possible friction.
Instead of employing endless bands, single bands may be used instead. In this
modification, the lower fixed pulleys attached to the framing are dispensed with, and
the top ends of the bands attached to the bottom of the window frame, while their
lower ends are attached to the cross weight, and with the said pulley passing over only
the rollers suspended from the underside of the top bar before named.
Instead of a single weight, I may arrange to work the window by double weights
if necessary, by enclosing the weights within grooves in the stiles, but in each case,
the window is at one end of: he bands, and the weight at the other.
Instead of employing bands, flexible metallic or other cords may be used instead.
Windows constructed according to my invention, remain always balanced, and
therefore are opened and closed with the greatest ease, as the window and weight are
the same in weight, and any vibration or oscillation imparted thereto, does not affect
its position, as the weight and window are always equally pulling against each other.
Dated this Nineteenth day of October 1886.
EWLLEYN AUGUSTUS PARROCK.
By Henry Skerrett,
6, Livery Street, Birmingham,
Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Railway and other Carriage Windows.
I, LLEWLLEYN AUGUSTUS PARROCK of Tower Road Aston near Birmingham in the
County of Warwick, Foreman Smith, 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 invention has for its object the raising and lowering of railway and other
carriage windows, as herein-after described.
By my invention, the said windows are perfectly balanced, and are thereby made to
rest in any desired position in which they may have been placed, without employing
securing straps, bands or other suspending or affixing expedients now commonly
employed.
I will describe my invention in connection with the window of a railway carriage
door, which consists essentially of a door, with a window aperture or opening at top,
and a box like compartment at bottom, and within which latter, the window slides and
rests, when the window aperture as aforesaid, is not required to be closed.
Figure represents partly in elevation, and partly in longitudinal vertical section,
a railway carriage door, provided with window raising, lowering and affixing
mechanism, constructed according to my invention, and in which said figure 1, the
window is shown in its raised or closed position-Figure 2 represents a longitudinal
vertical section upon the dotted lines A B figure 1, showing how the endless band,
rope or cord with a counterpoise weight passes over upper and lower pulleys or
rollers, secured to the fixed framing of the door-Figure 3 represents a like view as
figure 2, but with the window lowered.
a is the door frame, consisting of fixed uprights a², a², and top and bottom cross-
bars a³; and disposed and working within the lower box part at of the said door, are
two endless bands b, b, working over rollers or runners c, c, and connected or secured
at their outsides at d, to the window e, and which connection is effected by the inside
parts of the bands, being fixedly secured to plate brackets e², e², depending from the
lower side of the framing of the said window.
The rollers or runners c, c, are carried by, and run within brackets f, secured and
attached to the upper bar as, and the lower part of the framing a³.
The bands are disposed parallel to each other, and when moved up or down, the
window frame to which they are connected, is raised and lowered accordingly.
g is a counterpoise weight, common to both bands, and secured or carried by the
two inner bands of the endless bands-This counterpoise weight is conducted by
rods ; and when the window is raised or lowered, the said weight moves up and
down the rods which act as guides.
Thus, the means of raising and lowering consists essentially of two endless bands,
travelling over rollers, and connected at their upper outer ends (when the window is
raised) to the window framing, while the bar weight which acts in common for the
two bands, is secured and carried by the lower parts of the bands, when the window is
in its said raised position as in figure 1.

page_text: By arranging the weight, and connecting the window to the bands as represented,
the window becomes balanced; so that on the lowering of the window, the endless
bands are caused to travel over their pulleys or runners, and in doing so, the weight
is correspondingly raised as shown in the section figure 3.
When the window is fully down as shown at figure 3, the weight is at the top of its
traverse, but when the window is up, then the weight is at the lower part of its
traverse as represented in figure 1, and in consequence of the weight being alike in
gravitating effect, the position of the window always remains the same, after having
once been adjusted.
Instead of employing two endless bands arranged parallel to each other, a single
band may be used; and instead of the window counterpoise weight being guided by
rods, its ends may work in grooves made in the sides or stiles a² of the framing of the
door, or in any other convenient manner.
Figure 4 represents a means of adjusting, or giving the requisite tension to the
bands, on the same becoming slack-It consists of a screw i, sliding bracket
carrying a roller c, and which bracket works within guides k² of a bracket-plate k,
affixed and let within the transverse bar a³.
These adjusting devices can be secured at the upper or lower, or both parts of the
framing, and may be of any other equivalent construction, answering the purpose
required.
By rotating the screw i, the bracket is raised without rotation, thus imparting to
the band to which it is connected, the necessary tension or adjustment required.
Although I have heretofore spoken of endless bands, yet I wish it to be understood
that cords, straps, chain or the like, may be used instead of bands.
The requisite degree of tension, or the necessary adjustment, may be given to the
bands, by ordinary buckle adjustment devices.
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 :-
First. Balancing and raising and lowering carriage windows, by means of an
endless metallic or other band, or by means of endless metallic or other bands, cords
or the like, connected, arranged and working substantially in the manner, as herein
described and set forth.
Secondly. Balancing and raising and lowering carriage windows by means of
endless metallic or other bands (or a band) in combination with a counterbalance
weight, substantially as and for the purpose herein-described and set forth.
Thirdly. Tightening or adjusting endless bands as herein described, by means of a
device, or its equivalent, substantially as represented in figure 4.
Fourthly. The means herein-described of balancing, raising and lowering carriage
windows, by means of endless metallic or other bands, cords or the like, passing over
pulleys or wheels connected with fixed brackets, secured to the upper and lower or
other convenient parts of a carriage or other door or window, and with the bands
connected respectively to, and working with a counterpoise weight, and the window
to be raised, substantially as described and illustrated in the several figures of the
drawings.