Improvements in Means for Automatically Supporting Railway Carriage Door and other Sliding Window Sashes.
Year: 1890

page_text: Date of Application, 1st July, 1890
Complete Specification Left, 1st Apr., 1891-Accepted, 2nd May, 1891
PROVIDIUNAL
DI MULTIVATION.
Improvements in Means for Automatically Supporting Railway
Carriage Door and other Sliding Window Sashes.
I, EBENEZER WARING, of 18 Roundle Street, Attercliffe, Sheffield, in the
County of York, Engineer, do hereby declare the nature of this invention to be as
follows:-
The object of this invention is to provide simple and efficient means for
automatically supporting railway carriage door and other sliding window sashes.
According to this invention I attach a casing to the side, or one on each side,
of the sash frame and countersunk therein. The interior of this casing is formed
of a wavy or undulating shape. A flat steel spring is so fixed within this casing
that it partakes of the undulating shape of the interior and is therefore always
under tension. A block reversely corresponding to the undulations of the interior
of the casing is placed on this spring, and is of such a shape as to lie flush
with the side of the sash frame to which it is fitted. The tension of the spring
however being compressed between the two undulating surfaces, will tend to push
the block laterally away from the sash frame and will thus jamb it against the
side of the window frame.
It is obvious that the sash frame can be easily raised and lowered, and that the
lateral thrust on the block, or blocks will support the sash frame in any position
in which it may be placed.
Dated thi
T.1 1000
CASTLE SMITH,
Invention" Office, 54, Fleet Street, London, E.C.,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Means for Automatically Supporting Railway
Carriage Door and other Sliding Window Sashes.
I, EBENEZER WARING of 102 Shirland Lane, Attercliffe, Sheffield, in the
County of York, Engineer, 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 invention is to provide simple and efficient means for
automatically supporting railway carriage door and other sliding window sashes.
According to this invention I attach a casing to the side, or one on each side of
the sash, and countersunk therein. The interior of this casing is formed of a wavy
or undulating shape. A flat steel spring is so fixed within this casing that it
partakes of the undulating shape of the interior and is therefore always under
tension. A block reversely corresponding to the undulations of the interior of the
casing is placed on this spring, and is of such a shape as to lie flush with the side
of the sash to which it is fitted.
The tension of the spring however being compressed between the two undulating
surfaces, will tend to push the block laterally away from the sash and against the
frame and will thus jamb it against the side of the window frame.
It is obvious that the sash can be easily raised and lowered and that the lateral
thrust on the block or blocks will support the sash in any position in which it
may be placed.
And in order that my invention may be more fully understood and carried into

page_text: practice I will now proceed to describe the same with reference to the accom-
panying drawings in which similar letters are used to indicate corresponding parts
throughout.
Figure 1 is a side elevation and Figure 2 a plan of the box or casing which is
secured to the side of the sash ;
Figure 3 is a section on the line A A Figure 2, and Figure 4 is a section on BB
Figure 2.
Figures 5 and 6 are respectively side elevation and under plan of the loose
block;
Figure 7 shews a part elevation of a window frame with a sliding sash to which
my invention is applied.
The curvatures or undulations C C in both the box or casing E and the block F
are made to correspond so that the block will conform to the wavy or undulating
shape of the interior of the box or casing or approximately so.
In fitting my
invention to an ordinary sliding window sash I first make a suitable recess to take
the box or casing E which is then countersunk therein and secured by means of
screws through the screw holes D or by other equivalent means. I then take a
flat steel spring S about the length of the interior of the box or casing E and of a
thickness according to the weight of the sash to which the invention is being
applied. This spring is laid within the box or casing E and the block F is then
loosely laid thereon, the sash is then placed in the window frame and the fitting is
now complete. If it is desired suitable stops may be provided to prevent the
block F from being pushed entirely out of the box or casing E by the spring S.
A convenient means for effecting this would be a rivet or rivets G secured to the
sides of the box or casing E and passing through slotted holes or apertures in the
block F. In Figure 5 the block is shewn with apertures H at each end and these
will answer well to take the place of the slotted holes. The slotted holes or
apertures H will allow ample lateral play to the block F but will prevent it from
being thrust entirely out of the box or casing E.
The spring S being bent or curved by the pressure of the curved or undulating
surfaces will by its pressure re-act on the block F and jamb the same tightly
against the window frame J thus acting as a friction clutch and supporting the
sash in any position in which it may be placed. I prefer to use two of these
friction clutches one on each side of the window sash, but one or any other
number may be used as found suitable to the weight of the sash and the power
required to maintain it in any given position.
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 :-
A friction clutch for automatically supporting a sliding window sash in any
position in which it may be placed, consisting of a box or casing E countersunk in
the sash and of an undulating or curved shape inside, a correspondingly curved
loose block F and a flat metal spring S interposed between the curved surfaces
of the box or casing E and block F substantially as and for the purpose
hereinbefore set forth and illustrated in the accompanying drawings.
Dated this 1st day of April 1801
66
CASTLE SMITH,
Invention" Office, 54, Fleet Street, London, E.C.,
Agent for the Applicant.