Improvements in Adjustable Sliding Sashes.
Year: 1894

page_text: Date of Application, 15th June, 1894
Complete Specification Left, 12th Mar., 1895-Accepted, 13th Apr., 1895
PROVISIONAL SPECIFICATION.
[Communicated from abroad by EDWIN LONG, Carriage and Waggon Foreman,
of the North Western Railway of India, Karachi, in the Province of Sind, in
the Empire of India.]
Improvements in Adjustable Sliding Sashes.
I, HENRY HARINGTON LEIGH, Assoc. M. Inst. C.E., Fel. Ch. Inst. P.A.,
F.1. Inst., practising as Phillips and Leigh at No. 22 Southampton Buildings,
Chancery Lane, in the Administrative County of London, Engineer and Patent
Agent, do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in the sashes of railway and other carriage
doors and the object of it is to prevent the sashes rattling in their frames, to
provide for their being held automatically at any height in their grooves and to
prevent them jumping or being jarred when they are pushed down into the pocket
in the door.
In carrying the invention into effect I fix an arc shaped spring on one or both
side edges of the frame of the sash. Each spring is narrower than the groove in
which the sash slides. It is about half as long as the sash and when fixed to the
edge of the latter, it stands out from it into the groove against the bottom face of
which it bites with sufficient force to hold the sash stationary. I prefer that the
ends of the spring shall be in contact with the edge of the sash, and the middle or
convex portion of it with the groove.
The spring is made fast preferably to the sash, by one of its ends, the opposite
end being connected to the sash by means of a slot and stud device or the equivalent
thereof, the object of such device being to allow of the spring straightening itself
out a little and also to keep it aligned with the sash. The convexity of the spring
being the central and projecting portion of it, is the part which bites against the
groove, and for the purpose of reducing friction between the two, I mount an
antifriction roller in or on the said convexity.
The spring device above mentioned may be fixed upon either face of the sash,
engaging then with one side of the groove, but I prefer to fix it on the edge.
The jumping and jarring above referred to are prevented by fixing a spring
similar to those described above, or of any other form possessed of equivalent
resilience, either to the bottom edge of the sash or upon the bottom of the pocket.
The devices described above are applicable to either glazed or Venetian sashes.
Dated this 15th day of June 1894.
Improvements in Adjustable Sliding Sasnes.
I, HENRY HARINGTON LEIGH, Assoc. M. Inst. C.E., Fel. Ch. Inst. P.A.,
F.I. Inst., practising as Phillips and Leigh at No. 22 Southampton Buildings,
Chancery Lane, in the Administrative County of London, Engineer and Patent
Agent, do hereby declare the nature of this invention and in what manner

page_text: .
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to be performed, to be particularly described and ascertained in and
by the following statement:-
My invention relates to improvements in the sashes of railway and other carriage
doors and the object of it is to prevent the sashes rattling in their frames, to
provide for their being held automatically at any height in their grooves and to
prevent them jumping or being jarred when they are pushed down into the pocket
in the door.
In carrying the invention into effect I fix an arc shaped spring on one or both
side edges of the frame of the sash. Each spring is narrower than the groove in
which the sash slides. It is about half as long as the sash and when fixed to the
edge of the latter, it stands out from it into the groove against the bottom face of
which it bites with sufficient force to hold the sash stationary. I prefer that the
ends of the spring shall be in contact with the edge of the sash, and the middle or
convex portion of it with the groove.
The spring is made fast preferably to the sash by one of its ends, the opposite
end being connected to the sash by means of a slot and stud device or the equivalent
thereof, the object of such device being to allow of the spring straightening itself
out a little and also to keep it aligned with the sash. The convexity of the spring
being the central and projecting portion of it, is the part which bites against the
groove, and for the purpose of reducing friction between the two, I mount an
antifriction roller in or on the said convexity.
The spring device above mentioned may be fixed upon either face of the sash,
engaging then with one side of the groove, but I prefer to fix it on the edge.
The jumping and jarring above referred to are prevented by fixing a spring
similar to those described above, or of any other form possessed of equivalent
resilience, either to the bottom edge of the sash or upon the bottom of the pocket.
The devices described above are applicable to either glazed or Venetian sashes.
Referring to the accompanying figures which are to be taken as part of this
Specification and read therewith :-
Figure 1 is a part sectional elevation of a railway carriage door, the sash of
which is fitted with my invention.
Figure 2 is a vertical section taken along the line 2-2 of Figure 1.
Figure 3 is an elevation of a sash fitted with a single side spring.
Figure 4 is an elevation on a larger scale of a side spring.
Figure 5 is a side view of the same spring.
Figure 6 is a plan of the bottom or cushioning spring.
a is the door and a', a', the grooves in which slides the sash b. c is the ordinary
pocket in the lower part of the door. So far, the parts mentioned are of the
ordinary construction and are introduced only to illustrate the application of the
invention.
dis an arc shaped spring. One of these may be fixed to each side of the sash.
The figures shew the use of only one. A spring is fixed to the sash and in the
plane of it, with its centre or convexity projecting from the sash side, by means of
screws, d', or equivalent devices, one of which is passed through a slot d in the end
of the spring into the sash frame. The lengths of the slots are adjusted to provide
for the elongation of the spring which will be caused by the insertion of the sash
in the grooves, for the convexity of the spring to the sash frame is always enough
to provide for the projecting or central portion of the spring (or an attachment to
it hereinafter described) bearing hard enough against the opposite face of the
groove a¹ to counteract gravity. The present invention does not limit me to the
exact details of the screw and slot device illustrated, but includes any equivalent
The spring is narrower than the groove a' so that there shall not be any friction or
wear between its edges and the sides of the groove.. e is an antifriction roller
pivotted in a slot e¹ in the central portion of the spring on a pine parallel with the
flat of the spring. This pin is shewn as carried by two cheeks e,e formed on the
spring for that purpose. A segment of this antifriction roller presents itself
outside the central portion or convexity of the spring and is consequently, instead

page_text: of that convexity, always in contact with the above mentioned opposite face of the
groove a'. A suitable recess fis formed in the sash frame to receive the spring and
to make room for the compression and elongation of it.
It is to be understood that my invention includes reversing the spring, making it
fast to the sash frame by its central portion and fitting each end with an antifriction
roller e. The slots would then be dispensed with.
fis an arc shaped spring held by means of screws f¹ passed through longitudinal
slots in the ends of the spring into the pocket bottom, thereby holding the arc of
the spring immediately under the centre of the sash. The object of this spring is
to serve as a cushion to prevent jumping and jarring of the sash when it is down in
the pocket. Provided that it is capable of doing this, the shape of the spring may
be varied to any extent. It may also be fixed either on the bottom of the sash or
on the bottom of the sash pocket.
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
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1. The combination of sash, sash groove and side spring, as set forth.
2. The combination of sash, sash groove and a side spring on each side of the
sash, as set forth.
3. The combination of sash, sash groove, side spring or springs and cushioning
spring as set forth.
Dated this 12th day of March 1895.
HENRY H. LEIGH,
Chartered Patent Agent.