AN IMPROVEMENT IN THE CONSTRUCTION OF WINDOWS
Year: 1877

page_text: LETTERS PATENT to Samuel Gibbs, of No. 3, Parkside Villas, Edmonton, in the
County of Middlesex, Gentleman, for the Invention of "AN IMPROVEMENT IN
THE CONSTRUCTION OF WINDOWS."
PROVISIONAL SPECIFICATION left by the said Samuel Gibbs at the Office
of the Commissioners of Patents on the 5th February 1877.
SAMUEL GIBBS, of No. 3, Parkside Villas, Edmonton, in the County of Mid-
dlesex, Gentleman. "AN IMPROVEMENT IN THE CONSTRUCTION OF WINDOWS."
My Invention is designed to avoid the inconvenience experienced in moving the
top sash of ordinary windows, which arises from its sliding down outside the bottom
sash, and being therefore not easily actuated by a person standing in the room.
In my improved construction the two sashes, which are hung with the usual
sash lines and weights, are brought into the same vertical plane when closed, and
the top sash when lowered is caused to slide down inside the bottom sash. Both
sashes are then readily moved up or down by suitable handles or sash lifts
attached to the bottom rails thereof. The bottom sash works in a groove formed
in the thickness of the pulley style, close to the outside bead of the fixed frame, and
has a vertical motion only. The top sash fits between the faces of the pulley styles,
and slides vertically between the inner face of the bottom sash and the inside bead
of the sash frame. When raised to its closed position the top rail of this sash
impinges on sloping guide blocks fixed to the pulley styles, and is forced against
the outside beads of the sash frame. The lower rail is then pressed outwards by
the person closing the window, and fits on the top rail of the bottom sash. These
meeting rails are then secured together by a suitable fastening, and are of such
sections and so fitted to each other as to form a water-tight joint.
A portion of the side of the grooves in the edges of the top sash in which its
hanging cords are fixed is cut away so as to allow for the lateral motion of the top
sash;
the hanging cords then lying in a sloping direction from their point of attach-
ment on the sash to their respective pullies.
'

page_text: Having now described the nature of my Invention, and the manner in which the
same is to be performed, I wish it to be understood that I do not limit myself to the
precise details herein described, as the same may be varied without departing from
the nature of my Invention, but I claim as my Invention, the improvement in the
construction of windows by which the top sash is made to slide down inside the
bottom sash, substantially as described.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Samuel Gibbs in the Great Seal Patent Office on the 3rd August
1877.
SAMUEL GIBBS, of Nomber 3, Parkside Villas, Edmonton, in the County of Mid-
dlesex, Gentleman. "AN IMPROVEMENT IN THE CONSTRUCTION OF WINDOWS."
My Invention is designed to avoid the inconvenience experienced in moving
the top sash of ordinary windows, which arises from it sliding down outside the
bottom sash, and being therefore not easily actuated by a person standing in the
room.
In my improved construction the two sashes, which are hung with the usual sash
lines and weights, are brought into the same vertical plane when closed, and the top
sash when lowered is caused to slide down inside the bottom sash.
Both sashes are
then readily moved up or down by suitable handles or sash liſts attached to the
bottom rails thereof. The bottom sash works in a groove formed in the thickness of the
pulley styles, close to the outside bead of the fixed frame, and has a vertical motion
only. The top sash fits between the faces of the pulley styles, and slides vertically
between the inner face of the bottom sash and the inside bead of the sash frame.
When raised to its closed position the top rail of this sash impinges on sloping guide
blocks fixed to the pulley styles, and is forced against the outside beads of the sash
frame. The lower rail is then pressed outwards by the person closing the window,
and fits on the top rail of the bottom sash. These meeting rails are then secured
together by a suitable fastening, and are of such sections and so fitted to each other
as to form a water-tight joint.
Having explained the nature of my Invention I will proceed more particularly to
set forth the system, mode, or manner in or under which the same may be practically
carried into effect, reference being had to the annexed Sheet of Drawings and to
the letters and figures marked thereon, in which,—
Figure 1 is an elevation, partly in section, of a window or sash frame and sashes
constructed in accordance with my Invention.
Figure 2 is a vertical section, shewing the sashes closed.
Figures 3 and 4 are horizontal sections of the sashes and frame taken on the
lines" a, a," and "b, b," respectively, marked on Figures 1 and 2.
The top sash A, and the bottom sash B (hung with the usual sash lines C and
weights D working over the sash pullies E) are shown in the position they occupy
when closed. The bottom sash B works in a groove formed in the thickness of the
pulley styles F (as shewn in Figure 4) close to the outside bead of the sash frame
G. The top sash A fits between the faces of the pulley styles F, and slides down
vertically between the inner face of the bottom sash B and the inside beads of the
sash frame G. When raised to its "closed" position the top rail H of the sash A
impinges on sloping guide blocks I fixed to the pulley styles F, and is then forced
against the outside bead of the sash frame G. The lower rail K is then pressed
outwards, and fits on or over the top rail L of the lower sash B, these meeting rails
K. and L being then secured together by a suitable fastening, one description of
which is shown marked M.
A portion of the side of the grooves in the edges or side rails of the top sash A
(in which its hanging cords C are fixed to it) is cut away to allow for the lateral

page_text: motion of the top sash A when being closed, the hanging cords C then lying in a
sloping direction from their points of attachment on the sash A to the sash pullies E,
as more particularly shewn in Figure 2.
A part G of the sash fraine G is made removeable to allow of the removal of the
sashes A and B, and also to give access to the weights D by means of the openings
pocket holes" N, as is shewn more particularly in Figure 4.
or
Having now described the nature of my Invention, and the manner in which the
same is to be performed, I wish it to be understood that I do not limit myself to
the precise details herein described and illustrated, as the same may be varied
without departing from the nature of my Invention, but I claim as my Invention,
the improved construction of sash frames and sashes, whereby the top sash is made
to slide down inside the bottom sash (instead of outside, as in the ordinary con-
struction), substantially as herein-before described and illustrated in the accompanying
Drawings.
In witness whereof, I, the said Samuel Gibbs, have hereunto set my hand
and seal, this Second day of August, in the year of our Lord One thousand
eight hundred and seventy-seven,
Witness,
FREDERIC H. ROBERTS,
10, Adam St.,
Adelphi,
W.C.
SAMUEL GIBBS. (L.S.)