Year: 1887

page_text: Date of Application, 10th Feb., 1887
Complete Left, 10th Nov., 1887
Complete Accepted, 13th Dec., 1887
We, ALEXANDER WALKER and DUNCAN BELL, both of the firm of Dickson
Walker & Co. 31 South Frederick Street, Edinburgh, Glass Merchants, do hereby
declare the nature of this invention to be as follows:-
Our invention relates to apparatus for raising and lowering window sashes and
securing them both when closed and partially opened against attempts to open them
from without while permitting of swinging inwards of the sashes for convenience in
cleaning the windows.
In carrying out our invention the window sashes are fitted in frames in the usual
way the use of parting beads being in general dispensed with and the inside "battens"
being hinged vertically and secured by spring catches which on being disengaged
permit of the battens being turned and of the window sashes being swung out upon
hinges by which they are secured at one side to guide blocks fitted to slide in vertical
slots or grooves in the frames. One slide block is provided for each sash and on each
is fixed a screw nut through which passes a vertical screw spindle the rotation of
which imparts the upward or downward sliding movement of the slide block and the
raising or lowering of the window sash. One screw spindle is placed behind the
other at the side of its corresponding sash and the rear spindle is carried lower than
the front one to provide for the operating of each from horizontal spindles from which
they are driven by worms gearing into worm wheels on the vertical spindle the
horizontal spindles being carried forward at the back of the woodwork of the window
and being provided with squares on their ends to which crank handles are applied for
operating the apparatus.

page_text: In lieu of the screw spindles passing through nuts in the sliding blocks screw racks
may be attached to said blocks and operated by screw pinions direct from the
horizontal spindle, or plain toothed racks operated by pinions may be employed in
which latter case ratchets and pawls or similar devices may be applied in connection
with the horizontal spindles to retain the window sashes in position when raised or
lowered.
Total : 11
גז
Improvements in Apparatus for Raising and Lowering and
Securing Window Sashes.
We, ALEXANDER WALKER and DUNCAN BELL both of the firm of Dickson
Walker & Co. 31 South Frederick Street Edinburgh, Glass Merchants 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:-
Our Invention relates to apparatus for raising and lowering window sashes and
securing them both when closed and partially opened against attempts to open them
from without while permitting of swinging inwards of the sashes for convenience in
cleaning the windows.
In the accompanying drawings which illustrate our invention figure 1 is an interior
view of a window showing the hinging of the sashes, figure 2 is an elevation at the
back of the sash case, showing the devices for raising and lowering the sashes
and figures 3 and 4 are horizontal sections through the upper and lower sashes
respectively.
In carrying out our invention the window sashes A, A', are fitted in frames or
cases B, in the usual way the inside "batten" Cat one side being secured by catches c
which on being disengaged permit of the batten being removed and of the window
sashes A, A' being swung out upon hinges a, a, by which they are secured at one
side to guide blocks or bars D, D, fitted to slide in vertical slots or grooves d, d, in
the frames B. One slide block D is provided for each sash or as is shown the upright
stile of the window sash is divided vertically so that one portion forms part of the
window sash and the other part the slide bar or block and on each such slide bar D is

page_text: fixed a screw nut E, extending through the slot d. Through cach nut E, passes a
vertical screw spindle F, the rotation of which imparts the upward or downward
sliding movement of the slide block and effects the raising or lowering of the window
sash. One of the screw spindles F, is placed behind the other at the side of its
corresponding sash and the rear spindle is carried lower than the front one to provide
for the operating of each from horizontal spindles G, from which they are driven by
worms H, gearing into worm wheels I, on the vertical spindle F the horizontal
spindles G, being carried forward at the back of the shutter J or woodwork of the
window and being provided with squares on their ends to which crank handles are
applied for operating the apparatus.
In lieu of the screw spindles F, passing through the nuts E in the sliding blocks
or bars D, screw racks may be attached to said blocks or bars and operated by screw
pinions direct from the horizontal spindles G, or plain toothed racks operated by
pinions may be employed in which latter case ratchets and pawls or similar devices
may be applied in connection with the horizontal spindles G to retain the window
sashes in position when raised or lowered.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is―
1. The arrangement and combination of parts constituting the improved apparatus
for raising, lowering, and securing window sashes, substantially as hereinbefore
described.
2. The combination with a window sash of a block or bar (D) hinged thereto and
fitted to slide vertically whereby the sash may be raised and lowered or swung open
substantially as hereinbefore described.
L
AT 13 1
T
1
1000
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow,
Agents.