Improvements in Apparatus for Raising, Lowering, and Locking Window Frames.
Year: 1889

page_text: Date of Application, 30th Jan., 1889
Complete Specification Left, 30th Oct., 1889-Accepted, 30th Nov.,
1889
.
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Raising, Lowering, and Locking
Window Frames.
I, WALKER CRICHTON, of S Balgay Avenue, Dundee, in the County of Forfar,
Commercial traveller, do hereby declare the nature of this invention to be as
follows
The object of my invention, is to apply improved apparatus, in an improved manner,
to the raising, lowering, and locking of windows.
In carrying out my invention, according to one modification, as applied to windows
made in two parts, the upper frame of which slides in a separate groove to that of the
lower, I fasten my improved apparatus to the upper part of the lower frame, in any
suitable position.
My said apparatus consists of a frame carrying two pulleys, said frame being hinged
to the window frame, so that it can move in a plane at right angles to the window.
Between the two pulleys are two cords, the one fastened to the top and the other to
the bottom of the upper window frame. On the upper window frame is a notched
bar, in which a catch on the hinged frame engages, when the window is locked, and
fashioned in such a manner, that said window cannot be opened from the outside.
The hinge of the pulley frame is placed in such a position, that the catch always
tends to fall towards the notches on the upper window frame, when the lower cord
is pulled.
:-
The method by which I operate my improved apparatus is as follows:-
Should the window be closed, I pull the cord fastened to the upper portion of
the upper frame, and draw the hinged frame, carrying the pulleys, away from the
window; and thus take the catch away from the notch, thus unlocking the window.
By still pulling this cord I draw down the upper window frame, as far as may
be desired. Should I wish to raise the upper window frame, I pull the cord
attached to the lower part of the upper window frame, said cord passing over the
top of the lower pulley, and by so doing throw forward the hinged frame, until it
rests in its correct forward position and then pull up the window frame.
notched portion passes the catch on the hinged frame, it throws said catch back,
until it clears a tooth, after so doing falling forward again, and if desired the window
may be left there. Thus it may be left open to some extent and yet it cannot bo
pushed down from the outside.
As the
000
COMPLETE SPECIFICATION.
Improvements in Apparatus for Raising, Lowering, and Locking
Window Frames.
I, WALKER CRICHTON, of 8 Balgay Avenue, Dundee, in the County of Forfar,
Commercial Traveller, 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 my invention, is to apply improved apparatus, in an improved
manner, to the raising, lowering and locking of windows.
In carrying out my invention, according to one modification, as applied to windows
made in two parts, the upper frame of which slides in a separate groove to that of the

page_text: lower, I fasten my improved apparatus to the upper part of the lower frame, in any
suitable position.
One form of my invention, is represented on the accompanying sheet of explanatory
drawings.
Fig. 2.
Fig. 1. represents a. vertical section of the window, and also shows a side view
of my improved apparatus, the window frames being shut and locked.
represents a part section of the window with a side view of my improved apparatus,
the window-frames being unlocked, preparatory to the lowering of the upper frame.
Fig. 3. represents a front view of the window and my improved apparatus, and
corresponds to the view shown in Fig. 1. In these drawings the same reference
numerals, are used to mark the same or like parts wherever they are repeated.
My said apparatus consists of a frame 1. carrying two pulleys 2. and 3. said frame
being hinged to the window frame as shown at 4. so that it can move in a plane at
right angles to the window, the pin 5. determining the amount of movement.
Between the two pulleys 2. and 3. are two cords 6. and 7. the one 7. fastened to
the top at 8. and the other 6. to the bottom of the upper window frame at 9.
On the upper window frame is a notched bar 10. in which a catch 11. on the
hinged frame engages, when the window is locked, and fashioned in such a manner
that said window cannot be opened from the outside. The hinge 4. of the pulley
frame 1. is placed in such a position, that the catch always tends to fall towards
the notches on the upper window frame when the lower cord 6. is pulled.
The method by which I operate my improved apparatus is as follows:-
Should the window be closed, I pull the cord 7. fastened to the upper portion S. of
the upper frame, and draw the hinged frame 1. carrying the pulleys 2. and 3. away
from the window, and thus take the catch 11. away from the notch, thus unlocking
the window. By still pulling this cord I draw down the upper window frame, as
far as may be desired.
As the
Should I wish to raise the upper window frame, I pull the cord 6. attached to
the lower part of the upper window frame at 9. said cord passing over the top of
the lower pulley 2. and by so doing throw forward the hinged frame 1. until it
rests in its correct forward position, and then pull up the window frame.
notched portion 10. passes the catch 11. on the hinged frame 1. it throws said catch
back, until it clears a tooth, after so doing falling forward again, and if desired
the window may be left there. Thus it may be left open to some extent and yet
it cannot be pushed down from the outside.
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
(1) The arranging or combining together of the parts, substantially in the improved
manner hereinbefore described.
(2) The placing of the hinge 4. in such a position that the frame 1. always tends to
fall forward as hereinbefore described.
(3) The hereinbefore described combination of parts, in which the cord 6. tends to
throw forward the frame 1. operating substantially as described.
(4) The hereinbefore described combination of parts, in which the cord 7. tends to
throw back the frame 1. operating substantially as described.
(5) The use of the check pin 5. as hereinbefore described.
Dated this 24th day of October 1990
GEO. C. DOUGLAS & Co.,
41, Reform Street, Dundee, Applicant's Agent.