Improvements in and connected with Windows.
Year: 1890

page_text: Date of Application, 30th July, 1890
Complete Specification Left 6th Dec. 1890-Accented 31st Jac. 1891
PROVISIONAL SPECIFICATION.
Improvements in and connected with Windows.
ABRAHAM FITTON and JOHN WILLIAM FITTON commonly designated as
A. Fitton & Son of 3 Robin Hood Street, Cheetham Hill Manchester Joiners &
Builders. We do hereby declare the nature of this invention to be as follows:-
The moovements consist of a cogd. iron strip fitted and screwed on the edge of each
sash. The same being worked by 4 cog wheels thus causing the weight of one sash
to be the support of the other in any possition they are placed as will be observed
they work simultaneously as one sash is drawn down the other goes up the wheel
box being fixed in the centre of the frame-its advantages are its durability
cheapnes and ease especialy of working the top sash and no cords breaking or
windows falling-also freedom from accident by sitting outside to clean them same
having to be done from inside by manipulating and mooving the sashes to any desired
possition necesary.
Dated this 29th day of July 1800
ABRAHAM FITTON.
JOHN WILLIAM FITTON.
COMPLETE SPECIFICATION.
Improvements in and connected with Windows.
ABRAHAM FITTON & JOHN WILLIAM FITTON of 3 Robin Hood Street
Cheetham Hill Manchester in the County of Lancashire Joiners & Builders 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:-
In the accompanying drawing
Fig. 1 shews a complete elevation of window sashes in position with our improved
aperatus attached.
Fig. 2 shews an enlarged sectional elevation of same.
Fig. 3 a side view looking towards the sash.
A is a toothed rack firmly fixed to the lower sash D of an ordinary window. A
similar rack not shewn is attached to the upper sash D'. The spur wheels B BI B
whose axles revolve in bearings C in the side of the wheel box are arranged as
follows. The wheel B gears with the rack of lower sash and also with the smaller
wheel B which is rigidly attached to or preferably cast with the wheel B2 which
gears with the rack, attached to the upper sash. The wheel box C is firmly fixed
and let into the inside of the window frame E adjacent to the centre or joint where
the two sashes meet.
In our invention the racks extend the full lenth of each sash-it will be understood
that a wheel box as described is fixed on each side of the window but of opposite
hands--it is also obvious that when motion is imparted to the rack A the wheels B
will cause revolution of B1 and B2 at a speed greater in proportion to the difference
in the number of teeth of B and B and hence the rack of the upper sash will be
moved in the oposite direction to the lower one and with a speed greater in the

page_text: ratio described-
-our main object having been to proportion the speeds so that the
bottom sash in an ordinary window will travel about 8 or 9 in. less distance than
the top sash. Thus top ventilation is easily secured which is an immense advantage.
The pin with knob d can be inserted with the sashes in any position thus locking
the teeth and windows as shewn in the accompanying drawings thus the window will
be perfectly safe left open at night say 4 in: for ventilation purposes.
Having now particularly described ascertained the nature of our invention
and in what manner the same is to be performed we declare that we wish it
to be understood that we are aware of the Specification of Thomas Baker Brown
No. 1294 A.D. 1887 and we lay no claim to anything described and claimed
therein likewise as to others we have discovered with cog wheels and racks
such as No. 1131 of 1883 or 398 of 1880 and several others of a similar nature but
what we claim is
.
I. The 2 spur wheels fixed at each side of a window both of which wheels gear
with racks fixed upon the moving sashies as hereinbefore described and illustrated
in the accompanying drawings having one small spur wheel geared to one of the
above wheels.
II. The top sash arranged to balance the bottom sash by means of gearing which
gives a an advantage in speed to the top sash substantially as illustrated in drawings.
III. The unequal spur and pinion wheels gearing together and so giving a
greater or diferential speed to the top sash.
IV. The locking pin inserted between the teeth of gearing wheels to fasten the
sashes in any position whether open or shut as hereinbefore described and
illustrated.
Dated this 3rd day of December 1890.
ABRAHAM FITTON.
JOHN WILLIAM FITTON.