Improvements in Means for Preventing the Steaming of Windows.
Year: 1897

page_text: Date of Application, 21st May, 1897
Complete Specification Left, 21st Mar., 1898-Accepted, 23rd Apr., 1898
PROVISIONAL SPECIFICATION.
Improvements in Means for Preventing the Steaming of Windows.
We, THOMAS WILLIAM LENCH, of Tregaron, Hagley, Worcestershire, Manu-
facturer, and EDWARD HERBERT MAULE, of 199, Coventry Road, Small Heath,
Birmingham, Professional Brewer, do hereby declare the nature of this invention
to be as follows:-
-
This invention relates to improvements in means for preventing the steaming
of shop and the like windows.
As is well known the cause of such steaming is owing to the difference of
temperature between the inside and outside of such windows, and the object
of this our invention is to equalize the said temperatures, and in effecting the
same we proceed somewhat as follows:-
We provide a blower or fan, or other source of cold air under pressure which
may be placed in any convenient position, but preferably beneath the window,
and from such blower &c. carry a pipe or pipes, which said pipes may be placed
in any desirable position around or upon the window, but preferably along or
near the bottom of the glass. In these pipes we now make outlet holes in such
a manner that the outflow shall obliquely impinge upon the window, and they
may be further arranged so that one or more series of holes may direct the air
at a different altitude to the other series.
The motor mechanism for driving the fan or air pressure may be of any suit-
able character, but preferably we should combine with the air pipes as before
named, a train of wheelwork actuated by spring power so that from time to time
it may be wound up, and the air pressure device set in motion.
At the point where the cold air is drawn into the fan or other air pressure
device, we provide that such air shall be drawn through a filtering body of cotton
wool or its equivalent, so that all dust and other foreign impurities may be there
arrested and the contrivance is here further so made as to permit of the removal
from time to time of any such accumulations, and of renewal of such filtering
substance.
By these means the air near the glass upon the interior is always kept cool,
so that no condensation of warm interior air can take place as a result of the cold
exterior air.
100x
CHARLES T. POWELL,
Applicants' Agent.

page_text: Improvements in Means for Preventing the Steaming of Windows.
We, THOMAS WILLIAM LENCH, of Tregaron, Hagley, Worcestershire, Manu-
facturer, and EDWARD HERBERT MAULE, of 199, Coventry Road, Small Heath,
Birmingham, Professional Brewer, 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:
-
This invention relates to improvements in means for preventing the steaming
of shop and the like windows.
As is well known the cause of such steaming is owing to the difference of
temperature between the air inside and outside of such windows, and the object
of this our invention is to equalize the said temperature on the two sides of the
glass, and in effecting the same we proceed somewhat as follows:-
We provide a blower or fan, or other source of cold air under pressure which
may be placed in any convenient position, but preferably beneath the window,
and from such blower &c. carry a pipe or pipes, which said pipes may be placed
in any desirable position around or upon the window, but preferably along or
near the bottom of the glass. In these pipes we now make outlet holes in such
a manner that the outflow shall obliquely impinge upon the window, and if
desired they may be further arranged so that one or more series of holes may
direct the air at a different altitude to the other series.
In order to more clearly explain this our invention we have appended hereunto
an illustrative drawing upon which are figures and numbers of reference, similar
numbers referring throughout the several views to the same thing or part, and
in which:-
Fig. 1, is a front view, and Fig. 2, a side sectional elevation of this our invention
as applied to a shop window.
Fig. 3, is a front view, and Fig. 4, a side sectional view showing modifications
in the means of carrying out our invention.
10, represents the glass window. 11, is the cold air main down which cold
dry air is forced by any suitable mechanical means. 12, 12, are outlet tubes
from the main 11, whose nozzle ends 13, are so directed that the stream or wall of
cold air shall rise parallel to the plane of the window, or alternatively arranged
to lean slightly towards the window, so that the air may impinge thereon at a
very obtuse angle. In these tubes 12, are placed taps or valves 14, by which the
amount of discharge through each tube may be regulated.
Referring now more particularly to Figs. 3 and 4:-Here the main 11, is shown
somewhat smaller as it is intended to carry the air at a higher pressure, than in
the arrangement shown in Figs. 1 and 2. The nozzles of the outlet tubes in this
case are directed into the entrance of supplemental tubes 12", which latter are
placed so as to direct the current of air upon or against the window, in the
manner described under Figs. 1 and 2. This causes the surrounding air to rush
into the tubes 12ª, and mix with the jet of cold high pressure air from the
main 11. The apparatus in fact acts as an injector and delivers a strong current
of comparatively cold air upon the window. Here again taps or valves 14, are
used to control the supply of the air under pressure. The tubes 12 and 12"
throughout may be of any suitable cross sectional shape, such as circular, flat,
or oval.
The surrounding air that is sucked into the tubes 12*, may be cold air drawn
through a ventilator from the outer air; or it may be even the warmer air of the
shop. In this latter case its temperature would be much reduced by its mixture

page_text: with the colder jet of air from the main, which latter is somewhat lowered by
the expansion it takes upon issue from the main, and hence the air delivered upon
the window would be sufficiently cold without infusing into the shop such a large
volume of cold air as by the arrangement shown in Figs. 1 and 2.
In either case a suitable ventilator may be fixed at or near the top of the
window.
In some cases the apparatus may be fixed at the top of the window instead of
at the bottom, in which case, advantage is taken of the tendency of cold air to
descend.
The motor mechanism for producing the air pressure is not shown as this in
itself forms no part of our invention, but for small windows or the like a train
of wheel work actuated by springs or weights may answer very well, but for
larger requirements, a hot air engine, electro motor or gas engine is preferable.
At the point where the cold air is drawn into the fan or other air pressure
device, we provide that such air shall be drawn through a filtering body of cotton
wool or its equivalent, so that all dust and other foreign impurities may be there
arrested, and the contrivance is here further so made as to permit of the removal
from time to time of any such accumulations, and of renewal of such filtering
substance.
By these means the air near the glass upon the interior is always kept cool,
so that no condensation of moisture from the warm interior air can take place as
a result of the cold exterior air.
Having now particularly described and ascertained the nature of this our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:--
1. In apparatus for preventing the steaming of windows, the employment and
application of a current or currents of cold air under pressure, by means sub-
stantially such as those herein described and shown.
2. In apparatus for preventing the steaming of windows the combination and
arrangement of the means for supplying cold air under pressure, the main 11,
and outlet tubes 12, with their controlling valves 14, substantially as set forth
and shown in reference to Figs. 1 and 2.
3. In apparatus for preventing the steaming of windows, the modified combi-
nation and arrangement with the means for supplying cold air under pressure
by main 11, having controllable outlet nozzle tubes 12, of the supplementary
tubes 12ª, substantially as set forth and shown in reference to Figs. 3 and 4.
Dated this 19th day of March 1898.
CHARLES T. POWELL,
Applicants' Agent,
12, Cherry Street, Birmingham.