Improved Means for Maintaining Equalization of Temperature in Green and other Houses by an Automatic Regulation of Draught Valve of Heater.
Year: 1891

page_text: Date of Application, 3 th Dec., 1891
Complete Specification Left, 30th May, 1892-Accepted, 16th July. 1892
PROVISIONAL SPECIFICATION.
Improved Means for Maintaining Equalization of Temperature in
Green and other Houses by an Automatic Regulation of Draught
Valve of Heater.
I, CHARLES THOMAS EVANS LASCELLES, of Bellgrove Villa, Welling, Kent,
Engineer, do hereby declare the nature of this invention to be as follows
This invention has for object, automatically regulating the opening and the closing
of a damper or valve employed with air inlet draught or outlet for passage of the
products of combustion in connection with heating apparatus, such as those used
with greenhouses and the like.
For the purpose of my invention, I attach the damper or valve by levers, or
other appliances to a float or buoyant body in a water cistern, so that as the
temperature of the water is raised by heat, or reduced in any way, the rise or fall
of the float regulates the opening of the air inlet valve or damper, or of the outlet
according to its position.
Dated this 30th day of December 1891.
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Charles Thomas Evans Lascelles..
COMPLETE SPECIFICATION.
Improved Means for Maintaining Equalization of Temperature in
Green and other Houses by an Automatic Regulation of Draught
Valve of Heater.
I, CHARLES THOMAS EVANS LASCELLES, of Bellgrove Villa, Welling, Kent,
Engineer, 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 has for object, automatically regulating the opening and the closing
of a damper or valve employed with air inlet draught or outlet for passage of the
products of combustion in connection with heating apparatus such as those used
with greenhouses and the like.
For the purpose of my invention, I attach the damper or valve by levers or
other appliances to a float or buoyant body in a water cistern, connected to the
circulating pipes of the greenhouse, so that as the temperature of the water in the
pipes is raised by heat, or reduced in any way, the rise or fall of the float regulates
the opening of the air inlet valve or damper, or of the outlet according to its
position.
My invention will be clearly understood by the annexed drawings.
Figure 1 represents a greenhouse stove A as an example, with water cistern B
close thereto, and in connection by a pipe J with the circulating pipes K, so that
a balanced lever C can be operated by the float D for regulating the valve or
damper E in the throat of the uptake F, said lever being pivoted on a bracket G
affixed to the cistern B. The handle H of the damper is connected by a link or
rod I.
Figure 2 shows a similar stove and float in cistern, the damper and the float
being in connection with a shaft like rod held by brackets G, G, and said rod can
be of any length to suit the position of the cistern from the stove depending on

page_text: the lengths of water pipes used and in accordance with the size of the greenhouse,.
or other structure in which the apparatus is fitted.
I have represented the apparatus in relation with a damper in the flue pipe in
connection with a stove but it may be in connection with the air supply valve, or
with a flue of a brick furnace, or other heating arrangement.
In fitting the apparatus I purpose setting the float in connection with the position
of the damper or valve, with the water at a given temperature say 150 Fah.: then
should the water become hotter from increase of draught, the float would rise
by expansion of the water and partially close the valve to check the draught
through the fire.
Again should the temperature of the water become reduced it would cause a
greater contraction and lowering of the float, and the valve be opened to a
greater extent until the fire burns up again to put the float and valve in
equilibrium.
By this invention, the temperature of a greenhouse can be maintained at a more
equable temperature from the stove alone and without requiring attendance,
for the opening, or closing of damper, ventilators, top or bottom lights as at
present.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The means and apparatus substantially as shown in the annexed drawings
for maintaining equalization of temperature as and for the purpose set forth.
2. The connection of a float in a water cistern with a dumper or valve of the
heating apparatus, substantially as described, as a means for sustaining. a given
degree of heat in a greenhouse, or like structure.
The Dom uay or VINY
H. GARDNER.
Patent Agent, 166, Fleet Street, London,
Agent for the said Charles Thomas Evans Lascelles.