Improvements in Steam Heating Apparatus for Greenhouses and other Buildings.
Year: 1892

page_text: Date of Application, 28th Nov., 1892
Complete Specification Left. 25th Aug. 1893-Accepted. 14th Oct. 1893
PROVISIONAL SPECIFICATION.
Improvements in Steam Heating Apparatus for Greenhouses and
other Buildings.
MARK MACER Wheelwright Bellgrave House Enfield Highway Middlesex do
hereby declare the nature of this invention to be as follows:-
A steam apparatus for heating buildings and greenhouses, with high pressure
boilers to be regulated to any pressure by an automatic contrivance; the same
allowing all the cold water to escape, at the same time keeping all the hot water
and steam in by an automatic steam trap at the other end of the pipes.
The automatic machine for regulating the steam from the boiler to the pipes is a
cylinder with a piston and connecting rod, that opens and shuts a stop cock in the
supply pipe near the boiler.
The automatic steam trap is a spring bar with an india rubber pad on the end,
and when the condensed water is out the pipes expand, and press against the india
rubber pad, and stops all the steam in the pipes.
Dated this 28th day of November 1802
MARK MACER.
COMPLETE SPECIFICATION.
Improvements in Steam Heating Apparatus for Greenhouses and
other Buildings.
I, MARK MACER of Bellgrave House Enfield Highway in the County of
Middlesex Wheelwright 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 this invention is to construct a steam heating apparatus for green-
houses and other buildings in such a manner that the steam in the pipes shall be
automatically kept at any desired pressure and also to automatically eject the cold
water from the pipes which arises from the condensation of the steam therein while
retaining the hot water and the steam
And in order that my said invention may be fully understood I will proceed to
explain the same with reference to the accompanying sheet of drawings.
A is a high pressure steam boiler B the steam stop valve C the steam pipe D a
cock to the plug of which is attached a lever E.
The lever E is connected by the rod F to the piston rod G which moves steam
tight in the cylinder H to which is connected the steam pipe C.
The lever E has a screw thread formed thereon on which rotates the weight I as
soon as the pressure of steam in the cylinder H is sufficient to raise the piston and
overcome the weight I the lever E closes the cock D and cuts off the supply of
steam to the pipes. As soon as the pressure falls the piston descends and opens the
cock D allowing more steam to pass and so on the pressure of steam in the pipes
being regulated by moving the weight nearer to or further from the cock D. By
this means the pipes and radiators are kept full of steam at any required pressure
independent of the pressure in the boiler A.
K is a radiator composed of pipes or tubes connected to the wall or other
portion of the building L at one end as shewn the other end being left free to
expand.
The radiator K may be connected to the steam pipe at the bottom as shewn or at
the top by means of the bend M.

page_text: At the bottom of the free end of the radiator is bent round as shewn at N the
outlet being faced to make a water and steam tight joint with the pad P of rubber
cork or other material attached to the spring O which may be attached to the floor
or other convenient portion of the building. Q is a screw to adjust the distance
between the pad P and the outlet end of the pipe N R is a drain to carry off the
waste water.
The action of the apparatus is as follows:-
When the pipes are full of steam and quite hot the screw is turned till the
pad P closes the outlet orifice and prevents the escape of steam. The radiation of
heat from the pipes causes the steam to condense and drain to the outlet N the
pipes in the radiator being slightly inclined to facilitate the flow of condensed water
to the outlet as soon as the accumulated water cools the pipes in the radiator
contract and move away from the pad P the cold water then runs out and as soon as
the pipes contain only hot water and steam they expand again and close the outlet
orifice.
By this means no hot water or steam is wasted and the radiator is automatically
drained of cold water.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
I. In a steam heating apparatus the combination of a piston working in a cylinder
in communication with the steam pipe with a cock opened or closed by means of an
adjustably weighted lever connected to the said piston by means of rods or links
substantially as hereinbefore specified and for the purpose stated.
II. In a steam heating apparatus a radiator secured at one end thereof to the
building having an outlet orifice at the opposite end closed by a pad of rubber or
other suitable material attached to a spring the pressure of the said pad on the
outlet orifice being adjusted by a screw all substantially as hereinbefore specified
and for the purpose stated.
III. The improvements in steam heating apparatus substantially as hereinbefore
described and illustrated by the accompanying drawings.
Dated this 25th day of August 1893.
FREDK. WALKER,
Agent for Applicant.