Improvements in Vent Plugs for Steam Radiators.
Year: 1888

page_text: [Communicated from abroad by EDWARD PETER WAGGONER, of Syracuse, in the
County of Onondaga, New York, United States of America, Inventor.]
Improvements in Vent Plugs for Steam Radiators.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent Agents,
Southampton Buildings, in the County of Middlesex, 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 that class of devices which are employed upon steam
radiators for venting the same to secure a circulation of the steam, and the object of
the invention is to so construct the vent plug as to start the circulation of the steam
immediately, and then control the circulation automatically by venting the same as
required and to this end the invention consists in a vent plug for steam radiators
having an automatic and a positive vent arranged and located on the same stem
connected with the steam radiator, as hereinafter moro particularly described.
In the accompanying drawing
Figure 1 is a side elevation of my improvement for steam radiators illustrating the
construction and arrangement of parts.
Figure 2 is a longitudinal vertical section of the same, and
Figure 3 is a transverse section taken on line x, x Figure 2.
The invention, as stated, consists broadly in the combination of an automatic and a
positive vent for steam radiators located on the same stem, and I do not restrict
myself to any specific form of construction of the device, that shown on the drawing
is however preferable.
A represents the exterior tube or shell of the automatic vent plug, and is provided
with a thread a and with the cap C having an aperture 9 for the escape of the
steam.
Upon the interior of the cap C I provide the disc c which may be formed integral
with the nut C, and provided with a hole or aperture e¹ through the disc or head c¹
for the passage of the stein of the adjusting screw S which has a bevel s corresponding
with the contour of the recess e' in the head c¹.
The lower end of the stem R of the screw S is provided with screw threads r,
which take in the threaded seat r¹ of the head D' in the coupling B'.

page_text: The tube A of the automatic vent plug screws into the coupling B¹ of the positive
vent plug B as best shown in the sectional view Figure 2.
The positive vent plug is represented by B and is provided with the coupling
extension B having a threaded socket into which the thread a of the tube A is
screwed.
The positive vent plug B is provided with the chamber and the steam inlet e in
the screw plug D by means of which latter it is attached to the steam radiator. The
head D is provided with passages 61, for the escape of the steam from the
chamber into the tube A and the chamber is provided with the outlet c into
the valve screw d which has the aperture for the escape of the steam.
The valve screw d is supported on the threaded plug E which is screwed into the
positive vent B as best shown in the sectional view Figure 2.
It will be observed that the construction of the automatic venting plug A and its
parts and the positive venting plug B is substantially the same as the segregated
devices for this purpose, in common use, and that the difference and novelty of this
invention consists in combining the two so as to operate in conjunction with each
other.
The automatic vent plug A and its parts operate by the expansion and contraction
of the metal tube A, to open and close the valve formed by the passage e¹ of the
screw S in the head c¹ within the tube A and the screw S serves to adjust the auto-
matic vent to secure the desired result, while the plug B serves to vent the radiator
positively by simply operating the screw valve d as in the ordinary positive vent plug
for steam radiators.
By this invention it will be observed that the two forms of vent plugs are combined
in one device, and when it is desired to vent a steam radiator, the circulation of the
steam can be quickly secured by turning on the positive vent and starting the circula-
tion thereby, then closing the screw valve d which throws the steam upward through
the passages, and into the tube A of the automatic vent plug which operates the
automatic vent and controls the circulation of steam thereafter automatically.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed as communicated to me by my
foreign correspondent I declare that what I claim is :-
First The herein described vent plug for steam radiators consisting of the com-
bination of an automatic and a positive vent arranged and located on the same stem,
substantially as and for the purpose, set forth.
Second The combination of the automatic vent plug A with the positive vent
plug B substantially as, and for the purpose, set forth.
Dated this 13th day of March 1888.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.